高杰维,戴光泽,梁树林,李恒奎,赵君文,黄兴民,韩靖

• 1:西南交通大学牵引动力国家重点实验室
• 2:西南交通大学材料科学与工程学院
• 3:中车青岛四方机车车辆股份有限公司

摘要(Abstract)：

对S38C中碳钢进行表面感应淬火+低温回火处理,对处理后的试样显微组织、截面硬度分布和抗拉强度进行表征,通过疲劳试验和断口形貌分析评价压痕对先压痕后淬火和先淬火后压痕两类试样疲劳性能的影响。结果表明,试样有效淬硬层厚度为700μm,淬硬层有未转变的铁素体存在,最大硬度480 HV0.2在亚表面200μm处。淬火试样抗拉强度比基体材料高140MPa,断裂伸长率只有基体的一半。当压痕较小时,两类试样的疲劳强度没有差异,当试样压痕较大时,淬火后压痕疲劳断面有微裂纹,造成这类试样疲劳强度迅速下降,表面强化材料表面冲击损伤不能简单的当作一般缺陷处理。

关键词(KeyWords)： 表面感应淬火;压痕;疲劳强度;中碳钢

Abstract:

Keywords:

基金项目(Foundation): 材料成型与模具技术国家重点实验室开放课题研究基金(P2015-10);; 四川省科技计划项目(2014GZ0004—3)

作者(Author): 高杰维,戴光泽,梁树林,李恒奎,赵君文,黄兴民,韩靖

DOI: 10.13289/j.issn.1009-6264.2016.09.032

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