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| 45 钢表面激光合金化组织分析及硬度测试 |
| Microstructure Analysis and Hardness Test of Laser Alloying on 45 Steel Surfaces |
| Received:February 20, 2015 Revised:May 10, 2015 |
| DOI：10.3969/j.issn.1674-6457.2015.03.011 |
| 中文关键词: 激光合金化 显微组织 冶金结合 硬度 |
| 英文关键词: laser alloying microstructure metallurgical bonding hardness |
| 基金项目:四川省德阳市重点科学技术研究项目(2014ZZ095-4) |
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| 中文摘要: |
| 目的 为了提高 45 钢表面性能,采用 CO2 激光器对其表面进行合金化处理。 方法 利用带有能谱的扫描电子显微镜(SEM/ EDS)、金相显微镜、X 射线衍射仪、显微/ 维氏硬度计、扫描电镜等,对合金化层组织及性能进行了观察和分析。结果 激光合金化层由合金化区、结合区和热影响区 3 部分组成,涂层与基体呈冶金结合;涂层主要含 Cr3C2,FeNi3,Cr23C6,Fe3C 相;激光合金化层的显微硬度达 1032 HV,约为基体的 3. 5 倍。 结论 45 钢经激光合金化处理,可改善其表面性能,显著提高其硬度。 |
| 英文摘要: |
| In order to improve the surface properties of 45 steel, alloying treatment was carried out on its surface by CO2 laser. The microstructure and properties of the alloying layer were researched by means of scanning electron microscope with energy spectrum (SEM/ EDS), metallographic microscope, X-ray diffractometer and microscopic/ Vickers hardness tester. The coatings of laser alloying layer were constituted by alloying zone, bonding zone and heat affected zone, and the combination between the coating and the substrate was metallurgical. Cr3C2, FeNi3, Cr23C6 and Fe3C were the main phases in the alloying layer. The microhardness of the laser alloying layer reached 1032 HV, which was about 3. 5 times that of the substrate. After laser alloying treatment, the surface properties of 45 steel were improved and the hardness was significantly increased. |
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