基于30CrNi2MoVA的激光熔化沉积工艺参数研究

Process Parameters of Laser Melting Deposition Based on 30CrNi2MoVA

使用30CrNi2MoVA钢粉末在激光熔化沉积设备上进行了相应的工艺研究,探索了激光功率与扫描速度对沉积层宽度和高度的影响,并对工艺参数与沉积尺寸进行了回归分析,建立了相应的回归模型,确立了工艺参数对沉积尺寸的影响规律。其中激光功率与沉积层的高度、宽度呈正相关,而扫描速度与沉积层的高度、宽度呈负相关。根据沉积层尺寸的标准差和沉积质量对线能量密度K进行分析,发现K值在85~200 J/mm沉积质量较好。在获取沉积尺寸过程中,采用了激光轮廓仪进行测量,其优点在于获取数据量大且精度较高,可为沉积质量判断、尺寸预测等进一研究提供充足数据。

This paper studied the process of laser melting deposition(LMD)equipment by using 30CrNi2MoVA steel powder and explored the influence of laser power and scanning speed on the width and height of deposition layer.Regression analysis was formulated to analyze the process parameters and deposition size.The corresponding regression model was established,and the influence law of process parameters on deposition size was assured.There is evidence of a positive relationship between the laser power and the height and width of the deposition layer,and a negative relationship between the scanning speed and the height and width of the deposition layer.According to the standard deviation of deposit size and deposition quality,the linear energy density K is analyzed,and it is found that the deposition quality is better in the range of 85~200 J/mm.To measure the deposition size,laser profilometer is used,which has the advantages of large amount of data and high precision,and can provide sufficient data for further study of deposition quality evaluation and size prediction.