TC4钛合金激光填丝焊接工艺研究

发布时间：2018-04-30 00:18

本文选题：TC钛合金 + 激光填丝焊　；参考：《热加工工艺》2016年19期

【摘要】：针对钛合金激光自熔焊对毛坯和装夹精度要求高,焊接后表面存在凹陷、咬边、不饱满等问题,对1 mm厚TC4钛合金进行激光填丝焊试验,研究了焊丝送入条件、离焦量和送丝速度对焊缝成形质量的影响,并优选工艺参数,分析了焊接接头的显微组织、硬度和拉伸强度。结果表明:在工艺参数为离焦量+2 mm、激光功率800 W、焊接速度20mm/s、送丝速度25 mm/s、送丝角度50°、丝光间距0 mm时进行激光填丝焊,焊缝表面未出现凹陷、不饱满等缺陷,且焊缝微观组织致密。焊接接头的平均抗拉强度为1287 MPa,大约是基材的1.32倍,比激光自熔焊提高了20.96%左右。
[Abstract]:Aiming at the problems of laser self-melting welding of titanium alloy which requires high precision of blank and clamping, the surface of titanium alloy after welding is sunken, trimmed and not full, the welding test of 1 mm thick TC4 titanium alloy is carried out, and the feeding conditions of welding wire are studied. The effects of defocus and wire feeding speed on the quality of weld formation were investigated. The microstructure, hardness and tensile strength of the welded joints were analyzed by selecting the process parameters. The results show that when the process parameters are defocus 2 mm, laser power 800 W, welding speed 20 mm / s, wire feeding speed 25 mm / s, wire feeding angle 50 掳, wire distance 0 mm, the weld surface is not sunken and full. The microstructure of the weld is compact. The average tensile strength of the welded joint is 1287 MPA, about 1.32 times of that of the substrate, which is 20.96% higher than that of laser self-fusion welding.
【作者单位】：江苏大学机械工程学院;上海普睿玛智能科技有限公司;温州大学机电工程学院;
【基金】：国家自然科学基金项目(51175237,51305050) “高档数控机床与基础制造装备”科技重大专项(2013ZX04009031-4) 科技部中俄双边政府间2014-2015科技合作项目(CR17-11) 浙江省国际科技合作专项(2013C14007) 温州市工业科技研究开发项目(J20130033) 江苏省“六大人才高峰”A类项目(1721111091)
【分类号】：TG456.7

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