Abrasive Particles Research Articles

Analysis on machining uniformity in reciprocating magnetorheological polishing based on abrasive particle trajectory

PurposeThis paper aims to study the effects of the processing parameters in the reciprocating magnetorheological polishing (RMRP) on abrasive particle trajectory by the simulation analysis, which provides a basis for the machining uniformity of the workpiece.Design/methodology/approachThe principle of the RMRP method is discussed, and a series of simulation analysis of the abrasive particle trajectory are performed to evaluate the effects of the workpiece’s rotational speed, the eccentric wheel’s rotational speed, the eccentricity and the frame gap on abrasive particle trajectory by using the RMRP method.FindingsThe processing parameters have a significant influence on the abrasive particle trajectory, and then the machining uniformity of the workpiece is affected. Under certain experimental conditions, the height difference of workpiece measuring points varies between 4 and 11 µm, and the height difference of equal radial measuring points is less than 1.5 µm by optimizing processing parameters.Originality/valueIn this study, the optimal processing parameters can be obtained by the simulation analysis of abrasive particle trajectory, which can replace the experimental methods to obtain the reasonable processing parameters for the machining uniformity of the workpiece. It provides references for the selection of processing parameter values in magnetorheological polishing process.

Dry abrasive wear and solid particle erosion assessments of high entropy alloy coatings fabricated by cold spraying

Recent advances in advanced metallic alloys have enabled the development of high entropy alloys (HEAs) for extreme engineering environments. HEAs are characterized by their mixing of elements with equimolar concentrations or near to equimolar concentrations, which enables the formation of solid-solution structures due to inherent high configurational entropy. With the advancement of HEAs, the attractiveness of these alloys as cold-sprayed coatings for wear resistant surfaces has been increasing. In the present study, a low-pressure cold spraying technique was employed to fabricate two new mechanically alloyed AlCoCrFeMoW and AlCoCrFeMoV HEA coatings. The phase formations, microstructure evolutions, and average microhardness of the fabricated HEA coatings were systematically investigated, in order to assess their resistance to dry abrasive wear and solid-particle erosion. The results showed that the cold-sprayed HEA coatings exhibited refined microstructure and low porosity, with the presence of body-centered cubic (BCC1 and BCC2) structures and CrMo intermetallic phases. Microhardness results revealed that AlCoCrFeMoV HEA coatings achieved the highest average hardness of around 561±63HV, such that it was 35% and 52% higher than that of AlCoCrFeMoW and AlCoCrFeMo HEA coatings, respectively. Dry abrasive wear results showed lower wear rates were achieved for AlCoCrFeMoV HEA coatings (590×10−6mm3/Nm), followed by AlCoCrFeMoW (660×10−6mm3/Nm) and AlCoCrFeMo HEA coatings (720×10−6mm3/Nm). However, damage during solid particle erosion was found to be higher in case of AlCoCrFeMoV HEA coatings compared to the other two coatings, suggesting no apparent correlation with microhardness values. These results suggest that the existence of high weight fractions of solid-solution phases in conjunction with refined microstructure and low porosity resulted in improved resistance to abrasive loading for the AlCoCrFeMoV HEA coatings but undermine performance and resistance to solid particle erosion damage.

Size Effect of Impact Abrasive Particles on Wear and Surface Hardening Behavior of High-Manganese Steel

Size Effect of Impact Abrasive Particles on Wear and Surface Hardening Behavior of High-Manganese Steel

Modeling of material removal in magnetic finishing based on Maxwell's stress tensor theory and its experimental validation

Magnetic finishing is an extremely suitable process for processing high quality surface aluminum alloy mirrors due to the low damage. Obtaining an accurate removal function is essential to achieve a controlled finishing of aluminum alloy mirror. In this study, the magnetic field between the magnetized abrasive particles was simplified by equivalent substitution method after modeling the geometry of the abrasive and simulating its magnetic field. Distribution of finishing pressure was calculated based on Maxwell's stress tensor theory. Distribution of the finishing pressure was uneven, and the finishing pressure in the center of the finishing area was about 10 times that of the edges. And the removal amount was calculated with Preston's equations. The experimental results of the removal amount show that the removal amount increases and then decreases as the magnetic abrasive content in the abrasive decreases. The removal amount has a negative correlation with the finishing gap. Stronger magnetic fields can increase the removal amount. After 10 minutes of machining, the surface roughness Ra of the aluminum plate decreased from 0.189 μ m to 0.030 μ m . The relative error is less than 7% compared to the simulation results when the finishing gap is 2-3 mm. The removal depth experimental results show that the maximum removal depth reaches 117 nm after 10 minutes of machining at 950r/min, with a relative error of 3.5%. This accurate removal function can provide a theoretical basis for achieving controlled magnetic finishing.

Study on wear resistance of local aluminum alloy reinforced by carbon fiber transfer membrane region

In order to study the effect of fiber reinforced resin matrix composites on the friction properties of aluminum alloy, 7075 aluminum alloy, Carbon fiber reinforced plastic (CFRP) and 7075-Al/CFRP hybrid samples were selected for pin-disk friction test. White light interference and scanning electron microscopy were used to analyze the surface morphology of the friction samples. Secondly, the formation process of the transfer membrane was analyzed by Raman test and energy spectrum. Finally, the strength of the transfer film was verified by scratch test. The results showed that the friction coefficients of 7075-W and 7075-T6 aluminum alloy are 0.419 and 0.398, and the wear rates are 0.288% and 0.273%, respectively. For CFRP and 7075-Al/CFRP hybrid samples, the microscopic study of friction interface showed that CFRP and aluminum alloy abrasive particles exchanged elements under the dual action of pressure and shear force, thus forming Transfer Membrane Region (TMR). TMR with strong self-lubrication preferentially supported the friction load during the friction process, thus reducing the friction and wear of aluminum alloy. The friction coefficient and the wear rate of the 7075-Al/CFRP hybrid sample were reduced by 62.5% and 78.2%, respectively in comparison to pure 7075 aluminum alloy sample.

Development of a single particle sizing system for monitoring abrasive particles in chemical mechanical polishing process

Development of a single particle sizing system for monitoring abrasive particles in chemical mechanical polishing process

Research on Chemical Mechanical Polishing Technology for Zirconium-Based Amorphous Alloys

Crystallization often occurs in the processing of amorphous alloys, causing the materials lose their excellent properties. The study adopts chemical mechanical polishing of amorphous alloys, presenting the effect of the rotational speed of the polishing turntable, size of abrasive, polishing pressure, and oxidant concentration. The Taguchi method is used to find the best processing parameters, and AFM is used to characterize the machined material surface. At the same time, XPS is used to detect the change of oxide film composition with the addition of oxidant. The results indicate the optimum process parameters: rotational speed of the polishing turntable is 75 r/min, polishing pressure is 28.3 kPa, the size of abrasive is 0.5 μm, and the size of abrasive is a significant factor affecting surface roughness Sa. In addition, as the size of abrasive increases, the material removal rate increases while the surface roughness Sa increases. At pH 10, with an abrasive particle size of 0.5 μm, as the H2O2 concentration increases, the MRR first rapidly decreases at 0.21 wt.% H2O2, and then gradually increases, while the Sa decreases. Furthermore, with the addition of oxidant, the main composition of the surface oxide film changes from oxide to hydroxide, and the contents of Zr4+ and Cu0/Cu1+ elements increase. The findings can provide a feasible chemical mechanical polishing process for zirconium-based amorphous alloys to obtain a satisfactory polishing effect.

Synthesis of Hierarchical Layered Quasi-Triangular Ce(OH)CO3 and Its Thermal Conversion to Ceria with High Polishing Performance.

Layered quasi-triangular Ce(OH)CO3 assembled from primary nanoparticles was synthesized via a solvothermal method and converted into CeO2 abrasive particles by calcination at 800-1000 °C. With the increase of calcination temperature, the primary particle size increased and the microstructure, mechanical hardness, and chemical activity of the CeO2 particles changed, thus affecting the polishing performance. The calcined products obtained at 800, 850, and 900 °C maintained the layered edge structure of the Ce(OH)CO3 precursor and had a relatively high specific surface area and surface Ce3+ concentration. The samples calcined at 950 and 1000 °C lost the layered structure due to the large-scale melting of the primary particles, and their surface chemical activity decreased. The polishing experiments on K9 glass showed that, with the calcination temperature rising from 800 to 1000 °C, the material removal rate (MRR) first increased and then decreased sharply. The initial increase of MRR was attributed to the increase of mechanical hardness of the layered quasi-triangular CeO2, and the subsequent decrease of MRR was related to the decrease in surface chemical activity and disappearance of the layered edge structure. The product calcined at 900 °C had the highest MRR and best surface quality after polishing due to the layered edge structure and optimal match of chemical activity and mechanical hardness.

Application of sodium bicarbonate abrasive jet technology for PCB desmear process: Conditions and simulation

The desmear of blind hole is a critical process in Printed Circuit Board (PCB) manufacturing. An environmental-friendly, non-destructive and efficient sodium bicarbonate abrasive jet desmearing method was proposed in this study. The desmearing process was to drive the abrasive particles into the blind hole by pressurized air, and realized the cleaning of drilling dirt through collision. By comparing the cleaning effect, the process parameters (jet pressure, jet time, jet angle and jet distance) of sodium bicarbonate abrasive jet desmearing method were optimized, and the optimal process parameters were determined as 0.3 MPa, 10 s, 90° and 1 cm. Under the optimal process conditions, by comparing with the permanganate swelling method that widely used in the industry, it was confirmed that the cleanliness of sodium bicarbonate abrasive jet desmearing method could reach the commercial cleaning level while ensuring no damage, and the improvement of surface roughness (Ra = 7.57220 μm) was also at the same level. Through the research on the abrasive recycling process, it was detected that the recovery rate of abrasive could reach 80.18% by a simple recrystallization operation, which could significantly reduce the cleaning cost. The trajectory of abrasive particle in the blind hole was simulated by the gas-solid coupling discrete phase model (DPM), and the vortex cutting erosion desmearing mechanism based on the analysis of velocity vector characteristics was proposed. Due to its advantages of high cleaning efficiency, low damage, less pollution and recyclability of abrasive, the sodium bicarbonate abrasive jet desmearing method was expected to be applied in PCB blind hole desmearing process in the future.

Multi-response optimization of magnetic abrasive finishing for AZ-31 alloy using RSM-GRA approach

A magnetic abrasive finishing is a non-traditional technology utilizes a flexible magnetic abrasive brush comprises of magnetic abrasive particles under the influence of the magnetic field to perform nano-finishing. The material removal (MR) and percentage change in surface roughness (%∆R a ) are responses governing the efficiency of the finishing process. But, a high material removal during the finishing operation leads to the loss in form/shape of the finished surface. A compromise has to be made considering the two responses for an optimized finishing operation. In this work, a multi-response optimization was executed using grey relation analysis (GRA). The objective functions considered are to maximize %∆R a and minimize MR. The experiments were designed and conducted using response surface methodology. The workpiece material was taken as AZ-31 alloy. The optimized conditions observed were %∆R a as 67.43% and MR as 63 mg at the working gap of 2 mm, rotational speed of 600 rpm, voltage of 18 volts and abrasive particle mesh number of 400 mesh. The GRA also reveals that the working gap has the strongest influence on the finishing considering both responses concurrently. The ANOVA analysis was also executed to analyze the significant interaction effects of process parameters on output responses.

Burr formation mechanism and morphological transformation critical conditions in grinding of nickel-based superalloy honeycomb cores

Nickel-based Superalloy Honeycomb (NBSH) is widely used in aerospace field due to the high temperature resistance, high specific strength and light weight. However, the NBSH is extremely prone to form burrs during processing. The unreasonable burr morphology causes insufficient welding strength or false welding between NBSH and skin, resulting in premature failure of the parts. Hence, the burr formation mechanism and morphological transformation critical conditions in grinding NBSH were investigated based on finite element method (FEM) and experiments. Furthermore, the orthogonal experiments were carried out to investigate the effects of grinding parameters on burr and obtain the suitable parameter intervals to restrain the flash burr formation. The results indicate that due to the absence of supporting material, the extruded material of edge transforms into the Fourth Deformation Zone (FDZ). The FDZ rotates a certain angle due to the extrusion of abrasive particle, which leads to the fact that the FDZ cannot be removed and remains on the honeycomb wall, thus forming micro burr. If the material removal per unit time is large, the chip is not removed from FDZ. The parts that should have been chips are bonded with micro burr to form a flash burr. To restrain the flash burr formation, the suitable intervals of grinding depth, grinding speed and feed speed are 5–15 μm, 60–70 m/min and 500–1000 mm/min, respectively.

Finishing performance of polyurethane-based flexible tools fabricated using solvent casting and particulate leaching method

Oxygen-free high thermal conductivity (OFHC) copper is a common material for mirrors in different optical applications. As it is a soft material and easy to scratch, the nanofinishing using traditional finishing processes is difficult. A flexible abrasive tool that can adapt to the shape of the component and apply uniform and gentle pressure is required to achieve a high-quality surface finish on the soft materials. Flexible abrasive tools are fabricated using the solution casting and dissolution method with open porous microstructure and uniformly dispersed silicon carbide particles in a polyurethane polymer matrix. Mechanical and finishing characteristics of the fabricated tools are obtained under dry and wet conditions. The developed tools are self-lubricating and self-replenishing, reducing tool wear and eliminating burn marks on finished surfaces. Scanning electron micrographs and energy dispersive spectroscopy are used to investigate the tool microstructure and abrasive particle distribution before and after finishing. The mechanical behaviour of tools is studied using a dynamic mechanical analyser. Porosity is measured using the interconnected void volume, and fluid absorption rate is calculated through weight measurement before and after fluid absorption. The surface finish of finished surfaces is analysed using an optical surface profilometer. Results show that the flexible abrasive tool performs the best under wet conditions. In a single pass, a wet salt-leached tool achieved a reduction of 42.2 % on a surface having a lower initial roughness, whereas a wet pure polymer tool achieved a reduction of 45.7 % on a surface having a higher initial roughness. Finally, areal surface roughness of 34 nm is achieved in 16 mins of finishing experiment using pure polymer tool followed by salt-leached tool.

THE STUDY OF THE CAUSE OF FAILURE OF THE MAIN ELEMENTS OF THE CHIRTMAS TREE AND EFFECTIVE SOLUTION WAYS

The article is devoted to the study of the causes of failures of fountain fittings in the process of operation, the measures taken to eliminate failures, increase efficiency and increase the overhaul period. İn order to improve the efficiency of the fountain fittings, the works that can be performed during major and current repairs are investigated. The main purpose of this article is to increase the reliability of the design of the fountain fittings. This article explores the causes of failure that may occur in wellhead christmas trees, their causes and solutions. The general design of x-mas trees is shown. Basically, christmas tree fittings are cross-shaped, three-necked and, depending on the design, for a working pressure of 21, 35, 70, 105, 140 MPa. x-mas trees perform the main and most important work, such as hanging tubing, shutting off the wellhead, providing the necessary pressure on the wellhead, and regulating oil production. As is known, during the operation of oil and gas wells, along with the main product, clay, sand and abrasive particles are removed from the well. Among these impacts, christmas trees are exposed to the corrosive attack of sand flowing with oil, gas and water during operation. It is the cross and the connecting elements of the x-mas tree - closing valves, the cross, the christmas tree, a pair of gates - saddles, the sealing elements that are most susceptible to eating (wear). Due to the fact that these processes occur under high pressure, a number of important requirements are imposed on the design of x-mas trees. İmproving the design of x-mas trees, which is wellhead equipment, is always one of the most important tasks in operation. In order to improve the efficiency of x-mas trees, the works that can be performed during major and current repairs have been studied. The main purpose of this article is to study the improvement of the reliability indicators of the x-mas tree design, increase the overhaul period. Keywords: Christmas tree, stem, valve, globe valve,packing element, shut-off valve, disc - saddle pair.

The Effect of Surface Treatments on Zirconia Bond Strength and Durability.

To evaluate the effects of airborne particle abrasion (APA) combined with MDP-containing resin cement, a glass-ceramic spray deposition (GCSD) method on the shear bond strengths (SBSs) and durability of 3 mol% yttrium oxide-stabilized zirconia ceramic (3Y-TZP) compared with lithium disilicate glass ceramics (LDGC). 3Y-TZP disks were randomly treated as follows: for Group APA+MDP, 3Y-TZP was abrased using 50 μm Al2O3 particles under 0.1 Mpa and bonded with MDP-containing resin cement; for Group GCSD, 3Y-TZP was treated with the GCSD method, etched by 5% HF for 90 s, silanized and bonded with resin cement without MDP. Group LDGC was bonded as the Group GCSD. X-ray diffraction (XRD), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and energy dispersive X-ray detector (EDX) were used to analyze the surface chemical and micro-morphological changes of the ceramics before bonding. The bonded ceramic specimens were randomly divided into subgroups, and the SBSs were determined before and after 10,000 thermocycling. The SBSs were analyzed with a one-way ANOVA analysis. Failure modes were determined with optical microscopy and SEM. The XRD, ATR-FTIR and XPS results identified the formation of lithium disilicate and zirconium silicate on 3Y-TZP after GCSD. The SEM micrographs revealed that 3Y-TZP surfaces were roughened by APA, while 3Y-TZP with GCSD and LDGC surfaces could be etched by HF to be porous. The APA treatment combined with MDP-containing resin cement produced the high immediate zirconia shear bond strengths (SBSs: 37.41 ± 13.51 Mpa) that was similar to the SBSs of the LDGC (34.87 ± 11.02 Mpa, p > 0.05), but, after thermocycling, the former dramatically decreased (24.00 ± 6.86 Mpa, maximum reduction by 35.85%) and the latter exhibited the highest SBSs (30.72 ± 7.97 Mpa, minimum reduction by 11.9%). The 3Y-TZP with GCSD treatment displayed the lower zirconia SBSs before thermocycling (27.03 ± 9.76 Mpa, p < 0.05), but it was similar to the 3Y-TZP treated with APA and MDP containing resin cement after thermocycling (21.84 ± 7.03 vs. 24.00 ± 6.86 Mpa, p > 0.05). The APA combined with MDP-containing resin cement could achieve the high immediate zirconia SBSs of those of the LDGC, but it decreased significantly after thermocycling. The GCSD technique could yield the immediate zirconia SBSs similar to those of LDGC before thermocycling, and long-term zirconia SBSs were similar to those of 3Y-TZP treated with APA followed by MDP-containing resin cement after thermocycling. Hence, the GCSD technique could enrich zirconia surface treatments and is an alternative to zirconia surface pretreatment for 3Y-TZP bond durability.

Abrasion Resistance and Water Absorption Characteristics of Ti-HAp Hybrid Reinforced Polyetheretherketone Biocomposites

The influence of abrasion on biomedical implant in human body is a constant cause of pain, discomfort and sometimes a repeat of surgery as a result of the complications from the effects of wear on the implants and the negative consequences of the resultant abrasive particles on the surrounding tissue and bodily environment. To alleviate this, a titanium-hydroxyapatite hybrid reinforced polyetheretherketone (PEEK) biocomposite material was developed, characterized and tested. X-Ray Diffraction characterization revealed that the calcined eggshell was composed mainly of lime and portlandite. The calcined eggshell was then used in the synthesis of hydroxyapatite powder (HAp) with characteristic bands confirmed by FTIR spectroscopic analysis. Biocomposites were developed from the blend of titanium and hydroxyapatite powders in varying proportions as reinforcements in PEEK matrix. The developed composites and control sample were subjected to abrasion and water absorption tests from where it was revealed that biocomposite sample reinforced with 10 wt.% orthophosphoric acid synthesized eggshell possess optimum abrasion resistance with a wear index of 0.20 mg/cycle with an acceptable level of water absorption next to the unreinforced polyetheretherketone over a period of 35 days.

Material Removal Characteristics of Spherical-Array-Focused Ultrasonic Abrasive Machining.

To improve the ultrasonic energy and realize far-field ultrasonic abrasive machining of complex surfaces, a spherical-array-focused ultrasonic abrasive machining system was established. By combining ultrasonic field simulation, detection and a single-factor experiment, the influences of the ultrasonic generator current, abrasive concentration, and particle size on the material removal properties and surface quality evolution of quartz glass were investigated. When the current was less than 0.4 A, the material removal showed plastic removal at the nanoscale. When the current was more than 0.5 A, the cavitation phenomenon formed micron-scale impact removal traces on the workpiece surface. The increase in abrasive concentration increased the impact density and material removal rate, while excessive abrasive concentration increased the impeding effect between abrasive particles and reduced the material removal rate. Moreover, the increase in abrasive particle concentration enhanced heterogeneous cavitation nucleation, promoted the removal of abrasive impact materials under the action of a cavitation jet, and inhibited the removal of direct surface cavitation. The abrasive particle size affects the heterogeneous cavitation nucleation and the acceleration of the cavitation jet on abrasive particles, which affects the material removal rate and surface quality. By controlling the energy of the focused ultrasound and abrasive parameters, the plastic or brittle domain removal of quartz glass can be achieved at the micro- and nanoscales.

A novel powder-metallurgical eco-friendly recycling process for tool steel grinding sludge

This work comprehensively investigates the reuse of AISI D2 tool steel grinding sludge as secondary raw material into a powder metallurgical process route. The tool steel grinding sludge initially contains about 15 mass% of silicon carbide and aluminium oxide abrasive particles as well as residual cooling lubricant emulsion consisting of water and oil leading to an increased carbon content of 2.56 mass%. A three-stage decontamination procedure of the grinding sludge is performed, including drying, removing non-metallic abrasive particles via magnetic separation, and recovering the cooling lubricant oil by supercritical carbon dioxide extraction. Subsequently, the prepared grinding metal chips are densified by a novel energy efficient short-time sintering technique called electric discharge sintering. The carbon content of the sludge could be reduced to 1.71 mass%. However, it was found that remaining contaminations lead to a change in the alloying composition of the recycled material, which influences the tempering behavior. Increased carbon and silicon levels promoted a high retained austenite fraction after quenching of more than 67 vol%. By adopting the heat treatment, the hardness of the recycled samples could be adjusted to a level similar to that of the cast reference material in quenched and tempered condition. Reducing the retained austenite content to 2.3% by tempering led to a hardness of roughly 700 HV1.However, the recycled material showed less than 40% of the compressive strength of the cast reference material. On the one hand, the lower compressive strength can be attributed to the inadequate removal of oxidic abrasive particles during the recycling process and their poor integration into the metal matrix of the compacted specimens. In addition, oxidized layers on the chip surfaces counteract metallurgical bonding between the chips during electric discharge sintering.

Micro-Three-Coil Sensor with Dual Excitation Signals Use Asymmetric Magnetic Fields to Distinguish between Non-Ferrous Metals.

Intelligent operation and maintenance technology for vessels can ensure the safety of the entire system, especially for the development of intelligent and unmanned marine technology. The material properties of metal abrasive particles in oil could demonstrate the wear areas of the marine mechanical system because different components consist of different materials. However, most sensors can only roughly separate metallic contaminants into ferromagnetic and non-ferromagnetic particles but cannot differentiate them in greater detail. A micro-three-coil sensor is designed in this paper; the device applies different excitation signals to two excitation coils to differentiate materials, based on the different effects of different material particles in the asymmetric magnetic field. Therefore, a particle's material can be judged by the shape of the induction electromotive force output signal from the induction coil, while the particle size can be judged by the amplitude of the signal. Experimental results show that the material differentiation of four different types of particles can be achieved, namely, of aluminum, iron, 304 stainless steel, and carbon steel. This newly designed sensor provides a new research prospect for the realization of an inductive detection method to distinguish non-ferrous metals and a reference for the subsequent detection of metal contaminants in oil and other liquids.

A Review on Aluminum Matrix Composites Synthesized by FSP

AbstractSurface modification has been emerged out as a novel value addition process to increase the mechanical as well as tribological execution of the engineering materials in the previous decade. Friction stir processing (FSP) has been one of the best and most recent technologies for improving the surface properties of work material. The current study explores a critical review of the fabrication of aluminum matrix composite by incorporating the abrasive type particles through FSP and analyzing the improved mechanical, thermal, and tribological characteristics of the fabricated composite materials. The study will pave the way for opportunities related to surface modification by FSP.

Study on optimization of surface processing technology of silicon nitride bearing ring

Based on the difficult machining characteristics of silicon nitride materials, this manuscript focuses on optimizing the precision machining process of silicon nitride bearing components and improving the machining efficiency and quality of silicon nitride bearing components. Firstly, the mechanism of crack formation and propagation in hard and brittle materials under the action of abrasive particles is discussed in this paper, and based on this, a kinematic model of single abrasive grain cutting on hard and brittle materials is established. The effect of workpiece linear velocity, grinding wheel linear velocity, grinding wheel oscillation velocity and feed velocity on inner surface roughness of Si3N4 ring was discussed through grinding test. The experimental results show that the surface roughness can reach about Ra0.20 ∼Ra0.33 μm through a large number of grinding experiments by adjusting the combination of process parameters μm. On this basis, use the optimized process parameters calculated by the surface quality prediction model constructed in this manuscript to conduct grinding test again, and the surface roughness value reaches about Ra0.19 ∼Ra0.23 μm. The purpose of optimizing the process parameters is realized. Finally, the surface roughness can be further reduced and maintained at Ra0.05 ∼Ra0.06 μm by further superfinishing the surface after the process optimization with an oilstone. The research work of this manuscript realized the optimization of precision machining process of silicon nitride bearing ring and the rapid optimization of machining process through the established prediction model, which improved the precision machining efficiency of ceramic bearing components. Through the study of this manuscript, a process route of controllable processing of inner surface quality of Si3N4 ring is formed, from preliminary selection of process parameters by optimization model to precision grinding and then to ultra-finishing of whetstone, which provides theoretical reference for efficient and precise manufacturing of practical bearing components.