电焊机2025，Vol.55Issue(2)：39-45,7.DOI:10.7512/j.issn.1001-2303.2025.02.04
激光功率对CMT电弧增材制造316L不锈钢组织与性能的影响
Influence of Laser Power on the Microstructure and Properties of 316L Stainless Steel Fabricated by CMT Arc Additive Manufacturing
摘要
Abstract
This study aims to investigate the effect of laser power on the microstructure and properties of 316L stainless steel fabricated by CMT arc additive manufacturing,providing a theoretical basis for optimizing the technology to produce 316L stainless steel components.316L stainless steel welding wire was used as the raw material,and single-wall samples were pre-pared under different laser powers using CMT arc additive manufacturing.The microstructure,phase composition,hardness,and tensile properties of the samples were analyzed using optical microscopy,scanning electron microscopy,energy spec-trometer,Vickers hardness tester,and tensile testing machine.The results show that laser power has a significant impact on the microstructure and properties of 316L stainless steel.The microstructure of 316 stainless steel single-wall is mainly com-posed of δ-ferrite and γ-austenite,with the central region being dendritic crystals.As the laser power increases,the distance between dendritic crystals increases,the content of δ-ferrite first increases and then decreases,the tensile strength first in-creases and then decreases,and the elongation rate gradually decreases.When the laser power is 400 W,the content of δ-fer-rite in the single-wall is the highest.Since δ-ferrite has the effect of hindering grain boundary movement to improve strength,its tensile strength reaches a maximum value of 561.8 MPa,and it can maintain 48.7%plasticity.At the same time,the hardness value of the single-wall shows a slight downward trend along the stacking direction,and when the laser power is 400 W,the Vickers hardness reaches a maximum value of 194.7 HV0.3.关键词
激光功率/增材制造/316不锈钢/微观组织/力学性能Key words
laser power/additive manufacturing/316 stainless steel/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
陈大林,宋学平,赵青山,高晓菲..激光功率对CMT电弧增材制造316L不锈钢组织与性能的影响[J].电焊机,2025,55(2):39-45,7.基金项目
甘肃省教育厅高校教师创新基金项目(2023A-214) （2023A-214）
