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所属单位：材料科学与技术学院

发表刊物：JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY

关键字：Plasma surface alloying Microstructure Friction and wear Wear mechanism Powder metallurgy gears

摘要：In the present paper, plasma surface alloying was implemented on powder metallurgy gears to improve its wear resistance based on double glow plasma surface metallurgy technology. A W-Mo alloy coating was obtained in the process. The morphology, microstructure and phase composition were investigated by SEM, EDS and XRD. The hardness was examined by Vickers hardness test and nanoindentation test. The tribological behavior of powder metallurgy gears before and after plasma surface alloying was evaluated on a ball-on-disc reciprocating sliding tribometer under dry sliding condition at room temperature. The results indicate that the W-Mo alloy coating is homogeneous without defects, which includes deposition layer and interdiffusion layer The average microhardness of powder metallurgy gears before and after plasma surface alloying is 145.8 HV0.1 and 344.4 HV0.1, respectively; Nano hardness of deposition layer and interdiffiision layer is 5.76 GPa, 14.35 GPa, respectively. The specific wear rate of W-Mo alloy coating is lower than original PM gears. The wear mechanism of W-Mo alloy coating is slight adhesive wear. The W-Mo alloy coating prepared by double glow plasma surface alloying technology can effectively improve wear resistance of powder metallurgy gears.

ISSN号：1450-5339

是否译文：否

发表时间：2019-01-01

合写作者：Liang, H-X,XT21349,Li, F-K,L00013,汪诗园,刘子利,张平则

通讯作者：魏东博,Liang, H-X,魏东博