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1. 发明专利

JP2012012656A Cold rolled steel sheet and method for manufacturing the same 有权
标题翻译：冷轧钢板及其制造方法
公开(公告)号：JP2012012656A
公开(公告)日：2012-01-19
申请号：JP2010149700
申请日：2010-06-30
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： NISHIO TAKUYA , HAGA JUN , TANAKA YASUAKI , IMAI NORIO , TOMITA TOSHIRO
IPC分类号： C22C38/00 , B21B3/00 , C21D9/46 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a high tensile cold rolled steel sheet having superior ductility and stretch flange workability and a tensile strength of 590 MPa or more, and a method for manufacturing the same.SOLUTION: A cold rolled steel sheet characterized by having a chemical composition containing more than 0.020 mass% and less than 0.20 mass% of C, more than 0.10 mass% and not more than 2.0 mass% of Si, 1.50 to 3.50 mass% of Mn, not more than 0.10 mass% of P, not more than 0.010 mass% of S, not more than 0.10 mass% of sol. Al, and not more than 0.010 mass% of N, and Fe and impurities as the balance. A metallographic structure thereof includes a low-temperature transformation generated phase, which is the main phase, and a second phase containing ferrite and at the same time, contains iron carbide, in which the value of the ratio of Mn content (atom%) to Fe content (atom%) [Mn]/[Fe] is 0.04 or more, in an average number density of 3.0×10pieces/μmor more. The average crystal grain size of the ferrite is not more than 5.0 μm.
摘要翻译：解决的问题：提供具有优异的延展性和拉伸凸缘加工性以及拉伸强度为590MPa以上的高强度冷轧钢板及其制造方法。解决方案：一种冷轧钢板，其特征在于，其化学成分含有大于0.020质量％且小于0.20质量％的C，大于0.10质量％且不超过2.0质量％的Si，1.50〜3.50质量％ Mn的％以下，P的0.10质量％以下，S以上0.010质量％以下，溶胶的0.10质量％以下。 Al，不大于0.010质量％的N，Fe和杂质作为余量。其金相结构包括作为主相的低温相变生成相和含有铁素体的第二相，同时含有碳化铁，其中Mn含量（原子％）与 Fe含量（原子％）[Mn] / [Fe]为0.04以上，平均密度为3.0×10 /μm 2 或更多。铁素体的平均结晶粒径不大于5.0μm。版权所有（C）2012，JPO＆INPIT

2. 发明专利

JP2011140686A Method of producing cold-rolled steel sheet 有权
标题翻译：生产冷轧钢板的方法
公开(公告)号：JP2011140686A
公开(公告)日：2011-07-21
申请号：JP2010001385
申请日：2010-01-06
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： NISHIO TAKUYA , HAGA JUN , TANAKA YASUAKI , IMAI NORIO , TOMITA TOSHIRO
IPC分类号： C21D9/46 , B21B3/00 , C22C38/00 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a method of producing a cold-rolled high tension steel sheet having a tensile strength of ≥590 MPa and excellent ductility and stretch-flangeability.
SOLUTION: The method of producing the cold-rolled steel sheet having metal structure in which a main phase is a low-temperature transformation-generating phase and a secondary phase includes ferrite, is characterized by comprising the following processes (A)-(C): (A) a hot rolling process in which a slab having a chemical composition containing by mass% >0.020 to 0.10 to ≤2.0% Si, 1.50-3.50% Mn, ≤0.10% P, ≤0.010% S, ≤0.10% sol.Al and ≤0.010% N is subjected to hot rolling in which the rolling completes in the temperature range of Ar
3 point or higher, to obtain the hot-rolled steel plate, then the hot-rolled steel plate is cooled to the temperature range of ≤720°C within 0.4 sec after completion of the rolling, thereby average number density of iron carbide present on the grain boundary of the ferrite becomes ≥5.0×10
-2 pieces/μm
2 ; (B) a cold rolling process in which the hot-rolled steel plate is subjected to cold rolling to obtain a cold-rolled steel sheet; and (C) an annealing process in which the cold-rolled steel sheet is subjected to a soaking treatment in the temperature zone of (Ac
3 point -40°C) or higher.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：解决的问题：提供拉伸强度≥590MPa，延展性和拉伸凸缘性优异的冷轧高张力钢板的制造方法。解决方案：具有主相是低温相变产生相和次相的金属结构的冷轧钢板的制造方法包括铁素体，其特征在于包括以下工序（A）〜（C）：（A）一种热轧方法，其中化学组成包含质量％> 0.020至<0.20％C，> 0.10至≤2.0％Si，1.50-3.50％Mn，≤0.10％P， ≤0.010％S，≤0.10％sol.Al和≤0.010％N在Ar 3 或更高的温度范围内进行轧制完成的热轧，得到热轧钢板，然后在轧制完成后的0.4秒内将热轧钢板冷却至≤720℃的温度范围，使铁素体晶界存在的碳化铁的平均数密度为≥5.0×10 -2 个/μm 2 ; （B）冷轧钢板进行冷轧以获得冷轧钢板的冷轧方法; 和（C）冷轧钢板在（Ac 3 -40℃）以上的温度区进行均热处理的退火处理。版权所有（C）2011，JPO＆INPIT

3. 发明专利

JP2011246767A Bake-hardenable cold rolled steel sheet and method for producing the same 有权
标题翻译：耐磨可变冷轧钢板及其制造方法
公开(公告)号：JP2011246767A
公开(公告)日：2011-12-08
申请号：JP2010121435
申请日：2010-05-27
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： FURUHASHI SEIJI , NISHIO TAKUYA , MUTO AKIFUMI
IPC分类号： C22C38/00 , B21B3/00 , C21D9/46 , C22C38/06 , C22C38/60
摘要： PROBLEM TO BE SOLVED: To provide a cold rolled steel sheet which has a low yield stress before being press formed and has excellent press formability as a result and which has an increased yield stress by heat treatment after press formed and therefore exhibits satisfactory dent resistance, and to provide a method for producing the cold rolled steel sheet.SOLUTION: The cold rolled steel sheet has a chemical composition containing, by mass, 0.0005 to
摘要翻译：要解决的问题：提供一种在压制成型之前具有低屈服应力的冷轧钢板，并且由此具有优异的冲压成型性，并且通过加压成形后的热处理具有增加的屈服应力，因此显示出令人满意的耐凹陷性，并提供冷轧钢板的制造方法。＆lt;解决方案＆gt;冷轧钢板的化学组成为：以质量计含有C：0.0005〜0.030％的Si，0.01％的Mn，0.05〜2.0％的Mn，0.005〜0.06％的P，≤0.020％的S，0.0005〜 0.08％sol.Al和≤0.005％N，余量为Fe与杂质，冷轧钢板具有铁素体面积率≥90％，粒径≤0.20μm的MnS的钢结构数量≤10％，清洁度d≤0.05％，机械性能满足屈服比≤75％。版权所有（C）2012，JPO＆INPIT

4. 发明专利

JP2011140688A Method for producing cold-rolled steel sheet 有权
标题翻译：生产冷轧钢板的方法
公开(公告)号：JP2011140688A
公开(公告)日：2011-07-21
申请号：JP2010001387
申请日：2010-01-06
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： HAGA JUN , NISHIO TAKUYA , TANAKA YASUAKI , IMAI NORIO , TOMITA TOSHIRO
IPC分类号： C21D9/46 , C22C38/00 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a high-tensile strength cold-rolled steel sheet having excellent ductility and stretch flanging properties.
SOLUTION: The method for producing a cold-rolled steel sheet having a metallic structure comprising ferrite as the main phase and a low-temperature transformation-forming phase in the second phase includes the following steps (A) to (C): (A) a hot rolling step of subjecting a slab having a chemical composition comprising, by mass, >0.010 to 0.10 to 2.0% Si, 1.50 to 3.50% Mn, ≤0.10% P, ≤0.010% S, ≤0.10% sol.Al and ≤0.010% N to hot rolling of completing the rolling in the temperature range of an Ar
3 point or above into a hot rolled steel sheet, cooling the hot rolled steel sheet to the temperature range of ≤720°C within 0.4 s after the completion of the rolling, and coiling the same in the temperature range of ≥400°C; (B) a cold rolling step of subjecting the hot rolled steel sheet to cold rolling into a cold rolled steel sheet; and (C) an annealing step of subjecting the cold rolled steel sheet to soaking treatment in the temperature range of (an Ac
3 point-40°C) or above.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有优异的延展性和拉伸凸缘性的高强度冷轧钢板的制造方法。解决方案：具有包含铁素体作为主相的金属结构的冷轧钢板的制造方法和第二阶段的低温变形形成相包括以下步骤（A）至（C）：（A）热轧工序，对具有化学组成的板坯进行质量分数为：> 0.010〜0.10％的C，0.10〜2.0％的Si，1.50〜3.50％的Mn，≤0.10％的P，≤0.010％的S ，在Ar 3 点以上的温度范围内进行轧制的热轧，≤0.10％sol.Al且≤0.010％N，进行热轧钢板的冷却在轧制完成后的0.4s内到≤720℃的温度范围，并在≥400℃的温度范围内卷取; （B）将热轧钢板冷轧成冷轧钢板的冷轧工序; 和（C）在（Ac 3 40℃）以上的温度范围内对冷轧钢板进行浸渍处理的退火工序。版权所有（C）2011，JPO＆INPIT

5. 发明专利

JP2012012629A Cold rolled steel sheet and method for producing the same 有权
标题翻译：冷轧钢板及其制造方法
公开(公告)号：JP2012012629A
公开(公告)日：2012-01-19
申请号：JP2010147597
申请日：2010-06-29
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： FURUHASHI SEIJI , NISHIO TAKUYA
IPC分类号： C22C38/00 , B21B3/00 , C21D9/46 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To provide a cold rolled steel sheet having low yield stress, excellent deep drawability, and good fabrication brittleness resistance, and to provide a method for producing the same.SOLUTION: The cold rolled steel sheet has a chemical composition which contains a predetermined concentration of C, Si, Mn, P, S, sol. Al, N, Ti, and Nb, with the balance being Fe and impurities, and satisfies the following formulas (1) and (2); has a steel structure having a ferritic grain size number of 9.0 or less; and has mechanical properties in which the amount of hardening by coating and baking is 10 to 35 MPa, wherein formula (1) is -0.0025≤C-(12/93)×Nb-(12/48)×Ti
摘要翻译：要解决的问题：提供一种低屈服应力，优异的深冲性和良好的制造脆性的冷轧钢板，并提供其制造方法。解决方案：冷轧钢板具有含有预定浓度的C，Si，Mn，P，S，溶胶的化学组成。 Al，N，Ti和Nb，余量为Fe和杂质，满足下式（1）和（2）; 具有铁素体粒径为9.0以下的钢结构体; 具有机械特性，其中通过涂布和烘烤的硬化量为10〜35MPa，式（1）为-0.0025≤C-（12/93）×Nb-（12/48）×Ti * <0，并且公式（2）为Ti <（SPD）= max [Ti-（48/14）×N-（48/32） ×S，0]。这里，式（1）和（2）中的元素的每个符号表示每个元素的内容（单位：质量％），并且式（2）中的max []是返回参数中最大值的函数， ]。版权所有（C）2012，JPO＆INPIT

6. 发明专利

JP2011140687A Method for producing cold-rolled steel sheet 有权
标题翻译：生产冷轧钢板的方法
公开(公告)号：JP2011140687A
公开(公告)日：2011-07-21
申请号：JP2010001386
申请日：2010-01-06
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： HAGA JUN , NISHIO TAKUYA , TANAKA YASUAKI , IMAI NORIO , TOMITA TOSHIRO
IPC分类号： C21D9/46 , B21B3/00 , C22C38/00 , C22C38/06 , C22C38/38
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a high-tensile strength cold-rolled steel sheet having a tensile strength of ≥590 MPa and having excellent ductility and stretch flanging properties.
SOLUTION: The method for producing a cold-rolled steel sheet having a metallic structure comprising a low-temperature transformation-forming phase as the main phase and comprising ferrite in the second phase includes the following steps (A) to (C): (A) a hot rolling step of subjecting a slab having a chemical composition comprising, by mass, >0.020 to 0.10 to 2.0% Si, 1.50 to 3.50% Mn, ≤0.10% P, ≤0.010 S, ≤0.10% sol.Al and ≤0.010% N to hot rolling of completing the rolling in the temperature range of an Ar
3 point or above to obtain a hot rolled steel sheet, cooling the hot rolled steel sheet to the temperature range of ≤720°C within 0.4 s after the completion of the rolling, and coiling the same in the temperature range of ≥400°C; (B) a cold rolling step of subjecting the hot rolled steel sheet to cold rolling to obtain a cold rolled steel sheet; and (C) an annealing step of subjecting the cold rolled steel sheet to soaking treatment in the temperature range of (an Ac
3 point-40°C) or above.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：待解决的问题：提供一种拉伸强度≥590MPa并且具有优异的延展性和拉伸凸缘性的高强度冷轧钢板的制造方法。解决方案：具有包含低温相变形成相作为主相并在第二相中包含铁素体的金属结构的冷轧钢板的制造方法包括以下步骤（A）至（C）（A）热轧工序，对具有化学组成的板坯进行质量分数为：> 0.020〜0.20％，C：0.10〜2.0％的Si，1.50〜3.50％的Mn，≤0.10％的P，≤0.010S ，在Ar 3 以上的温度范围内完成轧制的热轧，≤0.10％sol.Al，≤0.010％N，得到热轧钢板，冷却热轧钢板在轧制完成后的0.4s内，在≤720℃的温度范围内，在≥400℃的温度范围内卷取; （B）冷轧工序，对所述热轧钢板进行冷轧，得到冷轧钢板; 和（C）在（Ac 3 40℃）以上的温度范围内对冷轧钢板进行浸渍处理的退火工序。版权所有（C）2011，JPO＆INPIT

7. 发明专利

JP2008196021A High tensile strength steel sheet and high tensile strength hot dip galvannealed steel sheet 有权
标题翻译：高强度钢板和高强度热镀锌钢板
公开(公告)号：JP2008196021A
公开(公告)日：2008-08-28
申请号：JP2007033771
申请日：2007-02-14
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： NISHIO TAKUYA , NAKAMURA TOYOMITSU
IPC分类号： C22C38/00 , C22C38/14 , C23C2/06
摘要： PROBLEM TO BE SOLVED: To solve the following problems: materialization of high deep drawability requires the preparation of IF steel by incorporation of Ti and/or Nb, whereas the incorporation of P is effective for increasing the tensile strength of the steel while maintaining its high deep drawability, in this case however, its secondary working embrittlement remarkably deteriorates. SOLUTION: The high tensile strength steel sheet comprises, by mass, ≤0.0050% C, ≤0.1% Si, ≤3.0% Mn, ≤0.15% P, ≤0.015% S, 0.005 to 0.10% sol.Al, ≤0.005% N and 0.020 to 0.33% Nd, and further containing ≤0.10% Ti and/or ≤0.050% Nb so as to satisfy the following inequality (1), and the balance Fe with impurities: Ti*/48+Nb/93>C/12 (1); wherein the atomic symbols in the inequality denote the contents (unit: mass%) of the respective elements, Ti*=Ti-48(N/14+S/32), and, in the case Ti* COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了解决以下问题：高深冲性的物化需要通过掺入Ti和/或Nb来制备IF钢，而掺入P对于提高钢的拉伸强度是有效的，而保持其高的可拉伸性，但在这种情况下，其二次加工脆性显着降低。解决方案：高强度钢板以质量计≤0.0050％C，≤0.1％Si，≤3.0％Mn，≤0.15％P，≤0.015％S，0.005〜0.10％sol.Al，≤ 0.005％N和0.020-0.33％Nd，并且进一步含有≤0.10％Ti和/或≤0.050％Nb以满足以下不等式（1），余量为Fe：杂质：Ti * / 48 + Nb / 93 > C / 12（1）; 其中不等式中的原子符号表示各元素的含量（单位：质量％）Ti * = Ti-48（N / 14 + S / 32），并且在Ti * <0的情况下，Ti * = 0。版权所有（C）2008，JPO＆INPIT

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