感应炉+井式炉复合加热工艺对40Cr钢调质组织和力学性能的影响

doi:10.13251/j.issn.0254-6051.2023.11.029

金属热处理 ›› 2023, Vol. 48 ›› Issue (11): 185-190.DOI: 10.13251/j.issn.0254-6051.2023.11.029

感应炉+井式炉复合加热工艺对40Cr钢调质组织和力学性能的影响

王为民¹, 刘安奇¹, 郭春成¹, 笪仲钟¹, 亓海全¹, 韩向楠¹, 薛启河², 魏敏君³

1.桂林理工大学材料科学与工程学院, 广西桂林 541004;
2.河钢股份有限公司承德分公司, 河北承德 067000;
3.华菱安赛乐米塔尔汽车板有限公司, 湖南娄底 417009

收稿日期:2023-05-27 修回日期:2023-09-07 出版日期:2023-11-25 发布日期:2023-12-27
通讯作者: 亓海全,副教授,硕士研究生导师,E-mail:alexander_qi@163.com
作者简介:王为民(1997—),男,硕士研究生,主要研究方向为金属材料热处理工艺及其组织与力学性能,E-mail:wangweimin_9728@163.com。
基金资助:
广西科技重大专项(桂科AA22067079)

Effect of composite heating process of induction furnace and pit furnace on quenched and tempered microstructure and mechanical properties of 40Cr steel

Wang Weimin¹, Liu Anqi¹, Guo Chuncheng¹, Da Zhongzhong¹, Qi Haiquan¹, Han Xiangnan¹, Xue Qihe², Wei Minjun³

1. School of Materials Science and Engineering, Guilin University of Technology, Guilin Guangxi 541004, China;
2. HBIS Co., Ltd, Chengde Branch, Chengde Hebei 067000, China;
3. Valin Arcelor Mittal Automotive Steel Co., Ltd., Loudi Hunan 417009, China

Received:2023-05-27 Revised:2023-09-07 Online:2023-11-25 Published:2023-12-27

摘要/Abstract

摘要： 采用感应炉+井式炉复合加热方式(感应炉加热至870或900 ℃,到温后在860 ℃的井式炉内保温0.5 h)进行了40Cr钢的调质处理。通过显微组织观察、洛氏硬度和冲击性能测试,并与常规单一炉型淬火加热工艺进行对比分析,研究了感应炉+井式炉复合加热对40Cr钢组织与性能的影响。结果表明,复合加热工艺的硬度值为29~30 HRC,较常规工艺高4±2 HRC,且数据波动极小;复合加热工艺具有优良的冲击性能,采用回火水冷时可以得到最高的冲击吸收能量(118 J);复合加热工艺的试样均能够得到细小均匀的回火索氏体;最佳的复合加热工艺为,感应加热至900 ℃后移入860 ℃井式炉等温加热0.5 h,水淬,回火制度为580 ℃×1.5 h,水冷。对于细长轴类零件的调质处理,感应炉+井式炉复合加热方式具有较好的可行性,在改善材料综合力学性能的同时,可以大幅缩短加热保温时间,对于提高生产效率、降低能源成本、改善炉体寿命等具有重要的实际意义。

关键词: 感应加热, 调质处理, 40Cr钢, 显微组织, 力学性能

Abstract: Composite heating process composed of induction furnace heating to 870 ℃ or 900 ℃ and then pit furnace isothermal heating at 860 ℃ for 0.5 h was used to carry out quenching and tempering of the 40Cr steel. Effect of induction furnace and pit furnace composite heating on the microstructure and properties of the 40Cr steel was studied through microstructure observation, Rockwell hardness and impact property testing, and compared with conventional single furnace quenching heating process. The results show that the hardness obtained by the composite heating process is 29-30 HRC, which is 4±2 HRC higher than that by the conventional heating process, and the data fluctuation is minimal. The composite heating process provides excellent impact properties, and the highest impact absorbed energy of 118 J can be obtained when tempered with water-cooling. The specimen under composite heating process can obtain fine and uniform tempered sorbite. The optimal composite heating process is induction heating to 900 ℃ and then pit furnace isothermal heating at 860 ℃ for 0.5 h, water-quenching, tempering at 580 ℃ for 1.5 h and then water-cooling. It can be inferred that for the quenching and tempering treatment of slender shaft parts, the composite heating of induction furnace and pit furnace has good feasibility. While improving the comprehensive mechanical properties of the materials, the composite heating can greatly shorten the heating and holding time, which is of great practical significance for improving production efficiency, reducing energy costs and improving furnace life.

Key words: induction heating, quenching and tempering, 40Cr steel, microstructure, mechanical properties

中图分类号:

TG156.4

王为民, 刘安奇, 郭春成, 笪仲钟, 亓海全, 韩向楠, 薛启河, 魏敏君. 感应炉+井式炉复合加热工艺对40Cr钢调质组织和力学性能的影响[J]. 金属热处理, 2023, 48(11): 185-190.

Wang Weimin, Liu Anqi, Guo Chuncheng, Da Zhongzhong, Qi Haiquan, Han Xiangnan, Xue Qihe, Wei Minjun. Effect of composite heating process of induction furnace and pit furnace on quenched and tempered microstructure and mechanical properties of 40Cr steel[J]. Heat Treatment of Metals, 2023, 48(11): 185-190.

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感应炉+井式炉复合加热工艺对40Cr钢调质组织和力学性能的影响

Effect of composite heating process of induction furnace and pit furnace on quenched and tempered microstructure and mechanical properties of 40Cr steel

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