| 热处理工艺对ER7车轮钢力学性能的影响 |
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| 引用本文： | 霍雄勃,党淑娥,赵家兴,张晓峰,陈莹,朱雪彤.热处理工艺对ER7车轮钢力学性能的影响[J].金属热处理,2021,46(3):51-55. |
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| 作者姓名： | 霍雄勃 党淑娥 赵家兴 张晓峰 陈莹 朱雪彤 |
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| 作者单位： | 1.太原科技大学 材料科学与工程学院, 山西 太原 030024; 2.太原重工轨道交通设备有限公司 技术中心, 山西 太原 030032 |
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| 基金项目： | 山西省重点研发计划(201703D111005)。 |
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| 摘 要： | ER7车轮钢经不同工艺热处理后,可获得珠光体片层间距以及铁素体含量不同的显微组织,并对不同工艺处理试样的拉伸性能及－20 ℃冲击性能进行了测试。结果表明,随冷却速度的增大,车轮钢铁素体含量增加,珠光体片间距和珠光体球团尺寸减小。增大冷却速率,会使车轮钢的屈服强度、抗拉强度、伸长率和断面收缩率都随之增加。随着珠光体片间距和晶粒尺寸减小,车轮钢的断裂韧性也相应增大。在850 ℃加热并通过水雾冷却后的车轮钢试样强韧匹配最好,综合力学性能最好。
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| 关 键 词： | ER7车轮钢 热处理工艺 显微组织 力学性能 |
| 收稿时间： | 2020-11-10 |
Effect of heat treatment process on mechanical properties of ER7 wheel steel |
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| 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. |
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| Authors: | Huo Xiongbo Dang Shu'e Zhao Jiaxing Zhang Xiaofeng Chen Ying Zhu Xuetong |
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| Affiliation: | 1. School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan Shanxi 030024, China; 2. Technology Center, Taiyuan Heavy Industry Rail Transportation Equipment Co., Ltd., Taiyuan Shanxi 030032, China |
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| 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. |
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| Keywords: | ER7wheel steel heat treatment process microstructure mechanical properties |
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