淬火加热温度对超细晶Q&P钢组织性能的影响

doi:10.13251/j.issn.0254-6051.2022.12.011

金属热处理 ›› 2022, Vol. 47 ›› Issue (12): 67-73.DOI: 10.13251/j.issn.0254-6051.2022.12.011

淬火加热温度对超细晶Q&P钢组织性能的影响

郭昊东¹, 唐正友^1,2, 赵利¹, 管国富¹, 游泽宇¹, 丁桦^1,2

1.东北大学材料科学与工程学院, 辽宁沈阳 110819;
2.辽宁省轻量化用关键金属结构材料重点实验室, 辽宁沈阳 110819

收稿日期:2022-07-11 修回日期:2022-10-15 出版日期:2022-12-25 发布日期:2023-01-05
通讯作者: 唐正友,教授,博士,E-mail: tangzy@smm.neu.edu.cn
作者简介:郭昊东(1997—),男,硕士,主要研究方向为Q&P钢组织性能,E-mail:d20152458@163.com。
基金资助:
国家自然科学基金(51874088);中央高校基本科研业务专项(N2002015)

Effect of quenching temperature on microstructure and properties of ultrafine-grained Q&P steel

Guo Haodong¹, Tang Zhengyou^1,2, Zhao Li¹, Guan Guofu¹, You Zeyu¹, Ding Hua^1,2

1. School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning 110819, China;
2. Liaoning Provincial Key Laboratory of Lightweight Metallic Structural Materials, Shenyang Liaoning 110819, China

Received:2022-07-11 Revised:2022-10-15 Online:2022-12-25 Published:2023-01-05

摘要/Abstract

摘要： 研究了淬火加热温度对超细晶Q&P钢微观组织、元素分布、残留奥氏体体积分数和力学性能的影响。结果表明,当淬火加热温度升高时,铁素体含量逐渐减少,马氏体含量升高,残留奥氏体含量呈现先增加后减少的趋势,高淬火加热温度下C元素的扩散速率加快,残留奥氏体的机械稳定性更好。软相铁素体的存在为试验钢提供了良好的韧性。当淬火加热温度为820 ℃时,Q&P钢的综合力学性能最好,抗拉强度为863 MPa,伸长率为26.1%,强塑积为22.5 GPa·%。

关键词: Q&, P钢, 微观结构, 力学性能, 残留奥氏体, TRIP效应

Abstract: Effect of quenching temperature on microstructure, element distribution, retained austenite volume fraction and mechanical properties of ultrafine-grained Q&P steels was investigated. The results show that when the annealing temperature increases, the ferrite content gradually decreases, the martensite content increases, and the retained austenite content increases first and then decreases; and at high quenching temperatures, the diffusion rate of C atoms is accelerated, the mechanical stability of retained austenite is better. The presence of soft-phase ferrite provides good toughness for the tested steel. When the quenching temperature is 820 ℃, the comprehensive mechanical properties of the Q&P steel are the best, the tensile strength is 863 MPa, the elongation is 26.1 %, and the strength-plasticity product is 22.5 GPa·%.

Key words: Q&P steel, microstructure, mechanical properties, retained austenite, TRIP effect

中图分类号:

TG161

郭昊东, 唐正友, 赵利, 管国富, 游泽宇, 丁桦. 淬火加热温度对超细晶Q&P钢组织性能的影响[J]. 金属热处理, 2022, 47(12): 67-73.

Guo Haodong, Tang Zhengyou, Zhao Li, Guan Guofu, You Zeyu, Ding Hua. Effect of quenching temperature on microstructure and properties of ultrafine-grained Q&P steel[J]. Heat Treatment of Metals, 2022, 47(12): 67-73.

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淬火加热温度对超细晶Q&P钢组织性能的影响

Effect of quenching temperature on microstructure and properties of ultrafine-grained Q&P steel

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