激光与光电子学进展, 2018, 55 (4): 043102, 网络出版: 2018-09-11
脉冲电流对激光熔覆层力学及耐腐蚀性能的影响 下载: 962次
Effect of Pulsed Current on Mechanical and Anticorrosion Properties of Laser Cladded Coating
薄膜 激光熔覆 脉冲电流 Ni-Cr-Mo合金涂层 硬度 耐腐蚀性能 thin films laser cladding pulsed current Ni-Cr-Mo alloy coating hardness anticorrosion property
摘要
采用连续半导体激光器在Q235钢表面制备了Ni-Cr-Mo合金涂层,在不同脉冲电流处理时间下对涂层进行了辅助热处理,提高了涂层的质量及性能,并研究了涂层的显微组织、相组成、力学及耐腐蚀性能。结果表明,脉冲电流处理促进了激光熔覆层表面晶界处共晶组织的析出;随着处理时间的增大,共晶组织的析出量增大,距涂层表面约0.1 mm范围内的硬度也增大,而涂层的耐腐蚀性先增大后减小。
Abstract
Ni-Cr-Mo alloy coatings are prepared on Q235 steel surface by using a continuous diode laser. The assisted thermal treatments of these coatings are made under pulsed currents with different processing time, which improves the quality and property of coatings. The microstructure, phase composition as well as the mechanical and anticorrosion properties of coatings are investigated. The results show that the pulsed current processing is beneficial to promoting the precipitation of eutectic structures on the grain boundaries of laser cladded coatings. The precipitation amount of eutectic structures increases with the increase of processing time, and the hardness within the depth around 0.1 mm away from the coating surface increases as well, however, the anticorrosion property of coatings increases first and then decreases.
西宇辰, 朱建波, 刘双, 唐怡荣, 王勤英, 白树林. 脉冲电流对激光熔覆层力学及耐腐蚀性能的影响[J]. 激光与光电子学进展, 2018, 55(4): 043102. Yuchen Xi, Jianbo Zhu, Shuang Liu, Yirong Tang, Qinying Wang, Shulin Bai. Effect of Pulsed Current on Mechanical and Anticorrosion Properties of Laser Cladded Coating[J]. Laser & Optoelectronics Progress, 2018, 55(4): 043102.