电焊机2026，Vol.56Issue(8)：123-132,10.DOI:10.7512/j.issn.1001-2303.2026.08.13
激光功率对Q890钢-MIG复合焊接温度场及接头组织与性能的影响
Effect of Laser Power on Temperature Field and Joint Microstructure and Properties in Laser-MIG Hybrid Welding of Q890 Steel
摘要
Abstract
To investigate the effects of laser power on the temperature field,joint microstructure,and hardness distribution in laser-MIG hybrid welding of 16 mm thick Q890 high-strength steel,a finite element model for multi-pass welding tempera-ture field was established using a combined double-ellipsoid and columnar heat source model based on SYSWELD soft-ware.The influences of root weld laser power and cap weld laser power on thermal cycle characteristics,microstructural evolution,and hardness distribution of the welded joints were systematically studied.The temperature field simulation re-sults show that when the laser power for the root weld increases from 6.0 kW to 7.0 kW,the maximum temperature of the weld pool reaches 2 013℃.For the cap weld,when the laser power increases from 2.0 kW to 3.0 kW,the maximum tem-perature of the weld pool reaches 2 631℃.When the laser power for the cap weld is 2.0 kW,the microstructure in the laser zone consisted mainly of acicular ferrite,granular bainite,and a small amount of banded bainite,while the coarse grained heat affected zone(CGHAZ)is mainly composed of lath martensite and lath bainite.When the laser power for the root weld is 6.0 kW,the microstructure of the laser weld zone in the root weld primarily consists of lath martensite,while the micro-structure of the CGHAZ is mainly composed of lath martensite and lath bainite.The results indicate that with increasing la-ser power,the peak temperature of the welding pool increases,the bainite content in the laser weld zone of the cap weld de-creases,the lath bainite forms in the laser weld zone of the root weld,and the grain size in the CGHAZ increases.关键词
Q890钢/激光-MIG复合焊/温度场/复合热源模型/显微组织Key words
Q890 steel/laser-MIG hybrid welding/temperature field/hybrid heat source model/microstructure分类
矿业与冶金引用本文复制引用
张盛林,严春妍,周凌川,田展鹏,刘欣怡,梁基剑..激光功率对Q890钢-MIG复合焊接温度场及接头组织与性能的影响[J].电焊机,2026,56(8):123-132,10.基金项目
江苏省研究生科研创新计划项目(KYCX25_0909) （KYCX25_0909）
江苏省研究生科研创新计划项目(KYCX24_0826) （KYCX24_0826）
