Dual phase steel sheet with good bake-hardening properties
    2.
    发明授权
    Dual phase steel sheet with good bake-hardening properties 有权
    双相钢板具有良好的烘烤硬化性能

    公开(公告)号:US09194015B2

    公开(公告)日:2015-11-24

    申请号:US12477299

    申请日:2009-06-03

    摘要: A dual phase steel sheet with good bake-hardening properties is provided. The steel sheet is characterized in containing (in terms of percent by mass) C: no less than 0.06% and less than 0.25%; Si+Al: 0.5 to 3%; Mn: 0.5 to 3%; P: no more than 0.15%; and S: no more than 0.02%; and also meeting the following condition (in terms of space factor) that retained austenite is at least 3%, bainite is at least 30%, and ferrite is no more than 50%, and further characterized in differing in stress larger than 50 MPa before and after application of 2% pre-strain and ensuing heat treatment for paint baking at 170° C. for 20 minutes. The steel sheet has well-balanced strength and workability, exhibits good bake-hardening properties at the time of paint baking, and offers good resistance to natural aging.

    摘要翻译: 提供了具有良好烘烤硬化性能的双相钢板。 钢板的特征在于含有(以质量%计)C:不小于0.06%且小于0.25%; Si + Al:0.5〜3% Mn:0.5〜3% P:不超过0.15%; S:不大于0.02%; 并且还满足以下条件(以空间因子计),残余奥氏体为3%以上,贝氏体为30%以上,铁素体为50%以下,其特征在于应力大于50MPa以下 并在施加2%预应变之后,并在170℃下进行油漆烘烤20分钟。 钢板具有平衡的强度和加工性,在烤漆时具有良好的烘烤硬化性能,并且具有良好的耐自然老化性。

    High-strength steel sheet having excellent workability and production process therefor
    4.
    发明授权
    High-strength steel sheet having excellent workability and production process therefor 有权
    具有优异的加工性的高强度钢板及其制造方法

    公开(公告)号:US07008488B2

    公开(公告)日:2006-03-07

    申请号:US10614821

    申请日:2003-07-09

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

    摘要: A high-strength steel sheet comprises carbon: 0.06 to 0.25 mass %, Si: 0.5 to 3.5 mass % and Mn: 0.7 to 4 mass %. Its mother structure is ferrite, its second phase structure comprises martensite and the residual austenite and the second phase structure measured by image analysis has an area fraction of 25% or less based on the total structure. The steel sheet satisfies the following requirements (1) to (3): (1) the volume fraction (Vtγhd R) of the residual austenite is 5% or more; (2) the ratio (SFγR/VtγR) of the area fraction (SFγR) of the residual austenite within ferrite to VtγR is 0.65 or more; and (3) the ratio [α2/(α1+γR)] of the space factor (α2) of martensite to the second phase structure (α1+γR) is 0.25 to 0.60. The steel sheet has excellent balance between strength and local elongation, and a low yield ratio.

    摘要翻译: 高强度钢板包含:0.06〜0.25质量%的碳,Si:0.5〜3.5质量%,Mn:0.7〜4质量%。 其母体结构是铁素体,其第二相结构包括马氏体,残余奥氏体和通过图像分析测量的第二相结构基于总结构具有25%或更小的面积分数。 钢板满足以下要求(1)〜(3):(1)残余奥氏体的体积分数(Vtgammahd R)为5%以上; (2)铁素体中的残余奥氏体的面积率(SFgamma R)与Vtgamma之间的比值(SFgamma R/ Vtgamma R) R S为0.65以上; 和(3)马氏体相对于第二相结构(α1+γ')的空间因子(α2)的比值[α2/(α1+γ' 为0.25〜0.60。 钢板在强度和局部伸长率之间具有优异的平衡,并且产率低。

    DUAL PHASE STEEL SHEET WITH GOOD BAKE-HARDENING PROPERTIES
    5.
    发明申请
    DUAL PHASE STEEL SHEET WITH GOOD BAKE-HARDENING PROPERTIES 审中-公开
    双相钢板具有良好的耐烧结性能

    公开(公告)号:US20090242085A1

    公开(公告)日:2009-10-01

    申请号:US12477299

    申请日:2009-06-03

    IPC分类号: C21D8/02 C22C38/00

    摘要: A dual phase steel sheet with good bake-hardening properties is provided. The steel sheet is characterized in containing (in terms of percent by mass) C: no less than 0.06% and less than 0.25%; Si+Al: 0.5 to 3%; Mn: 0.5 to 3%; P: no more than 0.15%; and S: no more than 0.02%; and also meeting the following condition (in terms of space factor) that retained austenite is at least 3%, bainite is at least 30%, and ferrite is no more than 50%, and further characterized in differing in stress larger than 50 MPa before and after application of 2% pre-strain and ensuing heat treatment for paint baking at 170° C. for 20 minutes. The steel sheet has well-balanced strength and workability, exhibits good bake-hardening properties at the time of paint baking, and offers good resistance to natural aging.

    摘要翻译: 提供了具有良好烘烤硬化性能的双相钢板。 钢板的特征在于含有(以质量%计)C:不小于0.06%且小于0.25%; Si + Al:0.5〜3% Mn:0.5〜3% P:不超过0.15%; S:不大于0.02%; 并且还满足以下条件(以空间因子计),残留奥氏体为3%以上,贝氏体为30%以上,铁素体为50%以下,其特征在于应力大于50MPa以下 并在施加2%预应变之后,并在170℃下进行油漆烘烤20分钟。 钢板具有平衡的强度和加工性,在烤漆时具有良好的烘烤硬化性能,并且具有良好的耐自然老化性。

    Zn-Al Alloy Having Excellent High-Speed Deformation Properties and Process For Producing the Same
    6.
    发明申请
    Zn-Al Alloy Having Excellent High-Speed Deformation Properties and Process For Producing the Same 审中-公开
    具有优异的高速变形性能的Zn-Al合金及其制造方法

    公开(公告)号:US20080196796A1

    公开(公告)日:2008-08-21

    申请号:US11916293

    申请日:2005-06-01

    IPC分类号: C22F1/053 C22C21/10 C22C18/04

    摘要: A Zn—Al alloy excellent in static deformability as well as dynamic deformability and applicable to large-sized structures, and a method for production thereof. The alloy contains 30-99% Zn, with the remainder being Al and inevitable impurities, and has a metallographic structure in which the α phase or α′ phase having an average grain size no larger than 5 μm contains the β phase finely dispersed therein, the Al inclusions have a maximum equivalent circle diameter no larger than 50 μm and are free of pores no smaller than 0.5 mm in terms of equivalent circle diameter, and the macrosegregation of Al is less than 3.0% and the microsegregation of Al is less than 2.0%. (% means mass %.)

    摘要翻译: 具有优异的静态变形性以及动态变形性且适用于大型结构的Zn-Al合金及其制造方法。 该合金含有30-99%的Zn,其余为Al和不可避免的杂质,并且具有金相组织,其中平均粒径不大于5μm的α相或α'相含有微细分散于其中的β相, Al夹杂物的最大当量圆直径不大于50μm,并且不具有等于当量圆直径不小于0.5mm的孔,并且Al的宏观偏析小于3.0%,并且Al的微观偏析小于2.0 %。 (%表示质量%)

    High strength and high toughness steel wires and method for making the
same
    7.
    发明授权
    High strength and high toughness steel wires and method for making the same 失效
    高强度高韧性钢丝及其制造方法

    公开(公告)号:US5873958A

    公开(公告)日:1999-02-23

    申请号:US921517

    申请日:1997-09-02

    摘要: A steel wire is composed mainly of fine pearlite and/or coarse pearlite, where the lamellar cementite in the pearlite is amorphous or amorphous-like. Alternatively, the wire may be composed mainly of bainite, where the cementite in the bainite is amorphous or amorphous-like. To manufacture the steel wire, a starting steel product is subjected repeatedly to patenting and cold drawing, and then subjected to final drawing at a true strain of 2.0 or above while cooling. The steel wire is higher in strength and toughness than wire whose lamellar cementite consists of nano crystals. The steel wire does not suffer any delamination when subjected to torsion.

    摘要翻译: 钢丝主要由细珠光体和/或粗珠光体组成,其中珠光体中的层状渗碳体是无定形的或无定形的。 或者,线可以主要由贝氏体组成,其中贝氏体中的渗碳体是无定形的或非晶态的。 为了制造钢丝,将起始钢产品反复进行专利和冷拉伸,然后在冷却时以2.0或更高的真实应变进行最终拉伸。 钢丝的强度和韧性高于层状渗碳体由纳米晶体组成的钢丝。 钢丝受扭时不会发生分层。

    HIGH-STRENGTH COLD ROLLED STEEL SHEET HAVING EXCELLENT FORMABILITY, AND PLATED STEEL SHEET
    8.
    发明申请
    HIGH-STRENGTH COLD ROLLED STEEL SHEET HAVING EXCELLENT FORMABILITY, AND PLATED STEEL SHEET 有权
    高强度冷轧钢板,具有优异的可铸性和镀层钢板

    公开(公告)号:US20100092332A1

    公开(公告)日:2010-04-15

    申请号:US12640229

    申请日:2009-12-17

    IPC分类号: C22C38/04 C22C38/12 C22C38/02

    CPC分类号: C22C38/02 C22C38/04 C22C38/12

    摘要: To provide a high-strength cold rolled steel sheet that has well-balanced tensile strength and elongation as well as well-balanced tensile strength and stretch-flangeability, and a plated steel sheet manufactured by plating the steel sheet.The high-strength cold rolled steel sheet contains: 0.10 to 0.28% of C, 1.0 to 2.0% of Si, 1.0 to 3.0% of Mn, and 0.03 to 0.10% of Nb in terms of % by mass, wherein the content of Al is controlled to 0.5 or less, the content of P is controlled to 0.15% or less, and the content of S is controlled to 0.02% or less, and wherein residual austenite accounts for 5 to 20%, bainitic ferrite accounts for 50% or more, and polygonal ferrite accounts for 30% or less (containing 0%), of the entire structure, and wherein a mean number of residual austenite blocks is 20 or more as determined when the random area (15 μm×15 μm) is observed by EBSP (electron back scatter diffraction pattern).

    摘要翻译: 提供具有良好的拉伸强度和伸长率以及平衡的拉伸强度和拉伸凸缘性的高强度冷轧钢板,以及通过电镀钢板而制成的镀覆钢板。 高强度冷轧钢板含有:以质量%计,C:0.10〜0.28%,Si:1.0〜2.0%,Mn:1.0〜3.0%,Nb:0.03〜0.10% 控制在0.5以下,P的含量控制在0.15%以下,S的含量控制在0.02%以下,残留奥氏体占5〜20%,贝氏体铁素体占50%, 更多的是多边形铁素体占整个结构的30%以下(含有0%),并且其中当观察到随机区域(15μm×15μm)时确定的残余奥氏体块的平均数为20以上 通过EBSP(电子背散射衍射图)。

    Zn-Al alloy excellent in elongation and method for producing the same
    9.
    发明申请
    Zn-Al alloy excellent in elongation and method for producing the same 审中-公开
    伸长率优良的Zn-Al系合金及其制造方法

    公开(公告)号:US20070107813A1

    公开(公告)日:2007-05-17

    申请号:US11581032

    申请日:2006-10-16

    IPC分类号: C22C18/04

    CPC分类号: C22C18/04 C22F1/165

    摘要: A Zn—Al alloy excellent in elongation, and a method for producing the same are provided. The Zn—Al alloy comprises Zn in a range of 68 to 88% by mass and the remainder including Al and unavoidable impurities, and has a structure with β phases finely dispersed in respective α phases or respective α′ phases, not more than 5 μm in average grain size, a macrosegregation value of Al in the structure being less than 3%, wherein lamellar structures at a central part of the structure is at not higher than 30% by volume, and a difference in average hardness between the central part and a surface layer zone of the structure is not more than 15%, so that the Zn—Al alloy is improved in respect of elongation and uniformity.

    摘要翻译: 提供伸长率优异的Zn-Al合金及其制造方法。 Zn-Al合金含有68〜88质量%的Zn,余量包括Al和不可避免的杂质,β相的结构在各自的α相或相应的α相中分散,不超过5μm 在平均晶粒尺寸中,结构中Al的宏观偏析值小于3%,其中在结构的中心部分的层状结构不高于30体积%,并且中心部分和 该结构的表层区域不超过15%,从而在伸长率和均匀性方面提高了Zn-Al合金。

    High-strength cold rolled steel sheet having excellent formability, and plated steel sheet
    10.
    发明申请
    High-strength cold rolled steel sheet having excellent formability, and plated steel sheet 审中-公开
    优异的成形性的高强度冷轧钢板,镀钢板

    公开(公告)号:US20050247378A1

    公开(公告)日:2005-11-10

    申请号:US11110716

    申请日:2005-04-21

    IPC分类号: C21D8/02 C22C38/12

    CPC分类号: C22C38/02 C22C38/04 C22C38/12

    摘要: To provide a high-strength cold rolled steel sheet that has well-balanced tensile strength and elongation as well as well-balanced tensile strength and stretch-flangeability, and a plated steel sheet manufactured by plating the steel sheet. The high-strength cold rolled steel sheet contains: 0.10 to 0.28% of C, 1.0 to 2.0% of Si, 1.0 to 3.0% of Mn, and 0.03 to 0.10% of Nb in terms of % by mass, wherein the content of Al is controlled to 0.5 or less, the content of P is controlled to 0.15% or less, and the content of S is controlled to 0.02% or less, and wherein residual austenite accounts for 5 to 20%, bainitic ferrite accounts for 50% or more, and polygonal ferrite accounts for 30% or less (containing 0%), of the entire structure, and wherein a mean number of residual austenite blocks is 20 or more as determined when the random area (15 μm×15 μμm) is observed by EBSP (electron back scatter diffraction pattern).

    摘要翻译: 提供具有良好的拉伸强度和伸长率以及平衡的拉伸强度和拉伸凸缘性的高强度冷轧钢板,以及通过电镀钢板而制成的镀覆钢板。 高强度冷轧钢板含有:以质量%计,C:0.10〜0.28%,Si:1.0〜2.0%,Mn:1.0〜3.0%,Nb:0.03〜0.10% 控制在0.5以下,P的含量控制在0.15%以下,S的含量控制在0.02%以下,残留奥氏体占5〜20%,贝氏体铁素体占50%, 更多的是多边形铁素体占整个结构的30%以下(含有0%),其中当通过EBSP观察到随机面积(15mumx15mumum)时,残留奥氏体块的平均数为20以上 (电子背散射衍射图)。