陈菊芳,周金宇,孙凌燕,朱福先,王江涛,陈国炎

• 1:江苏理工学院材料工程学院
• 2:江苏理工学院机械工程学院

摘要(Abstract)：

为提高40Cr钢的耐磨性和疲劳性能,利用YLS-4000型光纤激光器对40Cr钢表面进行淬火强化。利用扫描电镜、显微硬度计等对淬硬层组织和硬度进行了分析,采用X-350A型应力测定仪对淬硬层的残余应力和残留奥氏体进行了测试。结果表明:40Cr钢表面激光淬硬层主要由板条状马氏体组成,马氏体的体积分数在95%以上,马氏体晶粒较基体组织有明显细化;淬硬表层的平均显微硬度(710.5 HV)显著高于基体(235.5 HV),随着到表面距离的增加硬度值逐渐降低至基体硬度;淬硬层表面产生较大的残余压应力,压应力值高达230 MPa以上。

关键词(KeyWords)： 激光处理;激光淬火;40Cr钢;强化效果;残余应力

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51275221,51105181);; 常州市科技项目(CJ20159051,CE20130034);; 江苏省高校自然科学基金(12KJB460002)

作者(Author): 陈菊芳,周金宇,孙凌燕,朱福先,王江涛,陈国炎

DOI: 10.13289/j.issn.1009-6264.2015.11.017

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