金属热处理 ›› 2022, Vol. 47 ›› Issue (7): 151-155.DOI: 10.13251/j.issn.0254-6051.2022.07.027

• 工艺研究 • 上一篇    下一篇

新型贝氏体板簧钢的组织及性能

蒋文淼, 胡志华, 栾道成, 张旭, 凌俊华, 阴志铭, 李缘, 周新宇, 王正云   

  1. 西华大学 材料科学与工程学院, 四川 成都 610039
  • 收稿日期:2022-02-09 修回日期:2022-05-07 出版日期:2022-07-25 发布日期:2022-08-12
  • 通讯作者: 胡志华,副教授,硕士,E-mail:1443963462@qq.com
  • 作者简介:蒋文淼(1998—),男,硕士研究生,主要研究方向为贝氏体钢,E-mail:1057331456@qq.com。
  • 基金资助:
    四川省科技支撑项目(20ZDYF2461, 20ZDZX0042);西华大学重点科研基金(Z203121);西华大学创新基金(YCJJ2021033)

Microstructure and properties of new type bainitic leaf spring steel

Jang Wenmiao, Hu Zhihua, Luan Daocheng, Zhang Xu, Ling Junhua, Yin Zhiming, Li Yuan, Zhou Xinyu, Wang Zhengyun   

  1. School of Materials Science and Engineering, Xihua University, Chengdu Sichuan 610039, China
  • Received:2022-02-09 Revised:2022-05-07 Online:2022-07-25 Published:2022-08-12

摘要: 针对汽车减重和环保问题,自行设计研制了车用新型贝氏体板簧钢,并对其组织和力学性能进行研究。结果表明,该钢经正火热处理即可得到无碳贝氏体组织;XRD检测表明,其物相组成以α相为主;该钢具有优良的综合力学性能和耐腐蚀性能,屈服强度近1200 MPa,抗拉强度达1400 MPa,常温下,冲击吸收能量达到73.2 J以上,强韧性配比优异。

关键词: 贝氏体钢, 汽车板簧, 显微组织, 韧性, 硬度

Abstract: Aiming at the problems of automobile weight reduction and environmental protection, a new type of bainitic leaf spring steel for automobiles was designed and developed, and the microstructure and mechanical properties were studied. The results show that the carbide-free bainitic microstructure of the steel can be obtained by normalizing. XRD test results show that its phase composition is dominated by α phase; The steel has excellent comprehensive mechanical properties and corrosion resistance, with yield strength of nearly 1200 MPa, tensile strength of 1400 MPa, impact absorbed energy of 73.2 J or more at room temperature, and excellent match of strength and toughness.

Key words: bainitic steel, automobile leaf spring, microstructure, toughness, hardness

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