8008485_钱存_TIG-MAG复合焊接与MAG焊接成形对比_2017051213-钱存-tig-mag双电弧复合焊与单mag焊接成形对比.doc

摘要近些年来随着我国焊接技术发展迅速，对工业制造的要求也越来越高。因此有着高效率和高质量的TIG-MAG双电弧复合焊接工艺也被更多焊接工作者重视。本课题研究单MAG电弧焊与TIG-MAG双电弧焊的焊缝成形不同，通过单MAG焊、TIG-MAG焊、MAG-TIG焊三种焊接方式的成形样貌对比得出结论。试验结果表明：MAG-TIG双电弧复合焊焊接相比单MAG电弧焊焊接低合金高强钢Q345-B，焊缝余高从2.5mm增大到2.67mm，焊缝熔宽从4.33mm增宽到4.67mm；TIG-MAG双电弧复合焊相比单MAG电弧焊焊接低合金钢Q345-B，焊缝余高从2.5mm增大到2.83mm，焊缝熔宽从4.33mm增宽到6.17mm；TIG-MAG双电弧复合焊焊相比MAG-TIG双电弧复合焊焊接低合金高强钢Q345-B，焊缝余高从2.67mm增大到2.83mm，焊缝熔宽从4.67mm增宽到6.17mm。关键词：MAG-TIG复合焊单MAG焊焊接成形AbstractInrecentyears,withtherapiddevelopmentofweldingtechnologyinChina,therequirementsforindustrialmanufacturingarebecominghigherandhigher.Therefore,TIG-MAGhybridweldingtechnologywithhighefficiencyandhighqualityhasbeenpaidmoreattentionbyweldingworkers.Inthisstudy,theweldingseamformingofsingleMAGarcweldingisdifferentfromthatofTIG-MAGdoublearcwelding.Aconclusionisdrawnbycomparingtheformingappearanceofthreeweldingmethods:SingleMAGwelding,TIG-MAGweldingandMAG-TIGwelding.ThetestresultsshowthatcomparedwiththeSingleMAGarcweldingoflowalloyandhighstrengthsteelQ345B,theresidualweldheightincreasesfrom2.5mmto2.67mm,andtheweldweldwidthincreasesfrom4.33mmto4.67mm.ComparedwiththeSingle-MAGarcweldingoflow-alloyhigh-strengthsteelQ345B,TIG-MAGdual-arccompositeweldingincreasedtheresidualweldheightfrom2.5mmto2.83mmandtheweldweldwidthfrom4.33mmto6.17mm.ComparedwithMAG-TIGdual-arccompositeweldingforlow-alloyhigh-strengthsteelQ345B,theresidualweldheightincreasedfrom2.67mmto2.83mm,andtheweldweldwidthincreasedfrom4.67mmto6.17mm.Keywords:TIG-MAGhybridweldingSingleMAGweldingweldingformationPAGE\*MERGEFORMAT6PAGE\*MERGEFORMAT1第一章绪论1.1课题的背景及意义随着航天航空、交通运输、海军制造等工业的快速发展，其外形尺寸、重量结构、质量要求也不断提高，焊接工作量逐步上升，优质高效焊接技术已经成为焊接工作者的研究对象，经数据统计，我国焊接工作量已经处于世界强国水平[1]。为了提高焊接生产效率，有焊接方面的学者将双弧焊应用于中厚板的实际生产[2]。双电弧复合焊由两种焊接共同并列焊接