摘要
针对目前激光熔覆层形貌尺寸的预测计算复杂,耗费的成本高,不适用于工程应用的问题,采用Nd:YAG脉冲激光器在Cr12MoV模具钢上进行激光熔覆试验,用多元线性回归方程建立起以激光电流、扫描速度和激光脉宽为预测变量,熔覆层宽度和高度为响应变量的多参数耦合数学模型,并将试验结果与线性回归方程预测的结果进行了比较。结果表明:熔覆层宽度和高度的试验值和预测值之间的误差分别可以精确到0.86%和0.49%,且该模型在其他不同工艺参数下的预测分析中得以验证。利用多元线性回归方程可以很好地表征多参数耦合下激光熔覆层的形貌尺寸,并且该方法简单高效,运算逻辑清晰。
In order to solve the problem that the prediction of the morphology and size of laser cladding layer was complicated,the cost was high,and it was not suitable for engineering application,the laser cladding experiment was carried out by using Nd:YAG pulse laser on the steel of Cr12MoV mold.A multi-parameter coupling mathematical model with laser current,scanning speed and laser pulse width as the predictive variables and the width and height of the cladding layer as the response variables was established by using multiple linear regression equation.The experimental results were compared with those predicted results by the linear regression equation.The results show that the error between the experimental values and the predicted values of the cladding layer width and height can be accurate to 0.86%and 0.49%,respectively,and the model can be verified in the prediction analysis of other different process parameters.The morphology and size of laser cladding layer under multi parameter coupling can be well characterized by multiple linear regression equation,and the method is simple,efficient and the operation logic is clear.
作者
刘越
叶宏
李礼
佘红艳
屈威
杨柳
LIU Yue;YE Hong;LI Li;SHE Hong-yan;QU Wei;YANG Liu(School of Materials Science and Engineering,Chongqing University of Technology,Chongqing 400054,China;Chongqing University Key Laboratory of Mould Technology,Chongqing 400054,China)
出处
《材料热处理学报》
CAS
CSCD
北大核心
2021年第11期140-146,共7页
Transactions of Materials and Heat Treatment
基金
重庆理工大学研究生创新基金(clgycx 20203022)
重庆市大学生创新创业训练计划项目(2019CX001)。
关键词
激光熔覆
形貌预测
回归分析
多参数耦合
laser cladding
prediction of geometrical characteristics
regression analysis
multi-parameter coupling
