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

景财年; 陈晓辉; 刘在学; 谭启忠; 李亮

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

更新时间：2026-01-21

- Effect of Austempering Isothermal-Time at Bainite Field on Structure and Mechanical Properties of Low Silicon TRIP Steel
- Special Steel Vol. 30, Issue 4, Pages: 63-65(2009)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：12 January 2009，
  
  Online First：20 December 2022，
  
  Published：20 December 2009
- 稿件说明：
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景财年, 陈晓辉, 刘在学, et al. 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.
DOI：

景财年, 陈晓辉, 刘在学, et al. 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. DOI：

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%.

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