Si含量对高碳贝氏体钢微观组织与性能的影响

doi:10.13251/j.issn.0254-6051.2023.09.028

金属热处理 ›› 2023, Vol. 48 ›› Issue (9): 165-173.DOI: 10.13251/j.issn.0254-6051.2023.09.028

Si含量对高碳贝氏体钢微观组织与性能的影响

戴钊¹, 郭智², 龙晓燕^1,3, 冯晓勇⁴, 刘伟¹, 张福成⁴, 李艳国¹

1.燕山大学亚稳材料制备技术与科学国家重点实验室, 河北秦皇岛 066004;
2.秦皇岛港股份有限公司第七港务分公司, 河北秦皇岛 066004;
3.广州航海学院轮机工程学院, 广东广州 510725;
4.华北理工大学冶金与能源学院, 河北唐山 063210

收稿日期:2023-04-11 修回日期:2023-07-11 出版日期:2023-09-25 发布日期:2023-10-25
通讯作者: 龙晓燕,副教授,博士,E-mail:longxiaoyanlxy@163.com
作者简介:戴钊(1996—),男,硕士研究生,主要研究方向为纳米贝氏体轴承钢韧性调控机理,E-mail:dai_zhao@stumail.ysu.edu.cn。
基金资助:
国家自然科学基金(52001275);河北省教育厅在读研究生创新能力培养项目(CXZZSS2022116)

Effect of Si content on microstructure and properties of high carbon bainitic steel

Dai Zhao¹, Guo Zhi², Long Xiaoyan^1,3, Feng Xiaoyong⁴, Liu Wei¹, Zhang Fucheng⁴, Li Yanguo¹

1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao Hebei 066004, China;
2. Seventh Port Branch, Qinhuangdao Port Co., Ltd., Qinhuangdao Hebei 066004, China;
3. Guangzhou Maritime Institute, Guangzhou Guangdong 510725, China;
4. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan Hebei 063210, China

Received:2023-04-11 Revised:2023-07-11 Online:2023-09-25 Published:2023-10-25

摘要/Abstract

摘要： 以4种不同Si含量的高碳贝氏体轴承钢为研究对象,在相同热处理条件下,通过热膨胀相变仪、X射线衍射仪、扫描电镜和透射电镜等技术研究Si含量对高碳贝氏体轴承钢相变、组织特征及力学性能的影响。结果表明,Si能够延长高碳贝氏体轴承钢贝氏体转变孕育期,降低贝氏体转变速率并提高Ac₁、Ac_cm温度。随着钢中Si含量的增加,高碳贝氏体轴承钢中残留奥氏体体积分数增大,但贝氏体铁素体板条尺寸减小;当Si含量达到1.4%时,贝氏体铁素体板条尺寸达到纳米级且板条内无碳化物析出。力学性能结果表明,高碳贝氏体轴承钢硬度随Si含量的增加而降低,冲击性能随Si含量的增加而升高,Si含量为1.4%时高碳贝氏体轴承钢具有最佳的综合力学性能。

关键词: Si, 高碳贝氏体钢, 显微组织, 硬度, 冲击吸收能量

Abstract: Four kinds of high carbon bainitic bearing steels with different Si contents were designed. Under the same heat treatment condition, the effect of Si content on phase transformation, microstructure characteristics and mechanical properties of the high carbon bainitic bearing steels was studied by means of thermal expansion phase change meter, X-ray diffractometer, scanning electron microscope, transmission electron microscope techniques. The results show that Si can prolong the bainite transformation incubation period, decreases the bainite transformation rate and increase the phase transformation points of Ac₁, Ac_cm of the high carbon bainitic bearing steels. With the increase of Si content in the high carbon bainitic bearing steels, the volume fraction of retained austenite of the high carbon bainitic bearing steels increases, but the size of bainitic ferrite lath decreases. When the Si content reaches 1.4%, the size of bainite ferrite lath reaches nanometer level and no carbides precipitates in it. The results of mechanical properties show that the hardness of the steels decreases with the increase of Si content, and the toughness increases with the increase of Si content. The steel with the Si content of 1.4% has the best comprehensive mechanical properties.

Key words: Si, high carbon bainitic steel, microstructure, hardness, impact absorbed energy

中图分类号:

TG142

戴钊, 郭智, 龙晓燕, 冯晓勇, 刘伟, 张福成, 李艳国. Si含量对高碳贝氏体钢微观组织与性能的影响[J]. 金属热处理, 2023, 48(9): 165-173.

Dai Zhao, Guo Zhi, Long Xiaoyan, Feng Xiaoyong, Liu Wei, Zhang Fucheng, Li Yanguo. Effect of Si content on microstructure and properties of high carbon bainitic steel[J]. Heat Treatment of Metals, 2023, 48(9): 165-173.

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Si含量对高碳贝氏体钢微观组织与性能的影响

Effect of Si content on microstructure and properties of high carbon bainitic steel

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