The MAG welding process with micro-jet cooling of the weld during the cooling stage was investigated.For micro-jet gases the mixtures of argon with carbon dioxide, oxygen, and nitrogen were tested.This paper presents a piece of information about a new proposal for gas mixtures during micro-jet cooling after welding.Presented is the main information about the influence of various micro-jet gas mixtures on the metallographic structure of the weld metal.The mechanical properties of the welds were presented in terms of various gas mixtures selection for micro-jet cooling.The influence of argon gas mixtures with oxygen and nitrogen for micro-jet cooling after welding are reported for the first time in the technical literature.
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Węgrzyn et al. (2016) studied this question.
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