| 引用本文: | 戴明阳,魏坤霞,陈尧,宋仁国,孙斐,胡静.空气预氧化与盐浴预氧化对盐浴渗氮催渗效果的对比[J].中国表面工程,2016,29(6):38~43 |
| DAI Ming-yang,WEI Kun-xia,CHEN Yao,SONG Ren-guo,SUN Fei,HU Jing.Comparision of Enhancement Effect Between Air Pre-oxidation and Salt Bath Pre-oxidation on Salt Bath Nitriding[J].China Surface Engineering,2016,29(6):38~43 |
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| 空气预氧化与盐浴预氧化对盐浴渗氮催渗效果的对比 |
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戴明阳1, 魏坤霞1,2, 陈尧1, 宋仁国1,2, 孙斐3, 胡静1,2
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1.常州大学 江苏省表面科学与技术重点实验室, 江苏 常州 213164;2.常州大学 江苏省光伏科学与工程协同创新中心, 江苏 常州 213164;3.常州轻工职业技术学院 机械工程系, 江苏 常州 213164
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| 摘要: |
| 以45钢为试验材料，采用空气炉和盐浴炉两种方式进行预氧化，随后进行相同工艺的盐浴渗氮处理。对比分析两种预氧化方式对盐浴渗氮效率和组织性能的影响。利用光学显微镜、X射线衍射仪、显微硬度计、电化学工作站和扫描电镜对样品的显微组织、物相、硬度、耐蚀性和表面形貌进行了测试和分析。预氧化试样表层物相分析发现，盐浴预氧化和空气预氧化处理45钢表面均形成含有Fe3O4的氧化膜，但是随着保温时间延长盐浴预氧化处理试样表面氧化膜中的Fe3O4含量增速更快、含量更高，且具有更大的比表面积，在随后的渗氮处理中容易被还原。盐浴预氧化（350℃×45 min）后进行盐浴渗氮（560℃×120 min），化合物层厚度达到了20.8 μm，显著地提高盐浴渗氮效率，是相同工艺参数空气预氧化后盐浴渗氮所获得化合物层厚的1.6倍。同时能改善渗层组织性能，耐腐蚀性能提高。 |
| 关键词: 预氧化 盐浴渗氮 显微结构 硬度 耐蚀性 |
| DOI：10.11933/j.issn.1007-9289.2016.06.006 |
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| 基金项目:江苏省研究生创新基金（SCZ100431322）；江苏省科技成果转化项目（BA2013078） |
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| Comparision of Enhancement Effect Between Air Pre-oxidation and Salt Bath Pre-oxidation on Salt Bath Nitriding |
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DAI Ming-yang1, WEI Kun-xia1,2, CHEN Yao1, SONG Ren-guo1,2, SUN Fei3, HU Jing1,2
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1.Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou 213164, Jiangsu;2.Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, Jiangsu;3.Department of Mechanical Engineering, Changzhou Institute of Light Industry Technology, Changzhou 213164, Jiangsu
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| Abstract: |
| 45 carbon steel was selected as the testing material and rapid salt bath pre-oxidation nitriding was compared with normal air pre-oxidation nitriding. Optical microscopy (OM), X-ray diffraction (XRD), micro-hardness testing, electrochemical workstation and scanning electron microscope (SEM) were employed to analyze the microstructure, phase, micro-hardness, corrosion resistance and surface morphology. The results show that Fe3O4 phase is formed on the sample surface after different pre-oxidation process. However, the relative amount of Fe3O4 treated by salt bath pre-oxidation is higher than that treated by normal air pre-oxidation. Meanwhile, the sample treated by salt bath pre-oxidation has higher specific surface area than that treated by air pre-oxidation, which is beneficial to be reduced. The maximum compound layer with a thickness of 20.8 μm is obtained after nitriding at 560℃ for 120 min under the optimum pre-oxidation condition of 350℃ and 45 min, which is more than 1.6 times thicker than that by normal air pre-oxidation, and the corrosion resistance treated by salt bath pre-oxidation is further enhanced. |
| Key words: pre-oxidation salt bath nitriding microstructure hardness corrosion resistance |
