| 回火温度对V-N微合金化铸钢组织及性能的影响 |
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| 引用本文： | 王晓东,陈蕴博,左玲立,毛丰,张程,陈冲,王舒,崔海林.回火温度对V-N微合金化铸钢组织及性能的影响[J].金属热处理,2022,47(10):19-23. |
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| 作者姓名： | 王晓东 陈蕴博 左玲立 毛丰 张程 陈冲 王舒 崔海林 |
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| 作者单位： | 1.中国机械科学研究总院集团有限公司, 北京 100083;2.河南科技大学 金属材料磨损控制与成型技术国家地方联合工程研究中心, 河南 洛阳 471000;3.瞬态冲击技术重点实验室, 北京 102202 |
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| 基金项目： | 国家重点研发计划(2020YFB2008400);河南省重点研发与推广专项(222102230059);瞬态冲击技术重点实验室基金资目(6142606211110) |
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| 摘 要： | 采用真空熔炼炉制备了两种不同V含量的微合金化铸钢,并对其进行了正火+淬火+不同温度回火处理,研究了回火温度对试验钢组织及性能的影响。结果表明,V含量的增加促进了碳氮化物的析出,降低了C、N在马氏体中的固溶度,使铸钢的冲击吸收能量有所提高。当回火温度低于400 ℃时,强化机制以固溶强化为主,当回火温度高于400 ℃时,强化机制以析出强化为主。V含量的增加还促进了碳氮化物在高温回火时由短杆状向球状的转变,从而有效改善了高温回火脆性。
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| 关 键 词： | 微合金化 回火 硬度 冲击吸收能量 |
| 收稿时间： | 2022-04-29 |
Effect of tempering temperature on microstructure and properties of V-N microalloyed cast steel |
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| Wang Xiaodong,Chen Yunbo,Zuo Lingli,Mao Feng,Zhang Cheng,Chen Chong,Wang Shu,Cui Hailin.Effect of tempering temperature on microstructure and properties of V-N microalloyed cast steel[J].Heat Treatment of Metals,2022,47(10):19-23. |
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| Authors: | Wang Xiaodong Chen Yunbo Zuo Lingli Mao Feng Zhang Cheng Chen Chong Wang Shu Cui Hailin |
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| Affiliation: | 1. China Academy of Machinery Science and Technology Group Co., Ltd., Beijing 100083, China;2. National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials, Henan University of Science and Technology, Luoyang Henan 471000, China;3. Science and Technology on Transient Impact Laboratory, Beijing 102202, China |
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| Abstract: | Two microalloyed cast steels with different V contents were prepared in a vacuum melting furnace and heat treated by normalizing, quenching and tempering at different temperatures. Effect of tempering temperature on microstructure and properties of the two tested steels with different V contents was studied. The results show that the effect of V content promotes the carbonitride precipitates and reduces the solid solubility of C and N elements in the martensite, resulting in the improvement of impact absorbed energy. When tempering temperature is below 400 ℃, the dominant strengthening mechanism is solution strengthening. When tempering temperature is above 400 ℃, the dominant strengthening mechanism is precipitation hardening. The increase of V content also promotes the carbonitride precipitates shape translating from short rod to granular, and the brittleness of high temperature tempering is improved. |
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| Keywords: | microalloying tempering hardness impact absorbed energy |
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