CAJ | 학술논문

采用激光氩弧复合焊技术焊接 ZM5镁合金，研究激光氩弧复合焊与钨极氩弧焊对镁合金焊缝成形性与力学性能的影响。成形性分析表明：在焊接速度为5、15 mm／s 时，激光氩弧复合焊能得到良好的焊缝，且无气孔缺陷；而钨极氩弧焊不适于高速焊接，且气孔缺陷明显。抗拉强度分析表明：激光氩弧复合焊缝平均抗拉强度为246 MPa，屈服强度为94．53 MPa，断裂伸长率为2．48％，均大于钨极氩弧焊，且2种焊缝均呈韧性脆性混合断裂。硬度测试分析表明：激光氩弧复合焊缝区平均硬度为63 HV0．05，热影响区硬度值与母材区相当，约为55 HV0．05，均高于钨极氩弧焊的硬度。上述分析说明：激光的干预有利于提高镁合金焊缝成形性和力学性能，适用于焊接速度要求高、情况紧急时的焊接，这为装备镁合金零部件体积和结构损伤的修复与再制造提供了数据依据。
채용격광아호복합한기술한접 ZM5미합금，연구격광아호복합한여오겁아호한대미합금한봉성형성여역학성능적영향。성형성분석표명：재한접속도위5、15 mm／s 시，격광아호복합한능득도량호적한봉，차무기공결함；이오겁아호한불괄우고속한접，차기공결함명현。항랍강도분석표명：격광아호복합한봉평균항랍강도위246 MPa，굴복강도위94．53 MPa，단렬신장솔위2．48％，균대우오겁아호한，차2충한봉균정인성취성혼합단렬。경도측시분석표명：격광아호복합한봉구평균경도위63 HV0．05，열영향구경도치여모재구상당，약위55 HV0．05，균고우오겁아호한적경도。상술분석설명：격광적간예유리우제고미합금한봉성형성화역학성능，괄용우한접속도요구고、정황긴급시적한접，저위장비미합금령부건체적화결구손상적수복여재제조제공료수거의거。
Laser-arc hybrid welding technology is used on welding ZM5 magnesium alloy to study and compare the differences of appearance and mechanical property of laser-arc hybrid welding and TIG weld-ing.The result of forming property shows that laser-arc hybrid welding can always achieve better beads when welding speed is 5 or 15 mm/s,however,TIG welding can not.Moreover,beads of TIG welding exist gas cavities,while beads of laser-arc hybrid welding have nothing.Furthermore,tensile strength of laser-arc hybrid welding is 246 MPa,yield strength is 94.53 MPa,and extension percentage is 2.48%, these datum are better than TIG welding.Hardness test shows that the average hardness of laser-arc hy-brid welding reaches 63 HV0.05 ,which is superior to TIG welding.Besides,these are proved that laser intervention increases appearance and mechanical property;it is applicable for high speed and emergency welding.And it provides the data support for repairing and remanufacturing of the surface and architec-ture damage on magnesium alloy of armored equipment.