公开(公告)号：US5211909A

公开(公告)日：1993-05-18

申请号：US837917

申请日：1992-02-20

申请人： Atsuro Iseda ,  Yoshiatsu Sawaragi ,  Fujimitsu Masuyama ,  Tomomitsu Yokoyama

发明人： Atsuro Iseda ,  Yoshiatsu Sawaragi ,  Fujimitsu Masuyama ,  Tomomitsu Yokoyama

IPC分类号： C22C38/00 ,  C22C38/22 ,  C22C38/32 ,  C22C38/54

CPC分类号： C22C38/32 ,  C22C38/22

摘要： A low-alloy steel consists essentially, on a weight basis, of: C: 0.03-0.12%, Si: at most 0.7%, Mn: 0.1-1.5%, Ni: at most 0.8%, P: at most 0.03%, S: at most 0.015%, Cr: 1.5-3.5%, W: 1-3%, V: 0.1-0.35%, Nb: 0.01-0.1%, B: 0.0001-0.02%, N: less than 0.005%, Al: less than 0.005%, Ti: 0.001-0.1%, optionally one or more elements selected from the group consisting of: La, Ce, Y, Ca, Zr, and Ta: 0.01-0.2%, Mg: 0.0005-0.05%, and Mo: 0.01-0.4%, and a balance of Fe and incidental impurities, wherein the Ti and Ni contents satisfy the following inequality:0.080.gtoreq.Ti(%)-(48/14).times.N(%).gtoreq.0.003.The steel has improved creep strength at high temperatures and improved toughness. It can be substituted for expensive austenitic stainless steels or high-Cr ferritic steels.

公开(公告)号：US5069870A

公开(公告)日：1991-12-03

申请号：US489012

申请日：1990-03-06

申请人： Atsuro Iseda ,  Yoshiatsu Sawaragi

发明人： Atsuro Iseda ,  Yoshiatsu Sawaragi

IPC分类号： C22C38/00 ,  C22C38/20 ,  C22C38/22 ,  C22C38/48 ,  C22C38/54

CPC分类号： C22C38/20 ,  C22C38/22

摘要： A high-strength high-Cr steel with excellent high-temperature strength and toughness as well as improved resistance to oxidation and high-temperature corrosion is disclosed, which consists essentially of, in weight %:C : 0.04-0.2%, Si: not greater than 0.7%, Mn: 0.1-1.5%, Ni: not greater than 1%, Cr: 8-14%, Mo: 0.01-1.2%, W: 0.8-3.5%, V : 0.1-0.3%, Nb: 0.01-0.2%, Al: not greater than 0.05%, Cu: 0.4-3%, Mg: 0.0005-0.5%, N: 0.001-0.1%, B : 0-0.02%,at least one of La, Ce, Y, Ca, Ti, Zr, and Ta each in an amount of 0-0.2%, andFe and incidental impurities: balance.