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High nitrogen stainless steel (HNS) which generally contains over 0.4wt% nitrogen is considered to be a high strength, high ductility and high toughness material. In order to study the nitrogen behavior in welding of high nitrogen steel, the steel 1Cr22Mn16N was welded by gas tungsten arc welding, and the influence of the shielding gas composition and heat input on the N-content and porosity of the...
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