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：US5139580A

公开(公告)日：1992-08-18

申请号：US555171

申请日：1990-07-18

申请人： Klaus Freier ,  Walter Zimnik

发明人： Klaus Freier ,  Walter Zimnik

IPC分类号： C21D9/48 ,  C21D8/04 ,  C22C38/00 ,  C22C38/06 ,  C22C38/14

CPC分类号： C21D8/0426 ,  C22C38/06 ,  C22C38/14 ,  C21D8/0436 ,  C21D8/0473

摘要： In order to produce sheet possessing good forming properties, in particular for rotationally symmetrical deep-drawings, a low-carbon steel containing not more that 0.009% N is alloyed with 0.01 to 0.94% Ti and in certain cases with 0.01 to 0.06% Nb and continuously cast. The plate slabs are heated to a temperature above 1120 degrees Celsius, rolled to obtain a hot strip above the Ar.sub.3 point, and would at 520.+-.100 degrees Celsius. After cold rolling to the desired fine sheet thickness, the steel strip is annealed by recrystallizaiton, skin-passes and made into sheets.

摘要翻译： 为了生产具有良好成形性能的片材，特别是用于旋转对称的深刻图，含有不多于0.009％N的低碳钢与0.01-0.94％的Ti合金化，并且在某些情况下与0.01-0.06％的Nb和 不断投下 将板坯加热到高于1120摄氏度的温度，轧制以获得高于Ar3点的热带，并且将在520 +/- 100摄氏度。 在冷轧至所需的细片厚度后，钢带通过重结晶退火，经过并制成片材。

公开(公告)号：US4973367A

公开(公告)日：1990-11-27

申请号：US454923

申请日：1989-12-22

申请人： Saiji Matsuoka ,  Susumu Satoh ,  Toshiyuki Katoh ,  Hideo Abe ,  Ikuo Yarita

发明人： Saiji Matsuoka ,  Susumu Satoh ,  Toshiyuki Katoh ,  Hideo Abe ,  Ikuo Yarita

IPC分类号： C21D8/04

CPC分类号： C21D8/0426 ,  C21D8/0431 ,  C21D8/0463 ,  C21D8/0478

摘要： A method of manufacturing a steel sheet having excellent deep-drawability. A steel blank is rolled into a steel sheet having a predetermined thickness. The steel contains C: not more than 0.008 wt %, Si: not more than 0.5 wt %, Mn: not more than 1.0 wt %, P: not more than 0.15 wt %, S: not more than 0.02 wt %, Al: 0.010 to 0.10 wt %, N: not more than 0.008 wt %, and at least one element selected from the group consisting of Ti and Nb which is contained in an amount satisfying the relationship of 1.2 (C/12+N/14).ltoreq.(Ti/48+Nb/93). In at least one pass, rolling is conducted within a temperatures range lower than the Ar3 transformation point but not lower than 500.degree. C., in such a manner that the roll radius R (mm) and the blank thickness t (mm) before rolling by rolls satisfy the relationships of R.ltoreq.200 and R.sup.2 .times..sqroot.t.ltoreq.100000, and the total rolling reduction at temperature lower than the Ar3 transformation point is not lower than 60%. The hot-rolled steel sheet possesses a high level of Lankford value, and is free from cold-working embrittlement. The method may include the step of obtaining, after the rolling, pickling, annealing and hot dip galvanizing under certain conditions, a surface-treated steel sheet having excellent deep-drawability.

公开(公告)号：US4861390A

公开(公告)日：1989-08-29

申请号：US835052

申请日：1986-02-28

申请人： Susumu Satoh ,  Saiji Matsuoka ,  Takashi Obara ,  Kozo Tsunoyama ,  Toshio Irie

发明人： Susumu Satoh ,  Saiji Matsuoka ,  Takashi Obara ,  Kozo Tsunoyama ,  Toshio Irie

IPC分类号： C21D8/04

CPC分类号： C21D8/0426 ,  B21B2201/04 ,  C21D8/0431 ,  C21D8/0463 ,  C21D8/0478

摘要： A method of manufacturing formable as-rolled thin steel sheets having excellent ridging resistance and other properties is disclosed, which comprises rolling a low carbon steel to a given thickness without cold rolling and recrystallization annealing steps. In this rolling, at least one rolling pass is carried out within a given temperature range at high draft and high strain rate.

摘要翻译： 公开了一种制造具有优异的抗皱性等特性的可成形的轧制薄钢板的方法，其包括在不进行冷轧和再退火退火步骤的情况下将低碳钢轧制至给定厚度。 在该轧制中，在给定的温度范围内，在高吃水和高应变率下进行至少一个轧制道次。

公开(公告)号：US4504326A

公开(公告)日：1985-03-12

申请号：US539678

申请日：1983-10-06

申请人： Yoshikuni Tokunaga ,  Masato Yamada

发明人： Yoshikuni Tokunaga ,  Masato Yamada

IPC分类号： C21D8/04 ,  C22C38/12 ,  C23C2/06

CPC分类号： C22C38/12 ,  C21D8/0426 ,  C23C2/06 ,  C21D8/0436 ,  C21D8/0473 ,  C21D8/0478

摘要： Method for the production of a cold rolled steel sheet which has a distinguished deep drawability as well as chemical treating ability by the steps of providing a very low carbon steel, adding Ti and Nb in combination to said steel, hot rolling and cold rolling said steel to produce a cold rolled steel sheet, and subjecting said cold rolled steel sheet to a continuous anneal at a temperature of more than 700.degree. C. to less than the Ac.sub.3 transformation point.

摘要翻译： 通过提供非常低碳钢的步骤，具有显着的深冲性和化学处理能力的冷轧钢板的生产方法，将Ti和Nb组合加入到所述钢中，热轧和冷轧所述钢 制造冷轧钢板，并将该冷轧钢板在大于700℃至小于Ac 3相变点的温度下进行连续退火。

公开(公告)号：US4478649A

公开(公告)日：1984-10-23

申请号：US464067

申请日：1983-02-04

申请人： Osamu Akisue ,  Seiryo Hatae ,  Hiroaki Toki ,  Kichi Nakazawa ,  Atsuhiro Wakako

发明人： Osamu Akisue ,  Seiryo Hatae ,  Hiroaki Toki ,  Kichi Nakazawa ,  Atsuhiro Wakako

IPC分类号： B21B3/00 ,  C21D8/02 ,  C21D8/04 ,  C21D9/46 ,  C21D9/48 ,  C21D9/68 ,  C22C38/00 ,  C22C38/06

CPC分类号： C21D8/0426 ,  C21D8/02

摘要： In a method for producing a cold-rolled steel sheet by continuously casting, hot-rolling, cold-rolling, and continuously annealing Al-killed steel, it is known to coil a hot-rolled strip at a coiling temperature of 630.degree. C. to 710.degree. C. so as to attain satisfactory precipitation of AlN in the hot-rolling step. When the direct-rolling of a continuously cast strand (DR method) is employed to produce a cold-rolled strip, it is impossible to attain satisfactory precipitation of AlN even by carrying out the known coiling method. The present invention is characterized in that an extremely high coiling temperature of at least 780.degree. C. is used to essentially prevent aging due to the precipitation of AlN, and, further, the carbon content of a continuously cast slab is 0.005% at the highest so as to essentially prevent the occurrence of orange peel. Heat conservation due to use of the DR method and excellent properties of the cold-rolled steel strip are simultaneously attained.

摘要翻译： 在通过连续铸造，热轧，冷轧和连续退火Al镇静钢的冷轧钢板的制造方法中，已知在630℃的卷取温度下卷取热轧带材 到710℃，以便在热轧步骤中获得令人满意的AlN的沉淀。 当使用连续铸造线材（DR法）的直接轧制来制造冷轧带材时，即使采用已知的卷取方法也不可能获得令人满意的AlN的析出。 本发明的特征在于，使用极高的至少780℃的卷取温度来基本上防止由于AlN的沉淀引起的老化，此外，连续铸造的板坯的碳含量最高为0.005％ 以便基本上防止橙皮的发生。 同时获得使用DR法的热保存和冷轧钢带的优异性能。

公开(公告)号：US4397699A

公开(公告)日：1983-08-09

申请号：US311651

申请日：1981-10-15

申请人： Nobuyuki Takahashi ,  Yoshikuni Furuno

发明人： Nobuyuki Takahashi ,  Yoshikuni Furuno

IPC分类号： C21D8/04

CPC分类号： C21D8/0426 ,  C21D8/0436 ,  C21D8/0473

摘要： Process for producing a deep-drawing cold rolled steel strip by continuous annealing which comprises hot rolling a steel containing not more than 0.06% C, not more than 0.40% Mn, 0.0005 to 0.0020% B, the ratio of B/N being in the range from 0.5 to 1.5 and the balance being iron and unavoidable impurities, coiling the hot rolled steel strip at a temperature not higher than 680.degree. C., cold rolling and continuously annealing the hot rolled strip.The process produces super deep-drawing cold rolled steel strips without overageing treatment.

摘要翻译： 通过连续退火生产深冲冷轧钢带的方法，其包括热轧含有不大于0.06％C，不大于0.40％Mn，0.0005至0.0020％B的钢，B / N在 范围为0.5〜1.5，余量为铁和不可避免的杂质，在不高于680℃的温度下卷取热轧钢带，冷轧并连续退火热轧带材。 该工艺生产超深拉深冷轧钢带，无需过度处理。

公开(公告)号：US4374682A

公开(公告)日：1983-02-22

申请号：US195654

申请日：1980-10-09

申请人： Mitsunobu Abe ,  Ikushi Yoshida ,  Munetsugu Matsuo ,  Hiroshi Hayakawa

发明人： Mitsunobu Abe ,  Ikushi Yoshida ,  Munetsugu Matsuo ,  Hiroshi Hayakawa

IPC分类号： C21D9/46 ,  C21D8/04 ,  C21D9/48 ,  C21D9/52

CPC分类号： C21D9/48 ,  C21D8/0473 ,  C21D8/0426 ,  C21D9/52

摘要： A process for producing a cold rolled steel strip having excellent workability by a short-time continuous annealing, which process is constituted by hot rolling a low carbon steel slab of steel having a carbon content of from about 0.003 to 0.08% into a steel strip; cold rolling the hot rolled steel strip; rapidly heating the cold rolled steel strip to a recrystallization temperature range at a heating rate not less than 40.degree. C./second; slowly heating the thus rapidly heated steel strip to an annealing temperature at a heating rate ranging from 5.degree. to 30.degree. C./second; annealing the thus slowly heated steel strip at an annealing temperature T which is no lower than 700.degree. C. and no higher than the A.sub.3 transformation temperature and for an annealing time t no shorter than [8-0.03 (T-680)] seconds and no longer than [80-0.15 (T-680)] seconds, initially slowly cooling the thus annealed steel strip at a cooling rate less than 50.degree. C./second, and then rapidly cooling the strip at a cooling rate not less than 50.degree. C./second from a temperature T.sub.Q ranging from higher than 600.degree. C. to no higher than [T-0.027 (T-680)(.sqroot.t+23.7)].degree. C. to an over-ageing temperature range; and subjecting the thus cooled steel strip to an over-ageing treatment at a temperature ranging from 300.degree. to 500.degree. C. for a period of time ranging from 10 seconds to 5 minutes.

摘要翻译： 一种通过短时间连续退火制造具有优异加工性的冷轧钢带的方法，该方法通过将碳含量为约0.003至0.08％的钢的低碳钢板坯热轧到钢带中而构成; 冷轧热轧钢带; 以不低于40℃/秒的加热速率将冷轧钢带快速加热至重结晶温度范围; 将这样快速加热的钢带缓慢加热至退火温度，加热速率范围为5℃至30℃/秒; 在不低于700℃，不高于A3转化温度的退火温度T和不低于[8-0.03（T-680）]秒的退火时间t退火如此缓慢加热的钢带，并且 不超过[80-0.15（T-680）]秒，最初以低于50℃/秒的冷却速率缓慢地冷却由此退火的钢带，然后以不小于50的冷却速率快速冷却带材 从高于600℃至不高于[T-0.027（T-680）（2ROOT t + 23.7）]℃的温度TQ至过老化温度范围; 并将这样冷却的钢带在300℃至500℃的温度范围内进行过时效处理10秒至5分钟的时间。

公开(公告)号：US4336080A

公开(公告)日：1982-06-22

申请号：US208537

申请日：1980-11-20

申请人： Kazuhide Nakaoka ,  Akihiko Nishimoto ,  Yoshihiro Hosoya

发明人： Kazuhide Nakaoka ,  Akihiko Nishimoto ,  Yoshihiro Hosoya

IPC分类号： B21B3/00 ,  B21B3/02 ,  C21D1/18 ,  C21D8/02 ,  C21D8/04 ,  C21D9/46 ,  C21D9/48 ,  C22C38/00 ,  C22C38/04

CPC分类号： C21D8/0473 ,  C21D1/18 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C21D8/0426

摘要： A method for manufacturing a high-strength cold-rolled steel strip excellent in press-formability, which comprises the steps of: preparing a slab of an aluminum-killed steel consisting essentially of, in weight percentage:______________________________________ Carbon from 0.02 to 0.06%, Manganese from 0.06 to 0.25%, Phosphorus from 0.01 to 0.06%, Soluble aluminum from 0.020 to 0.060%, Nitrogen up to 0.005%, and ______________________________________ the balance iron and incidental impurities;hot-rolling said slab to prepare a hot-rolled steel strip; coiling said steel strip at a temperature within the range of from 650.degree. to 770.degree. C.; cold-rolling said hot-rolled steel strip thus coiled to prepare a cold-rolled steel strip; subjecting said cold-rolled steel strip to a continuous annealing treatment for a prescribed period of time at a temperature within the range of from 750.degree. to 880.degree. C.; cooling said cold-rolled steel strip continuously annealed at a cooling rate of at least: exp {-5.6 (Cwt. %.gamma.+Mn wt. %/6+Si wt. %/24)+7.8} .degree.C./sec from a temperature region of from Ar.sub.1 to Ar.sub.1 +60.degree. C. to convert the structure thereof into a dual-phase structure of ferrite and a low-temperature transformation phase; and then, subjecting said cold-rolled steel strip having said dual-phase structure to an over-ageing treatment for a prescribed period of time at a temperature within the range of from 260.degree. to 360.degree. C.

摘要翻译： 一种制造压制成型性优异的高强度冷轧钢带的方法，包括以下步骤：制备基本上由重量百分数计的铝 - 镇静钢的板坯 - 0.02〜0.06％的碳钢， - 锰为0.06〜0.25％，磷为0.01〜0.06％， - 可溶性铝为0.020〜0.060％，氮为0.005％以下，余量为铁和杂质; 热轧所述板坯以制备热轧钢带; 将所述钢带卷绕在650〜770℃的温度范围内。 冷轧所述热轧钢带，由此卷成制备冷轧钢带; 在750〜880℃的温度范围内对所述冷轧钢带进行连续退火处理规定的时间; 冷却所述冷轧钢带以至少：exp {-5.6（Cwt。％γ+ Mn wt。％/ 6 + Si wt。％/ 24）+7.8}℃/ s的冷却速率连续退火 将Ar1〜Ar1 + 60℃的温度区域变换成铁素体和低温相变相的双相组织， 然后将所述具有所述双相结构的所述冷轧钢带在260至360℃的温度范围内进行过时效处理规定的时间。

公开(公告)号：US3928083A

公开(公告)日：1975-12-23

申请号：US44895874

申请日：1974-03-07

申请人： NIPPON STEEL CORP

发明人： GONDO HISASHI ,  TAKECHI HIROSHI ,  NAMBA KAZUO ,  USUDA MATSUO ,  KAWASAKI KOUICHI

IPC分类号： C21C7/04 ,  C21D8/04 ,  C21D9/46 ,  C22C33/04 ,  C22C38/00 ,  C22C38/14 ,  C21D7/02 ,  C21D7/13

CPC分类号： C22C38/002 ,  C21D8/04 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0473 ,  C22C38/14

摘要： A process for producing an enamelling steel sheet which comprises tapping molten steel with manganese content not more than 0.40%, lowering the carbon content in the molten steel to not more than 0.01%, adding titanium to the molten steel in an amount enough to obtain a titanium content between 0.01 and 0.3%, preferably between 0.03 and 0.1%, and also adding one or more of rare earth elements such as lanthanum, cerium, neodymium, praseodymium, and samarium (hereinafter called Rem) in total amount between 0.01 and 0.15%, preferably 0.02 and 0.12%, casting the molten steel into ingot or slab, hot rolling and then cold rolling the ingot or slab preferably at a cold rolling rate between 30 and 90% and then annealing the steel sheet.

摘要翻译： 一种搪瓷钢板的制造方法，其特征在于，以锰含量不大于0.40％的钢水进行脱硫，将钢水中的碳含量降低至0.01％以下，向钢水中添加足够量的钛， 钛含量在0.01和0.3％之间，优选在0.03和0.1％之间，并且还添加一种或多种稀土元素如镧，铈，钕，镨和钐（以下称为Rem），总量为0.01至0.15％ ，优选为0.02和0.12％，将钢水浇铸成锭或板坯，热轧，然后以30〜90％的冷轧速度冷轧锭坯或板坯，然后退火钢板。