摘要
针对刀具如农用碎草刀、灭茬刀、豆浆机刀片和谷粒粉碎刀等在使用过程中会逐渐钝化、不能自锐的难题,在65Mn表面钎涂Ni基和WC的混合粉末制作刀刃单面涂层的刀具,通过不同的热处理方法改变基体组织,调节刀刃两侧的耐磨性差,研究单面涂层刀具的自锐性。测量砂砾磨损测试(100 h)后刃部曲率,分别为500μm,120μm,147μm。结合磨损量分析400℃回火处理的刀具在耐磨性、自锐性和使用寿命三个方面的综合性能优越,提高刀具的使用寿命。
Tools such as agricultural grass cutter,stubble blade,soymilk blade and grain crushing knife would get passivated gradually during using and could not self-sharpen.In order to resolve these problems,the mixed Ni-based alloy and WC powder was brazed on the 65Mn steel surface to make the single-sided coating of tool.To ensure that the single-sided coating tool can self-sharpen,different heat treatments were used to change the matrix microstructure and regulate the both sides wear resistance of the tool.After 100-hours-grinding tests,the edge curvatures of the samples treated by normalization,quenching and tempering are 500μm,120μm,147μm,respectively.The tool after 400℃tempering has excellent wear resistance,self-sharpening,so it can significantly improve the service life of the tool.
出处
《焊接》
北大核心
2017年第8期10-13,共4页
Welding & Joining
基金
山东省自然科学基金资助项目(ZR2016EEM41
ZR2017MEE076)
关键词
碳化钨
表面钎涂
自锐性
使用寿命
tungsten carbide
single-side brazed coating
self-sharpening
service life
