王伟,崔洪芝,王泽宁,孙金全,李保民

• 1:山东科技大学材料科学与工程学院
• 2:山东博特精工股份有限公司

摘要(Abstract)：

通过对50Cr Mo4(德国)滚珠丝杠钢表面感应淬火,低温下回火处理,分析了淬火硬化层的物相、显微组织、断口形态、显微硬度等,计算了淬硬层残留奥氏体含量,探讨了在往复直线干摩擦条件下及不同载荷条件下的磨损特性。结果表明,感应淬火处理后,50Cr Mo4钢淬硬层的硬度由250 HV提高到700 HV,淬硬层组织主要为细小的回火马氏体,从表层到心部的断口形态分别为沿晶断裂、韧窝+穿晶混合断裂,韧性断裂。随着磨损载荷的增大,材料的摩擦系数逐渐降低。低载荷下材料磨损表面存在明显的犁沟,磨损机制为磨粒磨损;随着载荷的增加,磨损表面开始出现剥落凹坑,且剥落凹坑的数量增多;高载荷下磨损表面存在犁沟和明显的剥落凹坑,磨损机制为磨粒磨损和剥层磨损。

关键词(KeyWords)： 感应淬火;马氏体;磨损;滚珠丝杠

Abstract:

Keywords:

基金项目(Foundation): 山东省“泰山学者”计划(ts20110828);; 工信部“高档数控机床与基础制造装备”科技重大专项(2011ZX04014-031)

作者(Author): 王伟,崔洪芝,王泽宁,孙金全,李保民

DOI: 10.13289/j.issn.1009-6264.2015.07.011

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