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1. 发明授权

US09856548B2 Process for manufacturing steel sheet having very high strength, ductility and toughness characteristics, and sheet thus produced 有权
公开(公告)号：US09856548B2
公开(公告)日：2018-01-02
申请号：US12281839
申请日：2007-02-14
申请人： Sebastien Allain , Audrey Couturier , Thierry Iung , Christine Colin
发明人： Sebastien Allain , Audrey Couturier , Thierry Iung , Christine Colin
IPC分类号： C22C38/02 , C21D1/19 , C21D8/02 , C21D9/32 , C21D9/46 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/22 , C22C38/34 , C22C38/38
CPC分类号： C22C38/02 , C21D1/19 , C21D8/02 , C21D9/32 , C21D9/46 , C21D2211/002 , C21D2211/008 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/22 , C22C38/34 , C22C38/38
摘要： The invention relates to a hot-rolled steel sheet having a tensile strength of greater than 1200 MPa, an Re/Rm ratio of less than 0.75 and an elongation at break of greater than 10%, the composition of which contains, the contents being expressed by weight: 0.10%≦C≦0.25%; 1%≦Mn≦3%; Al≧0.015%; Si≦1.985%; Mo≦0.30%; Cr≦1.5%; S≦0.015%; P≦0.1%; Co≦1.5%; B≦0.005%; it being understood that 1%≦Si+Al≦2%; Cr+(3×Mo)≧0.3%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel consisting of at least 75% bainite, residual austenite in an amount equal to or greater than 5% and martensite in an amount equal to or greater than 2%.

2. 发明申请

US20090107588A1 PROCESS FOR MANUFACTURING STEEL SHEET HAVING VERY HIGH STRENGTH, DUCTILITY AND TOUGHNESS CHARACTERISTICS, AND SHEET THUS PRODUCED 有权
标题翻译：制造具有非常高的强度，坚固性和韧性特征的钢板的制造方法
公开(公告)号：US20090107588A1
公开(公告)日：2009-04-30
申请号：US12281839
申请日：2007-02-14
申请人： Sebastien Allain , Audrey Couturier , Thierry Iung , Christine Colin
发明人： Sebastien Allain , Audrey Couturier , Thierry Iung , Christine Colin
IPC分类号： C22C38/22 , C21D8/02
CPC分类号： C22C38/02 , C21D1/19 , C21D8/02 , C21D9/32 , C21D9/46 , C21D2211/002 , C21D2211/008 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/22 , C22C38/34 , C22C38/38
摘要： The invention relates to a hot-rolled steel sheet having a tensile strength of greater than 1200 MPa, an Re/Rm ratio of less than 0.75 and an elongation at break of greater than 10%, the composition of which contains, the contents being expressed by weight: 0.10%≦C≦0.25%; 1%≦Mn≦3%; Al≧0.015%; Si≦1.985%; Mo≦0.30%; Cr≦1.5%; S≦0.015%; P≦0.1%; Co≦1.5%; B≦0.005%; it being understood that 1%≦Si+Al≦2%; Cr+(3×Mo)≧0.3%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel consisting of at least 75% bainite, residual austenite in an amount equal to or greater than 5% and martensite in an amount equal to or greater than 2%.
摘要翻译：本发明涉及拉伸强度大于1200MPa，Re / Rm比小于0.75，断裂伸长率大于10％的热轧钢板，其组成包含表达的内容物：0.10％<= C <= 0.25％; 1％<= Mn <= 3％; Al> = 0.015％; Si <= 1.985％; Mo <= 0.30％; Cr <= 1.5％; S <= 0.015％; P <= 0.1％; Co <= 1.5％; B <= 0.005％; 应当理解，1％<= Si + Al <= 2％; Cr +（3xMo）> = 0.3％，由冶炼产生的铁和不可避免的杂质组成的组成的余量，由至少75％贝氏体组成的钢的组织，等于或大于5％的残余奥氏体和马氏体等于或大于2％的量。

3. 发明授权

US06328826B1 Method of fabricating “TRIP” steel in the form of thin strip, and thin strip obtained in this way 失效
标题翻译：以薄带形式制造“TRIP”钢的方法，以这种方式获得的薄带
公开(公告)号：US06328826B1
公开(公告)日：2001-12-11
申请号：US09621089
申请日：2000-07-21
申请人： Thierry Iung , Odile Faral , Michel Faral , Michel Babbit , Christophe Issartel
发明人： Thierry Iung , Odile Faral , Michel Faral , Michel Babbit , Christophe Issartel
IPC分类号： C21D800
CPC分类号： C21D8/0215 , C21D1/20 , C21D8/0226 , C21D2211/001 , C21D2211/002
摘要： The invention provides a method of fabricating “TRIP” steel in the form of thin strip, wherein: a strip from 1.5 to 10 mm thick, preferably from 1 to 5 mm thick, is cast directly from liquid steel having the composition (in weight percent) C % from 0.05 to 0.25, (Mn+Cu+Ni) % from 0.5 to 3, (Si+Al) % from 0.1 to 4, (P+Sn+As+Sb) % not greater than 0.1, (Ti+Nb+V+Zr+rare earths) % less than 0.3, Cr % less than 1, Mo % less than 1, V % less than 1, the remainder being iron and manufacturing impurities; said strip is hot rolled on-line in one or more passes at a temperature higher than the Ar3 temperature of said steel and with a reduction ratio from 25 to 70%; first forced cooling of said strip is carried out at a cooling rate from 5 to 100° C./s; the strip remains at temperatures from 550 to 400° C. for the time needed for bainitic transformation to occur therein with a residual austenite content greater than 5%, while preventing the formation of perlite, after which the transformation is interrupted by second forced cooling of said strip to a temperature below 400° C.; and said strip is coiled at a temperature below 350° C.
摘要翻译：本发明提供一种以薄带形式制造“TRIP”钢的方法，其中：从1.5至10mm厚，优选1至5mm厚的条直接从具有组成（以重量百分比计））C％为0.05〜0.25，（Mn + Cu + Ni）％为0.5〜3，（Si + Al）％为0.1〜4，（P + Sn + As + Sb）％为0.1以下，（Ti + Nb + V + Zr +稀土）％小于0.3，Cr％小于1，Mo％小于1，V％小于1，余量为铁和制造杂质;所述条在一起热轧在一起或更高的温度在高于所述钢的Ar 3温度的温度下进行，并且压缩比为25至70％;所述条的首先强制冷却以5至100℃/ s的冷却速率进行在550至400℃的温度下保持贝氏体转变所需的时间，残余奥氏体含量大于5％，同时防止珍珠岩的形成，之后转变为通过将所述条的第二次强制冷却至低于400℃的温度来破坏; 在350度以下的温度下盘卷

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