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1、?IFWT 2006 CO2? ? ?114003? ?CO2?CO2? ? ? ?CO2? Abstract?Carbon-dioxide arc welding have been widely used in China recently .The characteristics of the Carbon-dioxide arc welding and their technique measure are introduced according to the applications of this welding method in project ? setting up ga
2、s holder .The purpose that controlling welding deformation effectively is achieved ? and make the welding quality and the production efficiency are improved greatly . Key words?Carbon-dioxide arcwelding?Gas holder?Welding technique 0? ? ? ? ? ? ?CO2? 1 CO2? ? ? ? ?CO2? ? ? 0.5?1.2mm? 1.6mm?CO2? 1.1C
3、O2? ?1?CO2? 2006 ?318 IFWT 2006? ? ? ?2? CO2?CO2? ?CO2? 37%?42%? ?3? ? ?4? ? ?5? ? 1.2CO2? 1?CO2? 2?CO2?CO2? ? 3? 2?CO2? 1?CO2? ?CO2?CO2? ? 6MPa?CO2? ? ? 1.0m/s? 2?CO2? ?CO2?CO2? ? 3? ? 3 ?m3? ? ? ?T? ? 835939kg? 3.1? ? ? 25mm? 1 ? ? 319 2006 ? ?IFWT 2006 ? 1 ? 4.5mm? ? 3.2? ?1? ? ? ?2? ? ? ?3? ? ?
4、2? 3 ? ? 2 2006 ?320 IFWT 2006? ? 3 3.3CO2? 1?CO2?NBC?300 ? ? 2?1?2s? ?2?3s? ? 3?CO2? 99.5%? 0.1%? 1 ?CO2? ? 1?2h? 2? 3 ? 30min? 2?3min? ?CO2? 4? 20mm ? ? 5? 150mm? 6? 12?14mm? 7?1.0m/s? 8? ? ? ? /mm ? /A ? /V ? /cm?min?1 ? /L?min?1 H08Mn2SiA?1.2 140?180 210?260 20?23 25?29 20?2515?20 4? ? ? 5? ? ? 26.664kPa ? 321 2006 ? ?IFWT 2006 ? 3 ? ?CO2? ? ? ? 20 ? 10 ?CO2? ? ? ? ? ? ?1? ?. ?M?. ?1991. ?2? ?1973. ?1971 ?1993 ? 2006 ?322