| 40Cr钢汽车半轴淬火缺陷分析及热处理工艺改进 |
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| 引用本文： | 高为国,董丽君,胡凤兰,覃波.40Cr钢汽车半轴淬火缺陷分析及热处理工艺改进[J].湖南工程学院学报(自然科学版),2008,18(4):33-36. |
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| 作者姓名： | 高为国 董丽君 胡凤兰 覃波 |
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| 作者单位： | 湖南工程学院,机械工程学院,湘潭,411101 |
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| 基金项目： | 湖南省自然科学基金
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| 摘 要： | 根据40Cr钢汽车半轴的实际淬火工艺，分析了淬火开裂的主要原因，并针对淬火开裂的主要形式，制定出了三种热处理工艺方案并实施．通过分析热处理后的金相显微组织和硬度数据，确定出最终的热处理工艺及其主要参数．试验结果表明：40Ct钢在860℃油淬后，再进行860℃淬入5％～10％的盐水冷却、580℃回火，使强度、硬度低的网状铁素体相对量有所下降，可有效的防止淬火开裂，并提高其疲劳寿命．
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| 关 键 词： | 汽车半轴 淬火开裂 热处理工艺 力学性能 显微组织 |
Analysis of Quenching Cracking and Improvement of Heat Treatment Process for Steel 40Cr Axle Vehicle |
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| GAO Wei-guo,DONG Li-jun,HU Feng-lan,QIN Bo.Analysis of Quenching Cracking and Improvement of Heat Treatment Process for Steel 40Cr Axle Vehicle[J].Journal of Hunan Institute of Engineering(Natural Science Edition),2008,18(4):33-36. |
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| Authors: | GAO Wei-guo DONG Li-jun HU Feng-lan QIN Bo |
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| Institution: | (College of Mech. Eng. , Hunan Institute of Engineering, Xiangtan 411101, China) |
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| Abstract: | According to the actual quenching process of steel 40Cr axle vehicle, the main reasons for its quenching cracking are analyzed. Considering the main forms of quenching cracking, three kinds of heat treatment processes are implemented. Based on the microstructure state and the hardness data after heat treatment, the final heat treatment process and its main parameters are determined. The results show that after 860 ℃ oil quenching, and then 860 ℃ quenching with 5% to 10% of salt water cooling and 580 ℃ tempering, the strength and hardness of the ferrite in steel 40Cr are reduced relatively, which effectively prevents quenching from cracking and improves the fatigue life. |
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| Keywords: | axle vehicle quenching cracking heat treatment process mechanical properties microstructure |
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