38CrMoAl圆钢调质裂纹形成原因分析

doi:10.13251/j.issn.0254-6051.2023.02.047

金属热处理 ›› 2023, Vol. 48 ›› Issue (2): 303-307.DOI: 10.13251/j.issn.0254-6051.2023.02.047

38CrMoAl圆钢调质裂纹形成原因分析

谭瑞松¹, 黄雁², 宋波¹, 左小坦², 朱利斌², 刘威¹, 杨树峰¹

1.北京科技大学冶金与生态工程学院, 北京 100083;
2.芜湖新兴铸管有限责任公司, 安徽芜湖 241002

收稿日期:2022-09-07 修回日期:2022-12-23 出版日期:2023-02-25 发布日期:2023-03-22
通讯作者: 宋波,教授,博士生导师,E-mail:songbo@metall.ustb.edu.cn
作者简介:谭瑞松(1997—),男,硕士研究生,主要研究方向为金属材料,E-mail:s20200245@xs.ustb.edu.cn。

Cause analysis of crack formation of 38CrMoAl round steel bar after quenching and tempering

Tan Ruisong¹, Huang Yan², Song Bo¹, Zuo Xiaotan², Zhu Libin², Liu Wei¹, Yang Shufeng¹

1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Wuhu Xinxing Ductile Pipe Co., Ltd., Wuhu Anhui 241002, China

Received:2022-09-07 Revised:2022-12-23 Online:2023-02-25 Published:2023-03-22

摘要/Abstract

摘要： 国内某钢厂38CrMoAl钢在调质过程中出现了裂纹,对裂纹处进行取样,通过化学成分、宏观检测、显微组织分析、扫描电镜分析等探索裂纹产生的原因。结果表明,该钢裂纹性质为淬火裂纹,其产生的主要原因是原始材料圆坯存在冶金缺陷(缩松、点状偏析等),而调质过程中在组织应力和热应力作用下促进了裂纹的扩展。

关键词: 38CrMoAl圆钢, 淬火裂纹, 缺陷, 成分偏析

Abstract: Cracks occurred after quenching and tempering in 38CrMoAl steel bar produced in a domestic steel mill, the crack was sampled, and the cause of cracks was investigated by means of chemical composition, macroscopic detection, microstructure analysis, scanning electron microscopy analysis, etc. The results show that the cracks are induced during quenching. The main reason for this is the presence of metallurgical defects including shrinkage, spot segregation, etc. in the original material round billet, while the effect of structural stress and thermal stress during the quenching and tempering promotes the propagation of the crack.

Key words: 38CrMoAl round steel, quenching crack, defect, segregation

中图分类号:

TG142.15

谭瑞松, 黄雁, 宋波, 左小坦, 朱利斌, 刘威, 杨树峰. 38CrMoAl圆钢调质裂纹形成原因分析[J]. 金属热处理, 2023, 48(2): 303-307.

Tan Ruisong, Huang Yan, Song Bo, Zuo Xiaotan, Zhu Libin, Liu Wei, Yang Shufeng. Cause analysis of crack formation of 38CrMoAl round steel bar after quenching and tempering[J]. Heat Treatment of Metals, 2023, 48(2): 303-307.

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38CrMoAl圆钢调质裂纹形成原因分析

Cause analysis of crack formation of 38CrMoAl round steel bar after quenching and tempering

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