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

doi:10.20057/j.1003-8620.2024-00115

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

• Smelting and Solidification • Previous Articles Next Articles

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 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 Online:2025-02-01 Published:2025-01-16
About author:时大方（1962—），男，硕士，教授级高级工程师

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 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

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）

Abstract

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

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

CLC Number:

TG142.21

Shi　Dafang, Yang　Jun, Liu　Dong, Wang　Hui, Zhang　Wanli, Yu　Feng, Cao　Wenquan. Effect of Aluminum Content on Microstructure and Properties of Fe-1.4C-1.5Cr-Alx Steel[J]. Special Steel, 2025, 46(1): 54-58.

时大方, 杨军, 刘东, 王辉, 张万里, 俞峰, 曹文全. Al含量对Fe-1.4C-1.5Cr-Alx钢组织及性能的影响[J]. 特殊钢, 2025, 46(1): 54-58.

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

Al含量对Fe-1.4C-1.5Cr-Alx钢组织及性能的影响

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