摘要
使用Gleeble-3800热模拟试验机研究了中锰钢(温成形钢)和22MnB5钢(热成形钢)的微观组织、力学性能和高温拉伸性能。结果表明:与22MnB5钢相比,在获得1 500MPa级的抗拉强度时,中锰钢的加热温度可从950℃降低到800℃,钢的组织明显细化并且没有发生表面脱碳,断后伸长率从7.5%提高到10%。高温拉伸试验结果表明:中锰钢比22MnB5钢具有更高的延伸率和硬化指数,可以减小成形过程中局部减薄过高导致的样件破裂。
The microstructure,mechanical properties and high temperature tensile properties of medium-Mn steel（warm stamping steel）and 22MnB5steel（hot stamping steel）were studied by Gleeble-3800 hot simulation tester.The results show that comparing with 22MnB5 steel,the heating temperature of medium-Mn steel reduces from950℃to 800℃for obtaining the tensile strength of 1 500 MPa,and finer microstructure can be obtained in medium-Mn steel without surface decarburization;the total elongation reaches 10% which is higher than that of hot stamping steel（7.5%）.The high temperature tensile tests results show that the medium-Mn steel has higher elongation and hardening index value,which can reduce the broken induced by local necking during high temperature stamping process.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2016年第11期46-50,共5页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(51571048)
国家"973"计划资助项目(2010CB630803)
关键词
第三代汽车钢
中锰钢
温成形
热成形
马氏体
third generation automobile steel
medium-Mn steel
warm stamping
hot stamping
martensite
作者简介
李书利（1972-），男，大学本科，高级工程师；E—mail：lishuli@gwm．cn；
通讯作者：王存宇（1979-），男，博士，高级工程师；E-mail：wangcunyu@ec-cisri．com．cn
