激光熔铸过程中涂层物料吸收系数及输入基材热量的研究

A STUDY ON ABSORPTION COEFFICIENT OF THE COATING POWDER AND THE HEAT DEPOSITING INTO THE SUBSTRATE DURING MELTCASTING PROCESS

提出了用静态粉末床原理测量涂层表观吸收系数和输入基材热量的方法，并讨论了熔铸过程中粉末粒度、扫描速度及光束辐照状态等工艺参数对涂层表观吸收系数和输入基材热量的影响。实验结果表明，粉末粒度及光束辐照状态对涂层表观吸收系数和输入基材的热量有较大的影响。

his paper presents a method of using the principle of static powder bed to measure the apparent absorption coefficient of the coating powder and the heat depositing into the substrate during melt-casting processThe experimental results show that the powder size and irradiation parameters have a great effect on the absorption coeffcient and the amount of the heat depositing into substrate