高强度汽车紧固件用SCM415H钢的组织转变

doi:10.13251/j.issn.0254-6051.2025.01.010

金属热处理 ›› 2025, Vol. 50 ›› Issue (1): 63-67.DOI: 10.13251/j.issn.0254-6051.2025.01.010

高强度汽车紧固件用SCM415H钢的组织转变

褚峰, 李战卫, 于学森, 张继明

江苏省(沙钢)钢铁研究院, 江苏张家港 215625

收稿日期:2024-08-12 修回日期:2024-11-08 出版日期:2025-01-25 发布日期:2025-03-12
作者简介:褚峰(1991—),男,工程师,主要研究方向为钢铁组织性能检测及控制,E-mail:669124732@qq.com

Microstructure transformation of SCM415H steel for high strength automotive fasteners

Chu Feng, Li Zhanwei, Yu Xuesen, Zhang Jiming

Institute of Research of Iron & Steel, Shagang, Jiangsu Province, Zhangjiagang Jiangsu 215625, China

Received:2024-08-12 Revised:2024-11-08 Online:2025-01-25 Published:2025-03-12

摘要/Abstract

摘要： 通过热模拟试验研究了汽车紧固件用SCM415H钢的组织转变行为。结果表明:冷速为0.25 ℃/s时,显微组织为铁素体和珠光体;冷速达到0.5 ℃/s时,开始出现贝氏体和马氏体;冷速达到5 ℃/s时,显微组织以马氏体和贝氏体为主;冷速达到15 ℃/s及以上时,显微组织以马氏体为主。等温转变时,珠光体转变的温度区间为700~575 ℃,鼻尖温度约为660 ℃,约428 s完成相变。依据试验结果,工业试制24 mm规格SCM415H钢盘条经过一球两拉后,成功试制10.9级汽车紧固件。

关键词: 汽车紧固件用钢, SCM415H, 连续冷却, 等温转变, 球化体等级

Abstract: The phase transformation characteristics of the SCM415H steel for automotive fasteners were studied by thermal simulation. The cooling rate of 0.25 ℃/s produces a microstructure of ferrite and pearlite, while the bainite and martensite occurs with the cooling rate reaches 0.5 ℃/s. The cooling rate of 5 ℃/s results in a microstructure of mainly martensite and bainite, and that of 15 ℃/s or above results in a microstructure of mainly martensite. The pearlitic transformation temperature is 700-575 ℃ during isothermal conditions. The nose tip temperature is about 660 ℃, and completion time of the phase transformation is about 428 s. Based on the tested results, the steel wires with a diameter of 24 mm were successfully produced, and then grade 10.9 automobile fasteners were successfully produced after one spheroidizing annealing and two drawing processes.

Key words: steel for automotive fasteners, SCM415H, continuous cooling, isothermal transformation, spheroidite grade

中图分类号:

TG142.1

褚峰, 李战卫, 于学森, 张继明. 高强度汽车紧固件用SCM415H钢的组织转变[J]. 金属热处理, 2025, 50(1): 63-67.

Chu Feng, Li Zhanwei, Yu Xuesen, Zhang Jiming. Microstructure transformation of SCM415H steel for high strength automotive fasteners[J]. Heat Treatment of Metals, 2025, 50(1): 63-67.

参考文献

[1]王柱兴, 吕金旗, 栗智鹏. 轻量化镁合金轮毂生产工艺研究[J]. 汽车工业研究, 2018(6): 52-55.
[2]冯美斌. 汽车轻量化技术中新材料的发展及应用[J]. 汽车工程, 2006, 28(3): 213-220.
Feng Meibin. Development and applications of new materials in automotive light weighting technologies[J]. Automotive Engineering, 2006, 28(3): 213-220.
[3]李北方. 钛合金的特征及其在汽车零件中的应用[J]. 技术与市场, 2016, 23(12): 220-220.
[4]石正富, 袁月明, 宫辉, 等. SCM435 冷镦钢的球化退火工艺[J]. 热处理, 2024, 39(5): 33-35.
Shi Zhengfu, Yuan Yueming, Gong Hui, et al. Spheroidizing processes of SCM435 cold-heading steel[J]. Heat Treatment, 2024, 39(5): 33-35.
[5]张贤忠, 熊玉彰, 陈庆丰. 汽车传动结构用钢SCM415的开发[J]. 钢铁研究, 2017, 45(6): 71-74.
Zhang Xianzong, Xiong Yuzhang, Chen Qingfeng. Development of SCM415 steel used for automobile transmission machinery[J]. Research on Iron and Steel, 2017, 45(6): 71-74.
[6]沈明堂, 于铁生, 翟秋明, 等. SCM415钢高温渗碳和常规渗碳的组织与性能[J]. 金属热处理, 2009, 34(9): 88-90.
Shen Mingtang, Yu Tiesheng, Zhai Qiuming, et al. Microstructure and properties of SCM415 steel after high temperature carburizing and traditional carburizing[J]. Heat Treatment of Metals, 2009, 34(9): 88-90.
[7]侯海山, 陆蓓. SCM415H钢凸轮轴的渗碳淬火[J]. 热处理, 2019, 34(6): 57-58.
Hou Haishan, Lu Bei. Carburizing and hardening of 4320H steel camshaft[J]. Heat Treatment, 2019, 34(6): 57-58.
[8]于学森, 李战卫, 王金涛, 等. SCM435冷镦钢连续冷却过程中的组织转变及球化退火[J]. 上海金属, 2024, 46(5): 55-59.
Yu Xuesen, Li Zhanwei, Wang Jintao, et al. Structural transformation during continuous cooling and spheroidizing for SCM435 cold heading steel[J]. Shanghai Metals, 2024, 46(5): 55-59.
[9]何茜. 基于超快冷的35CrMo钢组织性能优化[D]. 沈阳: 东北大学, 2020.
He Qian. Microstructure and property optimization of 35CrMo steel based on ultra-fast cooling[D]. Shenyang: Northeastern University, 2020.
[10]魏宝民, 穆海玲, 周丽萍. 塑性变形和退火温度对SCM415组织和性能的影响[J]. 热加工工艺, 2015, 44(8): 191-193.
Wei Baomin, Mu Hailing, Zhou Liping. Effects of plastic deformation and annealing temperature on microstructure and properties of SCM415[J]. Hot Working Technology, 2015, 44(8): 191-193.
[11]李战卫, 于学森, 沈奎, 等. 高强度汽车紧固件用钢SCr440连续冷却和等温冷却组织转变研究及应用[J]. 特殊钢, 2022, 43(2): 90-94.
Li Zhanwei, Yu Xuesen, Shen Kui, et al. Study on continuous cooling and isothermal cooling microstructure transformation of high strength steel SCr440 for automotive fasteners and application[J]. Special Steel, 2022, 43(2): 90-94.

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高强度汽车紧固件用SCM415H钢的组织转变

Microstructure transformation of SCM415H steel for high strength automotive fasteners

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