车身镀锌钢板激光焊接中锌蒸气排出行为的分析
The zinc-coated steel sheets are the indispensablebasic metal materials for car body.However.the zinc coatings with 10W boiling point andvapor expand effect which have anegative influence in weld pooI during laser lapwelding.are the roadblock hold backingthe application ofadvanced laser welding technologyespecially in automotive industry. In this paper based on admitting a prerequisite thatthe Zn needs time to complete phasechanges(solid-liquid-gaseous state)as welI as thetransfers of heat and mass，theexpelling behavior ofthe Zn and the criticaIlaserwelding conditions are analyzedqualitatively by observing the expelling statusofzinc vapor and correspondingmorphologies of weld seam.The experimental resultsindicate that,the all of Znexpelling phenomena belong to intermittent expellingmode and quasi.continuousexpelling mode.The available laser weldingconditions lcad to the laminar flow statedominanted in welding pool and the quasi.continuousexpelling mode.In this case.theMarangini effect has a critical function to transferthe Zn arrive the interface betweenmelt and atmosphere with a best velocity and shortesttrip then expel out from weldingpool before the Zn formed a breakage blast in weldingp001.The related experiments andanalyses are presented in this paper.
镀锌钢板 激光焊接 锌蒸气 汽车车身
丁健君 I．M．Richardson M．J.M．Hermans 潘宇 赵创新
上海交通大学材料科学与工程学院 代夫特技术大学材料科学与工程系 代夫特技术大学材料科学与工程系
国内会议
2007年中国国际工业博览会科技论坛暨上海市激光学会2007年学术年会
上海
中文
242-252
2007-11-01（万方平台首次上网日期，不代表论文的发表时间）