摘要
利用等离子束对灰铸铁进行表面合金化强化处理。采用扫描电镜、X射线衍射、硬度试验和磨损试验等分析了经合金化处理灰铸铁的组织和性能。结果表明,经合金化处理的灰铸铁表面石墨相完全消失,合金化层的显微组织主要是枝晶结构,硬度最高值出现在次表层,平均硬度高达1092HV0.1。由于合金化层组织均匀细密,合金化层的耐磨性比基体高4倍,耐蚀性比基体高72.5%。
The gray iron was case alloyed thereby strengthened by using a plasma beam technology, and subsequently was subjected to mierostructural SEM survey, XRD, hardness measurements and wear tests. The results show that the case of gray iron is completely free of graphite phase, and offers mainly dendrite structure. Furthermore, the highest hardness appears in the subsurface, and the mean case hardness is as high as 1092 HV0.1. Since the case offers uniform and fine structure, the wear resistance increases four times, and the corrosion resistance raises by 72.5% relative to the matrix.
出处
《热处理》
CAS
2013年第6期10-15,共6页
Heat Treatment
基金
2010年省部产学研合作重大项目(2010090200047)资助
关键词
灰铸铁
等离子束
显微组织
耐蚀性
耐磨性
gray iron
plasma beam
microstructure
corrosion resistance
wear resistance
