丁灿灿,赵敏丹,李昭东,曹燕光,隋凤利,张可,王瑞珍,雍岐龙

• 1:安徽工业大学冶金工程学院
• 2:钢铁研究总院工程用钢研究所
• 3:燕山大学材料科学与工程学院

摘要(Abstract)：

利用扫描电镜(SEM)和透射电镜(TEM)研究了淬火温度对高铁车轴用钢显微组织和力学性能的影响。结果表明:随着淬火温度的升高,抗拉强度和规定塑性延伸强度先快速增大后缓慢减小,塑性变化不明显,冲击吸收能量持续下降,同时试验钢原始奥氏体晶粒长大,马氏体板条束(Packet)长大,淬火温度升高到900℃后晶粒迅速粗化,后续回火碳化物有所细化。在淬火温度为850℃时(675℃回火)试验钢具有最佳的综合性能:抗拉强度为796 MPa,规定塑性延伸强度为677 MPa,伸长率为24.5%, 25℃和-40℃的冲击吸收能量(A_(KU2),5 mm缺口)分别为82 J和72 J。

关键词(KeyWords)： 淬火温度;碳化物;原始奥氏体晶粒

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2017YFB0304600);; 国家重点研发计划课题(2017YFB0304601)

作者(Author): 丁灿灿,赵敏丹,李昭东,曹燕光,隋凤利,张可,王瑞珍,雍岐龙

DOI: 10.13289/j.issn.1009-6264.2018-0311

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