| 热处理对ZG34Cr2Ni2Mo低合金钢力学性能的影响 |
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| 引用本文： | 孙晓霞,朱琳,吴兴振,郭胤,李小鸿,冯俊涛,胡娟.热处理对ZG34Cr2Ni2Mo低合金钢力学性能的影响[J].材料热处理学报,2021,42(3):120-124. |
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| 作者姓名： | 孙晓霞 朱琳 吴兴振 郭胤 李小鸿 冯俊涛 胡娟 |
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| 作者单位： | 中国劳动关系学院,北京 100048;中国航天科工防御技术研究院,北京 100039;四川航天技术研究院,四川成都 610100;安泰科技股份有限公司,北京 100081 |
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| 基金项目： | “中央高校基本业务费专项资金”项目(21ZYJS019)。 |
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| 摘 要： | 采用光学显微镜、扫描电镜、电子万能试验机和显微硬度仪等研究了正火+回火+调质热处理工艺对ZG34Cr2Ni2Mo低合金钢显微组织及力学性能的影响。结果表明:正火(870℃×3 h)+回火(600℃×5 h)+调质(淬火860℃×3 h+回火600℃×5 h)的热处理工艺有助于提高ZG34Cr2Ni2Mo低合金钢的力学性能,常温和400℃高温下,其抗拉强度分别提高了24%和16%;400℃高温下伸长率是原始铸态的2.25倍,硬度提高了8%;常温的断口形貌显示,断口由铸态时的韧窝断裂,经热处理后变为解理断裂。
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| 关 键 词： | 低合金钢 力学性能 热处理 显微组织 |
Effect of heat treatment on mechanical properties of ZG34Cr2Ni2Mo low alloy steel |
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| SUN Xiao-xia,ZHU Lin,WU Xing-zhen,GUO Yin,LI Xiao-hong,FENG Jun-tao,HU Juan.Effect of heat treatment on mechanical properties of ZG34Cr2Ni2Mo low alloy steel[J].Transactions of Materials and Heat Treatment,2021,42(3):120-124. |
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| Authors: | SUN Xiao-xia ZHU Lin WU Xing-zhen GUO Yin LI Xiao-hong FENG Jun-tao HU Juan |
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| Affiliation: | (China University of Labor Relations,Beijing 100048,China;China Aerospace Defense Technology Institute,Beijing 100039,China;Sichuan Academy of Aerospace Technology,Chengdu 610100,China;Advanced Technology&Materials Co Ltd,Beijing 100081,China) |
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| Abstract: | Effects of normalizing plus tempering plus quenching and tempering heat treatment on microstructure and mechanical properties of ZG34 Cr2 Ni2 Mo low alloy steel were studied by means of optical microscope,scanning electron microscopy,electronic universal testing machine and microhardness tester.The results show that the heat treatment process of normalizing(870℃×3 h)plus tempering(600℃×5 h)plus quenching and tempering(quenching at 860℃for 3 h and then tempering at 600℃for 5 h)can improve the mechanical properties of the ZG34 Cr2 Ni2 Mo low alloy steel,and at room temperature and 400℃,the tensile strength increases by 24%and 16%,respectively.The elongation at high temperature of 400℃of the steel after heat treatment is 2.25 times that of the as-cast steel,and the hardness increases by 8%.The fracture surface morphology at room temperature shows that the fracture made of the steel changes from dimple fracture in as-cast state to cleavage fracture after heat treatment. |
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| Keywords: | low alloy steel mechanical property heat treatment microstructure |
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