调质处理温度对高碳高硅钢组织及性能的影响

doi:10.13251/j.issn.0254-6051.2024.11.014

金属热处理 ›› 2024, Vol. 49 ›› Issue (11): 99-103.DOI: 10.13251/j.issn.0254-6051.2024.11.014

调质处理温度对高碳高硅钢组织及性能的影响

陆超, 张宇, 王雷, 李月云

江苏省(沙钢)钢铁研究院, 江苏张家港 215625

收稿日期:2024-07-19 修回日期:2024-08-29 出版日期:2024-11-25 发布日期:2025-01-09
通讯作者: 王雷,高级工程师,硕士,E-mail:wanglei-iris@shasteel.cn
作者简介:陆超(1997—),男,助理工程师,硕士,主要研究方向为高碳钢线材产品,E-mail:luchao-iris@shasteel.cn。

Effects of quenching and tempering temperature on microstructure and properties of high carbon high silicon steel

Lu Chao, Zhang Yu, Wang Lei, Li Yueyun

Institute of Research of Iron and Steel, Shagang, Jiangsu Province, Zhangjiagang Jiangsu 215625, China

Received:2024-07-19 Revised:2024-08-29 Online:2024-11-25 Published:2025-01-09

摘要/Abstract

摘要： 研究了840~1000 ℃淬火、300~600 ℃回火对高碳高硅SWRS96Si钢的组织和力学性能的影响规律。结果表明,随着淬火温度升高,未溶碳化物逐渐溶解,针状马氏体逐渐粗化,残留奥氏体逐步增多,淬火温度≥920 ℃时残留奥氏体的含量为21%~23%;回火过程中,在300~400 ℃温度区间残留奥氏体发生分解,在400~466 ℃温度区间马氏体分解、渗碳体形核长大。SWRS96Si钢在840~960 ℃淬火并在480 ℃回火时,随着淬火温度的升高,试样的断面收缩率由32%降低至24%,而强度则由1569 MPa提升至1968 MPa;在920 ℃淬火并在300~600 ℃回火时,随着回火温度升高,组织中孪晶马氏体逐步分解为渗碳体和铁素体,试样的硬度由61 HRC逐步降低到42 HRC,而室温冲击吸收能量则由1.6 J提升至9.5 J。

关键词: 高碳钢, 调质处理, 马氏体, 残留奥氏体, 力学性能

Abstract: Effects of quenching from 840 ℃ to 1000 ℃ and tempering from 300 ℃ to 600 ℃ on microstructure and mechanical properties of the high carbon and high silicon SWRS96Si steel were studied. The results show that the undissolved carbides dissolve gradually, the acicular martensite coarsens and the amount of retained austenite increases gradually with the increase of quenching temperature. When the quenching temperature is greater than or equal to 920 ℃, the amount of retained austenite is 21%-23%. During tempering, the retained austenite decomposes from 300 ℃ to 400 ℃, the martensite decomposition and the nucleation and growth of cementite occur during tempering from 400 ℃ to 466 ℃. When the SWRS96Si steel is quenched from 840 ℃ to 960 ℃ and tempered at 480 ℃, with the increase of quenching temperature, the percentage reduction of area of the steel decreases from 32% to 24%, while the strength increases from 1569 MPa to 1968 MPa. When quenched at 920 ℃ and tempered from 300 ℃ to 600 ℃, with the increase of tempering temperature, the twin martensite in the microstructure gradually decomposes into cementite and ferrite, the hardness of the steel reduces from 61 HRC to 42 HRC gradually, while the impact absorbed energy at room temperature increases from 1.6 J to 9.5 J.

Key words: high carbon steel, quenching and tempering, martensite, retained austenite, mechanical properties

中图分类号:

TG161

陆超, 张宇, 王雷, 李月云. 调质处理温度对高碳高硅钢组织及性能的影响[J]. 金属热处理, 2024, 49(11): 99-103.

Lu Chao, Zhang Yu, Wang Lei, Li Yueyun. Effects of quenching and tempering temperature on microstructure and properties of high carbon high silicon steel[J]. Heat Treatment of Metals, 2024, 49(11): 99-103.

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调质处理温度对高碳高硅钢组织及性能的影响

Effects of quenching and tempering temperature on microstructure and properties of high carbon high silicon steel

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