Effect of heat treatment process on mechanical properties of ER7 wheel steel

doi:10.13251/j.issn.0254-6051.2021.03.010

Abstract

Abstract: Microstructure of ER7 wheel steel with different pearlite lamellar spacing and ferrite content was obtained by different heat treatment processes. The tensile properties and －20 ℃ impact properties were tested. The results show that as the cooling rate increases, the percentage of ferrite increases, and the pearlite lamellar spacing and pearlite pellet size decrease. Increasing the cooling rate will increase the yield strength, tensile strength, elongation and reduction of area of the wheel steel. As the pearlite lamellar spacing and grain size decrease, the fracture toughness of the wheel steel also increases accordingly. Wheel steel specimens heated at 850 ℃ and cooled by water mist have the best combination of strength and toughness and the best comprehensive mechanical properties.

Key words: ER7wheel steel, heat treatment process, microstructure, mechanical properties

CLC Number:

TG142.1

Huo Xiongbo, Dang Shu'e, Zhao Jiaxing, Zhang Xiaofeng, Chen Ying, Zhu Xuetong. Effect of heat treatment process on mechanical properties of ER7 wheel steel[J]. Heat Treatment of Metals, 2021, 46(3): 51-55.

References

[1] 高海潮,史怀言,刘国平,等.快速车轮钢的质量控制[J].钢铁,2000,35(5):26-29.
Gao Haichao,Shi Huaiyan,Liu Guoping,et al.Quality control of high speed wheel steel[J].Iron and Steel,2000,35(5):26-29.
[2] Sakamoto H,Toyama K,Hirakawa K.Fracture toughness of medium-high carbon steel for railroad wheel[J].Materials Science &Engineering A,2000,285(1/2):288-292.
[3] 龚帅,任学冲,马英霞,等.热处理工艺对高速车轮钢显微组织和断裂韧性的影响[J].材料热处理学报,2015,36(4):150-155.Gong Shuai,Ren Xuechong,Ma Yingxia,et al.Effect of heat-treatment on microstructure and fracture toughness of high-speed railway wheel steel[J].Transactions of Materials and Heat Treatment,2015,36(4):150-155.
[4] 史建平,刘忠侠,肖乾.车轮钢的化学成分、微观组织对车轮钢力学性能的影响[J].中国铁道科学,2012,33(6):44-50.
Shi Jianping,Liu Zhongxia,Xiao Qian.The effect of chemical composition,microstructure on the mechanical properties of wheel steels[J].China Railway Science,2012,33(6):44-50.
[5] 燕青芝,车延婧,洪志远,等.微观组织对车轮钢力学性能和磨损性能的影响研究[J].科技资讯,2016,14(15):177-178.
Yan Qingzhi,Che Yanjing,Hong Zhiyuan,et al.Effect of microstructure on the mechanical and wear properties of wheel steel[J].Technology Information,2016,14(15):177-178.
[6] 任学冲,李胜军,高克玮,等.热处理工艺对CL50D车轮钢晶粒度的影响[J].金属热处理,2012,37(7):7-12.
Ren Xuechong,Li Shengjun,Gao Kewei,et al.Effect of heat treatment process on grain size of wheel steel CL50D[J].Heat Treatment of Metals,2012,37(7):7-12.
[7] 胡欣,王磊,张倩,等.不同型号不锈钢根管锉的循环疲劳性能[J].中国组织工程研究,2017,21(26):4125-4130.
Hu Xin,Wang Lei,Zhang Qian,et al.Cyclic fatigue performance of different types of stainless steel root canal files[J].Chinese Journal of Tissue Engineering Research,2017,21(26):4125-4130.
[8] 魏泽民,梁宇,梁益龙,等.高碳钢中珠光体片层与先共析铁素体对断裂韧性的影响[J].材料热处理学报,2016,37(1):126-132.
Wei Zemin,Liang Yu,Liang Yilong,et al.Effect of interlamellar pearlite spacing and pro-eutectoidferrite on fracture toughness of high-carbon steel[J].Transactions of Materials and Heat Treatment,2016,37(1):126-132.
[9] Ritchie R O,Knott J F,Rice J R.On the relationship between critical tensile stress and fracture toughness in mild steel[J].Journal of the Mechanics &Physics of Solids,1973,21(6):395-410.
[10] 肖蔚荣,任学冲,陈刚,等.显微组织对高速车轮钢不同温度下断裂韧性的影响[J].材料热处理学报,2016,37(4):141-148.
Xiao Weirong,Ren Xuechong,Chen Gang,et al.Effect of microstructure on fracture toughness of high speed railway wheel steel at different temperatures[J].Transactions of Materials and Heat Treatment,2016,37(4):141-148.
[11] Chen J H,Li G,Cao R,et al.Micromechanism of cleavage fracture at the lower shelf transition temperatures of a C-Mn steel[J].Materials Science &Engineering A,2010,527(18/19):5044-5054.
[12] Alexander D J,Bernstein I M.Cleavage fracture in pearlitic eutectoid steel[J].Metallurgical Transactions A,1989,20(11):2321-2335.

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