52CrMoV4弹簧扁钢的端淬特性

doi:10.13251/j.issn.0254-6051.2024.04.003

金属热处理 ›› 2024, Vol. 49 ›› Issue (4): 12-17.DOI: 10.13251/j.issn.0254-6051.2024.04.003

52CrMoV4弹簧扁钢的端淬特性

张文涛¹, 刘超², 杜垚², 闵永安¹

1.上海大学材料科学与工程学院, 上海 200444;
2.河北永洋特钢集团有限公司, 河北邯郸 057150

收稿日期:2023-11-10 修回日期:2024-03-14 出版日期:2024-04-25 发布日期:2024-05-27
通讯作者: 闵永安,副教授,博士,E-mail: mya@staff.shuedu.cn
作者简介:张文涛(1999— ),男,硕士研究生,主要研究方向为弹簧扁钢的疲劳性能,E-mail: 1056557436@qq.com。
基金资助:
河北省重大科技成果转化专项(20281009Z)

Jominy end quenching characteristics of 52CrMoV4 leaf spring steel

Zhang Wentao¹, Liu Chao², Du Yao², Min Yongan¹

1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
2. Hebei Yongyang Special Steel Group Co., Ltd., Handan Hebei 057150, China

Received:2023-11-10 Revised:2024-03-14 Online:2024-04-25 Published:2024-05-27

摘要/Abstract

摘要： 在大规格52CrMoV4热轧弹簧扁钢上取样,进行端淬试验,研究900 ℃×1 h的正火预处理和850、900 ℃的奥氏体化对52CrMoV4钢端淬性能的影响。结果表明,热轧扁钢在850 ℃端淬后,淬火硬度较低,端淬硬度曲线波动较大,带状组织明显,该温度端淬在一定程度上反映了钢材成分均匀程度。热轧扁钢在900 ℃端淬后能够获得更高的硬度。端淬前的正火处理能使整体硬度得到提升,但其提升效果不如提高淬火温度明显。52CrMoV4钢板簧生产中,采用900 ℃淬火能稳定获得60 HRC左右的高硬度,提升钢板弹簧的淬火工艺性。

关键词: 弹簧扁钢, 淬透性, 组织均匀性, 硬度

Abstract: Jominy end quenching test were carried out on 52CrMoV4 large specification leaf spring steel to investigate the effects of normalizing pretreatment at 900 ℃ for 1 h and austenitizing at 850 ℃ and 900 ℃ on Jominy end quenching characteristic of the 52CrMoV4 leaf spring steel. The results show that the end-quenching hardness of hot-rolled steel after austenitizing at 850 ℃ is lower and banded microstructure is more obvious and the end-quenching curve fluctuates greatly, which can reflect the uniformity of chemical composition distribution to some degree. Hot-rolled steel austenitized at 900 ℃ can reach higher hardness and normalizing before quenching can stabilize the overall hardness of 52CrMoV4 leaf spring steel. During 52CrMoV4 steel leaf spring manufacturing process, 900 ℃ austenitizing temperature is adopted to acquire higher hardness around 60 HRC, displaying better quenching properties.

Key words: leaf spring steel, hardenability, microstructure uniformity, hardness

中图分类号:

TG142.1

张文涛, 刘超, 杜垚, 闵永安. 52CrMoV4弹簧扁钢的端淬特性[J]. 金属热处理, 2024, 49(4): 12-17.

Zhang Wentao, Liu Chao, Du Yao, Min Yongan. Jominy end quenching characteristics of 52CrMoV4 leaf spring steel[J]. Heat Treatment of Metals, 2024, 49(4): 12-17.

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52CrMoV4弹簧扁钢的端淬特性

Jominy end quenching characteristics of 52CrMoV4 leaf spring steel

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