Effect of laser power on microstructure and friction and wear properties of laser clad layer on 42CrMo steel

doi:10.13251/j.issn.0254-6051.2020.11.041

Abstract

Abstract: The wear resistance of the laser clad layer of 42CrMo steel under different laser powers was investigated by using friction and wear test, and the morphologies of the specimens before and after friction and wear were observed by using SEM and OM. The results show that the friction coefficient of 42CrMo steel substrate is larger, and severe brittle peeling is occurred after friction and wear, while the laser clad layer can improve the wear resistance of 42CrMo steel. When the laser power is 1600 W, the friction coefficient can be reduced to 0.28, and the clad layer has relatively smooth SEM surface morphologies with excellent wear resistance. Meanwhile, the clad layer microstructure is dense and mainly composed of uniform fine equiaxed grains caused by grain refinement, thereby improving the wear resistance of the clad layer.

Key words: laser cladding, cobalt-based clad layer, wear resistance, microstructure

CLC Number:

TG174.4

Han Jitai, Wu Meiping, Cui Chen. Effect of laser power on microstructure and friction and wear properties of laser clad layer on 42CrMo steel[J]. Heat Treatment of Metals, 2020, 45(11): 214-217.

References

[1]程晔锋, 程巨强, 李晴. 35SiMnMo和42CrMo钢截齿体组织及性能的比较[J]. 煤矿机械, 2019, 40(4): 79-80.
Cheng Yefeng, Cheng Juqiang, Li Qing. Comparison of microstructure and properties of 35SiMnMo and 42CrMo steel picks[J]. Coal Mining Machinery, 2019, 40(4): 79-80.
[2]杜学芸, 许金宝, 常广青, 等. 42CrMo矿用截齿强化技术的研究与探讨[J]. 热喷涂技术, 2017, 9(4): 72-76.
Du Xueyun, Xu Jinbao, Chang Guangqing, et al. Research and discussion of 42CrMo mining pick strengthening technology[J]. Thermal Spray Technology, 2017, 9(4): 72-76.
[3]马壮, 牛晓南. 截齿齿体42CrMo钢散体磨料振动磨损研究[J]. 煤矿机械, 2007(12): 43-45.
Ma Zhuang, Niu Xiaonan. Study on vibration and abrasive wear of interstitial 42CrMo steel interstitial abrasive material[J]. Coal Mining Machinery, 2007(12): 43-45.
[4]梁华, 董良, 韩光普, 等. 42CrMo表面等离子熔覆层组织与性能研究[J]. 煤矿机械, 2014, 35(3): 39-41.
Liang Hua, Dong Liang, Han Guangpu, et al. Study on microstructure and properties of plasma cladding layer on 42CrMo surface[J]. Coal Mining Machinery, 2014, 35(3): 39-41.
[5]Cui X Y, Wang C B, Kang J J. et al. Influence of the corrosion of saturated saltwater drilling fluid on the tribological behavior of HVOF WC-10Co4Cr coatings[J]. Engineering Failure Analysis, 2016, 71(2): 195-203.
[6]Gonzalez J M, Quintero F, Arellano J E. et al. Effects of interactions between solids and surfactants on the tribological properties of water-based drilling fluids[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2011, 391(1): 216-223.
[7]邓志强, 石世宏, 周斌, 等. 不等高弯曲弧形薄壁结构激光熔覆成形[J]. 中国激光, 2017, 44(9): 117-124.
Deng Zhiqiang, Shi Shihong, Zhou Bin, et al. Laser cladding forming of curved thin wall structure with unequal height[J]. China Laser, 2017, 44(9): 117-124.
[8]翟建华, 刘志杰, 张勇, 等. 内缸活塞杆的激光熔覆修复[J]. 激光与光电子学进展, 2017, 54(11): 267-274.
Zhai Jianhua, Liu Zhijie, Zhang Yong. et al. The laser cladding repair of inner cylinder piston rod[J]. Laser and Optoelectronics Progress, 2017, 54(11): 267-274.
[9]徐国建, 李春光, 郭云强, 等. 激光熔覆Stellite-6+VC混合粉末的熔覆层组织[J]. 焊接学报, 2017, 38(6): 73-78.
Xu Jianguo, Li Chunguang, Guo Yunqiang, et al. Laser cladding of the cladding layer of Stellite-6+VC mixed powder[J]. Transactions of the China Welding Institution, 2017, 38(6): 73-78.
[10]苏猛. 环形件激光熔覆再制造研究[D]. 秦皇岛: 燕山大学, 2016.
Su Meng. Research on laser cladding remanufacturing of ring parts[D]. Qinhuangdao: Yanshan University, 2016.
[11]钟晓康, 王幸福, 韩福生. 316L不锈钢表面激光熔覆Stellite-F合金层的电化学腐蚀行为[J]. 金属热处理, 2019, 44(1): 176-179.
Zhong Xiaokang, Wang Xingfu, Han Fusheng. Electrochemical corrosion behavior of Stellite-F laser cladding layer on surface of 316L stainless steel[J]. Heat Treatment of Metals, 2019, 44(1): 176-179.
[12]陈江, 刘玉兰. 激光再制造技术工程化应用[J]. 中国表面工程, 2006, 19(S1): 50-55.
Chen Jiang, Liu Yulan. Engineering application of laser remanufacturing technology[J]. China Surface Engineering, 2006, 19(S1): 50-55.
[13]Hall D S, Standish T E, Behazin M, et al. Corrosion of copper-coated used nuclear fuel containers due to oxygen trapped in a Canadian deep geological repository[J]. Corrosion Engineering, Science and Technology, 2018, 53(4): 309-315.
[14]Hocking W H, Lister D H. Corrosion of stellite-6 in lithiated and borated high-temperature water[J]. Surface and Interface Analysis, 2010, 11(1/2): 45-59.
[15]Mirzade F. Plane wave propagation in transversely isotropic laser-excited solids[J]. Physica B, 2015, 461:17-22.
[16]Davim J P, Oliveira C, Cardoso A. Predicting the geometric form of clad in laser cladding by powder using multiple regression analysis (MRA)[J]. Materials and Design, 2008, 29(2): 554-557.