公开(公告)号：US08430975B2

公开(公告)日：2013-04-30

申请号：US12864586

申请日：2009-01-19

Applicant: Tatsuya Nakagaito ,  Saiji Matsuoka ,  Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Yoshitsugu Suzuki

Inventor： Tatsuya Nakagaito ,  Saiji Matsuoka ,  Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Yoshitsugu Suzuki

IPC: C22C38/02 ,  C22C38/06 ,  B32B15/18

CPC classification number: C21D8/0263 ,  C21D1/25 ,  C21D8/0436 ,  C21D8/0447 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/38 ,  C23C2/02 ,  Y10T428/12799

Abstract: A high-strength galvanized steel sheet has a TS of at least 590 MPa and excellent ductility and stretch flangeability and a method for manufacturing the high-strength galvanized steel sheet. The galvanized steel sheet contains, on the basis of mass percent, C: 0.05% to 0.3%, Si: 0.01% to 2.5%, Mn: 0.5% to 3.5%, P: 0.003% to 0.100% or less, S: 0.02% or less, and Al: 0.010% to 1.5%. The total of Si and Al is 0.5% to 2.5%. The remainder are iron and incidental impurities, contain 20% or more of ferrite phase, 10% or less of martensite phase, and 10% to 60% of tempered martensite, on the basis of area percent, and 3% to 10% of retained austenite phase on the basis of volume fraction. The retained austenite has an average grain size of 2.0 μm or less.

Abstract translation: 高强度镀锌钢板的TS为至少590MPa，延展性和拉伸凸缘性优异，高强度镀锌钢板的制造方法。 镀锌钢板以质量％计含有C：0.05〜0.3％，Si：0.01〜2.5％，Mn：0.5〜3.5％，P：0.003〜0.100％以下，S：0.02 ％以下，Al：0.010〜1.5％。 Si和Al的总和为0.5％至2.5％。 剩余部分为铁和杂质，基于面积百分比含有20％以上的铁素体相，10％以下的马氏体相和10％〜60％的回火马氏体，3％〜10％的保留 基于体积分数的奥氏体相。 残留奥氏体的平均粒径为2.0μm以下。

公开(公告)号：US20110036465A1

公开(公告)日：2011-02-17

申请号：US12866481

申请日：2009-02-05

Applicant: Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Shinjiro Kaneko ,  Saiji Matsuoka

Inventor： Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Shinjiro Kaneko ,  Saiji Matsuoka

IPC: C23C2/28 ,  B32B15/01 ,  B32B15/18

CPC classification number: C23C28/023 ,  C21D8/0205 ,  C21D8/0405 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  C22C38/38 ,  C23C2/02 ,  C23C2/06 ,  C23C2/28 ,  Y10T428/12799

Abstract: A high strength galvanized steel sheet has a TS of 590 MPa or more and excellent processability. The component composition contains, by mass %, C: 0.05% to 0.3%, Si: 0.7% to 2.7%, Mn: 0.5% to 2.8%, P: 0.1% or lower, S: 0.01% or lower, Al: 0.1% or lower, and N: 0.008% or lower, and the balance: Fe or inevitable impurities. The microstructure contains, in terms of area ratio, ferrite phases: 30% to 90%, bainite phases: 3% to 30%, and martensite phases: 5% to 40%, in which, among the martensite phases, martensite phases having an aspect ratio of 3 or more are present in a proportion of 30% or more.

Abstract translation: 高强度镀锌钢板的TS为590MPa以上，加工性优异。 组分组成以质量％计含有C：0.05％至0.3％，Si：0.7％至2.7％，Mn：0.5％至2.8％，P：0.1％或更低，S：0.01％或更低，Al：0.1 ％以下，N：0.008％以下，余量为Fe或不可避免的杂质。 微观结构以面积比计含有铁素体相：30％〜90％，贝氏体相：3％〜30％，马氏体相：5％〜40％，其中，在马氏体相中，马氏体相具有 3以上的纵横比以30％以上的比例存在。

公开(公告)号：US20100314009A1

公开(公告)日：2010-12-16

申请号：US12864766

申请日：2008-12-12

Applicant: Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Saiji Matsuoka ,  Yoshitsugu Suzuki ,  Koji Maitake

Inventor： Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Saiji Matsuoka ,  Yoshitsugu Suzuki ,  Koji Maitake

IPC: C23C2/28 ,  B32B15/18

CPC classification number: C23C2/06 ,  B32B15/013 ,  C21D9/48 ,  C22C18/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C23C2/02 ,  C23C2/28 ,  Y10T428/12799

Abstract: A high strength galvanized steel sheet having a TS of 780 MPa or more and exhibiting excellent stretch frangeability and bendability and a method for manufacturing the same are provided. The component composition contains C: 0.05% to 0.15%, Si: 0.8% to 2.5%, Mn: 1.5% to 3.0%, P: 0.001% to 0.05%, S: 0.0001% to 0.01%, Al: 0.001% to 0.1%, N: 0.0005% to 0.01%, Cr: 0.1% to 1.0%, Ti: 0.0005% to 0.1%, B: 0.0003% to 0.003%, and the remainder composed of iron and incidental impurities, on a percent by mass basis. The microstructure includes 30% or more of ferrite phase and 30% or more, and 70% or less of martensite phase on an areal fraction basis, wherein regarding the above-described martensite phase, the proportion of a tempered martensite phase is 20% or more relative to the whole martensite phase and the proportion of a martensite phase having a grain diameter of 1 μm or less is 10% or less relative to the whole martensite phase.

Abstract translation: 提供TS为780MPa以上且具有优异的伸缩性和弯曲性的高强度镀锌钢板及其制造方法。 组分组成包含C：0.05％至0.15％，Si：0.8％至2.5％，Mn：1.5％至3.0％，P：0.001％至0.05％，S：0.0001％至0.01％，Al：0.001％至0.1 ％，N：0.0005〜0.01％，Cr：0.1〜1.0％，Ti：0.0005〜0.1％，B：0.0003〜0.003％，余量由铁和杂质构成 。 微结构包含30％以上的铁素体相，30％以上，70％以下的马氏体相，其中，对于上述马氏体相，回火马氏体相的比例为20％， 更相对于整个马氏体相，并且相对于整个马氏体相，具有1μm以下的粒径的马氏体相的比例为10％以下。

公开(公告)号：US06331216B1

公开(公告)日：2001-12-18

申请号：US09214226

申请日：1998-12-30

Applicant: Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Nobuki Tanaka ,  Taro Kanayama ,  Osamu Furukimi ,  Masahiko Morita ,  Takaaki Hira ,  Saiji Matsuoka

Inventor： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Nobuki Tanaka ,  Taro Kanayama ,  Osamu Furukimi ,  Masahiko Morita ,  Takaaki Hira ,  Saiji Matsuoka

IPC: C21D713

CPC classification number: C21D8/10 ,  C21D2201/00 ,  C21D2211/005

Abstract: The steel pipe has a structure composed mainly of ferrite or ferrite plus pearlite or ferrite plus cementite. The steel pipe is characterized by grain size not greater than 3 &mgr;m, preferably not greater than 1 &mgr;m, elongation greater than 20%, tensile strength (TS:MPa) and elongation (E1:%) whose product is greater than 10000, and percent ductile fracture greater than 95%, preferably 100%, measured by Charpy impact test on an actual pipe at −100° C. The structure is characterized by C: 0.005-0.03%, Si: 0.01-3.0%, Mn: 0.01-2.0%, and Al: 0.001-0.10% on a weight basis, and is composed of ferrite or ferrite and a secondary phase, with ferrite grains being not greater than 3 &mgr;m and the secondary phase having an areal ratio not more than 30%. A steel pipe stock having the above-mentioned composition is heated at a temperature of (Ac1+50° C.) to 400° C. and subsequently reduced at a rolling temperature of (Ac1+50° C.) to 400° C. such that the cumulative reduction of diameter is greater than 20%. The reducing is preferably performed such that at least one of rolling passes reduces the diameter by more than 6% per pass. The steel pipe will have high ductility and high strength and will be superior in toughness and stress corrosion cracking resistance, if the content of C, Si, Mn, and other alloying elements is limited low and reducing is performed at the temperature specified above. The resulting steel pipe has good fatigue resistance and is suitable for use as line pipe.

Abstract translation: 钢管具有主要由铁素体或铁素体加珠光体或铁素体和渗碳体组成的结构。 钢管的特征在于，其粒径不大于3μm，优选不大于1μm，伸长率大于20％，拉伸强度（TS：MPa）和伸长率（E1：％）大于10000， 延性断裂大于95％，优选100％，通过夏比冲击试验在-100℃的实际管上测量。该结构的特征在于C：0.005-0.03％，Si：0.01-3.0％，Mn：0.01-2.0 ％，Al：0.001-0.10％，由铁素体或铁素体和二次相组成，铁素体晶粒不大于3μm，第二相的面积比不大于30％。 将具有上述组成的钢管坯料在（Ac1 + 50℃）的温度下加热至400℃，随后在（Ac1 + 50℃）的轧制温度下降低至400℃。 使得直径的累积减小大于20％。 优选地进行还原，使得至少一个轧制通道将直径每次通过减少6％以上。 如果C，Si，Mn和其他合金元素的含量低，并且在上述规定的温度下进行还原，则钢管将具有高延展性和高强度，并且在韧性和耐应力腐蚀开裂性方面优异。 所得钢管具有良好的抗疲劳性能，适用于管线管。

公开(公告)号：US4973367A

公开(公告)日：1990-11-27

申请号：US454923

申请日：1989-12-22

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

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

IPC: C21D8/04

CPC classification number: C21D8/0426 ,  C21D8/0431 ,  C21D8/0463 ,  C21D8/0478

Abstract: 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

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

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

IPC: C21D8/04

CPC classification number: C21D8/0426 ,  B21B2201/04 ,  C21D8/0431 ,  C21D8/0463 ,  C21D8/0478

Abstract: 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.

Abstract translation: 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：US4793401A

公开(公告)日：1988-12-27

申请号：US939543

申请日：1986-12-09

Applicant: Saiji Matsuoka ,  Susumu Satoh ,  Takashi Obara ,  Kozo Tsunoyama ,  Hideo Abe

Inventor： Saiji Matsuoka ,  Susumu Satoh ,  Takashi Obara ,  Kozo Tsunoyama ,  Hideo Abe

IPC: B21B1/28 ,  B21B1/34 ,  B21B1/40 ,  B21B1/46 ,  B21B9/00 ,  C21D8/02 ,  B21B13/22 ,  B22D11/12

CPC classification number: B21B1/46 ,  B21B1/28 ,  B21B1/34 ,  C21D8/0226 ,  B21B1/40 ,  B21B2201/04 ,  B21B2261/20 ,  B21B2275/06 ,  B21B9/00 ,  C21D8/0231 ,  C21D8/0263 ,  Y10T29/49991

Abstract: Thin steel sheets having an improved processability are produced when a steel sheet or cast strip obtained through a continuous casting or strip caster process is subjected to a lubrication rolling step at a temperature of from Ar.sub.3 transformation point to 300.degree. C. and a rolling speed of not less than 1,500 m/min. By this method, the cold rolling step or cold rolling-annealing step can be omitted.

Abstract translation: 当通过连续铸造或连续铸造法得到的钢板或铸钢带在Ar 3相变点至300℃的温度下进行润滑轧制步骤时，生产具有改善加工性能的薄钢板，并且轧制速度 不低于1500米/分。 通过该方法，可以省略冷轧工序或冷轧退火工序。

公开(公告)号：US09011614B2

公开(公告)日：2015-04-21

申请号：US12866469

申请日：2009-01-28

Applicant: Tatsuya Nakagaito ,  Saiji Matsuoka ,  Yoshitsugu Suzuki ,  Yuki Toji

Inventor： Tatsuya Nakagaito ,  Saiji Matsuoka ,  Yoshitsugu Suzuki ,  Yuki Toji

IPC: C22C38/00 ,  C22C38/08 ,  C22C38/18 ,  C23C2/02 ,  C22C38/02 ,  C21D1/25 ,  C21D6/00 ,  C21D8/04 ,  C22C38/04 ,  C22C38/06

CPC classification number: C22C38/02 ,  C21D1/25 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0463 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06 ,  Y10T428/12799

Abstract: A high-strength galvanized steel sheet has excellent mechanical properties such as a TS of 1200 MPa or more, an El of 13% or more, and a hole expansion ratio of 50% or more and a method for manufacturing the same. A high-strength galvanized steel sheet excellent in formability contains 0.05% to 0.5% C, 0.01% to 2.5% Si, 0.5% to 3.5% Mn, 0.003% to 0.100% P, 0.02% or less S, and 0.010% to 0.5% Al on a mass basis, the remainder being Fe and unavoidable impurities, and has a microstructure which contains 0% to 10% ferrite, 0% to 10% martensite, and 60% to 95% tempered martensite on an area basis as determined by structure observation and which further contains 5% to 20% retained austenite as determined by X-ray diffractometry.

Abstract translation: 高强度镀锌钢板的TS为1200MPa以上，E1为13％以上，孔膨胀率为50％以上的机械特性及其制造方法。 成型性优异的高强度镀锌钢板包含0.05〜0.5％的C，0.01〜2.5％的Si，0.5〜3.5％的Mn，0.003〜0.100％的P，0.02％以下的S，0.010〜0.5 ％Al，其余为Fe和不可避免的杂质，并且具有包含0％至10％铁素体，0％至10％马氏体和60％至95％回火马氏体的微观结构，其面积基于由 结构观察，并且通过X射线衍射法确定还包含5％至20％的残余奥氏体。

公开(公告)号：US20110240176A1

公开(公告)日：2011-10-06

申请号：US13131758

申请日：2009-11-27

Applicant: Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Saiji Matsuoka

Inventor： Shinjiro Kaneko ,  Yoshiyasu Kawasaki ,  Tatsuya Nakagaito ,  Saiji Matsuoka

IPC: C21D8/02 ,  C22C38/18 ,  C22C38/00 ,  C22C38/22 ,  C21D11/00 ,  B32B15/01

CPC classification number: C23C2/06 ,  C21D1/25 ,  C21D1/26 ,  C21D8/0463 ,  C21D8/0473 ,  C21D9/48 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/38 ,  C23C2/02 ,  C23C2/28

Abstract: A high-strength cold-rolled steel sheet and high-strength galvanized steel sheet has a TS of 1180 MPa or more and excellent formability including stretch flangeability and bendability. The high-strength cold-rolled steel sheet contains 0.05% to 0.3% C, 0.5% to 2.5% Si, 1.5% to 3.5% Mn, 0.001% to 0.05% P, 0.0001% to 0.01% S, 0.001% to 0.1% Al, 0.0005% to 0.01% N, and 1.5% or less Cr (including 0%) on a mass basis, the remainder being Fe and unavoidable impurities.

Abstract translation: 高强度冷轧钢板和高强度镀锌钢板的TS为1180MPa以上，成型性优异，包括拉伸凸缘性和弯曲性。 高强度冷轧钢板含有0.05〜0.3％的Si，0.5〜2.5％的Si，1.5〜3.5％的Mn，0.001〜0.05％的P，0.0001〜0.01％的S，0.001〜0.1％ Al，0.0005％〜0.01％N，1.5％以下Cr（含0％），余量为Fe和不可避免的杂质。

公开(公告)号：US20110030854A1

公开(公告)日：2011-02-10

申请号：US12865527

申请日：2009-01-29

Applicant: Hiroshi Matsuda ,  Reiko Mizuno ,  Yoshimasa Funakawa ,  Yasushi Tanaka ,  Tatsuya Nakagaito ,  Saiji Matsuoka

Inventor： Hiroshi Matsuda ,  Reiko Mizuno ,  Yoshimasa Funakawa ,  Yasushi Tanaka ,  Tatsuya Nakagaito ,  Saiji Matsuoka

IPC: C21D11/00 ,  C22C38/00 ,  C21D8/02 ,  C22C38/04 ,  C22C38/18 ,  C22C38/12 ,  C22C38/02 ,  C22C37/06 ,  C22C38/60

CPC classification number: C23C2/06 ,  C21D1/25 ,  C21D6/005 ,  C21D8/0426 ,  C21D8/0436 ,  C21D8/0447 ,  C21D8/0468 ,  C21D2211/002 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C23C2/02 ,  C23C2/28

Abstract: A high strength steel sheet has a tensile strength of 900 MPa or higher that can achieve both high strength and good formability and a composition including, on a mass basis, C: 0.1% or more and 0.3% or less; Si: 2.0% or less; Mn: 0.5% or more and 3.0% or less; P: 0.1% or less; S: 0.07% or less; Al: 1.0% or less; and N: 0.008% or less, with the balance Fe and incidental impurities. The steel sheet microstructure includes, on an area ratio basis, 5% or more and 80% or less of ferrite, 15% or more of autotempered martensite, 10% or less of bainite, 5% or less of retained austenite, and 40% or less of as-quenched martensite; the mean hardness of the autotempered martensite is HV≦700; and the mean number of precipitated iron-based carbide grains each having a size of 5 nm or more and 0.5 μm or less and included in the autotempered martensite is 5×104 or more per 1 mm2.

Abstract translation: 高强度钢板的拉伸强度为900MPa以上，能够实现高强度和良好的成形性，并且以质量计含有C：0.1％以上且0.3％以下的组合物。 Si：2.0％以下; Mn：0.5％以上3.0％以下， P：0.1％以下; S：0.07％以下 Al：1.0％以下; N：0.008％以下，余量为Fe和杂质。 钢板微结构以面积比为基准，5％以上且80％以下的铁素体，15％以上的自回火马氏体，10％以下的贝氏体，5％以下的残留奥氏体和40质量％ 或更少的淬火马氏体; 自回火马氏体的平均硬度为HV＆nlE; 700; 并且包含在自回火马氏体中的尺寸为5nm以上且0.5μm以下的析出铁素体的平均粒子数为5×104以上。