Tandem gas metal arc welding process, the torch and the welding equipment which for welding are used for this

摘要

The sealed gas for the preceding electrode which is supplied to the preceding electrode in the tandem gas metal arc welding process which uses with the preceding electrode and the rear line electrode, is three kind mixed gases of two kind mixed gases or the argon gas and carbon dioxide and the oxygen gas of the argon gas and carbon dioxide, after supplying to the rear line electrode, the sealed gas for the line electrode, the argon gas single unit, is three kind mixed gases of two kind mixed gases or the argon gas and carbon dioxide and the oxygen gas of two kind mixed gases, the argon gas and the oxygen gas of the argon gas and carbon dioxide,At the same time carbon dioxide density in the sealed gas for the rear line electrode, the tandem gas metal arc welding process which features that it makes lower than carbon dioxide density in the sealed gas for the preceding electrode is offered.