公开(公告)号：US4957701A

公开(公告)日：1990-09-18

申请号：US232227

申请日：1988-08-15

申请人： Fujimitsu Masuyama ,  Takashi Daikoku ,  Hisao Haneda ,  Kunihiko Yoshikama ,  Hiroshi Teranishi ,  Atsuro Iseda

发明人： Fujimitsu Masuyama ,  Takashi Daikoku ,  Hisao Haneda ,  Kunihiko Yoshikama ,  Hiroshi Teranishi ,  Atsuro Iseda

IPC分类号： C22C38/22 ,  C22C38/24 ,  C22C38/26

CPC分类号： C22C38/26 ,  C22C38/22 ,  C22C38/24

摘要： A high-strength high-Cr ferritic, heat-resistant steel exhibiting improved high-temperature, long-term creep strength and a process for producing the same are disclosed. The steel consists essentially of, by weight %:______________________________________ C: not more than 0.2%, Si: not more than 1.0%, Mn: 0.1-1.5%, P: not more than 0.03%, S: not more than 0.03%, Ni: not more than 1.0%, Cr: 5.0-15%, Mo: 0.02-3.0%, W: not more than 4.0%, sol. Al: 0.05-0.04%, N: not more than 0.07%, ______________________________________ at least one of V: 0.01-0.4% and Nb: 0.01-0.3%, B: 0-0.02%,at least one of Ca, Ti, Zr, Y, La, and Ce: 0-0.2%, andthe balance Fe and incidental impurities,A.sub.cl point defined by Formula (1) below being 820 or higher. ##EQU1##

摘要翻译： 公开了一种表现出改善的高温，长期蠕变强度的高强度高Cr铁素体耐热钢及其制造方法。 该钢由重量％组成：由下式（1）定义的Acl点为850℃以上，由式（2）定义的Cr当量为17以下， CHEM>