公开(公告)号：EP0903412A2

公开(公告)日：1999-03-24

申请号：EP98307632.4

申请日：1998-09-21

申请人： NATIONAL RESEARCH INSTITUTE FOR METALS

发明人： Torizuka, Shino, National Res. Inst. for Metals ,  Tsuzaki, Kaneaki, National Res. Inst. for Metals ,  Nagai, Kotobu, National Res. Inst. for Metals ,  Umezawa, Osamu, National Res. Inst. for Metals

IPC分类号： C21D7/13 ,  C21D8/00

CPC分类号： C21D8/00 ,  C21D7/13 ,  C21D2211/005 ,  C21D2211/009

摘要： The invention provides an ultra-fine grain steel comprising fine ferrite grains as oriented at random and surrounded by large angle grain boundaries. The steel comprises fine ferrite grains having a mean grain size of not larger than 3.0 µm and surrounded by large angle grain boundaries having an misorientation not smaller than 15°.

摘要翻译： 本发明提供了一种超细晶粒钢，其包含随机取向且被大角度晶界包围的细小铁素体晶粒。 该钢包含平均粒径不大于3.0μm的微细铁素体晶粒，并且具有不大于15°的取向差的大角度晶界。