Study on Mechanisms of Abrasive Wear of Vanadium Carbide Layer Coated on Die Steel Surface with High Temperature Molten Salt Bath

• Main Authors: Yu, Tai-Hang, 游岱恆
• Other Authors: Lee, Rong-Tsong
• Format: Others
• Language: zh-TW
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/71065329919100917638

碩士 === 國立中山大學 === 機械工程研究所 === 83 === 　　In this study, the effects of the substrate material and thickness of coating on the abrasive wear of the vanadium carbide layer coated on four kinds of cold die steels surface are investigated by using of hte pin-on-ring abrasive wear tester. Results indicate that the kind of vanadium carbide is only influenced by the additive in the salt bath. Moreover, at the high temperature reaction, the alloy elements close to the surface also would diffuse into the vanadium carbide layer. These alloy elements all concentrate on the area between the thickness of 2μm of coating layer and substrate, so for the specimen which bhickness of coating is more than 2μm, there is no influence on the wear. The phenomenon of vacancy in the vanadium carbide layer exist for all substrate. SK2 material which growth rate of carbide layer is faster than ther other three show the more obvious vacancy. In the wear test, the specimem of ASP23 show least weight loss than the others. From the observation of wear scar by SEM, the vacancy in the ocating would lead to more wear, and reduce the antiwear ability of coating.