公开(公告)号：US20150078954A1

公开(公告)日：2015-03-19

申请号：US14552985

申请日：2014-11-25

Applicant: ARCELORMITTAL FRANCE

Inventor： Mohamed BOUZEKRI ,  Michel FARAL ,  Colin SCOTT

IPC: C22C38/58 ,  C22C38/42 ,  C22C38/38 ,  C22C38/00 ,  C22C38/22 ,  C22C38/20 ,  C22C38/06 ,  C22C38/02 ,  C22C38/44 ,  C22C38/34

CPC classification number: C22C38/58 ,  B21B3/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0273 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  H01M4/8605 ,  H01M4/8807 ,  H01M4/8817 ,  H01M4/8853 ,  H01M4/8892 ,  H01M4/9075 ,  H01M4/925 ,  H01M8/0232 ,  H01M8/1004 ,  Y02E60/50 ,  Y02P70/56

Abstract: A cold-rolled austenitic iron/carbon/manganese steel sheet is provided. The strength of which is greater than 950 MPa, the product (strength (in MPa)×elongation at fracture (in %)) of which is greater than 45000 and the chemical composition of which includes, the contents being expressed by weight 0.5%≦C≦0.7%, 17%≦Mn≦24%, Si≦3%, Al≦0.050%, S≦0.030%, P≦0.080% and N≦0.1%. A remainder of the composition includes iron and inevitable impurities resulting from the smelting. A recrystallized fraction of the structure of the steel is greater than 75%, a surface fraction of precipitated carbides of the steel is less than 1.5% and a mean grain size of the steel is less than 6 microns. A reinforcing element is also provided.

Abstract translation: 提供冷轧奥氏体铁/碳/锰钢板。 其强度大于950MPa，产品（强度（MPa）×断裂伸长率（％））大于45000，其化学组成包括含量以重量计0.5％＆nlE ; Cn1; 0.7％，17％和nlE; Mn和nlE; 24％，Si＆NlE; 3％，Al＆amp; NlE; 0.050％，S＆amp; N; 0.030％，P＆NlE; 0.080％和N＆lt; 组合物的其余部分包括由冶炼产生的铁和不可避免的杂质。 钢结构的再结晶部分大于75％，钢的沉淀碳化物的表面分数小于1.5％，钢的平均晶粒尺寸小于6微米。 还提供了增强元件。

公开(公告)号：US20150078955A1

公开(公告)日：2015-03-19

申请号：US14553033

申请日：2014-11-25

Applicant: ARCELORMITTAL FRANCE

Inventor： Mohamed BOUZEKRI ,  Michel FARAL ,  Colin SCOTT

IPC: C22C38/58 ,  C22C38/42 ,  C22C38/38 ,  C22C38/34 ,  B21B3/02 ,  C22C38/20 ,  C22C38/06 ,  C22C38/02 ,  C22C38/00 ,  C22C38/44 ,  C22C38/22

CPC classification number: C22C38/58 ,  B21B3/02 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0273 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  H01M4/8605 ,  H01M4/8807 ,  H01M4/8817 ,  H01M4/8853 ,  H01M4/8892 ,  H01M4/9075 ,  H01M4/925 ,  H01M8/0232 ,  H01M8/1004 ,  Y02E60/50 ,  Y02P70/56

Abstract: A hot-rolled austenitic iron/carbon/manganese steel sheet is provided. The strength of which is greater than 900 MPa, the product (strength (in MPa)×elongation at fracture (in %)) of which is greater than 45000 and the chemical composition of which includes, the contents being expressed by weight 0.5%≦C≦0.7%, 17%≦Mn≦24%, Si≦3%, Al≦0.050%, S≦0.030%, P≦0.080% and N≦0.1%. A remainder of the composition includes iron and inevitable impurities resulting from the smelting. A recrystallized fraction of the structure of the steel is greater than 75%, a surface fraction of precipitated carbides of the steel is less than 1.5% and a mean grain size of the steel is less than 18 microns. A reinforcing element is also provided.

Abstract translation: 提供热轧奥氏体铁/碳/锰钢板。 其强度大于900MPa，产品（强度（MPa）×断裂伸长率（％））大于45000，其化学组成包括内容物重量为0.5％＆nlE ; Cn1; 0.7％，17％和nlE; Mn和nlE; 24％，Si＆NlE; 3％，Al＆amp; NlE; 0.050％，S＆amp; N; 0.030％，P＆NlE; 0.080％和N＆lt; 组合物的其余部分包括由冶炼产生的铁和不可避免的杂质。 钢的结构的再结晶分数大于75％，钢的沉淀碳化物的表面分数小于1.5％，钢的平均晶粒尺寸小于18微米。 还提供了增强元件。