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LEAN DUPLEX STAINLESS STEEL LASER-WELDED MEMBER WITH GOOD PROPERTY OF LASER WELDED PART AND METHOD FOR PRODUCING LEAN DUPLEX STAINLESS STEEL LASER-WELD MEMBER
LEAN DUPLEX STAINLESS STEEL LASER-WELDED MEMBER WITH GOOD PROPERTY OF LASER WELDED PART AND METHOD FOR PRODUCING LEAN DUPLEX STAINLESS STEEL LASER-WELD MEMBER
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机译:具有激光焊接件良好性能的双相不锈钢薄激光焊接件及生产双相不锈钢激光焊接件的方法
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摘要
PROBLEM TO BE SOLVED: To provide a lean duplex stainless steel laser-weld member in which difference between: property of a weld metal part and of a heat-affected zone; and property of a base metal.SOLUTION: The lean duplex stainless steel laser-weld member with good property of a laser weld part is provided in which a weld metal part is formed by welding a lean duplex stainless steel material having a predetermined chemical composition and area ratio of an austenite phase of 40% to 70% by a laser weld without using a filler metal, and in which the weld metal part has the austenite phase deposited on a grain boundary of a ferrite phase and having an average of width of a cross section of 2.5 μm or more, and the weld member has a calculated value of a deposition initiation temperature of Cr nitride Nof 1250°C or less. N=800 N-3Cr+20Si+10 Ni-4Mn+1140... (1). In the formula (1), Nrepresents nitrogen concentration (mass%) in the weld metal part and each element symbol represents content (mass%) of such element in the steel material.SELECTED DRAWING: None
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