公开(公告)号：US20060237102A1

公开(公告)日：2006-10-26

申请号：US11475117

申请日：2006-06-27

申请人： Manabu Oku ,  Yoshiaki Hori ,  Yoshimoto Fujimura ,  Takeshi Utsunomiya

发明人： Manabu Oku ,  Yoshiaki Hori ,  Yoshimoto Fujimura ,  Takeshi Utsunomiya

IPC分类号： C22C38/18

CPC分类号： C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

摘要： A low-cost ferritic steel sheet possessing not only formability enabling application to complexly configured automobile exhaust gas passage components but also high-temperature strength, high-temperature oxidation resistance and low-temperature toughness as good as or superior to existing ferritic steels, which ferritic steel sheet comprises, in mass percent, C: not more than 0.02%, Si: 0.7-1.1%, Mn: not more than 0.8%, Ni: not more than 0.5%, Cr: 8.0 to less than 11.0%, N: not more than 0.02%, Nb: 0.10-0.50%, Ti: 0.07-0.25%, Cu: 0.02-0.5%, B: 0.0005-0.02%, V: 0 (no addition)-0.20%, one or both of Ca and Mg: 0 (no addition)−0.01% in total, one or more elements among Y and rare earth elements: 0 (no addition)−0.20% in total, and the balance of Fe and unavoidable impurities, and satisfies 3 Cr+40 Si≧61, Cr+10 Si≦21, and 420 C−11.5 Si+7 Mn+23 Ni−11.5 Cr−12 Mo+9 Cu−49 Ti−25 (Nb+V)−52 A+470 N+189≦70.

摘要翻译： 一种低成本的铁素体钢板，不仅具有能够应用于配置复杂的汽车废气通道部件的成形性，而且具有与现有的铁素体钢一样好或优于现有的铁素体钢的高温强度，高温抗氧化性和低温韧性， 钢板以质量％计含有：不大于0.02％，Si：0.7-1.1％，Mn：不大于0.8％，Ni：不大于0.5％，Cr：8.0至小于11.0％，N： 不大于0.02％，Nb：0.10-0.50％，Ti：0.07-0.25％，Cu：0.02-0.5％，B：0.0005-0.02％，V：0（无添加）-0.20％ 和Mg：0（无添加）-0.01％，Y和稀土元素中的一种或多种元素：0（无添加）-0.20％，余量为Fe和不可避免的杂质，满足3 Cr + 40 Si> = 61，Cr + 10Si <= 21,420 C-11.5 Si + 7 Mn + 23 Ni-11.5 Cr-12 Mo + 9 Cu-49 Ti-25（Nb + V）-52 A + 470 N + 189 <= 70。