口头报告Study on wear resistance of laser cladding with different cross sections
编号:41 访问权限:仅限参会人 更新:2021-07-06 15:56:57 浏览:110次

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摘要
For a long time, in actual production applications, people will cladding the coating to improve the wear resistance of the workpiece, but because the internal composition of the coating is uneven, the wear resistance life of the coating varies. High manganese steel (27SiMn) is usually used to prepare the components which works under a high load for long time.Therefore, this paper conducted research in this area. In order to improve the overall abrasion resistance of (Fe0.25Co0.25Ni0.25Cr0.125Mo0.125)xBy high-entropy alloy (HEA) coating, laser cladding was used to prepare (Fe0.25Co0.25Ni0.25Cr0.125Mo0.125)xBy high-entropy alloy (HEA) coating, the wear resistance between different sections was studied. X-ray diffraction, Vickers hardness tester, and friction and wear tester were used to analyze the phase composition, microhardness and wear resistance of the coating. After aqua regia corrosion, electron probes were used for microscopic morphology and element analysis. The experimental results show that (Fe0.25Co0.25Ni0.25Cr0.125Mo0.125)83B17 coating with the cutting process, the microhardness and friction coefficient first increase and then decrease. (Fe0.25Co0.25Ni0.25Cr0.125Mo0.125)80B20 coating with the cutting process, the microhardness gradually increases and the friction coefficient gradually decreases.The average microhardness of the laser clad B17 coating is the highest in the second splitting, reaching 495.1 HV0.2. And the average microhardness of the laser clad B20 coating is the highest in the third splitting, reaching 474.1 HV0.2. This is mainly because element segregation occurs during the laser cladding process, which makes the surface and internal wear resistance of the coating different.
关键词
laser cladding, section, friction and wear,multi-principal alloy
报告人
侯 怀志
山东科技大学 机械电子工程学院

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