论文部分内容阅读
采用2 k W半导体激光器在304不锈钢表面进行同轴送粉的激光熔覆Co基合金试验。通过扫描电镜(SEM)、X射线衍射仪(XRD)研究了不同扫描速度下熔覆层的显微组织和相结构;采用显微硬度计、摩擦磨损试验机和气蚀装置分别测试了不同扫描速度下熔覆层的显微硬度、耐磨性与抗气蚀性能。结果表明,不同激光扫描速度下合金涂层皆无裂纹与气孔,随着扫描速度增加,合金涂层的硬度、耐磨性能与抗气蚀性能则先增强后降低,在激光扫描速度为900 mm/min时,合金涂层具有较好的硬度、耐磨性和抗气蚀性能。
Laser cladding Co-based alloy test on the surface of 304 stainless steel using 2 k W semiconductor laser. The microstructure and phase structure of cladding layer were investigated by scanning electron microscope (SEM) and X-ray diffractometer (XRD). The microstructure and phase structure of cladding layer under different scanning velocities were investigated by using microhardness tester, friction and wear tester and cavitation device. Under the cladding layer of microhardness, wear resistance and cavitation resistance. The results show that there are no cracks and pores in the alloy coating at different laser scanning speeds. The hardness, wear resistance and cavitation resistance of the alloy coating first increase and then decrease with the increase of scanning speed. When the laser scanning speed is 900 mm / min, the alloy coating has good hardness, wear resistance and cavitation resistance.