贝氏体区等温时间对低硅TRIP钢组织和力学性能的影响

特殊钢 ›› 2009, Vol. 30 ›› Issue (4): 63-65.

贝氏体区等温时间对低硅TRIP钢组织和力学性能的影响

景财年¹, 陈晓辉², 刘在学¹, 谭启忠¹, 李亮¹

1山东建筑大学材料科学与工程学院，济南250101;
2山东交通学院机械加工实验中心，济南250023

收稿日期:2009-01-12 出版日期:2009-08-01 发布日期:2022-12-20
作者简介:景财年(1973-),男，博士，副教授，钢铁材料组织和性能研究。
基金资助:
山东省博士后创新项目 (20070225),
建设部科技计划项目(2008-K4-7),
山东省博士基金(2008BS04023)

Effect of Austempering Isothermal-Time at Bainite Field on Structure and Mechanical Properties of Low Silicon TRIP Steel

Jing Cainian¹, Chen Xiaohui², Liu Zaixue¹, Tan Qizhong¹, Li Liang¹

1 School of Materials Science and Engineering,Shandong Architecture University,Jinan 250101;
2 Lab of Mechanical Manufacture, Shandong Jiaotong University, Jinan 250023

Received:2009-01-12 Published:2009-08-01 Online:2022-12-20

摘要/Abstract

摘要： 研究了0.15C-1.5Mn-1.5Al-0.3Si TRIP钢820℃2 min加热后快冷至450℃盐浴中保温5～300s空冷的组织和力学性能。结果表明,随在贝氏体转变区450℃等温时间的增加,该钢的屈服强度和伸长率增加,抗拉强度降低,等温时间60s时强塑积最佳,为23 000MPa%;等温时间≤60s时随等温时间增加钢中残余奥氏体含量增加,>60s时随等温时间的增加钢中残余奥氏体含量降低,60s时钢中残余奥氏体达到最高值,为14%。

Abstract: Structure and mechanical properties of0. 15C- 1.5Mn- 1.5Al-0.3Si TRIP steel heated at 820 ℃ for 2 min then quenching in 450 ℃ salt bath for 5~300 s,air cooling have been studied. Results showed that with increasing iso- thermal-time in Bainite transformation field at 450 ℃,the yield strength and elongation of steel increased while tensile strength decreased, and the product of tensile strength-elongation of steel was highest i.e.23000 MPa% with isothermal- treating for 60 s; as isothermal-treating for less than 60 s, with increasing isothermal-treating time, the retained austenite content in steel increased, as isothermal-treating for more than 60 s, with increasing isothermal-treating time, the retained austenite content in steel decreased, and the retained austenite content in steel isothermal-treating for 60 s was highest i.e. 14%.

景财年, 陈晓辉, 刘在学, 谭启忠, 李亮. 贝氏体区等温时间对低硅TRIP钢组织和力学性能的影响[J]. 特殊钢, 2009, 30(4): 63-65.

Jing Cainian, Chen Xiaohui, Liu Zaixue, Tan Qizhong, Li Liang. Effect of Austempering Isothermal-Time at Bainite Field on Structure and Mechanical Properties of Low Silicon TRIP Steel[J]. Special Steel, 2009, 30(4): 63-65.