摘要
采用等离子喷涂方法对机械齿轮轴进行了表面喷涂修复处理,研究了喷涂电压对涂层截面形貌、涂层物相和摩擦磨损性能的影响。结果表明,机械齿轮轴基材的组织为回火索氏体和极少量铁素体,不同喷涂电压下的涂层相组成均为WC、W_2C和Co_xW_yC_z相。随着喷涂电压的升高,喷涂涂层中W_2C相的含量相对升高,WC相的含量有所降低。当喷涂电压为50 V时,机械齿轮轴表面喷涂涂层的耐磨性能最好,这主要与涂层的孔隙较少且未发生明显脱碳有关。
The surface coating of the mechanical gear shaft was sprayed by plasma spraying, and the effect of coating voltage on the morphology of the coating, the phase and the friiction and wear properties of the coating were studied. The results show that the microstmcture of mechanical gear shaft is composing of tempered sorbite and a very small amount of ferrite. The phase compositions of coatings with different spraying voltage are WC, W2C and CoxWyC29, respectively. With the increase of spray voltage, the content of W2C phase in spray coating will be relatively increased, but the content of the WC would be reduced. When the spray voltage is 50 V, the wear resistance of mechanical gear shaft surface spray coating is the best. This is mainly related to the less pore and did not occur obvious decarburization.
作者
唐元继
段金辉
TANG Yuanji;DUAN Jihui(Department of Guangxi Career Technical,Guangxi Modem Career Technical College,Hechi 547000,China;School of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,China;SAIC GM Wuling Automobile Co.,Ltd.,Liuzhou 54500,China)
出处
《铸造技术》
CAS
2018年第8期1839-1841,1846,共4页
Foundry Technology
