金属热处理 ›› 2025, Vol. 50 ›› Issue (9): 191-194.DOI: 10.13251/j.issn.0254-6051.2025.09.030

• 工艺研究 • 上一篇    下一篇

淬火温度对斗齿用35CrMnSi2钢组织与性能的影响

何苗1, 武晓峰1, 董志强1, 王端2, 索忠源1,3   

  1. 1.南昌工学院 机械与车辆工程学院, 江西 南昌 330108;
    2.上交(徐州)新材料研究院有限公司, 江苏 徐州 320312;
    3.吉林化工大学 机电工程学院, 吉林 吉林 132022
  • 收稿日期:2025-03-21 修回日期:2025-06-17 出版日期:2025-09-25 发布日期:2025-10-13
  • 通讯作者: 索忠源,教授,博士,E-mail: zhy_suo@126.com
  • 作者简介:何 苗(1984—),男,教授,硕士,主要研究方向为金属材料, E-mail:hem312@163.com。
  • 基金资助:
    江西省教育厅科技课题(GJJ212522);江苏省科技计划(BE2023047);吉林化工学院项目(21216)

Influence of quenching temperature on microstructure and properties of 35CrMnSi2 steel for bucket teeth

He Miao1, Wu Xiaofeng1, Dong Zhiqiang1, Wang Duan2, Suo Zhongyuan1,3   

  1. 1. School of Mechanical and Automotive Engineering, Nanchang Institute of Science and Technology, Nanchang Jiangxi 330108, China;
    2. Shangjiao (Xuzhou) New Materials Research Institute Co., Ltd., Xuzhou Jiangsu 320312, China;
    3. College of Mechanical and Electrical Engineering, Jilin University of Chemical Technology, Jilin Jilin 132022, China
  • Received:2025-03-21 Revised:2025-06-17 Online:2025-09-25 Published:2025-10-13

摘要: 利用光学显微镜、扫描电镜、洛氏硬度计和拉伸测试等试验方法,研究了800~960 ℃×1 h水淬+190 ℃×2 h低温回火对斗齿用35CrMnSi2钢组织与学性能的影响。结果表明,随着淬火温度的升高,回火态35CrMnSi2钢的强度、硬度先增加后降低。当淬火温度为880 ℃时,其显微组织为细小的板条状回火马氏体,此时钢的力学性能最优,其硬度最大(55 HRC),抗拉强度最高(1918.0 MPa),性能优于现场使用斗齿产品。但随着淬火温度继续升高到960 ℃,因钢中粗大的回火马氏体和残留奥氏体,从而导致其硬度和抗拉强度同时下降。

关键词: 斗齿, 合金钢, 热处理, 显微组织, 力学性能

Abstract: Effects of heat treatment, consisting of water quenching at 800-960 ℃ for 1 h followed by low-temperature tempering at 190 ℃ for 2 h, on the microstructure and mechanical properties of 35CrMnSi2 steel used for bucket teeth were investigated by means of optical microscope, scanning electron microscope, Rockwell hardness testing, and tensile testing. The results show that with the increase of quenching temperature, the strength and hardness of the tempered 35CrMnSi2 steel first increase and then decrease. When the quenching temperature is 880 ℃, the microstructure consists of fine lath tempered martensite and the steel exhibits the optimal mechanical properties with the highest hardness (55 HRC) and the highest tensile strength (1918.0 MPa), which are superior to those of the bucket teeth products in field application. However, when the quenching temperature is increased to 960 ℃, both the hardness and tensile strength of the steel decrease, which can be attributed to the formation of coarse tempered martensite and retained austenite within the microstructure.

Key words: bucket teeth, alloy steel, heat treatment, microstructure, mechanical properties

中图分类号: