公开(公告)号：US5290370A

公开(公告)日：1994-03-01

申请号：US931066

申请日：1992-08-17

申请人： Susumu Okada ,  Susumu Masui ,  Susumu Satoh ,  Kei Sakata ,  Masahiko Morita ,  Toshiyuki Kato

发明人： Susumu Okada ,  Susumu Masui ,  Susumu Satoh ,  Kei Sakata ,  Masahiko Morita ,  Toshiyuki Kato

IPC分类号： C21D8/04 ,  C22C38/04 ,  C22C38/12

CPC分类号： C22C38/04 ,  C21D8/0426 ,  C22C38/12 ,  C21D8/0436 ,  C21D8/0473

摘要： A high-tension steel sheet suitable for deep drawing and having superior surface treatment characteristics is made of a steel consisting essentially of, by weight: 0.001 to 0.05% of C; not more than 1.0% of Si; not more than 2.5% of Mn; 0.05 to 1.0% of Mo; one or both of 0.001 to 0.2% of Nb and not more than 0.3% of Ti, wherein Ti*%+(48/93)Nb%.gtoreq.(48/12)C% in which Ti*%=Ti%-(48/32) S%-(48/14)N%, wherein, when Ti*%

摘要翻译： 适用于深拉伸且具有优异表面处理特性的高强度钢板由基本上由以重量计0.001％至0.05％C的钢制成; 不超过1.0％的Si; 不超过2.5％的Mn; 0.05〜1.0％的Mo; 其中Ti *％+（48/93）Nb％> =（48/12）C％中Ti = 0.001〜0.2％，Ti为0.3％以下，Ti *％= Ti％ 48/32）S％ - （48/14）N％，其中，当Ti *％<0时，Ti *％被认为是0; 0.0005〜0.01％B; 0.01〜0.10％的Al; 不超过0.15％的P; 不超过S的0.010％; 不大于0.006％的N; Si，Mn和P满足0.2 <（Si％+ 10P％）/ Mn％<3.3的条件; 余量基本上是Fe和杂质。 该钢板是通过以下工序制造的：将钢坯进行热轧，得到不低于Ar 3转变温度的最终热轧温度的热轧钢带; 在不含有Nb的情况下，在不低于300℃但不高于615℃的温度下卷取钢带，并且当含有Nb时不低于500℃，但不高于700℃; 对钢带进行冷轧，得到轧制压下率不低于65％的冷轧钢带; 在不低于再结晶温度但低于Ac3转变温度的温度下对冷轧带材进行再结晶退火。

公开(公告)号：US5356494A

公开(公告)日：1994-10-18

申请号：US874306

申请日：1992-04-24

申请人： Susumu Okada ,  Kei Sakata ,  Susumu Satoh ,  Masahiko Morita ,  Toshiyuki Kato

发明人： Susumu Okada ,  Kei Sakata ,  Susumu Satoh ,  Masahiko Morita ,  Toshiyuki Kato

IPC分类号： C21D1/18 ,  C21D8/04 ,  C22C38/12

CPC分类号： C22C38/12 ,  C21D8/0473 ,  C21D1/185 ,  C21D2211/00 ,  C21D2211/002 ,  C21D2211/005 ,  C21D8/0436

摘要： The invention relates to a high strength cold rolled steel sheet having excellent non-aging property at room temperature and excellent drawability, said steel sheet having a dual-phase structure composed of a high-temperature transformed ferrite phase and a low-temperature transformed ferrite phase having high dislocation density.The invention also relates a high strength cold rolled steel sheet having excellent non-aging property at room temperature and bake hardenability, as well as excellent drawability. This steel sheet is produced by preparing a hot-rolled steel sheet, cold rolling the hot-rolled steel sheet at a rolling reduction not smaller than 60%, annealing the cold rolled steel sheet at a temperature which is not lower than the .gamma. transformation start temperature but below the A.sub.c3 transformation temperature, and cooling the annealed steel sheet at a rate not smaller than 5.degree. C./sec but not greater than 100.degree. C./sec.

摘要翻译： 本发明涉及一种在室温下具有优异的非时效性和优异的拉伸性的高强度冷轧钢板，所述钢板具有由高温转化的铁素体相和低温转变的铁素体相组成的双相结构 具有高位错密度。 本发明还涉及在室温下具有优异的非时效性和烘烤淬透性以及优异的可拉伸性的高强度冷轧钢板。 该钢板通过制备热轧钢板，以不低于60％的压延率将热轧钢板进行冷轧，在不低于γ转变开始的温度下退火冷轧钢板 温度但低于Ac3转变温度，并且以不低于5℃/秒但不大于100℃/秒的速率冷却退火的钢板。

公开(公告)号：US5582658A

公开(公告)日：1996-12-10

申请号：US571683

申请日：1995-12-13

申请人： Susumu Masui ,  Kei Sakata ,  Fusao Togashi ,  Masahiko Morita ,  Toshiyuki Kato

发明人： Susumu Masui ,  Kei Sakata ,  Fusao Togashi ,  Masahiko Morita ,  Toshiyuki Kato

IPC分类号： C21D8/04 ,  C22C38/14 ,  C22C38/02

CPC分类号： C21D8/041 ,  C22C38/14 ,  C21D8/0426 ,  C21D8/0473

摘要： A high strength steel sheet adapted for press forming and method producing the same. The steel sheet containing by weight C: 0.01-0.1%, Si: 0.1-1.2%, Mn: not more than 3.0%, Ti:a value of (Ti%-1.5S%-3.43N%)/C% being 4-12, B: 0.0005-0.005%, Al: not more than 0.1%, P: not more than 0.1%, S: not more than 0.02%, N: not more than 0.05%. The method for producing the steel sheet wherein a steel slab containing the above mentioned component composition is heated and hot rolled in a temperature range of 1100-1280.degree. C. to provide a hot rolled sheet. The hot rolled sheet may be is subjected to cold rolling and annealing to provide a cold rolled sheet.

摘要翻译： 适用于压制成型的高强度钢板及其制造方法。 含有C：0.01-0.1％，Si：0.1-1.2％，Mn：不大于3.0％的Ti：a（Ti％-1.5S％-3.43N％）/ C％的值为4 -12，B：0.0005-0.005％，Al：不大于0.1％，P：不大于0.1％，S：不大于0.02％，N：不大于0.05％。 将含有上述组分组合物的钢板在1100-1280℃的温度范围内加热和热轧制成钢板的方法，以提供热轧板。 对热轧板进行冷轧和退火以提供冷轧板。

公开(公告)号：US5312493A

公开(公告)日：1994-05-17

申请号：US996130

申请日：1992-12-23

申请人： Susumu Masui ,  Masahiko Morita ,  Toshiyuki Kato

发明人： Susumu Masui ,  Masahiko Morita ,  Toshiyuki Kato

IPC分类号： C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/12 ,  C22C38/14 ,  C22C38/02 ,  C21D8/00

CPC分类号： C22C38/14 ,  C22C38/12

摘要： A low-yield-ratio high-strength hot-rolled steel sheet having the advantageous features of both conventional precipitation-strengthened steel and structure-strengthened steel and free from the drawbacks of these conventional steels, and a manufacturing method characterized in hot-rolling such a steel sheet. The steel sheet has an upper limit of C content of about 0.18 wt. %, and the lower C content limit approximately satisfies C.gtoreq.0.05+Ti/4+Nb/8 in relationship with the content of Ti and/or Nb. The steel sheet also contains about 0.5 to 2.5 wt. % Si and has a structure essentially formed of ferrite in which a carbide of Ti and/or Nb is precipitated, martensite and retained austenite.

摘要翻译： 具有常规沉淀强化钢和结构强化钢的有利特征的低屈服比高强度热轧钢板，并且不存在这些常规钢的缺点，并且制造方法的特征在于热轧 钢板。 钢板的C含量的上限为约0.18重量％。 ％，较低的C含量限度与Ti和/或Nb的含量大致相当于C> / = 0.05 + Ti / 4 + Nb / 8。 钢板也含有约0.5〜2.5wt。 ％Si，并且具有基本上由铁素体形成的结构，其中Ti和/或Nb的碳化物沉淀，马氏体和残余奥氏体。

公开(公告)号：US5460665A

公开(公告)日：1995-10-24

申请号：US321583

申请日：1994-10-11

申请人： Eiko Yasuhara ,  Kei Sakata ,  Susumu Satoh ,  Toshiyuki Kato

发明人： Eiko Yasuhara ,  Kei Sakata ,  Susumu Satoh ,  Toshiyuki Kato

IPC分类号： C21D8/04 ,  C21D8/00

CPC分类号： C21D8/0426 ,  C21D8/0473

摘要： A method of manufacturing a cold rolled steel sheet includes the steps of preparing, as a material, a steel whose composition consists of C: 0.004 wt % or less, Si: 0.10 wt % or less, Mn: 0.50 wt % or less, Ti: between 0.01 wt % and 0.10 wt %, Nb: between 0.003 wt % and 0.03 wt %, B: between 0.001 wt % and 0.004 wt %, Al: between 0.03 wt % and 0.10 wt %, P: 0.025 wt % or less, S: 0.01 wt % or less, N: 0.006 wt % or less; performing a hot rolling on the material steel under the conditions of a finishing temperature between 800.degree. C. and 900.degree. C.; coiling the material at a temperature lower than 650.degree. C.; performing a cold rolling; performing a continuous annealing at a temperature between 830.degree. C. and Ac.sub.3 transformation point; and performing a skin pass rolling.

摘要翻译： 制造冷轧钢板的方法包括以下步骤：制备组成为C：0.004重量％以下，Si：0.10重量％以下，Mn：0.50重量％以下的钢的材料，Ti ：0.01重量％〜0.10重量％，Nb：0.003重量％〜0.03重量％，B：0.001重量％〜0.004重量％，Al：0.03重量％〜0.10重量％，P：0.025重量％以下 ，S：0.01重量％以下，N：0.006重量％以下， 在800〜900℃的终轧温度的条件下对钢材进行热轧。 在低于650℃的温度下卷取材料; 进行冷轧; 在830℃和Ac3转化点之间进行连续退火; 并执行皮肤通过滚动。

公开(公告)号：US5053194A

公开(公告)日：1991-10-01

申请号：US449724

申请日：1989-12-12

申请人： Yoshio Yamazaki ,  Susumu Okada ,  Susumu Satoh ,  Toshiyuki Kato ,  Hideo Abe ,  Keiji Nishimura

发明人： Yoshio Yamazaki ,  Susumu Okada ,  Susumu Satoh ,  Toshiyuki Kato ,  Hideo Abe ,  Keiji Nishimura

IPC分类号： C21D8/04 ,  C22C38/00

CPC分类号： C22C38/00 ,  C21D8/04 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0473 ,  C21D8/0478

摘要： A formable thin steel sheet such as hot rolled sheet, cold rolled sheet or surface treated sheet comprises not more than 0.003 wt. % of C, not more than 1.0 wt % of Si, not more than 1.0 wt % of Mn, not more than 0.15 wt % of P, not more than 0.020 wt % of S, not more than 0.0045 wt % of O, not more than 0.0020 wt % of N, not more than 0.15 wt % of Al provided that a ratio of Al/N is not less than 30, and the balance being Fe and inevitable impurities, and has not only improved formability for press forming, deep drawing or the like but also improved fatigue resistance as a welded joint.

公开(公告)号：US5156694A

公开(公告)日：1992-10-20

申请号：US696683

申请日：1991-05-07

申请人： Yoshio Yamazaki ,  Susumu Okada ,  Susumu Satoh ,  Toshiyuki Kato ,  Hideo Abe ,  Keiji Nishimura

发明人： Yoshio Yamazaki ,  Susumu Okada ,  Susumu Satoh ,  Toshiyuki Kato ,  Hideo Abe ,  Keiji Nishimura

IPC分类号： C21D8/04 ,  C22C38/00

CPC分类号： C22C38/00 ,  C21D8/04 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0473 ,  C21D8/0478

摘要： A formable thin steel sheet such as hot rolled sheet, cold rolled sheet or surface treated sheet comprises not more than 0.003 wt % of C, not more than 1.0 wt % of Si, not more than 1.0 wt % of Mn, not more than 0.15 wt % of P, not more than 0.020 wt % of S, not more than 0.0045 wt % of O, not more than 0.0020 wt % of N, not more than 0.15 wt % of Al provided that a ratio of Al/N is not less than 30, and the balance being Fe and inevitable impurities, and has not only improved formability for press forming, deep drawing or the like but also improved fatigue resistance as a welded joint.

摘要翻译： 热轧板，冷轧板或表面处理片等成形薄钢板不超过0.003重量％的C，不大于1.0重量％的Si，不大于1.0重量％的Mn，不大于0.15 重量％的P，不大于0.020重量％的S，不大于0.0045重量％的O，不大于0.0020重量％的N，不大于Al的0.15重量％，只要Al / N的比率不是 小于30，余量为Fe和不可避免的杂质，不仅提高了冲压加工成形性，深冲压加工性，还提高了作为焊接接头的耐疲劳性。

公开(公告)号：US5542994A

公开(公告)日：1996-08-06

申请号：US363365

申请日：1994-12-23

申请人： Kazuhiro Seto ,  Kaneharu Okuda ,  Kei Sakata ,  Toshiyuki Kato ,  Takashi Ono

发明人： Kazuhiro Seto ,  Kaneharu Okuda ,  Kei Sakata ,  Toshiyuki Kato ,  Takashi Ono

IPC分类号： C21D1/18 ,  C21D1/26 ,  C21D8/04 ,  C21D9/46 ,  C21D9/48 ,  C22C38/00 ,  C22C38/16 ,  C21D8/02

CPC分类号： C21D9/48 ,  C21D8/0426 ,  C21D1/185 ,  C21D1/26 ,  C21D2211/00 ,  C21D2211/005 ,  C21D8/0473

摘要： A method of producing a high-formable, high-strength cold-rolled steel sheet from a steel slab comprising a steel with very low carbon content, one or both of Ti and Nb as a composition for forming a carbide or a nitride, and B in the range satisfying the following expression:0.001 A.ltoreq.B (wt %).ltoreq.0.003 Awherein A is a parameter determined approximately by the following expression with reference to the relation:A=P (wt %)+0.2 Mn (wt %)+0.8 Si (wt %)-0.2, subjecting the steel to a hot rolling so as to finish at a temperature between about Ar.sub.3 transformation temperature and about Ar.sub.3 transformation temperature +100 C.degree.. Thereafter, the steel is successively subjected to coiling, cold-rolling and, then, continuous annealing at temperatures between Ac.sub.1 transformation temperature +5 C.degree. and Ac.sub.1 transformation temperature +50 C.degree., and not lower than 860 C.degree.. Thus, a volume percentage of a low temperature transformation phase is controlled within the range of about 5 to about 50%, thereby obtaining a high strength cold-rolled steel sheet having a tensile strength of 38 kgf/mm.sup.2 or more, plus excellent formability and resistance to secondary working embrittlement.

摘要翻译： 作为用于形成碳化物或氮化物的组合物，由含有碳含量非常低的钢，Ti和Nb中的一种或两种的钢坯制造高成形性高强度冷轧钢板的方法，以及B 在满足以下表达式的范围内：0.001A

公开(公告)号：US5882803A

公开(公告)日：1999-03-16

申请号：US525686

申请日：1995-09-28

申请人： Kazuhiro Seto ,  Kei Sakata ,  Toshiyuki Kato ,  Shigeru Umino ,  Chiaki Kato

发明人： Kazuhiro Seto ,  Kei Sakata ,  Toshiyuki Kato ,  Shigeru Umino ,  Chiaki Kato

IPC分类号： B32B15/01 ,  C23C2/28 ,  B32B15/18 ,  C21D1/00 ,  C22C38/00

CPC分类号： B32B15/013 ,  C23C2/28 ,  Y10T428/12799 ,  Y10T428/12951

摘要： The invention is a high-strength hot dip galvannealed steel sheet having excellent press formability and plating properties by utilizing Si as a strengthening component, specifying an interrelation between Si and Mn and further specifying an alloying ratio of hot dip galvannealed layer, which comprises C: 0.0005-0.0050%, Si: 0.1-2.5%, Mn: 0.1-2.5%, Ti: 0.003-010%, Nb: 0.003-0.10%, B: 0.005-0.0080%, P: 0.040-0.18%, S: not more than 0.008%, Al: 0.005-0.10%, and N: not more than 0.0060 wt %, provided that Si and Mn satisfy the following equation, and the remainder being Fe and incidental impurities, and has a hot dip galvannealed layer formed on a surface of the steel sheet and having a Fe content of 9-12%, wherein said equation is:1.5 (% Mn)-2.ltoreq.(% Si).ltoreq.2(% Mn) (1).

摘要翻译： PCT No.PCT / JP95 / 00196 Sec。 371 1995年9月28日第 102（e）1995年9月28日PCT PCT 1995年2月13日提交PCT公布。 第WO95 / 21947号公报 日期：1995年8月17日本发明是通过利用Si作为强化成分，具有优异的压制成形性和电镀性的高强度热浸镀锌钢板，指定Si与Mn之间的相互关系，进一步确定热浸镀锌合金层的合金化比例 ，其包含C：0.0005-0.0050％，Si：0.1-2.5％，Mn：0.1-2.5％，Ti：0.003-0.10％，Nb：0.003-0.10％，B：0.005-0.0080％，P：0.040-0.18 ％，S：不大于0.008％，Al：0.005-0.10％，N：不大于0.0060重量％，条件是Si和Mn满足下列等式，其余为Fe和杂质，并且具有热 在钢板表面上形成的Fe含量为9〜12％的浸渍合金化热浸镀层，其中所述方程式为：1.5（％Mn）-2（％Si）≤2（％Mn） 1）。

公开(公告)号：US5846343A

公开(公告)日：1998-12-08

申请号：US616078

申请日：1996-03-14

申请人： Eiko Yasuhara ,  Kei Sakata ,  Toshiyuki Kato

发明人： Eiko Yasuhara ,  Kei Sakata ,  Toshiyuki Kato

IPC分类号： C21D8/04 ,  C21D9/48 ,  C22C38/00 ,  C22C38/12 ,  C22C38/14

CPC分类号： C22C38/14 ,  C21D8/041 ,  C22C38/12 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0473

摘要： A cold rolled steel sheet including about 0.001 weight percent or less of carbon (C), about 0.1 weight percent or less of silicon (Si), about 0.3 weight percent or less of manganese (Mn), about 0.05 weight percent or less of phosphorus (P), about 0.003 weight percent or less of sulfur (S), about 0.1 weight percent or less of aluminum (Al), about 0.002 weight percent or less of nitrogen (N), about 0.005 to 0.02 weight percent of titanium (Ti), about 0.001 to 0.01 weight percent of niobium (Nb), and the balance iron and incidental impurities. The total weight percent of carbon, sulfur, and nitrogen is about 0.004 weight percent or less. The content of titanium, carbon, sulfur and nitrogen satisfies the equation: about 4.times.(C wt %).ltoreq.(Ti wt %)-48/14(N wt %)-48/32(S wt %).ltoreq.about 12.times.(C wt %). The method of the invention includes uniformly heating a steel slab having a composition as described above at a temperature T(K) satisfying the following equation: T(K).times.(C wt %+S wt %).ltoreq.about 4.0, and within a temperature range from abut 900.degree. to 1,300.degree. C., hot rolling at a finishing temperature of higher than the A.sub.C3 transformation temperature, coiling at a temperature of about 650.degree. C. or less, cold rolling after pickling at a rolling reduction rate of about 65 to 90 percent, and recrystallization-annealing at a temperature ranging from about 700.degree. to 950.degree. C.

摘要翻译： 包含碳（C）的约0.001重量％以下，硅（Si）0.1重量％以下，锰（Mn）0.3重量％以下，磷的约0.05重量％以下的冷轧钢板 （P）约0.003重量％或更少的硫（S），约0.1重量％或更少的铝（Al），约0.002重量％或更少的氮（N），约0.005至0.02重量％的钛（Ti ），约0.001〜0.01重量％的铌（Nb），余量为铁和杂质。 碳，硫和氮的总重量百分比为0.004重量％以下。 钛，碳，硫和氮的含量满足以下等式：约4x（C wt％）（Ti wt％）-48/14（N wt％）-48/32（S wt％） 约12x（C wt％）。 本发明的方法包括在满足以下等式的温度T（K）下均匀加热具有上述组成的钢坯：T（K）x（C wt％+ S wt％）≤4.0，以及 在约900〜1300℃的温度范围内，在高于AC3相变温度的终轧温度下进行热轧，在约650℃以下的温度下卷取，以轧制压下率酸洗后的冷轧 约65〜90％，在约700〜950℃的温度下进行再结晶退火。