电焊机2024，Vol.54Issue(4)：13-22,10.DOI:10.7512/j.issn.1001-2303.2024.04.02
316L不锈钢MIG电弧增材制造中焊道成形尺寸的关键影响因素及优化策略
Key Influencing Factors and Optimization Strategies for Weld Bead For-mation Size in 316L Stainless Steel MIG Arc Additive Manufacturing
摘要
Abstract
The study aims to investigate the impact of process parameters under different current modes on the weld bead formation size in 316L stainless steel MIG arc additive manufacturing.Firstly,the control variable method was used to study the influence of base plate temperature,welding current,welding speed,and line energy on the weld bead formation size un-der constant current mode.Subsequently,the orthogonal test method was employed to study the impact of welding current,welding speed,duty cycle,and pulse frequency on the weld bead formation size under pulsed current,and a multiple linear regression method was utilized to construct a predictive model of process parameters(welding current,welding speed,duty cycle,pulse frequency)and weld bead dimensions(melt width and residual height).The results showed that under the con-stant current mode,the formation morphology was better when the welding current was 150 A,the welding speed was 4 mm/s,and the base plate temperature was controlled between 100～150°C.Under the pulsed current mode,the best weld bead for-mation was achieved with a welding current of 140 A,welding speed of 3 mm/s,duty cycle of 0.8,and pulse frequency of 3 Hz.The formation effect was poorer when the line energy exceeded 7 242 J/cm.Additionally,a multiple linear regression model for the process parameters and the weld bead dimensions(melt width and residual height)under pulsed current was established,and the regression model was verified to accurately predict the weld bead formation size.关键词
电弧增材制造/工艺参数/成形质量/回归模型Key words
arc additive manufacturing/technological parameter/forming quality/regression model分类
矿业与冶金引用本文复制引用
李子葳,杨洪才,刘浩民,孙俊华,张元彬..316L不锈钢MIG电弧增材制造中焊道成形尺寸的关键影响因素及优化策略[J].电焊机,2024,54(4):13-22,10.基金项目
山东省自然科学基金(ZR2020ME152) （ZR2020ME152）
