焊管2025，Vol.48Issue(3)：18-22,5.DOI:10.19291/j.cnki.1001-3938.2025.03.003
钛合金激光窄间隙填丝焊接接头组织与性能研究
Research on Microstructure and Properties of Titanium Alloy Laser Narrow Gap Wire Filling Welding Joints
马照伟 1符成学 1廖志谦 2余巍 2闫晨昊 1张文豪 1杜志博 1王伟超1
作者信息
- 1. 洛阳船舶材料研究所(中国船舶集团有限公司第七二五研究所),河南 洛阳 471023
- 2. 洛阳船舶材料研究所(中国船舶集团有限公司第七二五研究所),河南 洛阳 471023||海洋腐蚀与防护全国重点实验室,河南 洛阳 471023
- 折叠
摘要
Abstract
In order to meet the performance requirements of laser narrow gap wire filler welding joint for titanium alloy thick plate,the welding test of 80 mm thick TC4 titanium alloy was carried out using the swing laser narrow gap wire filling welding technology.The microstructure and mechanical properties of the welded joint were analyzed.The results show that when the laser power is 6 kW,the defocus is+10 mm,the welding speed is 0.6 m/min,and the wire feeding speed is 3 m/min,the weld is well formed.The metallographic test results show that the welding wire has good fusion and no interlayer or sidewall fusion defects have been found.The microstructure of the weld zone consists of coarse β columnar crystals with obvious grain boundaries,and the intragranular structure consists of acicular martensite α'+intergranular β phase.The structure of the heat affected zone exhibits a clear transitional morphology.The hardness of the weld zone is higher than that of the heat affected zone and the base metal zone,and a low hardness zone appears in the heat affected zone.The hardness from the root of the weld zone to the surface of the weld varies from decrease to increase to decrease.The tensile test results show that the average tensile strength of the joint is 956 MPa,with excellent mechanical properties.关键词
钛合金厚板/窄间隙激光焊/焊接接头/微观组织/力学性能Key words
titanium alloy thick plate/narrow gap laser welding/welded joint/microstructure/mechanical property分类
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马照伟,符成学,廖志谦,余巍,闫晨昊,张文豪,杜志博,王伟超..钛合金激光窄间隙填丝焊接接头组织与性能研究[J].焊管,2025,48(3):18-22,5.
