激光熔覆工艺参数对熔覆层表面平整度的影响

Effect of Process Parameters on Surface Smoothness in Laser Cladding

为了获得平整的熔覆层表面质量,对316L不锈钢激光熔覆工艺参数对熔覆层表面平整度、平宽比(表面平整度与单层熔覆宽度比值)及平高比(表面平整度与单层熔覆高度的比值)的影响进行了实验研究。分析了单层熔覆宽度、单层熔覆高度与轨迹间的中心距及搭接率之间的相互关系,并进行了单层熔覆宽度、单层熔覆高度及表面平整度的测试。实验结果表明,随激光功率增大、送粉量增大及扫描速度的减低,熔覆层表面的平整程度降低;随载气流量增大,熔覆层表面的平整程度先增加后降低。

To obtain the smooth surface quality of cladding layer,the effects of process parameters on surface smoothness and the ratios of the width and height of cladding layer to surface smoothness were studied by experiments in laser cladding.The relationships of the height and width of cladding layer with center distance and overlapping ratio were analyzed,and the height,width and surface smoothness of cladding layer were tested.The experimental results indicate that the degree of surface smoothness decreases with the increase of laser power and powder mass flow rate and the reducing of traverse speed;the degree of surface smoothness firstly increased then decreased with the growth of carrier gas flow rates.