公开(公告)号：US07985306B2

公开(公告)日：2011-07-26

申请号：US12365335

申请日：2009-02-04

申请人： Jianqiang Chen ,  Thomas Michael Moors ,  Jon Conrad Schaeffer

发明人： Jianqiang Chen ,  Thomas Michael Moors ,  Jon Conrad Schaeffer

IPC分类号： C21D6/02 ,  C22C38/42 ,  C22C38/44

CPC分类号： C22C38/20 ,  C21D8/005 ,  C22C38/42

摘要： A precipitation-hardened stainless steel alloy comprises, by weight: about 14.0 to about 16.0 percent chromium; about 6.0 to about 7.0 percent nickel; about 1.25 to about 1.75 percent copper; about 0.5 to about 2.0 percent molybdenum; about 0.025 to about 0.05 percent carbon; niobium in an amount greater than about twenty times to about twenty-five times that of carbon; and the balance iron and incidental impurities. The alloy has an aged microstructure and an ultimate tensile strength of at least about 1100 MPa and a Charpy V-notch toughness of at least about 69 J. The aged microstructure includes martensite and not more than about 10% reverted austenite and is useful for making turbine airfoils.

摘要翻译： 沉淀硬化的不锈钢合金包含：重量：约14.0至约16.0％的铬; 约6.0至约7.0％的镍; 约1.25至约1.75％的铜; 约0.5至约2.0％的钼; 约0.025至约0.05％的碳; 铌的量大于碳的二十倍至二十五倍; 余铁和附带杂质。 该合金具有老化的微观结构和至少约1100MPa的极限拉伸强度和至少约69J的夏比V-缺口韧性。老化的微结构包括马氏体和不超过约10％的还原奥氏体，并且可用于制备 涡轮机翼型。