回火温度对高强耐磨钢组织与强韧性的影响

doi:10.13251/j.issn.0254-6051.2024.12.003

金属热处理 ›› 2024, Vol. 49 ›› Issue (12): 20-26.DOI: 10.13251/j.issn.0254-6051.2024.12.003

回火温度对高强耐磨钢组织与强韧性的影响

贺帅^1,2, 李志峰³, 刘鑫^1,2, 秦哲^1,2, 刘旭明^1,2

1.海洋装备用金属材料及其应用国家重点实验室, 辽宁鞍山 114009;
2.鞍钢集团北京研究院有限公司, 北京 102200;
3.中国钢研科技集团有限公司,北京 100081

收稿日期:2024-06-02 修回日期:2024-10-09 出版日期:2024-12-25 发布日期:2025-02-05
通讯作者: 李志峰,工程师,博士,E-mail:lizhifengimust@163.com
作者简介:贺帅(1991—),女,研究员,博士,主要研究方向为高强钢组织性能调控,E-mail:neuheshuai2016@126.com。
基金资助:
国家自然科学基金(52004063)

Effect of tempering temperature on microstructure and strength-toughness of high-strength wear-resistant steel

He Shuai^1,2, Li Zhifeng³, Liu Xin^1,2, Qin Zhe^1,2, Liu Xuming^1,2

1. State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan Liaoning 114009, China;
2. Ansteel Beijing Research Institute Co., Ltd., Beijing 102200, China;
3. China Iron and Steel Research Institute Group, Beijing 100081, China

Received:2024-06-02 Revised:2024-10-09 Online:2024-12-25 Published:2025-02-05

摘要/Abstract

摘要： 在200~700 ℃回火温度范围内,研究了回火温度对高强耐磨钢组织和强韧性的影响。结果表明,经500~700 ℃回火后,试验钢马氏体板条退化,抗拉强度、屈服强度和硬度较淬火态显著下降,V型缺口和U型缺口的冲击吸收能量均小于12 J。在200~400 ℃回火后,试样的冲击性能显著提高,V型缺口和U型缺口的冲击吸收能量峰值对应的回火温度分别是250 ℃和300 ℃,屈服强度和拉伸强度分别保持在1340 MPa和1660 MPa以上,断后伸长率超过10%。试验钢在250 ℃回火后获得了最佳的综合力学性能,V型缺口和U型缺口冲击吸收能量分别为40 J和59 J,屈服强度为1374 MPa,屈强比为0.80,强韧积为92 269 MPa·J·cm^-2。基于Si对渗碳体析出的阻碍作用,钢中较高的Si含量提高了回火脆性区间,试验钢回火温度脆性区为450~700 ℃。

关键词: 高强耐磨钢, 回火温度, 组织, 强韧性, 冲击性能, 回火脆性

Abstract: Effect of tempering temperature on microstructure and strength-toughness of high-strength wear-resistant steel was studied in the tempering temperature range of 200-700 ℃. The results show that the martensite lath degenerates after tempering at 500-700 ℃, resulting in a significant decrease in tensile strength, yield strength, and hardness. The impact absorbed energys of V-notch and U-notch are both less than 12 J. After tempering at 200-400 ℃, the impact properties of the specimens are significantly improved. The tempering temperatures corresponding to the impact absorbed energy peak of V-notch and U-notch are 250 ℃ and 300 ℃, respectively. The yield strength and tensile strength are maintained at more than 1340 MPa and 1660 MPa, respectively, and the elongation exceeds 10%. The tested steel achieves the best comprehensive mechanical properties after tempering at 250 ℃, with V-notch and U-notch impact absorbed energy of 40 J and 59 J, respectively, the yield strength of 1374 MPa, the yield ratio of 0.80 and the strength-toughness product of 92 269 MPa·J·cm^-2. Based on the hindering effect of Si on the precipitation of cementite, the higher Si content in the steel increases the temper brittleness range. The tempering temperature brittleness range of the tested steel is 450-700 ℃.

Key words: high-strength wear-resistant steel, tempering temperature, microstructure, strength-toughness, impact property, temper brittleness

中图分类号:

TG156

贺帅, 李志峰, 刘鑫, 秦哲, 刘旭明. 回火温度对高强耐磨钢组织与强韧性的影响[J]. 金属热处理, 2024, 49(12): 20-26.

He Shuai, Li Zhifeng, Liu Xin, Qin Zhe, Liu Xuming. Effect of tempering temperature on microstructure and strength-toughness of high-strength wear-resistant steel[J]. Heat Treatment of Metals, 2024, 49(12): 20-26.

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回火温度对高强耐磨钢组织与强韧性的影响

Effect of tempering temperature on microstructure and strength-toughness of high-strength wear-resistant steel

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