激光熔覆铁基TiC复合涂层成形质量的控制方法

为了揭示激光熔覆工艺参数对铁基TiC复合熔覆层成形质量的作用规律、优化激光熔覆工艺参数,使用YAG固体激光器在60Si2Mn基体上激光熔覆铁基TiC复合涂层,基于响应面法建立输出电流、脉冲宽度、扫描速率与熔覆层宽度、高度、熔池深度、宽高比、稀释率以及硬度之间的数学模型,并对模型进行方差分析,获得了工艺参数与成形质量之间...

Forming quality control method of laser cladding Fe-based TiC composite coating

In order to reveal the effect of laser cladding process parameters on the forming quality of Fe based TiC composite cladding layer and optimize the laser cladding process parameters, a YAG solid-state laser was used to achieve laser cladding Fe-based TiC composite coating on 60Si2Mn substrate, and a mathematical model was established to study the influence of output current, pulse width, and scanning speed on cladding width, height, molten pool depth, aspect ratio, dilution rate, and hardness based on response surface method. Then the mathematical model was analyzed by variance analysis. And the functional relationship between process parameters and molding quality was obtained. The results show that the output current and pulse width have a positive correlation with the coating width, and the scanning speed is inversely proportional to the coating width; The scanning speed has no significant effect on the height of cladding layer and the depth of molten pool; The ratio of coating width to coating height increases with the increase of output current; The output current has the most significant effect on the coating dilution ratio, followed by the pulse width; High hardness can be obtained with higher output current and scanning speed; The error of the optimized model is less than 5%. The results can be used to predict the forming quality of Fe based ceramic composite coating and optimize the laser processing parameters.