| TC4表层激光熔覆Fe基合金层组织及性能研究 |
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| 引用本文： | 王胜,邵思程,毕少平,刘文军,吴军,余文利.TC4表层激光熔覆Fe基合金层组织及性能研究[J].激光技术,2022,46(5):653-656. |
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| 作者姓名： | 王胜 邵思程 毕少平 刘文军 吴军 余文利 |
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| 作者单位： | 1.衢州职业技术学院 机电工程学院, 衢州 324000 |
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| 摘 要： | 为了提高TC4合金部件表面的耐磨耐腐蚀性, 采用数字化分析测试、金相显微形貌分析等方法, 研究分析了TC4钛合金表面激光熔覆制备Fe35A涂层的显微组织和综合性能。结果表明, 在激光功率为2.3kW、扫描速率为9mm/s、送粉速率为10g/min的最佳经验工艺参数下, TC4表层制备Fe基合金沉积层的宏观形貌最佳, 金相组织较好, 晶粒细化且均匀分布, 基体与沉积层熔合度高; 沉积层表面洛氏硬度高达40.2HRC, 显微硬度平均高达645.5HV, 沉积层整体力学性能明显高于基体组织。该研究为TC4钛合金表面的高质量修复和再利用提供了实践参考。
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| 关 键 词： | 激光技术 Fe35A合金 硬度 显微形貌 金相组织 TC4合金 |
| 收稿时间： | 2021-08-23 |
Study on microstructure and properties of laser cladding Fe-based alloy layer on TC4 surface |
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| Abstract: | In order to improve the wear resistance and corrosion resistance of TC4 alloy parts, the microstructure and comprehensive properties of laser cladding Fe35A coating on TC4 titanium alloy were analyzed through digital analysis and metallographic analysis. The results show that under the optimum parameters of laser power of 2.3kW, scanning speed of 9mm/s, and powder feeding rate of 10g/min, the best macro-morphology and good microstructure of the surface layer of TC4 is obtained. The Fe grain is refined, and the distribution is uniform. The high fusion degree between substrate and deposit is observed. The Rockwell hardness of the deposition layer is up to 40.2HRC, and the microhardness is up to 645.5HV. The overall mechanical properties of the deposition layer are obviously higher than that of the matrix. This research provides practical reference for the high quality repair and reuse of TC4 titanium alloy surface. |
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