光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2014年
5期
1168-1172
,共5页
气体熔池耦合活性T IG焊%电弧%Boltzmann作图法%氧%温度分布%电弧电压
氣體鎔池耦閤活性T IG銲%電弧%Boltzmann作圖法%氧%溫度分佈%電弧電壓
기체용지우합활성T IG한%전호%Boltzmann작도법%양%온도분포%전호전압
Gas pool coupled activating TIG%Boltzmann plot method%Oxygen%Temperature distributions%Arc%Arc voltage
气体熔池耦合活性T IG焊接方法是一种新型的活性焊接方法,该方法采用内外两层气体进行 T IG焊,内层惰性气体保护熔池金属和钨电极,外层气体引入活性元素O,使焊缝熔深增加,并通过调节内外喷嘴的相对位置,简单方便地调节外层活性气体与熔池表面的耦合度,实现对焊缝成形和焊缝性能的控制。外层气体的引入对焊接电弧有着重要的影响,因此针对气体熔池耦合活性 T IG电弧,采用Boltzmann作图法分析了外层气体为O2时不同耦合度下电弧等离子体的温度分布,在此基础上研究了电弧电压和电弧形貌的变化规律。结果表明,与普通T IG电弧对比,气体熔池耦合活性 T IG焊时,外层气体引入氧可使电弧略有收缩,电弧中心温度升高,同时电弧电压上升;与内外层气体都为A r的情况相比,外层采用O2对电弧的收缩作用更明显。当耦合度从0增加到2时,电弧中心温度和电弧电压都略有上升。在气体熔池耦合活性T IG焊中电弧收缩不明显,进行不锈钢焊接时熔深显著增加的主要机理不是电弧收缩。
氣體鎔池耦閤活性T IG銲接方法是一種新型的活性銲接方法,該方法採用內外兩層氣體進行 T IG銲,內層惰性氣體保護鎔池金屬和鎢電極,外層氣體引入活性元素O,使銲縫鎔深增加,併通過調節內外噴嘴的相對位置,簡單方便地調節外層活性氣體與鎔池錶麵的耦閤度,實現對銲縫成形和銲縫性能的控製。外層氣體的引入對銲接電弧有著重要的影響,因此針對氣體鎔池耦閤活性 T IG電弧,採用Boltzmann作圖法分析瞭外層氣體為O2時不同耦閤度下電弧等離子體的溫度分佈,在此基礎上研究瞭電弧電壓和電弧形貌的變化規律。結果錶明,與普通T IG電弧對比,氣體鎔池耦閤活性 T IG銲時,外層氣體引入氧可使電弧略有收縮,電弧中心溫度升高,同時電弧電壓上升;與內外層氣體都為A r的情況相比,外層採用O2對電弧的收縮作用更明顯。噹耦閤度從0增加到2時,電弧中心溫度和電弧電壓都略有上升。在氣體鎔池耦閤活性T IG銲中電弧收縮不明顯,進行不鏽鋼銲接時鎔深顯著增加的主要機理不是電弧收縮。
기체용지우합활성T IG한접방법시일충신형적활성한접방법,해방법채용내외량층기체진행 T IG한,내층타성기체보호용지금속화오전겁,외층기체인입활성원소O,사한봉용심증가,병통과조절내외분취적상대위치,간단방편지조절외층활성기체여용지표면적우합도,실현대한봉성형화한봉성능적공제。외층기체적인입대한접전호유착중요적영향,인차침대기체용지우합활성 T IG전호,채용Boltzmann작도법분석료외층기체위O2시불동우합도하전호등리자체적온도분포,재차기출상연구료전호전압화전호형모적변화규률。결과표명,여보통T IG전호대비,기체용지우합활성 T IG한시,외층기체인입양가사전호략유수축,전호중심온도승고,동시전호전압상승;여내외층기체도위A r적정황상비,외층채용O2대전호적수축작용경명현。당우합도종0증가도2시,전호중심온도화전호전압도략유상승。재기체용지우합활성T IG한중전호수축불명현,진행불수강한접시용심현저증가적주요궤리불시전호수축。
In the present paper ,Boltzmann plot method was applied to analyze the temperature distributions of the arc plasma when the gas pool coupled activating TIG welding was at different coupling degrees with the outer gas being O 2 .Based on this study of temperature distributions ,the changing regularities of arc voltage and arc appearance were studied .The result shows that compared with traditional TIG welding ,the introduction of O2 makes the welding arc constricted slightly ,the temperature of the arc center build up ,and the arc voltage increase .When argon being the inner gas ,oxygen serving as the outer gas instead of argon makes the arc constricted more obviously .When the coupling degree increases from 0 to 2 ,the temperature of the arc center and the arc voltage both increase slightly .In the gas pool coupled activating TIG welding the arc is constricted not obvi-ously ,and the reason why the weld penetration is improved dramatically in the welding of stainless steel is not arc constriction .