陈志辉,甘晓龙,徐光,薛正良,田浩,李德胜

• 1:武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室
• 2:大冶特殊钢有限公司技术中心

摘要(Abstract)：

采用扫描电镜(SEM)、电子背散射衍射(EBSD)技术研究了等温球化退火时间对GCr15轴承钢碳化物球化程度和尺寸分布、铁素体晶粒尺寸及力学性能的影响。结果表明：当等温球化退火时间大于20 h时，实验钢的碳化物球化充分，球化率均达到95%以上，硬度为172.60～186.52 HV0.5。在等温球化退火过程中，碳化物颗粒能独立形核并呈球状长大，当等温时间为22 h时，碳化物颗粒平均尺寸最小，随着等温球化退火时间的延长，碳化物颗粒开始回溶长大。EBSD分析结果表明铁素体晶粒尺寸随着等温球化退火时间增加而缓慢增大，小角度晶界比例减少、大角度晶界比例增加。当等温时间为22 h时，实验钢的抗拉强度最高为688.94 MPa;伸长率最大为28.02%。

关键词(KeyWords)： GCr15轴承钢;等温球化退火;碳化物;晶粒尺寸;力学性能

Abstract:

Keywords:

基金项目(Foundation): 湖北省“JD”技术攻关工程项目(2023BAA019-1)

作者(Author): 陈志辉,甘晓龙,徐光,薛正良,田浩,李德胜

DOI: 10.13289/j.issn.1009-6264.2024-0192

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