赵炜,孙志伟,刘志盼,杨小代,郝露菡

• 1:燕山大学国家冷轧板带装备及工艺工程技术研究中心
• 2:燕山大学机械工程学院基础实验中心

摘要(Abstract)：

采用扫描电镜(SEM)和X射线衍射(XRD)和单轴拉伸实验等研究了自主设计的"预淬火+双相区退火"热处理工艺对成分为0.15C-5Mn的中锰钢显微组织和力学性能的影响。结果表明:随着退火温度的升高,实验钢抗拉强度逐渐升高,屈服强度逐渐降低,伸长率和强塑积先升后降,此结果与相变诱导塑性(TRIP)效应有关;随着退火时间的延长,实验钢抗拉强度先增后降,屈服强度逐渐降低,伸长率和强塑积先增后降;当热处理工艺为"800℃保温30 min水淬+655℃退火4 h空冷"时,实验钢可以获得最佳组织和力学性能,此时其残留奥氏体的体积分数为25%,抗拉强度为1250 MPa,伸长率为37%,强塑积达到46 GPa·%。实验钢的高强度和高塑性是由超细晶组织和TRIP效应共同决定的。

关键词(KeyWords)： 中锰钢;双相区退火;组织和力学性能;强塑积

Abstract:

Keywords:

基金项目(Foundation): 河北省自然科学基金——钢铁联合研究基金资助项目(E2016203485);; 国家冷轧板带装备及工艺工程技术研究中心开放课题资助项目(NECSR-201307);; 燕山大学博士基金项目(B754)

作者(Author): 赵炜,孙志伟,刘志盼,杨小代,郝露菡

DOI: 10.13289/j.issn.1009-6264.2018-0483

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