ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2025, Vol. 46 ›› Issue (1): 54-58.DOI: 10.20057/j.1003-8620.2024-00115

• 冶炼与凝固 • 上一篇    下一篇

Al含量对Fe-1.4C-1.5Cr-Alx钢组织及性能的影响

时大方1, 杨军1, 刘东1, 王辉2, 张万里2, 俞峰2, 曹文全2   

  1. 1 浙江天马轴承集团有限公司,杭州 313200;
    2 钢铁研究总院有限公司特殊钢研究院,北京 100081
  • 收稿日期:2024-04-29 出版日期:2025-02-01 发布日期:2025-01-16
  • 通讯作者: 曹文全
  • 基金资助:
    钢铁研究总院有限公司基金(所22T61150、事23T60130ZD)

Effect of Aluminum Content on Microstructure and  Properties of Fe-1.4C-1.5Cr-Alx Steel

Shi Dafang1, Yang Jun1, Liu Dong1, Wang Hui2, Zhang Wanli2, Yu Feng2, Cao Wenquan2   

  1. 1 Zhejiang Tianma Bearing Co., Ltd., Hangzhou 313200, China;
    2 Research Institute of Special Steels, Central Iron and Steel Research Institute Co., Ltd., Beijing 100081, China
  • Received:2024-04-29 Published:2025-02-01 Online:2025-01-16
  • About author:时大方(1962—),男,硕士,教授级高级工程师

摘要: 分析了添加w[Al]2%~6%后Fe-1.4C-1.5Cr-Alx超高碳钢淬回火后的微观组织结构演变和硬度变化规律。研究发现,添加Al降低了冷却时先共析碳化物的析出量,有助于抑制晶界周围网状碳化物形成;添加4%~6%Al后超高碳钢在240~400 ℃中高温回火硬度稳定在62~65HRC,添加Al元素后,试验钢回火过程中纳米级碳化物分解温度提高,耐回火稳定性提升,并且马氏体分解温度提高,w[Al]越高,超高碳钢回火稳定性及耐温性越好。

关键词: 轻质钢, 轴承钢, 含Al钢, 超高碳钢

Abstract: The microstructure evolution and hardness change of Fe-1.4C-1.5Cr-Alx ultra-high carbon steel with 2%-6% aluminum content added during quenching and tempering were analyzed. It is found that the addition of Al reduces the precipitation amount of proeutectoid carbides during cooling, and helps to inhibit the formation of network carbides around grain boundaries. After adding 4% -6% Al, the tempering hardness of ultra-high carbon steel is stable between 62HRC -65HRC at 200 ℃-400 ℃, and after adding Al element, the decomposition temperature of nanoscale carbide in the tempering process of the test steel is increased, the tempering resistance stability is improved, and the martensitic decomposition temperature is increased, and the greater the amount of Al element added, the better of the tempering stability and temperature resistance of ultra-high carbon steel.

Key words: Low Density Steel, Bearing Steel, Steel With Aluminum, Ultra-high Carbon Steel

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