淬火温度对中锰QP钢组织和性能的影响

doi:10.13251/j.issn.0254-6051.2020.05.033

金属热处理 ›› 2020, Vol. 45 ›› Issue (5): 172-175.DOI: 10.13251/j.issn.0254-6051.2020.05.033

淬火温度对中锰QP钢组织和性能的影响

王亚婷, 万德成, 冯树明, 李杰

华北理工大学冶金与能源学院, 河北唐山 063210

收稿日期:2019-11-12 出版日期:2020-05-25 发布日期:2020-09-02
通讯作者: 万德成,副教授,博士,E-mail:wandecheng@163.com
作者简介:王亚婷(1994—),女,硕士研究生,主要研究方向为钢的强化与韧化,E-mail:wangyt323@163.com。
基金资助:
河北省自然科学基金(E2016209166);河北省高等学校科学技术研究项目(QN2017125)

Effect of quenching temperature on microstructure and mechanical properties of medium manganese QP steel

Wang Yating, Wan Decheng, Feng Shuming, Li Jie

College of Metallurgy and Energy, North China University of Science and Technology, Tangshan Hebei 063210, China

Received:2019-11-12 Online:2020-05-25 Published:2020-09-02

摘要/Abstract

摘要： 采用部分奥氏体化-淬火-配分工艺对中锰钢进行热处理,研究不同淬火温度对微观组织和力学性能的影响。试验结果表明:随着淬火温度的升高,试验钢的伸长率先升高后降低,而抗拉强度却逐渐降低。淬火温度为140 ℃时,试验钢中一次马氏体和新生马氏体的体积分数之和最大,因此抗拉强度最高。淬火温度为180 ℃时,试验钢中残留奥氏体的体积分数最大,伸长率最高,综合力学性能最好,强塑积最高为30 328.2 MPa·%。而淬火温度升到200 ℃时,由于试验钢中残留奥氏体的含量减少以及新生马氏体的硬度降低,其伸长率和抗拉强度均降低。

关键词: Q&P工艺, 淬火温度, 微观组织, 力学性能

Abstract: Effect of different quenching temperature on microstructure and mechanical properties of medium manganese steel was studied by means of partial austenitization-quenching-partition process. The results show that with the increase of quenching temperature, the elongation of the tested steel increases first and then decreases, while the tensile strength decreases gradually. When the quenching temperature is 140 ℃, the total volume fraction of primary martensite and fresh martensite in the tested steel is the largest, so the tensile strength is the highest. The tested steel has the largest volume fraction of retained austenite and the highest elongation when the quenching temperature is 180 ℃, the comprehensive mechanical properties are the best and the product of tensile strength and plasticity is up to 30 328.2 MPa·% particularly. When the quenching temperature is increased to 200 ℃, the elongation and tensile strength of the tested steel decrease because of the decrease of retained austenite content and the hardness of fresh martensite.

Key words: Q&P process, quenching temperature, microstructure, mechanical properties

中图分类号:

TG161

王亚婷, 万德成, 冯树明, 李杰. 淬火温度对中锰QP钢组织和性能的影响[J]. 金属热处理, 2020, 45(5): 172-175.

Wang Yating, Wan Decheng, Feng Shuming, Li Jie. Effect of quenching temperature on microstructure and mechanical properties of medium manganese QP steel[J]. Heat Treatment of Metals, 2020, 45(5): 172-175.

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淬火温度对中锰QP钢组织和性能的影响

Effect of quenching temperature on microstructure and mechanical properties of medium manganese QP steel

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