发明名称 |
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 |
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 |
申请公布号 |
JP2016191094(A) |
申请公布日期 |
2016.11.10 |
申请号 |
JP20150070312 |
申请日期 |
2015.03.30 |
申请人 |
NIPPON STEEL & SUMIKIN STAINLESS STEEL CORP |
发明人 |
OIKAWA YUSUKE;TSUGE SHINJI |
分类号 |
C22C38/00;C22C38/58 |
主分类号 |
C22C38/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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