退火工艺对30Cr15Mo1N钢组织和力学性能的影响

doi:10.13251/j.issn.0254-6051.2024.04.018

金属热处理 ›› 2024, Vol. 49 ›› Issue (4): 110-115.DOI: 10.13251/j.issn.0254-6051.2024.04.018

退火工艺对30Cr15Mo1N钢组织和力学性能的影响

李菁菁¹, 王存宇¹, 杜敏², 徐海峰¹, 俞峰¹, 曹文全¹

1.钢铁研究总院有限公司特殊钢研究院, 北京 100081;
2.钢铁研究总院有限公司中心实验室, 北京 100081

收稿日期:2023-10-16 修回日期:2024-02-27 出版日期:2024-04-25 发布日期:2024-05-27
通讯作者: 王存宇,正高级工程师,博士,E-mail:wang_cunyu@126.com
作者简介:李菁菁(1999—),女,硕士,主要研究方向为高氮不锈轴承钢,E-mail:lijj17622350716@163.com。
基金资助:
国家重点研发计划(2016YFB0300101)

Effect of annealing process on microstructure and mechanical properties of 30Cr15Mo1N steel

Li Jingjing¹, Wang Cunyu¹, Du Min², Xu Haifeng¹, Yu Feng¹, Cao Wenquan¹

1. Research Institute of Special Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China;
2. Central Laboratory, Central Iron & Steel Research Institute Co., Ltd., Beijing 100081, China

Received:2023-10-16 Revised:2024-02-27 Online:2024-04-25 Published:2024-05-27

摘要/Abstract

摘要： 对比研究了软化退火和球化退火工艺对热轧30Cr15Mo1N钢线材析出相特征,淬火、深冷、回火处理后微观组织和力学性能的影响。结果表明,退火后析出相为Cr₂(C,N)、M₂₃C₆,球化退火试样析出相尺寸更细小,球化效果更好,分布更均匀,软化退火试样具有更高的强度,其抗拉强度为819 MPa,比球化退火试样高63 MPa,球化退火试样在拉伸过程中出现不连续屈服现象。软化退火试样中更多的析出相有效抑制了再加热过程中晶粒长大,使其在热处理后具有更细小的晶粒尺寸,硬度达到61.4 HRC,高于球化退火试样。

关键词: 30Cr15Mo1N钢, 软化退火, 球化退火, 显微组织

Abstract: Effects of softening annealing and spheroidal annealing on the characteristics of precipitates, microstructure and mechanical properties of hot rolled 30Cr15Mo1N steel wire after quenching, cryogenic treatment and tempering were comparatively studied. The results show that precipitates after annealing are Cr₂(C,N) and M₂₃C₆, where the spheroidal annealed specimen has a smaller size of precipitates, better spheroidizing effect, and more uniform distribution. The softening annealed specimen has higher strength, its tensile strength is 819 MPa, 63 MPa higher than that of the spheroidal annealed specimen, and the spheroidal annealed specimen shows discontinuous yield phenomenon during tensile process. The more precipitates in the softening annealed specimen effectively inhibit grain growth during the reheating process, resulting in finer grain size after heat treatment, and the hardness is 61.4 HRC, which is higher than that of the spheroidal annealed specimen.

Key words: 30Cr15Mo1N steel, softening annealing, spheroidizing annealing, microstructure

中图分类号:

TG142.1

李菁菁, 王存宇, 杜敏, 徐海峰, 俞峰, 曹文全. 退火工艺对30Cr15Mo1N钢组织和力学性能的影响[J]. 金属热处理, 2024, 49(4): 110-115.

Li Jingjing, Wang Cunyu, Du Min, Xu Haifeng, Yu Feng, Cao Wenquan. Effect of annealing process on microstructure and mechanical properties of 30Cr15Mo1N steel[J]. Heat Treatment of Metals, 2024, 49(4): 110-115.

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退火工艺对30Cr15Mo1N钢组织和力学性能的影响

Effect of annealing process on microstructure and mechanical properties of 30Cr15Mo1N steel

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