Durability Of Tools Research Articles

ОСОБЕННОСТИ ОБРАБОТКИ ДЕТАЛЕЙ НЕФТЕГАЗОВОЙ ОТРАСЛИ, ВЫПОЛНЕННЫХ ИЗ ВОЛЬФРАМОВЫХ СПЛАВОВ

The purpose of the work carried out is to increase the effectiveness of hard alloy machining. Within the limits of the paper there is solved a matter of electro-erosion treatment and turning TC 3 alloy parts. Basic investigation methods are: - experiment and comparison, - computer simulation The work resulted in recommendations for the choice of cutters and cutting modes for hard alloy edge machining and also electrode material at electro-erosion treatment. One of the ways to increase productivity and operation quality equipment consists in the application of new materials and alloys including tungsten alloys. Within the limits of this work there are considered the peculiarities in machining TC3 alloy parts for oil-gas industry by the example of the “sleeve” part. For machining inner and outer surfaces there was used a turning operation, and for complex grooves – electro-erosion treatment as the only possible choice for processing because of a small size of the part. The peculiarities hard alloy machining through turning and basic reasons of hard alloy hard-to-workability are described. There are shown approaches to the choice of cutters, and the dependence of surface roughness and tool durability upon cutting mode choice is shown. During turning plate material must have higher strength than alloy under machining. One of the best choices for hard alloy machining is cubic boron nitride. For processing it is necessary to use tool holders with the increased rigidity. There are presented principles of electrode designing for hard alloy electro-erosion treatment and ways for process productivity increase. The application of copper-tungsten pseudo-alloys and m1 grade copper is compared from the point of view of economic purposefulness in their use. In spite of copper-tungsten alloy high durability which gives advantages in processing rate and economy in manufacturing electrodes its use is economically inexpedient and it is more rational to use copper which is cheaper.

Assessment of Durability and Service Life of Two-Layer Hardened Earth Cutters in Various Soil Conditions

Introduction. The earth cutter resource depends on the characteristics of the materials they are made from. In particular, the important parameters that directly affect the tillage tool parts efficiency and durability are the values and ratios of the coefficients of relative wear resistance of the two-layer parts materials, as a rule of the hardened deposited layer and the base material (steel). It is established that the characteristics of the relative wear resistance of the materials for earth cutter parts vary depending on the treated soil properties. The objectives of the study are to consider the influence of soil conditions on the values of the relative wear resistance coefficients of two-layer earth cutter part materials and to carry out a comparative assessment of their resource and use efficiency. Materials and Methods. The authors gave a generalized dependence of the wear proportionality to the existing specific pressures values. The characteristics of soil abrasion were given. The scientific substantiation of the changes in the characteristics of the materials wear resistance at various values of specific pressures was given. Results. The results of the operational resource tests and the studies of two-layer and monometallic earth cutters are presented. The influences of the values of the operating specific pressures on the coefficients of the relative wear resistance of the materials for the tillage machine parts are determined. Discussion and Conclusion. The authors have found out that the coefficients of relative wear resistance of materials are not constant, but vary depending on the current surface specific pressures. The correlation of the specific pressure values with the parameters of the tillage operation, in particular with the furrow slice hardness was established. It has been found that while increasing the cultivated soil hardness, the coefficients of various materials relative wear resistance get closer to each other. The difference varies from 1.80 to1.85 times.

Integrated analysis of drilling tool wear

The integrated analysis of wear of drilling tools is performed. The wear pattern is analyzed versus the build of the acting faces of drilling tools. It is found that a cooling lubricant containing a surface active substance (SAS) has influence on the axial load of the tool and on the drilling capacity. The correlation between wear and current roughness of acting faces of tools is revealed. The additive technology developed and validated for feeding cooling lubricants enables higher competitive capability of allmetal tool owing special grooves made in the drill body by 3D printing to ensure SAS inlet to the rock–drilling tool contact. The comparative study of wear of tools under vibro-percussive loading with regard to the loading condition is carried out. We studied three tools made of steel grades 65S2VA, 5KHNM and of hard alloy VK-8. An attempt is made to utilize hidden capacities of spring steel in manufacture of tool capable to operate under superposition of vibrations. For such rocks as sandstone, limestone, shale, iron ore, clay, etc., having strength categories from IV to X on the Protodyakonov scale, it is possible to use tools made of spring or structural steel, which enables considerable reduction in the cost of drilling. Structural steels used to manufacture drilling tools for hard rock drilling under superposition of vibrations sometimes can efficiently replace expensive tools made of hard alloys. Another beneficial factor is high brittle fracture resistance of instrument steels as against hard-alloy tools. The study reveals the dependence of tool durability on the tool geometry. Preliminary observations show that geometry is an essential factor for tools made of structural and instrumental steels. It is suggested that wear of instrumental steel tool insignificantly differs from hard-alloy wear. In some cases, well-hardened instrumental steel successively competes with hard alloy.

Simulation of vibration piercing of pipe blank at press

In some cases, the processes of piercing or expanding pipe blanks involve the use of high-frequency active vibrations. However, due to insufficient knowledge, these processes are not widely used in the practice of seamless pipes production. In particular, the problems of increasing the efficiency of the processes of piercing or expanding a pipe blank at a piercing press using high-frequency vibrations are being solved without proper research and, as a rule, by experiments. The elaboration of modern technological processes for the production of seamless pipes using high-frequency vibrations is directly related to the choice of rational modes of metal deformation and the prediction resistance indicators of technological tools and the reliability of equipment operation. The creation of a mathematical model of the process of vibrating piercing (expansion) of an axisymmetric pipe blank at a piercing press of a pipe press facility is an actual task. A calculation scheme for the process of piercing a pipe plank has been elaborated. A dependence was obtained characterizing the speed of front of plastic deformation propagation on the speed of penetration of a vibrated axisymmetric mandrel into the pipe workpiece being pierced. The dynamic characteristics of the occurrence of wave phenomena in the metal being pierced under the influence of a vibrated tool have been determined, which significantly complements the previously known ideas about the stress-strain state of the metal in the deformation zone. The deformation fields in the zones of the disturbed region of the deformation zone were established, taking into account the high-frequency vibrations of the technological tool. It has been established that the choice of rational parameters (amplitude-frequency characteristics) of the vibration piercing process of a pipe blank results in significant increase in the efficiency of the process, the durability of the technological tool and the quality of the pierced blanks.

ФОРМИРОВАНИЕ ГЕОМЕТРИИ КРОМКИ РЕЖУЩЕГО ИНСТРУМЕНТА МЕТОДОМ ЛАЗЕРНОЙ АБЛЯЦИИ И ВЛИЯНИЕ ЛАЗЕРНОЙ ОБРАБОТКИ НА СТОЙКОСТЬ ПЛАСТИН ИЗ Р6М5

Increasing the resistance of the cutting tool is a significant engineering problem, which is caused by the widespread use of new structural materials with special physical and mechanical properties and is associated with the development of new hardening technologies. High-performance processing, as well as high demands on the surface quality of the workpiece, are the reason for the development of modern cutting tools. The necessary properties of the cutting tool are achieved through the use of various materials for the cutting tool, coating technology, changes in the macro geometry and the cutting edge of the tool, finishing processing of the cutting edge, etc. As a rule, all modern tool materials are subject to increased demands on the wear resistance of their surface. Moreover, it has already become generally accepted to create a layer on the surface of the instrument, which differs in structure or chemical composition from its core. Almost all characteristics that affect the performance of a cutting tool: hardness, heat resistance, wear resistance, etc. are determined by the properties of its surface layers. Such technologies, first of all, include both physicochemical methods of modifying the structure of instrumental materials, including the process of hardening laser processing, and ion plasma technologies for applying wear-resistant coatings. Among the most effective physicochemical methods for modifying the surface properties of materials is the process of hardening laser treatment. Increasing the durability of a metal-cutting tool made of high-speed steel is possible using laser processing.

RESULTS OF RESEARCH OF PROCESSES OF EXTRACTION OF CUT WITH IMPLEMENTATION OF ULTRASOUND OSCILLATIONS ON THE INSTRUMENT

The possibility of improving the quality of rubber due to the directional action of various types of ultrasonic vibrations, with the aim of forming the maximum compressive residual stresses, will ultimately improve the performance of the rize joint under variable loads. The process of rizenization using forced ultrasonic vibrations has been investigated. When compiling a mathematical model of the process of extrusion of rubber with the imposition of ultrasonic vibrations on the tool, it was assumed that the phenomenon of surface hardening has little effect on the magnitude of the contact pressure and the friction force during plastic deformation. This assumption allows us to simplify the mathematical model by not taking into account this factor. New methods of calculating the contact pressure and specific frictional force during rubber extrusion with the imposition of axial, radial and torsional vibrations are proposed. The description of the deformation processes with the superposition of ultrasonic vibrations was carried out on the basis of the rheological model of deformation of an ideal elastic-plastic body. The work developed nonlinear mathematical models for the study of plastic deformation processes, consisting of equations of tool displacement and equations taking into account the elastic-plate properties of the processed material. This structure of the mathematical model most fully reflects the processes occurring during thread rolling with the imposition of ultrasonic vibrations. As a result of the research, it has been established that the use of forced ultrasonic vibrations during machining with a tool will significantly increase the productivity, tool durability and quality of the processed surface, especially when processing with special physical and mechanical properties. In the study of the contact interaction of the tool with the part with the imposition of ultrasonic vibrations in the axial and radial directions, as well as in the imposition of torsional vibrations, it was found that the use of axial vibrations is on average 50 % more effective.

Effect of cooling method on small diameter blind-hole drilling of new β-type dental Ti-Zr-Nb alloy

Abstract A β-type titanium-zirconium-niobium alloy (Ti-Zr-Nb alloy) is an ideal substitute for the currently used dental implants with the advantages of high specific strength, low elastic modulus, good biocompatibility, non-toxicity and corrosion resistance. However, its low elastic modulus and sticking characteristics results in poor heat dissipation and severe wear and tear making it difficult to drill. In this paper, a 2 mm diameter solid carbide twist drill was used to conduct small hole drilling experiments on a new, self-smelted, low-modulus β-type Ti-Zr-Nb alloy. The effects of the drilling parameters and five cooling methods (dry, flooded, cryogenic, minimum quantity lubrication (MQL) and cryogenic-minimum quantity lubrication (CMQL)) on thrust force, surface quality, microhardness and tool wear were studied. Results showed the minimum thrust force was obtained during the drilling process with the MQL cooling method and the β-type Ti-Zr-Nb alloy which did not exhibit low temperature brittleness was not suitable for processing at cryogenic cooling because the low temperature changed the yield strength and the stress for plastic deformation of the material's surface. The main wear mechanism of the β-type Ti-Zr-Nr alloy was adhesion, and the material properties and crystal structure of Ti-Zr-Nb alloy were the physical foundations that produced the adhesion phenomenon. However, cooling conditions also had an important effect on wear. Oxidative wear tended to occur when there was little or no coolant, and fatigue wear was observed with the signal of cracking, pitting and layer delamination using the cooling method of CMQL. The sawtooth angle ϕ of chips was larger under the dry drilling and cryogenic cooling methods, than that of the other three cooling methods. The MQL cooling method is recommended to effectively improve the tool durability.

Characteristic of the wear of a tool coating based on amorphous carbon during chipboard milling

Characteristic of the wear of a tool coating based on amorphous carbon during chipboard milling. The study verified the durability and the course of wear during the durability tests of the TiAlN / a-C:N double tool coating. The aforementioned coating consisted of a bottom layer of TiAlN and a top layer based on nitrogenenriched amorphous carbon. Standard replaceable cutters for milling heads made of WC-Co sintered carbide were subjected to the modification process. The coating was applied using plasma by RF Magnetron Sputtering. During the tests, the blade wear was measured using a workshop microscope. The VB max indicator measured on the clearance face was adopted as the blunting criterion and its maximum value was set on 0,2 mm. The results show that the additional coating of amorphous carbon contributed to the increase of the tool durability determined with cutting distance. The use of only a single layer based on TiAlN shortened the durability by about 3%. On the other hand, applying both the bottom and top layers TiAlN /a-C:N) extended the cutting distance by about 24%. The research showed a clear advantage in terms of the durability of the blades modified with a multi-layer coating in relation to a single-layer. Moreover, the positive effect of the top layer containing amorphous carbon on tool durability has been demonstrated.

Simplified method of forecasting the influence of cooling intensity during hardening on the mechanical properties of steel products

The object of research is the structure and mechanical properties of steel at the central points of hardened products. In this work, a technique has been developed based on comparing the cooling rate in the central region of the product with the cooling rate of a test sample with a diameter of 5–6 mm, investigated in laboratory conditions. By this time, this approach was not possible, since two main problems had not been resolved. The transition from a small sample to a real product during quenching was scientifically unreasonable due to the great complexity of the problem. There were no known mathematical relationships for calculating the cooling rate when quenching products of arbitrary shape in liquids. Recently, these problems have been solved and steel with optimal hardenability has appeared, which can be cooled very quickly. This simplified the solution to this problem. The technique developed in this work helps to temper metal products in such a way that there are large compressive residual stresses on the surface, and in the middle there is a bainite structure of high strength and increased toughness. This allows to increase the service life of hardened products, reduce the percentage of alloying elements, and also maintain a clean environment. In this regard, based on the achievements of science in recent decades, a method is proposed for predicting the structure and mechanical properties of steel during quenching of real parts. This technique can be used to increase the durability of machine parts and tools. The work also notes the prospects of using aqueous solutions of low-concentration polymers for intensive hardening of steel products. In this case, when simulating the cooling rate during quenching of real products, test samples are quenched in aqueous solutions of the same polymers of increased concentration in order to form a stable vapor film. The stable vapor film ensures a stable heat transfer coefficient. This increases the accuracy of modeling and expands the capabilities of the proposed calculation method.

Durability Map for The Friction Stir Welding Tools with Flat Faced Pins

In friction stir welding, tools made with flat faced pins deliver comparatively higher strength joints than circular pins. However, its non-axisymmetric cross section about the rotational axis results in fluctuating stress along its surface that leads to premature tool failure. This requires a systematic definition for process parameter selection domain based on the number of flat faces in the pin to improve tool life. Temperature dependent strength of the material to be joined in the stir zone is the only source of opposing force for the tool movement. To predict opposing force, temperature gradient developed by the different levels of process parameters in the stir zone is numerically quantified with an experimentally validated model. Based on the estimated temperature, maximum stress acting on the tool pin is quantified with a remodified temperature dependent analytical model. The effect of increase in process temperature on the strength of the weld joint is experimentally analysed through the investigation of change in hardness value in heat affected zone. Obtained results are used to develop tool durability maps for tools with flat faced pin in a domain on which higher and lower limits are fixed by considering satisfactory level of joint strength and tool life respectively. These maps provide flexibility in the parameter selection with an acceptable level of compromise in joint strength or in tool life based on the quality requirement of weld joint.

Conical Pick Production Process

Abstract One of the basic methods of mechanical rock mining is cutting, which faces increasingly difficult working conditions. Despite the rapid development of machines used in underground and opencast mining as well as in tunnel building, construction industry and road engineering, the problem of insufficient durability of mining tools remains unsolved. In addition to drilling and, to a lesser extent, planing, cutting provides a huge market for tools. Currently, the process of cutting is mainly based on conical picks. The cutterheads of cutting machines are equipped with several dozen, and frequently – more than one hundred conical picks, which, due to their workability and abrasiveness, sometimes work only a few hours. There is a market demand for over two hundred models of conical picks. This is due to the huge variety of shapes and sizes of picks as well as the methods of their mounting in the holder. The article briefly presents various solutions of conical picks, their construction, methods of protection, dimensions and materials used. Next, based on materials produced by ZWM Carbonex, the classic method of their manufacture using the turning technology has been described. The authors have also presented briefly the use of die forging for the large-scale production of picks, applied by Górnicza Fabryka Narzędzi Sp. z o.o.

Experimental evaluation of the efficiency of lubricating process media during the running-in period of a metal-cutting tool

The possibility of increasing the durability of a cutting insert made of high-speed steel with a wear-resistant TiN coating due to the use of lubricating process media during the running-in period of the cutting tool is considered. Based on the analysis of the data obtained, an analogy in the mechanisms of the hardening action of the refrigerant and wear-resistant coatings is presented. It is shown that the durability of a metal-cutting tool substantially depends on the initial conditions of its operation.

STUDYING OPPORTUNITIES OF OPTIMIZATION METAL BOND DIAMOND TOOLS PRODUCTION TECHNOLOGY

The technology for manufacturing diamond tools based on the method of two-stage free liquid-phase sintering of diamond-metal compacts developed previously by the authors was investigated. To study the possibilities of optimizing the manufacturing technology of diamond-metal composites by free sintering, a metal bond of the composition (wt.%) 51% Fe - 9% Ni - 32% Cu - 8% Sn was chosen. Studies of the physical-mechanical properties of pressed and sintered in an argon medium samples of sizes 40x5x6 mm were carried out, without prior sintering in a reducing medium and repeated cold pressing. In order to determine the optimal values of temperature and the duration of heat setting required to obtain sufficiently hard and strong samples sintered in a protective medium, we studied the effect of temperature and duration of sintering of samples obtained at various cold pressing pressures on the hardness and strength of the tool. The results of studies of the hardness and shear strength of composite materials 51Fe - 9Ni - 32Cu - 8Sn, obtained by the simplified technological scheme allow us to judge the possibilities of its application for the manufacture of diamond tools. We propose to increase the tool durability by metallizing with thermal diffusion saturation of diamond powders with titanium in a halogen-containing medium. It was found that using the optimized technology for the production of composite material 51% Fe - 9% Ni - 32% Cu - 8% Sn, which includes pressing a powder mixture and free liquid-phase sintering of preforms in a neutral medium, it is possible to obtain samples with sufficiently high physical and mechanical characteristics. Optimized technology can be recommended in the production of high-performance diamond tools.

Study on geometric features of conical threads

The article studies the problem of oil/gas pipe conical thread reinforcement; in particular, the geometrical fundamentals for tool design for reinforcement. The article considers the main types of conical threads for pipes used in oil/gas industry. It was determined, that to obtain initial data for tools, used to reinforce thread crest and flank, it is necessary to consider conical threads not only as helical lines, but also as helicoid surfaces, to determine what helicoid parameters make the thread conical and obtain relations for the calculation of these geometric parameters. The authors determined geometrical parameters of conical threads and design parameters to develop rollers with deformed protrusions for simultaneous reinforcement of aforementioned thread crests and flank to improve tools for their frictional reinforcement. It was stated, that contrary to cylindrical threads, helicoid’s angles of inclination, which form conical threads, differ not only by the angle of inclination to the plane normal to their axes, but also by the values. The study of conical thread geometrical features refers to a cylindrical one allows to use these features in the design or improvement of tools for its manufacture and/or reinforcement. This approach allows improving the tools for frictional reinforcement of conical locking threads by modifying the lateral deforming elements. It makes possible to simplify tool manufacture, increase tool durability, reinforce the conical thread surface, and improve the quality, performance and economy of the conical thread frictional reinforcement.

The use of high-resolution methods of research in the design of the diamond-matrix interface to increase the durability of the diamond tool

The results of studying fundamental and applied problems regarding the formation of boundary layers between diamond and carbide matrix are presented with the goal to develop a highly resistant diamond tool. The new approaches to the synthesis of diamond-carbide materials combining diamond metallization and sintering in a single-stage technology are presented. The developed technology eliminates the re-heating of a metallized coatings which results in their destruction and enhanced graphitization of diamond (these phenomena restrict using metallization procedure to improve diamond retention and synthesis of high-functional composites for diamond tools). The goal of the study is analysis the structural and phase state of the «diamond – carbide matrix» interface in a diamond tool obtained by the new technology and the main factors determining the level of diamond retention in the presence of a metallized coating. Unique opportunities provided by modern high-resolution methods of research were used in the study. The elemental composition and morphological features of the diamond-matrix interface were studied using the methods of scanning electron microscopy, atomic force microscopy, X-ray microanalysis and Raman spectroscopy. Identification of the reaction products, including non-diamond carbon was performed. It is shown that the introduction of the powder-metallizer significantly modified the contact boundaries and provide conditions for improving the chemical and mechanical adhesion of the diamond-matrix system. The formation of the well-developed nano- and sub-microscale roughness of the diamond surface and dense filling of the existing voids with nanoscale layers of metal-infiltrate was revealed. The multilevel organization of highly structured elements of the transition zone with the minimal graphitization ensured the monolithic character and strength of the diamond-matrix bond. Comparative service tests of preproduction and control samples of diamond dressers proved the efficiency of developed hybrid technology (the specific performance of diamond tools increased by 39 – 45%). New fundamental and applied results have been obtained in the field of studying interface zones in crystalline multiphase systems that can be used to regulate adhesion phenomena at the interphase boundaries and develop highly efficient composite materials.

Rethinking Use-Wear Analysis and Experimentation as Applied to the Study of Past Hominin Tool Use

In prehistoric human populations, technologies played a fundamental role in the acquisition of different resources and are represented in the main daily living activities, such as with bone, wooden, and stone-tipped spears for hunting, and chipped-stone tools for butchering. Considering that paleoanthropologists and archeologists are focused on the study of different processes involved in the evolution of human behavior, investigating how hominins acted in the past through the study of evidence on archeological artifacts is crucial. Thus, investigating tool use is of major importance for a comprehensive understanding of all processes that characterize human choices of raw materials, techniques, and tool types. Many functional assumptions of tool use have been based on tool design and morphology according to archeologists’ interpretations and ethnographic observations. Such assumptions are used as baselines when inferring human behavior and have driven an improvement in the methods and techniques employed in functional studies over the past few decades. Here, while arguing that use-wear analysis is a key discipline to assess past hominin tool use and to interpret the organization and variability of artifact types in the archeological record, we aim to review and discuss the current state-of-the-art methods, protocols, and their limitations. In doing so, our discussion focuses on three main topics: (1) the need for fundamental improvements by adopting established methods and techniques from similar research fields, (2) the need to implement and combine different levels of experimentation, and (3) the crucial need to establish standards and protocols in order to improve data quality, standardization, repeatability, and reproducibility. By adopting this perspective, we believe that studies will increase the reliability and applicability of use-wear methods on tool function. The need for a holistic approach that combines not only use-wear traces but also tool technology, design, curation, durability, and efficiency is also debated and revised. Such a revision is a crucial step if archeologists want to build major inferences on human decision-making behavior and biocultural evolution processes.

Development of Diamond–Metal Compositions for Diamond Tools

A technology that allows one to create new diamond–metal compositions for stone-cutting diamond tools is proposed, which is based on selecting new metallic binders with the use of powders of tailings (crushed samples of tungsten carbide and cobalt) of Tyrnyauz Tungsten–Molybdenum Plant and black tailings of Pobedit plant with almost the same composition. The proposed technology substantially increases the efficiency of diamond–metal compositions. The addition of powders of Tyrnyauz Tungsten–Molybdenum Plant or their mixtures with powders of black tailings of Pobedit plant to the blend provides finer porosity and increases the durability of diamond tools.

Modification of tools for wood based materials machining with TiAlN/a-CN coating

This study is focused on the usage of anti-wear layers based on carbon with the aim of improving the tool durability of sintered carbides composed of tungsten grains with cobalt as a binder (WC-Co) for wood-based material machining. The tested coating consists of a bottom TiAlN sublayer and a-CN top surface layer containing nitrogen-doped carbon. A TiAlN/a-CN double layer is deposited in an industrial DC magnetron sputtering system. The layers prepared in this way are examined with scratch and microhardness tests, as well as chemical analysis, in order to obtain the chemical composition of the coatings.. The standard exchangeable cutting blades made of sintered carbide are used in machining tests conducted on a CNC working centre. The machining properties of the double TiAlN/a-CN layer are shown to be superior in comparison to the standard tool.

CRITERIA FOR ASSESSING THE COST OF MANUFACTURING PROCESSES AND YOU EFFECTIVITY

The aim of this paper is to theoretically evaluate the process of machining metallic materials and at the same time evaluate the cost reduction defined by the evaluation criteria. When cutting conditions and tool durability optimizing, it is necessary to apply certain optimizing criterion within certain restraining conditions. [12] The restrictions are given by technical parameters of a machine, tool, machined material, required quality of machined surface etc. The essential economic criterion is the amount of production cost. The notion of “machinability of materials” is a complex of characteristics of the machined material which is monitored in the view of its fitness for the production in a certain way of machining.

Experimental Study on Wear of Indexable Coated Blades as Applied to Cutting of PCrNi3MoVA Gun Steel Workpieces

In this paper, based on the theoretical study of tool wear and the systematic analysis of the main factors affecting the tool durability, four types of PVD and CVD-coated blades from three manufacturers were subjected to cutting tests using PCrNi3MoVA gun steel workpieces. The wear morphology, fatigue curves, and chip patterns of the tested blades were comparatively analyzed. The influence of the coating type on the tool durability was investigated using a scanning electron microscopy and energy dispersive spectroscopy. The results obtained strongly indicate that TiAlN coating deposited by the PVD technology has the best thermal stability, temperature oxidation resistance, and tool durability when cutting PCrNi3MoVA gun steel workpieces under semi-finishing conditions. The wear resistance of the other three types of blades was relatively lower due to less favorable coating compositions and structures. The study findings are instrumental in the substantiated selection of cutters for practical applications and provide a reference for the design optimization of indexable coated inserts.