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61. 发明申请

US20100273024A1 DUAL-PHASE STEEL, FLAT PRODUCT MADE OF A DUAL-PHASE STEEL OF THIS TYPE AND PROCESSES FOR THE PRODUCTION OF A FLAT PRODUCT 审中-公开
标题翻译：这种类型的双相钢的双相钢，平板产品和生产平板产品的方法
公开(公告)号：US20100273024A1
公开(公告)日：2010-10-28
申请号：US12673388
申请日：2008-08-07
申请人： Ekaterina Bocharova , Thomas Heller , Dorothea Mattissen , Gunter Stich , Silke Strauss , Thomas Nickels
发明人： Ekaterina Bocharova , Thomas Heller , Dorothea Mattissen , Gunter Stich , Silke Strauss , Thomas Nickels
IPC分类号： B32B15/01 , C21D8/02 , C22C38/32 , C22C38/00 , C22C38/22 , B32B15/00 , B32B15/18
CPC分类号： C21D8/02 , C22C38/02 , C22C38/28 , C22C38/38 , Y10T428/12799 , Y10T428/12972
摘要： A dual-phase steel, a flat product produced therefrom and a process for the production thereof. The dual-phase steel has, in addition to a strength of at least 950 MPa and good deformability, a surface finish which, when a simple production process is used, makes it possible for the flat product produced from this steel to be formed into a complexly formed component, such as a part of a car bodywork, in an uncoated state or in a state provided with an anti-corrosion coating. The steel according to the invention comprises 20-70% martensite, up to 8% retained austenite and the remainder ferrite and/or bainite and comprises (in % by weight): C: 0.10-0.20%, Si: 0.10-0.60%, Mn: 1.50-2.50%, Cr: 0.20-0.80%, Ti: 0.02-0.08%, B:
摘要翻译：双相钢，由其制成的扁平制品及其制造方法。双相钢除了具有至少950MPa的强度和良好的变形性之外，还具有表面光洁度，当使用简单的制造工艺时，可以将由该钢制成的扁平产品形成为复杂形成的部件，例如汽车车身的一部分，处于未涂覆状态或设置有防腐蚀涂层的状态。根据本发明的钢包括20-70％的马氏体，高达8％的残余奥氏体，其余的是铁素体和/或贝氏体，并包含（重量％）：C：0.10-0.20％，Si：0.10-0.60％ Mn：1.50-2.50％，Cr：0.20-0.80％，Ti：0.02-0.08％，B：<0.0020％，Mo：<0.25％，Al：<0.10％，P：NlE; 0.2％，S： 0.01％，N：＆NlE; 0.012％，其余为铁和不可避免的杂质。

62. 发明授权

US07799148B2 Method for producing austenitic iron-carbon-manganese metal sheets, and sheets produced thereby 有权
标题翻译：制造奥氏体铁碳 - 锰 - 锰金属片的方法和由此制造的片材
公开(公告)号：US07799148B2
公开(公告)日：2010-09-21
申请号：US11814329
申请日：2006-01-10
申请人： Colin Scott , Philippe Cugy , Maurita Roscini , Anne Dez , Dominique Cornette
发明人： Colin Scott , Philippe Cugy , Maurita Roscini , Anne Dez , Dominique Cornette
IPC分类号： C23C8/22 , C22C38/04 , C21D8/02
CPC分类号： C21D6/00 , C21D8/02 , C21D8/04 , C21D9/46 , C22C38/04
摘要： Iron-carbon-manganese austenitic steel sheet, the chemical composition of which comprises, the contents being expressed by weight: 0.45%≦C≦0.75%; 15%≦Mn≦26%; Si≦3%; Al≦0.050%; S≦0.030%; P≦0.080%; N≦0.1%; at least one metal element chosen from vanadium, titanium, niobium, chromium and molybdenum, where 0.050%≦V≦0.50%; 0.040%≦Ti≦0.50; 0.070%≦Nb≦0.50%; 0.070%≦Cr≦2%; 0.14%≦Mo≦2%; and, optionally, one or more elements chosen from 0.0005%≦B≦0.003%; Ni≦1%; Cu≦5%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the amounts of said at least one metal element in the form of precipitated carbides, nitrides or carbonitrides being: 0.030%≦Vp≦0.150%; 0.030%≦Tip≦0.130%; 0.040%≦Nbp≦0.220%; 0.070%≦Crp≦0.6%; 0.14%≦Mop≦0.44%.
摘要翻译：铁 - 碳 - 锰奥氏体钢板，其化学组成包含，其含量以重量计：0.45％＆nlE; C＆lt; lE; 0.75％; 15％＆nlE; Mn＆nlE; 26％; Si＆nlE; 3％; Al＆nlE; 0.050％; S＆nlE; 0.030％; P＆nlE; 0.080％; N＆nlE; 0.1％; 选自钒，钛，铌，铬和钼中的至少一种金属元素，其中0.050％＆NlE; V＆lt; In; 0.50％; 0.040％＆nlE; Ti＆nlE; 0.50; 0.070％＆nlE; Nb＆nlE; 0.50％; 0.070％＆nlE; Cr＆nlE; 2％; 0.14％＆nlE; Mo＆nlE; 2％; 和任选的一种或多种选自0.0005％和百万分之一的元素; B＆amp; E; 0.003％; Ni＆nlE; 1％; Cu + nIE; 5％，由冶炼产生的铁和不可避免的杂质组成的组成的余量，沉淀的碳化物，氮化物或碳氮化物形式的所述至少一种金属元素的量为：0.030％＆amp; NlE; Vp＆NlE; 0.150％ ; 0.030％＆nlE; Tip＆nlE; 0.130％; 0.040％＆nlE; Nbp＆nlE; 0.220％; 0.070％＆nlE; Crp＆nlE; 0.6％; 0.14％＆nlE; Mop＆nlE; 0.44％。

63. 发明申请

US20100132855A1 FIRE-RESISTANT STEEL SUPERIOR IN WELD JOINT REHEAT EMBRITTLEMENT RESISTANCE AND TOUGHNESS AND METHOD OF PRODUCTION OF SAME 有权
标题翻译：焊接接头耐火钢筋耐腐蚀性和韧性及其生产方法
公开(公告)号：US20100132855A1
公开(公告)日：2010-06-03
申请号：US12452200
申请日：2009-03-24
申请人： Yasushi Hasegawa , Masaki Mizoguchi , Yoshiyuki Watanabe , Suguru Yoshida , Tadayoshi Okada
发明人： Yasushi Hasegawa , Masaki Mizoguchi , Yoshiyuki Watanabe , Suguru Yoshida , Tadayoshi Okada
IPC分类号： C21D6/02 , C22C38/00 , C21D8/02 , C22C38/22 , C22C38/44
CPC分类号： C22C38/24 , C21D8/02 , C21D8/0205 , C21D9/46 , C21D9/50 , C21D2211/002 , C21D2211/004 , C21D2211/005 , C21D2211/008 , C22C38/001 , C22C38/06 , C22C38/26
摘要： The present invention provides high temperature strength and fire-resistant steel superior in weld joint reheat embrittlement resistance and toughness which is produced using steel of a room temperature strength of the 400 to 600N/mm2 class containing as main ingredients C: 0.010% to less than 0.05%, Si: 0.01 to 0.50%, Mn: 0.80 to 2.00%, Cr: 0.50% to less than 2.00%, V: 0.03 to 0.30%, Nb: 0.01 to 0.10%, N: 0.001 to 0.010%, and Al: 0.005 to 0.10%, limiting the contents of Ni, Cu, Mo, and B, and satisfying the relationship of 4Cr[%]-5Mo[%]-10Ni[%]-2Cu[%]-Mn[%]>0.
摘要翻译：本发明提供一种高温强度和耐焊接性优异的焊接再热脆化性和韧性，其使用室温强度为400〜600N / mm2级的钢作为主要成分C：0.010〜小于 0.05％，Si：0.01〜0.50％，Mn：0.80〜2.00％，Cr：0.50％〜小于2.00％，V：0.03〜0.30％，Nb：0.01〜0.10％，N：0.001〜0.010％：0.005〜0.10％，限制Ni，Cu，Mo和B的含量，满足4Cr [％] -5Mo [％] -10Ni [％] -2Cu [％] -Mn [％]> 0的关系。

64. 发明申请

US20100108201A1 HIGH-STRENGTH HOT ROLLED STEEL SHEET BEING FREE FROM PEELING AND EXCELLENT IN SURFACE PROPERTIES AND BURRING PROPERTIES, AND METHOD FOR MANUFACTURING THE SAME 有权
标题翻译：高强度热轧钢板不含表皮性能优异的表皮特性和弯曲性能，及其制造方法
公开(公告)号：US20100108201A1
公开(公告)日：2010-05-06
申请号：US12532782
申请日：2008-03-27
申请人： Tatsuo Yokoi , Kazuya Ootsuka , Yukiko Yamaguchi , Tetsuya Yamada
发明人： Tatsuo Yokoi , Kazuya Ootsuka , Yukiko Yamaguchi , Tetsuya Yamada
IPC分类号： C21D11/00 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/08 , C22C38/16 , C21D9/46 , C22C38/58
CPC分类号： C22C38/04 , C21D6/005 , C21D8/00 , C21D8/005 , C21D8/02 , C21D8/0226 , C21D8/0242 , C21D8/0263 , C21D8/04 , C21D8/0405 , C21D8/0426 , C21D8/0442 , C21D8/0463 , C21D9/46 , C21D2211/002 , C21D2211/003 , C21D2211/004 , C21D2211/005 , C22C38/001 , C22C38/02 , C22C38/06 , C22C38/12 , C22C38/14 , C23C2/02 , C23C2/28
摘要： This hot rolled steel contains, in terms of mass %, C: 0.01 to 0.1%, Si: 0.01 to 0.1%, Mn: 0.1 to 3%, P: not more than 0.1%, S: not more than 0.03%, Al: 0.001 to 1%, N: not more than 0.01%, Nb: 0.005 to 0.08%, and Ti: 0.001 to 0.2%, with a remainder being iron and unavoidable impurities, wherein a formula: [Nb]×[C]≦4.34×10−3 is satisfied, a grain boundary density of solid solution C is not less than 1 atom/nm2 and not more than 4.5 atoms/nm2, and a grain size of cementite grains precipitated at grain boundaries within the steel sheet is not more than 1 um. This method for manufacturing a hot rolled steel sheet includes: heating a steel slab having the same composition as the above hot rolled steel sheet at a temperature that is not less than a temperature of SRTmin (° C.) and not more than 1,170° C.; performing rough rolling at a finishing temperature of not less than 1,080° C. and not more than 1,150° C.; subsequently starting finish rolling within not less than 30 seconds and not more than 150 seconds at a temperature of not less than 1,000° C. but less than 1,080° C.; completing the finish rolling within a temperature range from not less than an Ar3 transformation point temperature to not more than 950° C. so as to achieve a final pass reduction ratio of not less than 3% and not more than 15%; and conducting cooling at a cooling rate exceeding 15° C./sec from a cooling start temperature to a temperature within a range from not less than 450° C. to not more than 550° C., and then coiling the steel sheet.
摘要翻译：该热轧钢以质量％计含有C：0.01〜0.1％，Si：0.01〜0.1％，Mn：0.1〜3％，P：0.1％以下，S：0.03％以下，Al ：0.001〜1％，N：0.01％以下，Nb：0.005〜0.08％，Ti：0.001〜0.2％，余量为铁和不可避免的杂质，式中，[Nb]×[C]＆nlE ; 4.34×10-3满足，固溶C的晶界密度为1原子/ nm 2以上且4.5原子/ nm 2以下，在钢板内的晶界析出的渗碳体粒子的粒径为不超过1 um。这种制造热轧钢板的方法包括：在不低于SRTmin（℃）且不大于1170℃的温度下加热具有与上述热轧钢板相同组成的钢坯。在不低于1080℃且不大于1150℃的终轧温度下进行粗轧。随后在不低于1000℃但小于1,080℃的温度下在不少于30秒且不超过150秒内开始精轧。在不低于Ar3相变点温度至不高于950℃的温度范围内完成精轧，以达到不低于3％且不大于15％的最终通过减少率; 以从冷却开始温度超过15℃/秒的冷却速度进行冷却至450℃以上且550℃以下的温度，然后卷取钢板。

65. 发明申请

US20100003541A1 HIGH-STRENGTH HOT DIP GALVANNEALED STEEL SHEET HAVING HIGH POWDERING RESISTANCE AND METHOD FOR PRODUCING THE SAME 有权
标题翻译：具有高耐磨性的高强度热镀锌钢板及其制造方法
公开(公告)号：US20100003541A1
公开(公告)日：2010-01-07
申请号：US12094997
申请日：2006-12-01
申请人： Yuichi Futamura , Michitaka Tsunezawa , Masaaki Miura , Hiroshi Irie , Takatoshi Yoshida , Masafumi Shimizu
发明人： Yuichi Futamura , Michitaka Tsunezawa , Masaaki Miura , Hiroshi Irie , Takatoshi Yoshida , Masafumi Shimizu
IPC分类号： B32B15/18
CPC分类号： C23C2/28 , C21D8/02 , C21D9/46 , C23C2/06 , Y10T428/12799 , Y10T428/12958 , Y10T428/12965 , Y10T428/265
摘要： Disclosed is a high-strength hot dip galvannealed steel sheet having high powdering resistance produced by employing such a constitution that a Fe—Zn alloy plated layer is provided on at least one side of a basis steel sheet and a region in which Al (atomic %)/Zn (atomic %)≧0.10 is present in a thickness of 300 Å or more from the surface of the plated layer along the depth direction of the plated layer. Also disclosed is a hot dip galvannealed steel sheet whose formability is greatly improved by optionally specifying chemical composition and structure of the basis steel sheet.
摘要翻译：本发明公开了一种通过采用这样一种构成，即在基材钢板的至少一面上设置Fe-Zn合金镀层和Al（原子％）的区域制成的耐高耐热性合金化热浸镀锌钢板，）/ Zn（原子％）> = 0.10从镀层的表面沿着镀层的深度方向以厚度为单位存在。还公开了通过任选地指定基础钢板的化学组成和结构，可以大大提高其成形性的热浸镀锌合金化热镀锌钢板。

66. 发明申请

US20090246067A1 HIGH-STRENGTH STEEL SHEET EXCELLENT IN RESISTANCE TO STRESS-RELIEF ANNEALING AND IN LOW-TEMPERATURE JOINT TOUGHNESS 有权
标题翻译：高强度钢板耐应力退火和低温接头韧性优异
公开(公告)号：US20090246067A1
公开(公告)日：2009-10-01
申请号：US12359517
申请日：2009-01-26
申请人： Manabu IZUMI , Makoto Kariyazaki
发明人： Manabu IZUMI , Makoto Kariyazaki
IPC分类号： C22C38/42 , C22C38/00 , C22C38/04 , C22C38/20
CPC分类号： C22C38/02 , C21D1/25 , C21D1/30 , C21D8/02 , C21D9/50 , C21D2211/004 , C22C38/001 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/24 , C22C38/26 , C22C38/28 , C22C38/42 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/58
摘要： A high-strength steel sheet according to the present invention not only is suitably adjusted in its chemical elements composition, but also has a DE value defined by the following Equation (1) of 0.0340% or more, and a carbon equivalent Ceq defined by the following Equation (2) of 0.45% or less: DE value=[Ti]+[Nb]+0.3[V]+0.0075[Cr] (1) where, [Ti], [Nb], [V], and [Cr] represent contents (mass %) of Ti, Nb, V, and Cr, respectively; Ceq=[C]+[Mn]/6+([Cr]+[Mo]+[V])/5+([Cu]+[Ni])/15 (2) where, [C], [Mn], [Cr], [Mo], [V], [Cu], and [Ni] represent contents (mass %) of C, Mn, Cr, Mo, V, Cu, and Ni, respectively. A high-strength steel sheet resistant to strength reduction and good in low-temperature toughness of HAZ even when subjected for a long time to a stress-relief annealing process after being processed by welding, is provided.
摘要翻译：根据本发明的高强度钢板不仅可以适当地调节其化学元素组成，还可以由以下等式（1）定义的DE值为0.0340％以上，由以下公式（2）为0.45％以下：<？in-line-formula description =“In-line Formulas”end =“lead”？> DE value = [Ti] + [Nb] +0.3 [V] +0.0075 [Cr]（1）<？in-line-formula description =“In-line Formulas”end =“tail”？>其中，[Ti]，[Nb]，[V]和[Cr] ％）Ti，Nb，V和Cr; Ceq = [C] + [Mn] / 6 +（[Cr] + [Mo] + [V]）/ 5+的线内公式描述=“In-line formula”end =“lead” （[Cu] + [Ni]）/ 15（2）<？in-line-formula description =“In-line Formulas”end =“tail”？>其中，[C]，[Mn]，[Cr] [Mo]，[V]，[Cu]和[Ni]分别表示C，Mn，Cr，Mo，V，Cu和Ni的含量（质量％）。提供了即使长时间经受焊接加工后的应力消除退火处理，也能够耐强度降低的高强度钢板和HAZ的低温韧性良好。

67. 发明申请

US20090139616A1 Method and Device for the Continuous Creation of a Bainite Structure in a Carbon Steel, Particularly in a Strip Steel 有权
标题翻译：在碳钢，特别是带钢中连续生产贝氏体组织的方法和装置
公开(公告)号：US20090139616A1
公开(公告)日：2009-06-04
申请号：US12084660
申请日：2006-10-31
申请人： Werner Kaiser , Heinz Hofinghoff , Hans-Toni Junius , Michael Hellmann , Peter Ebner , Heribert Lochner
发明人： Werner Kaiser , Heinz Hofinghoff , Hans-Toni Junius , Michael Hellmann , Peter Ebner , Heribert Lochner
IPC分类号： C21D1/63 , C21D6/00
CPC分类号： C21D1/20 , C21D1/25 , C21D1/607 , C21D1/63 , C21D8/02 , C21D8/04 , C21D9/561 , C21D9/563 , C21D9/573 , C21D9/58 , Y02P10/212
摘要： The invention relates to a method for continuously creating a bainite structure in a carbon steel, especially a strip steel. The method comprises the following steps: the carbon steel (1) is austenitized (3) at a temperature exceeding the austenitizing temperature; the austenitized carbon steel (1) is introduced into a bath (2) containing a quenching agent (21) in order to cool the carbon steel (1) to a temperature lying below the austenitizing temperature; the carbon steel (1) is adjusted to the transformation temperature for bainite and is maintained (13) at the transformation temperature for a certain period of time; and the carbon steel is then cooled (17). In order to further develop the method, the carbon steel (1) penetrates a bath (2) containing a quenching agent (21) until a defined percentage of the bainite structure relative to the total structure of the carbon steel (1) has formed in the bath (2) containing the quenching agent (21) following the austenitizing process, residues of the quenching agent (21) are removed from the surface of the carbon steel (1) by blowing the same off when the carbon steel (1) is discharged from the bath (2), and the remaining structure components of the carbon steel (1) are then transformed into bainite in an isothermal tempering station (13) without deflecting the carbon steel (1) at all when the same penetrates the isothermal tempering station (13).
摘要翻译：本发明涉及一种在碳钢，特别是钢带钢中连续生产贝氏体组织的方法。该方法包括以下步骤：在超过奥氏体化温度的温度下将碳钢（1）奥氏体化（3）将奥氏体化碳钢（1）引入含有淬火剂（21）的浴（2）中，以将碳钢（1）冷却至低于奥氏体化温度的温度; 将碳钢（1）调节至贝氏体的转变温度，并在相变温度下保持（13）一定时间; 然后将碳钢冷却（17）。为了进一步开发该方法，碳钢（1）穿透含有淬火剂（21）的浴（2），直到贝氏体组织相对于碳钢（1）的总体结构的规定百分比形成在奥氏体化过程中含有淬火剂（21）的浴（2），通过将碳钢（1）为碳素钢（1）的碳钢（1）的残留物从碳钢（1）的表面除去，淬火剂从浴中排出，然后在等温回火站（13）中将碳钢（1）的其余结构部件转变成贝氏体，而当同样穿过等温回火时，碳钢（1）完全不会发生偏转车站（13）。

68. 发明申请

US20080283158A1 Method for Manufacturing High Tensile Strength Steel Plate 有权
标题翻译：制造高抗拉强度钢板的方法
公开(公告)号：US20080283158A1
公开(公告)日：2008-11-20
申请号：US10585548
申请日：2005-07-06
申请人： Akihide Nagao , Kenji Oi
发明人： Akihide Nagao , Kenji Oi
IPC分类号： C21D8/02 , C22C38/00
CPC分类号： C22C38/02 , C21D8/02 , C22C38/001 , C22C38/04 , C22C38/06
摘要： The present invention provides a method for manufacturing high tensile strength steel plate having 570 MPa (N/mm2) or larger tensile strength and having also extremely superior balance of strength and toughness both before PWHT and after PWHT to that of the conventional steel plates, by specifically specifying the temperature-rising rate at the plate thickness center portion of a quenched and tempered material during tempering, and to be concrete, the method has the steps of: casting a steel consisting essentially of 0.02 to 0.18% C, 0.05 to 0.5% Si, 0.5 to 2.0% Mn, 0.005 to 0.1% Al, 0.0005 to 0.008% N, 0.03% or less P, 0.03% or less S, by mass, and balance of Fe and inevitable impurities; hot-rolling the cast steel without cooling the steel to the Ar3 transformation point or lower temperature, or after reheating the steel to the AC3 transformation point or higher temperature, to a specified plate thickness; cooling the steel by direct quenching from the Ar3 transformation point or higher temperature, or by accelerated cooling, to 400° C. or lower temperature; and then tempering the steel, using a heating apparatus being installed directly connecting the manufacturing line containing a rolling mill and a direct-quenching apparatus or an accelerated cooling apparatus, to 520° C. or above of the maximum ultimate temperature at the plate thickness center portion at an average temperature-rising rate of 1° C./s or larger at the plate thickness center portion up to a specified tempering temperature between 460° C. and the Ac1 transformation point.
摘要翻译：本发明提供一种制造具有570MPa（N / mm 2以上）或更高拉伸强度的高抗拉强度钢板的方法，并且在PWHT之前和PWHT之后还具有非常优异的强度和韧性平衡传统钢板的特征是通过具体指定回火期间淬火回火材料的板厚中心部分的温度上升率，并且为混凝土，该方法具有以下步骤：将基本上由0.02组成的钢浇铸到 0.18％C，0.05〜0.5％Si，0.5〜2.0％Mn，0.005〜0.1％Al，0.0005〜0.008％N，0.03％以下P，0.03％以下S，余量为Fe和不可避免的杂质 ; 热轧铸钢而不将钢冷却至Ar 3 3相变点或更低的温度，或者在将钢再加热到AC 3 3相变点或更高的温度之后，至指定板厚; 通过从Ar 3 N 3相变点或更高温度或通过加速冷却直接淬火至400℃或更低的温度来冷却钢; 然后使用将包含轧机和直接淬火装置或加速冷却装置的生产线直接连接的加热装置回火至钢板厚度中心的最高极限温度的520℃以上在板厚中心部分的平均升温速度为1℃/ s以上，直到460℃与Ac 1 H 1相变点之间的规定回火温度。

69. 发明授权

US07413617B2 Composite structure sheet steel with excellent elongation and stretch flange formability 有权
标题翻译：复合结构钢板具有优异的伸长率和拉伸凸缘成形性
公开(公告)号：US07413617B2
公开(公告)日：2008-08-19
申请号：US11290640
申请日：2005-12-01
申请人： Shushi Ikeda , Koichi Sugimoto , Yoichi Mukai , Hiroshi Akamizu
发明人： Shushi Ikeda , Koichi Sugimoto , Yoichi Mukai , Hiroshi Akamizu
IPC分类号： C22C38/02 , C22C38/06 , C21D8/02
CPC分类号： C21D8/02 , C21D9/46 , C22C1/06 , C22C38/02 , C22C38/04
摘要： The present invention provide a TRIP-type composite structure steel plate of the TPF steel type in which elongation and stretch flange formability at room temperature are improved by controlling the morphology of the second-phase structure. In a composite structure sheet steel comprising 0.02 to 0.12% C, 0.5 to 2.0% Si+Al and 1.0 to 2.0% Mn, with the remainder being Fe and unavoidable impurities, and comprising 80% or more polygonal ferrite (steel structure space factor) and 1 to 7% retained austenite, with the remainder being bainite and/or martensite, wherein the elongation and stretch flange formability of the composite sheet steel are improved by reducing the number of bulky, massive second phases with an aspect ratio of 1:3 or less and a mean grain size of 0.5 μm or more in the second phase of this composite structure, which comprises retained austenite and martensite.
摘要翻译：本发明提供一种TPF钢型的TRIP型复合结构钢板，通过控制第二相结构的形态，提高室温下的伸长率和拉伸凸缘成形性。在包含0.02至0.12％的C，0.5至2.0％的Si + Al和1.0至2.0％Mn的复合结构钢板中，其余为Fe和不可避免的杂质，并且包含80％或更多的多边形铁素体（钢结构空间系数）和1〜7％的残余奥氏体，其余为贝氏体和/或马氏体，其中复合片材钢的伸长率和拉伸凸缘成形性通过减少长宽比为1:3的体积大的质量第二相的数量而得到改善该复合结构的第二相中的平均粒径为0.5μm以上，其包含残留奥氏体和马氏体。

70. 发明申请

US20080149230A1 Cold Rolled Steel Sheet Having Superior Formability, Process for Producing the Same 审中-公开
标题翻译：具有优异成形性的冷轧钢板，其生产方法
公开(公告)号：US20080149230A1
公开(公告)日：2008-06-26
申请号：US11913176
申请日：2006-05-03
申请人： Jeong-Bong Yoon , Sang-Ho Han , Sung-Il Kim , Man-Young Park , Kwang-Geun Chin , Ho-Seok Kim , Jin-Hee Chung
发明人： Jeong-Bong Yoon , Sang-Ho Han , Sung-Il Kim , Man-Young Park , Kwang-Geun Chin , Ho-Seok Kim , Jin-Hee Chung
IPC分类号： C21D8/02 , C22C38/16
CPC分类号： C22C38/004 , C21D8/02 , C21D8/04 , C21D9/46 , C22C38/002 , C22C38/04 , C22C38/06 , C22C38/14 , C22C38/16 , C22C38/60
摘要： Disclosed herein is a Ti-based IF steel in which fine precipitates, such as CuS precipitates, having a size of 0.2 μm or less are distributed. The distribution of fine precipitates in the Ti-based IF steel enhances the yield strength and lowers the in-plane anisotropy index. The nanometer-sized precipitates allow the formation of minute crystal grains. As a result, dissolved carbon is present in a larger amount in the crystal grain boundaries than within the crystal grains, which is advantageous in terms of room-temperature non-aging properties and bake hardenability.
摘要翻译：本发明公开了分散有0.2μm以下的微细析出物，例如CuS析出物的Ti系IF钢。 Ti型IF钢中微细析出物的分布提高了屈服强度，降低了面内各向异性指数。纳米尺寸的析出物允许形成微小的晶粒。结果，溶解碳比晶粒内的晶粒边界更多地存在，这在室温非时效性和烘烤淬透性方面是有利的。

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