两相区热处理对DP780双相钢组织与力学性能的影响
Effects of Two Phase Heat Treatment on Microstructure and Mechanical Properties of DP780 Dual Phase Steel
冯鑫 1魏立群 1付斌 1徐星星1
作者信息
- 1. 上海应用技术大学 材料科学与工程学院,上海 201418
- 折叠
摘要
采用OM、拉伸试验机研究了不同温度、时间的两相区热处理对DP780 双相钢组织及力学性能的影响.结果表明:冷轧态DP780 双相钢经过870℃×60 min奥氏体化,再进行780℃不同时间的两相区保温热处理后,试验钢组织为马氏体和铁素体双相组织,随着保温时间的增加,试验钢中马氏体含量逐渐减少.经过 780℃×5 min两相区热处理的试验钢,其伸长率达到最大值18%,抗拉强度接近1100 MPa,试验钢的强塑性能匹配最佳.
Abstract
The effects of two phase heat treatment with different temperature and time on the microstructure and mechanical properties of DP780 dual phase steel were studied by OM and tensile testing machine.The results show that the microstructure of cold rolled DP780 dual phase steel is martensite and ferrite after being austenitized at 870℃for 60 min and then heat treated at 780℃for different time.With the increase of holding time,the martensite content in the test steel decreases gradually.The elongation of the steel after heat treatment at 780℃×5 min reaches the maximum value of 18%,and the tensile strength is close to 1100 MPa,and the matching of strength and plastic properties of the test steel is best.
关键词
DP780双相钢/两相区热处理/铁素体/马氏体/力学性能Key words
DP780 dual phase steel/two phase heat treatment/ferrite/martensite/mechanical properties引用本文复制引用
基金项目
上海市冶金工艺和设备检测专业技术服务平台项目(11DZ2291200)
出版年
2024
NETL
NSTL
万方数据