Critical Scratch Load Research Articles

Influence of droplet-free ta-C coatings and lubrication conditions on tribological performance and mechanical characteristics of WC−Co

Cemented carbide (WC−Co) tools suffer from surface abrasion, limiting their performance. This study explores droplet-free tetrahedral amorphous carbon (ta-C) coatings deposited via arc ion plating as a solution. The coatings possess a dense, sp3-rich structure, leading to a remarkable hardness of 60 GPa compared to 37 GPa of WC−Co, and strong adhesion with a critical scratch load of 41 N. Tribological tests confirm their effectiveness. Dry sliding tests show reduced wear and lower CoF (0.123) compared to uncoated tools (0.159). Notably, water-soluble lubricants yielded the best performance (lowest CoF: 0.092, superior wear resistance), while water and mineral oil also improved performance.

Effect of graphite addition on microstructure and properties of TiC–Ti5Si3–SiC composite coatings reacted from Ti–SiC-graphite powders

A TiC–Ti5Si3–SiC composite coating was prepared using atmospheric plasma spraying by in-situ reaction of raw agglomerated Ti–SiC-graphite powders. The effect of graphite content on the reaction mechanism, microstructure, and properties of plasma sprayed TiC–Ti5Si3–SiC coatings was studied. The results indicated that, with the increase of graphite content, Ti and C preferentially reacted and the reaction feasibility between Ti and SiC reduced. The content of TiC in the reaction products and unreacted SiC increased, while the content of Ti5Si3 decreased. Among them, the TiC–Ti5Si3–SiC coating prepared using Ti–SiC-graphite powders with a molar ratio of 3:1:1 exhibits excellent comprehensive properties, dense microstructure (porosity: 11.76 %), highest hardness (1132 HV0.2), high bonding strength (scratch critical load: ∼44 N), and optimal wear resistance with a wear loss weight of ∼5 × 10 −4 g.

Tool Wear Of (Al, Cr, W) N-Coatings on Cemented Carbide Tools Prepared by Arc Ion Plating in Dry Cutting of Sintered Steel

To improve both the critical scratch load and micro-hardness of (Al, Cr) N coating film, (Al, Cr, W) N coating film was developed. In this study, to clarify the tool wear of the coated tool in the cutting of sintered steel using four types of (Al, Cr, W) N coated tools, the wear progress and the wear mechanism of the coating film were investigated. By using two types of the (Al, Cr, W)-target and three types of bias voltage, the (Al, Cr, W) N coating film was deposited on cemented carbide ISO K10. To clarify the wear mechanism of the (Al, Cr, W) N coating films, scanning electron microscope (SEM) observation and Energy Dispersive X-ray spectrometry (EDS) mapping analysis of the abraded coating film were performed. The cutting conditions were a cutting speed of 3.33 m/s, feed rate of 0.1 mm/rev, and cutting depth of 0.1 mm. The following results were obtained: (1) The wear progress of the (Al64, Cr28, W8) N coated tool was slower than that of the (Al60, Cr25, W15) N coated tool. (2) When nitride coating films were deposited on the cemented carbide ISO K10 with a bias voltage of -80 V, -150 V, or -300 V using the (Al64, Cr28, W8)-target, the wear progress of the (Al64, Cr28, W8) N coated tool with a bias voltage of -80 V was the slowest.

TOOL WEAR OF (AL, CR, W) N-COATINGS ON CEMENTED CARBIDE TOOLS PREPARED BY ARC ION PLATING IN DRY CUTTING OF SINTERED STEEL

To improve both the critical scratch load and micro-hardness of (Al, Cr) N coating film, (Al, Cr, W) N coating film was developed. In this study, to clarify the tool wear of the coated tool in the cutting of sintered steel using four types of (Al, Cr, W) N coated tools, the wear progress and the wear mechanism of the coating film were investigated. By using two types of the (Al, Cr, W)-target and three types of bias voltage, the (Al, Cr, W) N coating film was deposited on cemented carbide ISO K10. To clarify the wear mechanism of the (Al, Cr, W) N coating films, scanning electron microscope (SEM) observation and Energy Dispersive X-ray spectrometry (EDS) mapping analysis of the abraded coating film were performed. The cutting conditions were a cutting speed of 3.33 m/s, feed rate of 0.1 mm/rev, and cutting depth of 0.1 mm. The following results were obtained: (1) The wear progress of the (Al64, Cr28, W8) N coated tool was slower than that of the (Al60, Cr25, W15) N coated tool. (2) When nitride coating films were deposited on the cemented carbide ISO K10 with a bias voltage of -80 V, -150 V, or -300 V using the (Al64, Cr28, W8)-target, the wear progress of the (Al64, Cr28, W8) N coated tool with a bias voltage of -80 V was the slowest.

Structure and mechanical properties of toughening B1 Ta1-xMoxN films with various Mo contents

In this paper, Ta1-xMoxN films with varying Mo contents were deposited by reactive magnetrons sputter in mixed Ar/N2 atmospheres at 350 °C. It's discovered that Ta1-xMoxN films at x = 0.13–0.86 maintains a NaCl type (B1) structure and a strong (200) preferred orientation. Besides, as Mo contents grow, the residual stress of films is attenuated from −3.24 GPa to −1.49 GPa, and the hardness of films first increases and then decreases. Specifically, with a nearly balanced Ta and Mo content (x = 0.57), the Ta1-xMoxN film exhibits higher hardness (39.5 ± 1.2 GPa) and elastic modulus (359.3 ± 8.8 GPa), up by 53.1% and 26.8% compared with TaN, higher fracture toughness, scratch critical load (91.5 N) and elasticity (76.7%). The Ta1-xMoxN film with x = 0.57 obtains lower coefficient of friction (0.417), and higher wear resistance (wear rate: 1.9 × 10−7 mm3/N*m). In addition, the density of states (DOS) in XPS valence band spectra from Ta1-xMoxN films is shifted toward lower binding energy with more Mo contents. Accordingly, the stronger metallic characteristics and the solid solution strengthening effect endow the Ta1-xMoxN films at x = 0.57 with higher hardness and toughness.

High transmittance and excellent hardness TiO2‐SiO2‐Al2O3 nanocomposite thin film for anti‐scratch surface applications

AbstractIn this work, TiO2‐SiO2‐x%Al2O3 (x = 0–50) nanocomposite thin films (NCTFs) with high purity, relatively homogeneity, high transmittance, excellent hardness, and crack‐free were synthesized successfully by a spin‐coating technique. It was demonstrated that the transmittance and the hardness of TiO2‐SiO2‐x%Al2O3 NCTFs are strongly affected by the Al2O3 content. The highest transmittance of 90.9% in the visible region (400 to 800 nm) and the excellent hardness and scratch resistance with a maximum hardness value of 7 Mohs and 11.8 GPa of nanoindentation and a critical scratch load of 47.6 mN for the TiO2‐SiO2‐30%Al2O3 NCTF annealed at 500°C in the air for 3 h was achieved. A hardness enhancement mechanism was proposed and discussed in detail. The obtained results show that the fabricated TiO2‐SiO2‐Al2O3 NCTFs have a great potential for anti‐scratch resistance surface applications.

Improved tribological properties of stainless steel by high temperature-alloyed tantalum gradient layer

Tantalum (Ta) gradient transitional layer, which was prepared by double-glow plasma surface alloying technology, was designed to improve the tribological properties of AISI 304 stainless steel. The microstructure, morphology, mechanical and tribological properties of surface modified stainless steel were characterized and analyzed. The results showed that the modified Ta coating can improve the surface roughness and tribological properties of the AISI 304 stainless steel greatly. Furthermore, β-Ta is in the majority in gradient transitional layer and it show high critical scratch load. The thickness of Ta coating, surface roughness, load bearing capacity, friction coefficient and wear rate of Ta/AISI 304 increased first and then decreased. Especially, the sample with Ta alloyed time of 30 min show excellent tribological properties, which were closely related with high critical load, low surface roughness, and the phase transformation from metastable β-Ta to stable cubic α-Ta in less oxygen conditions at the role of frictional heat. Furthermore, there are α-Ta nanoparticles with assembled into nanoribbons on the counterface decreasing the friction and wear further. The present study provides useful guidance for the modification of AISI304 and a new prospect on the transition from β-Ta to α-Ta during the friction.

Nano-Scale Residual Stress Profiling in Thin Multilayer Films with Non-Equibiaxial Stress State.

Silver-based low-emissivity (low-E) coatings are applied on architectural glazing to cost-effectively reduce heat losses, as they generally consist of dielectric/Ag/dielectric multilayer stacks, where the thin Ag layer reflects long- wavelength infrared (IR), while the dielectric layers both protect the Ag and act as an anti-reflective barrier. The architecture of the multilayer stack influences its mechanical properties and it is strongly dependent on the residual stress distribution in the stack. Residual stress evaluation by combining focused ion beam (FIB) milling and digital image correlation (DIC), using the micro-ring core configuration (FIB-DIC), offers micron-scale lateral resolution and provides information about the residual stress variation with depth, i.e., it allows depth profiling for both equibiaxial and non-equibiaxial stress distributions and hence can be effectively used to characterize low-E coatings. In this work, we propose an innovative approach to improve the depth resolution and surface sensitivity for residual stress depth profiling in the case of ultra-thin as-deposited and post-deposition annealed Si3N4/Ag/ZnO low-E coatings, by considering different fractions of area for DIC strain analysis and accordingly developing a unique influence function to maintain the sensitivity of the technique at is maximum during the calculation. Residual stress measurements performed using this novel FIB-DIC approach revealed that the individual Si3N4/ZnO layers in the multilayer stack are under different amounts of compressive stresses. The magnitude and orientation of these stresses changes significantly after heat treatment and provides a clear explanation for the observed differences in terms of scratch critical load. The results show that the proposed FIB-DIC combined-areas approach is a unique method for accurately probing non-equibiaxial residual stresses with nano-scale resolution in thin films, including multilayers.

Tool wear of AlCrW-based-coatings on cemented carbide tools prepared by arc ion plating in dry cutting of alloy steel AISI 5120H

To improve both the critical scratch load and micro-hardness of (Al, Cr) N coating film, (Al, Cr, W)-based coating film was developed. In this study, to clarify the tool wear of the (Al,Cr,W)-based coated tool in the cutting of alloy steel AISI 5120H, the wear progress and wear mechanism of the coating film in the cutting of alloy steel AISI 5120H using six types of (Al,Cr,W)-based coated tools were investigated. The cutting conditions were a cutting speed of 5.00 m/s, feed rate of 0.25 mm/rev and cutting depth of 0.1 mm. The following results were obtained: 1) The wear progress of the (Al64,Cr28,W8)N-coated tool was slower than that of the (Al60,Cr25,W15)N-coated tool. 2) When a (Al64,Cr28,W8)-target was used to deposit a cemented carbide with a bias voltage of -150 V, the wear progress of the (Al64,Cr28,W8)N coated tool was slightly slower than that of the (Al64,Cr28,W8)(C,N)- or the (Al64,Cr28,W8)C-coated tool. 3) The wear progress of the (Al64,Cr28,W8)N coated tool with a bias voltage of -80 V was the slowest.

Wear Mechanism of Multilayer AlCrWN/AlCrWSiN-coatings on Cemented Carbide Tools Prepared by Arc Ion Plating in Dry Cutting of Hardened Sintered Steel

In this study, to clarify the wear mechanism of the multilayer AlCrWN/AlCrWSiN-coated tool in cutting of hardened sintered steel, the rate of wear in the cutting of hardened sintered steel using three types of coated tools was investigated. The Type I tool had a single layer (Al60, Cr25, W15)N coating film, the Type II tool had a single layer (Al53, Cr23, W14, Si10)N coating film and the Type III tool had a multilayer (Al60, Cr25, W15)N/(Al53, Cr23, W14, Si10)N-coating film. Scanning electron microscope (SEM) observation and electron dispersive X-ray spectrometry (EDS) mapping analysis of the abraded surface of the coating film were performed. The following results were obtained: 1) The wear rate of the Type III tool was the slowest. 2) The area of the worn surface on the rake face “S” and the contact length between the rake face and the chip “D” were measured. Comparing the three types of coated tools, both the “S” and the “D” of Type I tool were the smallest, and those of Type II tool were the largest. 3) The main wear mechanism of Type II and Type III tool showed abrasive wear. However, the main wear mechanism of the Type I tool was both abrasive wear and adhesion wear. 4) The critical scratch load of the Type I tool, 81 N, was lower than that of the Type II or the Type III tool, over 130 N. Therefore, comparing the Type I and Type III tools, due to the wear mechanism of the Type 1 tool being both abrasive wear and adhesion wear, the wear rate of the Type I tool, which has the lower critical scratch load, was slower.

Optimization of the deposition parameters of Ni-20Cr thin films on thermally sprayed Al2O3 for sensor application

Ni-Cr (80–20 at.-%) thin films were synthesized by means of DC magnetron sputtering on thermally sprayed Al2O3 insolating coatings. In view of the application as a thin-film thermocouple, the ceramic layer provides an electrical as well a thermal insulation. The thin film must feature a good adhesion as well as a good electrical conductivity to be suitable as a thin-film thermocouple. Design of Experiments was utilized to determine if deposition parameters including the bias-voltage, heating power, and chamber pressure have a significant influence regarding critical scratch load, hardness to Young's modulus ratio, and electrical resistance. It was found out that the bias-voltage is the most important influencing factor. In order to extract the significant parameters, the morphology and topography were analyzed by means of SEM. The structural properties were obtained by means of XRD on an atomic level, using synchrotron radiation. Mechanical properties, such as the hardness and Young's modulus, as well the scratch load were evaluated using nanoindentation and a scratch-tester. To verify the findings, an optimized thin film was deposited, which showed an increased layer adhesion and a significantly lower electrical resistance.

Influence of substrate material and its plasma pretreatment on adhesion and properties of WC/a-C:H nanocomposite coatings deposited at low temperature

WC/a-C:H tribological nanocomposite coatings were deposited by reactive magnetron sputtering of tungsten carbide targets in acetylene atmosphere on substrates of various materials – cemented carbide and three types of steel. All the substrates were pretreated by various magnetron plasma-based techniques to evaluate their efficiency in promotion of coating adhesion. All the studied processes took place at temperatures lower than 180°C. The structure of the WC/a-C:H coatings and their mechanical properties did not depend on the pretreatment technique nor the type of substrate material. On the other hand, the surface roughness of the substrate and the deposited coating can be affected by the intensity and duration of the pretreatment process. The adhesion of the coatings is significantly dependent on the substrate material and the particular plasma pretreatment process, as well as their combination. HiPIMS pretreatment processes with lower duty cycle at higher substrate bias voltage result in excellent adhesion with scratch critical load values higher than 130N. Further, the substrate-target distance influences the efficiency of the pretreatment process and also partly affects the performance of the coatings. It is concluded that magnetron plasma-based pretreatment and deposition processes might involve potential practical problems in industrial coating of various objects in the same process batch. This is particularly connected with their shape and their composition.

Tool Wear of Multi-Layer AlCrWN/AlCrWSiN-Coated Cemented Carbide in Cutting Hardened Sintered Steel

In order to clarify the effectiveness of the multi-layer AlCrWN/AlCrWSiN-coated cemented carbide tool, the wear progress was investigated in cutting hardened sintered steel using three types of coated tool. Namely, Tool I had the dual-layer (Al60,Cr25,W15)(C,N)/(Al53,Cr23,W14,Si10)(C,N)-coating film, Tool II had the multi-layer (Al60,Cr25,W15)(C,N)/(Al53,Cr23,W14,Si10)(C,N)-coating film and Tool III had the multi-layer (Al60,Cr25,W15)N/(Al53,Cr23,W14,Si10)N-coating film. The following results were obtained: (1) The main tool failure of the three types of coated tools were the flank wear within the maximum value of the flank wear width of 0.2 mm. (2) The critical scratch load of the three types of coated tools was 130 N or more. (3) The micro-hardness of Tool III 3000 HV0.25N was the highest among the three types of coated tools. (4) The mean value of the friction coefficient of the (Al53,Cr23,W14,Si10)N coating film, 0.21, was approximately half that of the (Al53,Cr23,W14,Si10)(C,N) coating film, 0.41. (5) In the case of the higher cutting speed, the wear progress of the multi-layer coating system was slower than that of the dual-layer coating system. (6) In the case of the cutting hardened sintered steel using the multi-layer coated tool, the wear progress of the Type III coated tool was slower than that of the Type II coated tool.

Tool Wear of Aluminum/Chromium/Tungsten/Silicon-Based-Coated End Mill Cutters in Milling Hardened Steel

In turning hardened steel, polycrystalline cubic boron nitride (cBN) compacts are widely used, due to their high hardness and high thermal conductivity. However, in milling hardened steel, fracture of cBN cutting tools readily occurs because they have poor fracture toughness. Therefore, coated cemented carbide tools, which have good fracture toughness and wear resistance, are generally and widely used. In this study, hardened steel (ASTM D2, JIS SKD11, 60HRC) was milled with three physical vapor deposition coated cemented carbide end mill cutters in order to determine effective tool materials for milling hardened steel. The coating films used were two types of aluminum/chromium/tungsten/silicon-based-coating films and (Ti,Al)N-coating film. The two types of aluminum/chromium/tungsten/silicon-based-coating films are a new type of coating film, and the Type I and Type II coating film was a two-layered and multi-layered structure, respectively. The following results were obtained: (1) In milling hardened steel at a cutting speed of 2.5 m/s, Type II coating film was the best coating material among the three types of coated film. Type I coating film was superior to (Ti,Al)N-coating film. (2) The critical scratch load of both Type I and Type II of over 130 N became larger than that of the (Ti,Al)N-coating film of 65 N. (3) The multi-layered structure is expected to improve the tool life.

Processing and characterization of Cf/ZrB2-SiC-ZrC composites produced at moderate pressure and temperature

Cf/ZrB2-SiC/ZrC composites were prepared by hot pressing of carbon fibre (Cf) cloth, ZrB2, polycarbosilane (PCS) and Zr metal at 4MPa and 1200°C. The bulk density of Cf/ZrB2-SiC/ZrC composite was improved from 2.29g/cc to 2.69g/cc as a function of PCS infiltration cycles. Microstructural investigation revealed that the SiC encapsulates the Cf and also present at grain boundaries. This resulted in enhanced scratch critical load from 1500 to 3200 mN and flexural strength from 30 to 100MPa. Further, oxyacetylene flame at 2100°C for a shorter duration of 20–60s showed a decrease in the mass ablation rate from 0.0062 to 0.0028g/s. This was due to the formation of protective Zr-Si-O layer and confirmed by elemental analysis.

Influence of diamond surface chemical states on the adhesion strength between Y2O3 film and diamond substrate

The Y2O3 film deposited on chemical oxidation diamond substrate exhibited high adhesion strength and survived thermal shock at 800°C. Oxygenated functionalization of the diamond surface had been successfully achieved via wet chemical oxidation with the increase in O/C atomic ratio from 0.04 to 0.13. The surface energy of the diamond substrate was significantly improved from 35.7mJ/m2 to 61.4mJ/m2. After depositing Y2O3 film on the diamond substrate, the COY bonds were observed at the interface. In addition, the quantity of COY bonds significantly increased with the chemisorbed oxygen concentration increasing. The critical scratch load of Y2O3 film deposited on chemical oxidation diamond substrate increased from 22.5N to 34.1N. Furthermore, the Y2O3 film deposited on chemical oxidation diamond substrate can withstand harsh thermal change and protect the diamond substrate from elevated temperature oxidation in atmospheric air without showing degradation of infrared optical performance.

Tool Wear of Aluminum/Chromium/Tungsten-Based-Coated Cemented Carbide in Cutting Hardened Steel

An aluminum/chromium based coating film, called (Al,Cr)N coating film, has been developed. This coating film has a slightly more inferior critical scratch load and micro-hardness. Therefore, to improve both the scratch strength and micro-hardness of the (Al,Cr)N coating film, the cathode material of an alumi-num/chromium/tungsten target was used in adding the tungsten (W) to the cathode material of the alumi-num/chromium target. To clarify the effectiveness of the aluminum/chromium/tungsten-based coating film, we measured the thickness, micro-hardness and critical scratch strength of aluminum/chromium/tungsten-based coating film formed on the surface of a substrate of cemented carbide ISO K10 formed by the arc ion plating process. The hardened steel ASTM D2 was turned with the (Al,Cr,W)N, (Al,Cr,W)(C,N), (Al,Cr)N and the (Ti,Al)N coated cemented carbide tools. The tool wear of the coated cemented carbide tools was ex-perimentally investigated. The following results were obtained: (1) The micro-hardness of the (Al,Cr,W)N or (Al,Cr,W)(C,N), (Al,Cr)N coating film was 3110 HV0.25Nor 3080 HV0.25N, respectively. (2) The critical scratch load of the (Al,Cr,W)(C,N) coating film was 123 N, which was much higher than that of the (Al,Cr)N or (Ti,Al)N coating film. (3) In cutting the hardened steel using (Al,Cr,W)(C,N) and (Ti,Al)N coated carbide tools, the wear progress of the (Al,Cr,W)(C,N) coated carbide tool was almost equivalent to that of the (Ti,Al)N coated carbide tool. The above results clarify that the aluminum/chromium/tungsten-based coating film, which is a new type of coating film, has both high hardness and good adhesive strength, and can be used as a coating film of WC-Co cemented carbide cutting tools.

Influence of pulsed substrate bias on the structure and properties of Ti–Al–N films deposited by cathodic vacuum arc

Ti–Al–N films were deposited by cathodic vacuum arc (CVA) technique in N2 atmosphere with different pulsed substrate bias. The influence of pulsed substrate bias (0 to −800V) on the deposition rate, surface morphology, crystal structure, and mechanical properties of the Ti–Al–N films were systematically investigated. Increasing pulsed bias voltage resulted in the decrease of deposition rate but the increase of surface roughness. It was found that there was a strong correlation between the pulsed bias and film structure. All the films studied in this paper were composed of TiN, AlN, and Ti–Al–N ternary phases. The grains changed from equiaxial to columnar and exhibited preferred orientation when the pulsed bias increased. With the increase of pulsed bias voltage, the atomic ratio of Ti to Al element increased gradually, while the N to (Ti+Al) ratio decreased. The composite films present an enhanced nanohardness compared with binary TiN and ZrN films. The film deposited with pulsed bias of −200V possessed the maximum scratch critical load and nanohardness. The minimum friction coefficient with pulsed bias of −300V was obtained.

Properties of TaN Coating Film Deposited on WC-Co-Based Cemented Carbide Using Magnetron Sputter Ion Plating

Various methods of surface modification technology are available for yielding high function characteristics such as wear-resistance, lower or higher friction coefficient, corrosion-resistance and thermal-resistance on the surface of the material. Generally, the coating of a hard material like ceramic on the surface of a material is a popular surface modification technology. The physical vapor deposition (PVD) method, which is one of the coating technologies, is widely used because it can be coated at a lower treatment temperature of 470K – 870K. In cutting, e.g. turning, milling, drilling and tapping, coated cemented carbide tools, which have good fracture toughness and wear resistance, seem to be effective tool materials. In this case, the titanium based films (e.g. TiN, Ti(C,N), (Ti,Al)N) are generally used as the coating film. However, the tantalum based films (e.g. TaN, TaC) are not applied as the coating film for cutting tools because the melting point of TaC is higher than that of TiC. Moreover, it is unclear whether TaN coating film can be used as a coating film of WC-Co cemented carbide cutting tools. In this study, to clarify the effectiveness of tantalum (TaN) coating film, we measured the thickness, hardness and scratch strength (critical load measured by scratch tester) of TaN coating film formed on the surface of the substrate which was a cemented carbide ISO K10 by the magnetron sputter ion plating process. The hardened steel ASTM D2 (JIS SKD11) was turned with the TaN and the (Ti,Al)N coated cemented carbide tools. The tool wear of the TaN coated cemented carbide tool was experimentally investigated and compared with that of the (Ti,Al)N coated tool. The following results were obtained: (1) Droplets on the surface of the TaN coating film, which has the K10 substrate, were negligible. (2) The micro-hardness of TaN coating film 2510HV was higher than that of TiN coating film 2090HV, and there was little difference in hardness between the TaN 2510HV and (Ti,Al)N 2710HV. (3) The critical scratch load of TaN coating film over 130N was higher than that of TiN coating film 68N or (Ti,Al)N coating film 73N. (4) In cutting the hardened steel using TaN and (Ti,Al)N coated tools, the wear progress of the TaN coated carbide tool was almost equivalent to that of the (Ti,Al)N coated carbide tool. The above results clarify that the TaN coating film, which is a new type of coating film, has both high hardness and good adhesive strength, and can be used as a coating film of WC-Co cemented carbide cutting tools.

알루미늄 판재의 센딩조건에 따른 도장특성 평가

Researchers suggested painted coating characteristics of aluminum sheet by various sending condition. Painted coating is used to protect the surface of the blocks from the interior and exterior. It is also used to enhance the value of automobiles and ship materials. This process makes the materials surface for protection and elegance. Although analysis of the roughness and critical scratch load of painted coating is important, the effects of this material have not progressed much. In this study, the characteristics of painted coating in the other conditions of the polished aluminum sheet were investigated. The results of both various conditions and initial roughness values were almost similar to final values after painted coating.