公开(公告)号：US09708680B2

公开(公告)日：2017-07-18

申请号：US14391899

申请日：2012-04-12

申请人： Chikara Kami ,  Yuta Tamura ,  Takato Tamai ,  Shuji Kawamura

发明人： Chikara Kami ,  Yuta Tamura ,  Takato Tamai ,  Shuji Kawamura

IPC分类号： C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C21D6/00 ,  C21D9/46 ,  E04C3/32

CPC分类号： C21D8/0263 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  E04C3/32

摘要： A hot rolled steel sheet for a square column for building structural members, the hot rolled steel sheet having a composition of, in terms of % by mass, C: 0.07 to 0.18%, Mn: 0.3 to 1.5%, P: 0.03% or less, S: 0.015% or less, N: 0.006% or less, Al: 0.01 to 0.06%, and the balance being Fe and unavoidable impurities, and having a microstructure that includes a primary phase constituted of ferrite and a second phase constituted of pearlite or pearlite and bainite, wherein a second phase frequency defined by equation (1) below is 0.20 to 0.42 and a mean crystal grain diameter of the primary phase and the second phase together is 7 to 15 μm Second phase frequency=(Number of second phase grains intersecting line segments of particular length)/(Number of primary phase grains and second phase grains intersecting line segments of particular length)  (1).

公开(公告)号：US20150292054A1

公开(公告)日：2015-10-15

申请号：US14391899

申请日：2012-04-12

申请人： Chikara Kami ,  Yuta Tamura ,  Takato Tamai ,  Shuji Kawamura

发明人： Chikara Kami ,  Yuta Tamura ,  Takato Tamai ,  Shuji Kawamura

IPC分类号： C21D8/02 ,  C21D6/00 ,  C22C38/14 ,  E04C3/32 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D9/46 ,  C22C38/12

CPC分类号： C21D8/0263 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0226 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  E04C3/32

摘要： A hot rolled steel sheet for a square column for building structural members, the hot rolled steel sheet having a composition of, in terms of % by mass, C: 0.07 to 0.18%, Mn: 0.3to 1.5%, P: 0.03% or less, S: 0.015% or less, N: 0.006% or less, Al: 0.01 to 0.06%, and the balance being Fe and unavoidable impurities, and having a microstructure that includes a primary phase constituted of ferrite and a second phase constituted of pearlite or pearlite and bainite, wherein a second phase frequency defined by equation (1) below is 0.20 to 0.42 and a mean crystal grain diameter of the primary phase and the second phase together is 7 to 15 μm Second phase frequency=(Number of second phase grains intersecting line segments of particular length)/(Number of primary phase grains and second phase grains intersecting line segments of particular length)   (1).

摘要翻译： 作为建筑构件的方柱用热轧钢板，以质量％计为C：0.07〜0.18％，Mn：0.3〜1.5％，P：0.03％的组成的热轧钢板或 S：0.015％以下，N：0.006％以下，Al：0.01〜0.06％，余量为Fe和不可避免的杂质，具有由铁素体构成的主相和由 珠光体或珠光体和贝氏体，其中由下式（1）定义的第二相频率为0.20〜0.42，一次相和第二相的平均晶粒直径为7〜15μm第二相频率=（秒数 相位晶粒与特定长度的线段相交）/（主相晶粒和第二相晶粒数量与特定长度的线段相交）（1）。

公开(公告)号：US20140290807A1

公开(公告)日：2014-10-02

申请号：US14131793

申请日：2012-06-13

申请人： Sota Goto ,  Hiroshi Nakata ,  Chikara Kami ,  Toshifumi Abe ,  Takato Tamai

发明人： Sota Goto ,  Hiroshi Nakata ,  Chikara Kami ,  Toshifumi Abe ,  Takato Tamai

IPC分类号： C22C38/58 ,  C22C38/54 ,  C22C38/50 ,  C22C38/48 ,  C22C38/00 ,  C22C38/44 ,  C22C38/42 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C21D8/02 ,  C22C38/46

CPC分类号： C22C38/58 ,  C21D8/0263 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

摘要： A low yield ratio and high-strength hot rolled steel sheet having a composition containing, on a mass percent basis, 0.03% to 0.10% C, 0.10% to 0.50% Si, 1.4% to 2.2% Mn, 0.005 % to 0.10% Al, 0.02% to 0.10% Nb, 0.001% to 0.030% Ti, 0.05% to 0.50% Mo, 0.05% to 0.50% Cr, and 0.01% to 0.50% Ni, in which Moeq preferably satisfies the range of 1.4% to 2.2%; and a microstructure including a main phase that contains bainitic ferrite having an average grain size of 10 μm or less and a secondary phase that contains massive martensite having an aspect ratio of less than 5.0 in an area ratio of 1.4% to 15%.

摘要翻译： 低成品率和高强度热轧钢板，其组成为：以质量％计含有C：0.03〜0.10％，Si：0.10〜0.50％，Mn：1.4〜2.2％，Al：0.005〜0.10％ ，Nb：0.02〜0.10％，Ti：0.001〜0.030％，Mo：0.05〜0.50％，Ni：0.01〜0.50％，Moeq优选为1.4〜2.2％ ; 以及包含平均粒径为10μm以下的贝氏体铁素体的主相和在纵横比小于5.0的大量马氏体的面积比为1.4％〜15％的二次相的显微组织。

公开(公告)号：US07879287B2

公开(公告)日：2011-02-01

申请号：US11049836

申请日：2005-02-03

申请人： Takashi Kobayashi ,  Hiroshi Nakata ,  Chikara Kami ,  Toru Inazumi ,  Shuji Kawamura

发明人： Takashi Kobayashi ,  Hiroshi Nakata ,  Chikara Kami ,  Toru Inazumi ,  Shuji Kawamura

IPC分类号： C22C38/60 ,  C22C38/14 ,  C22C38/12 ,  C22C38/00 ,  C21D9/08 ,  C21D9/52 ,  C21D8/02

CPC分类号： C21D8/0226 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16

摘要： A hot-rolled steel sheet for high-strength ERW pipes contains about 0.02% to about 0.06% C; about 0.05% to about 0.50% Si; about 0.5% to about 1.5% Mn; about 0.010% or less P; about 0.0010% or less S; about 0.01% to about 0.10% Al; about 0.01% to about 0.10% Nb; about 0.001% to about 0.025% Ti; about 0.001% to about 0.005% Ca; about 0.003% or less 0; and about 0.005% or less N, and at least one element selected from the group consisting of about 0.01% to about 0.10% V; about 0.01% to about 0.50% Cu; about 0.01% to about 0.50% Ni; and about 0.01% to about 0.50% Mo on the basis of mass. The group of C, Si, Mn, Cu, Ni, Mo, and V and the group of Ca, 0, and S satisfy specific relationships, and the microstructure of the steel sheet is composed of about 95% by volume or more bainitic ferrite.

摘要翻译： 用于高强度ERW管的热轧钢板含有约0.02％至约0.06％的C; 约0.05％至约0.50％的Si; 约0.5％至约1.5％的Mn; 约0.010％以下P; 约0.0010％以下S; 约0.01％至约0.10％的Al; 约0.01％至约0.10％的Nb; 约0.001％至约0.025％的Ti; 约0.001％至约0.005％的Ca; 约0.003％以下0; 和约0.005％以下的N，以及选自约0.01％至约0.10％V的至少一种元素; 约0.01％至约0.50％的Cu; 约0.01％至约0.50％的Ni; 和基于质量的约0.01％至约0.50％的Mo。 C，Si，Mn，Cu，Ni，Mo和V组以及Ca，O和S组的组合满足特定关系，钢板的微结构由约95体积％以上的贝氏体铁素体 。

公开(公告)号：US20050183798A1

公开(公告)日：2005-08-25

申请号：US11049836

申请日：2005-02-03

申请人： Takashi Kobayashi ,  Hiroshi Nakata ,  Chikara Kami ,  Toru Inazumi ,  Shuji Kawamura

发明人： Takashi Kobayashi ,  Hiroshi Nakata ,  Chikara Kami ,  Toru Inazumi ,  Shuji Kawamura

IPC分类号： C22C38/04 ,  C21D8/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/50 ,  C22C38/54 ,  C21D9/08 ,  C21D9/52

CPC分类号： C21D8/0226 ,  C22C38/02 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  C22C38/16

摘要： A hot-rolled steel sheet for high-strength ERW pipes contains about 0.02% to about 0.06% C; about 0.05% to about 0.50% Si; about 0.5% to about 1.5% Mn; about 0.010% or less P; about 0.0010% or less S; about 0.01% to about 0.10% Al; about 0.01% to about 0.10% Nb; about 0.001% to about 0.025% Ti; about 0.001% to about 0.005% Ca; about 0.003% or less 0; and about 0.005% or less N, and at least one element selected from the group consisting of about 0.01% to about 0.10% V; about 0.01% to about 0.50% Cu; about 0.01% to about 0.50% Ni; and about 0.01% to about 0.50% Mo on the basis of mass. The group of C, Si, Mn, Cu, Ni, Mo, and V and the group of Ca, 0, and S satisfy specific relationships, and the microstructure of the steel sheet is composed of about 95% by volume or more bainitic ferrite.

摘要翻译： 用于高强度ERW管的热轧钢板含有约0.02％至约0.06％的C; 约0.05％至约0.50％的Si; 约0.5％至约1.5％的Mn; 约0.010％以下P; 约0.0010％以下S; 约0.01％至约0.10％的Al; 约0.01％至约0.10％的Nb; 约0.001％至约0.025％的Ti; 约0.001％至约0.005％的Ca; 约0.003％以下0; 和约0.005％以下的N，以及选自约0.01％至约0.10％V的至少一种元素; 约0.01％至约0.50％的Cu; 约0.01％至约0.50％的Ni; 和基于质量的约0.01％至约0.50％的Mo。 C，Si，Mn，Cu，Ni，Mo和V组以及Ca，O和S组的组合满足特定关系，钢板的微结构由约95体积％以上的贝氏体铁素体 。

公开(公告)号：US07101445B2

公开(公告)日：2006-09-05

申请号：US10654775

申请日：2003-09-04

申请人： Chikara Kami ,  Akio Tosaka ,  Takuya Yamazaki

发明人： Chikara Kami ,  Akio Tosaka ,  Takuya Yamazaki

IPC分类号： C22C38/06 ,  C22C38/02 ,  C22C38/04

CPC分类号： C21D8/0436 ,  C21D1/185 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D8/0426 ,  C21D8/0473 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  Y10T428/12493 ,  Y10T428/12799

摘要： An object of the present invention is to provide a cold-rolled steel sheet and an alloyed hot-dip galvanized steel sheet in which tensile strength is effectively increased by press forming and heat treatment while maintaining excellent deep drawability in press forming. Specifically, a steel composition contains less than 0.01% of C, 0.005 to 1.0% of Si, 0.01 to 1.0% of Mn, 0.005 to 0.050% of Nb, 0.005 to 0.030% of Al, 0.005 to 0.040% of N, 0.0005 to 0.0015% of B, 0.05% or less of P, and 0.01% or less of S, the balance substantially composed of Fe, in which the following equations (1) and (2) are satisfied: N %≧0.0015+14/93·Nb %+14/27·Al %+14/11·B %  (1) C %≦(12/93)·Nb %.  (2)

摘要翻译： 本发明的目的是提供一种冷压钢板和合金化的热浸镀锌钢板，其中通过冲压成形和热处理有效地提高了拉伸强度，同时保持了冲压成形时的优异的深冲性。 具体地说，钢组成包含C：0.01％以下，Si：0.005〜1.0％，Mn：0.01〜1.0％，Nb：0.005〜0.050％，Al：0.005〜0.030％，N：0.005〜0.040％ 0.0015％的B，0.05％以下的P和0.01％以下的S，余量基本上由Fe组成，其中满足以下等式（1）和（2）：<？在线公式描述 =“在线公式”end =“lead”？> N％> = 0.0015 + 14 / 93.Nb％+ 14 / 27.Al％+ 14 / 11.B％（1）<？ description =“In-line Formulas”end =“tail”？> <？in-line-formula description =“In-line Formulas”end =“lead”？> C％<=（12/93）.Nb％。 （2）<？in-line-formula description =“In-line Formulas”end =“tail”？>

公开(公告)号：US07067023B2

公开(公告)日：2006-06-27

申请号：US10655361

申请日：2003-09-04

申请人： Chikara Kami ,  Akio Tosaka ,  Takuya Yamazaki

发明人： Chikara Kami ,  Akio Tosaka ,  Takuya Yamazaki

IPC分类号： C21D8/02

CPC分类号： C21D8/0436 ,  C21D1/185 ,  C21D8/0226 ,  C21D8/0236 ,  C21D8/0273 ,  C21D8/0426 ,  C21D8/0473 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  Y10T428/12493 ,  Y10T428/12799

摘要： An object of the present invention is to provide a cold-rolled steel sheet and an alloyed hot-dip galvanized steel sheet in which tensile strength is effectively increased by press forming and heat treatment while maintaining excellent deep drawability in press forming. Specifically, a steel composition contains less than 0.01% of C, 0.005 to 1.0% of Si, 0.01 to 1.0% of Mn, 0.005 to 0.050% of Nb, 0.005 to 0.030% of Al, 0.005 to 0.040% of N, 0.0005 to 0.0015% of B, 0.05% or less of P, and 0.01% or less of S, the balance substantially composed of Fe, in which the following equations (1) and (2) are satisfied: N%≧0.0015+14/93.Nb%+14/27.Al%+14/11.B%  (1) C%≧(12/93).Nb%  (2)

摘要翻译： 本发明的目的是提供一种冷压钢板和合金化的热浸镀锌钢板，其中通过冲压成形和热处理有效地提高了拉伸强度，同时保持了冲压成形时的优异的深冲性。 具体地说，钢组成包含C：0.01％以下，Si：0.005〜1.0％，Mn：0.01〜1.0％，Nb：0.005〜0.050％，Al：0.005〜0.030％，N：0.005〜0.040％ 0.0015％的B，0.05％以下的P和0.01％以下的S，余量基本上由Fe组成，其中满足以下等式（1）和（2）：<？在线公式描述 =“在线公式”end =“lead”？> N％> = 0.0015 + 14 / 93.Nb％+ 14 / 27.Al％+ 14 / 11.B％（1）<？ 描述=“内联公式”end =“tail”？> <？in-line-formula description =“In-line formula”end =“lead”？> C％> =（12/93）.Nb％ 2）<？in-line-formula description =“In-line Formulas”end =“tail”？>

公开(公告)号：US06902632B2

公开(公告)日：2005-06-07

申请号：US10341166

申请日：2003-01-13

申请人： Chikara Kami ,  Akio Tosaka ,  Kazunori Osawa ,  Shinjiro Kaneko ,  Takuya Yamazaki ,  Kaneharu Okuda ,  Takashi Ishikawa

发明人： Chikara Kami ,  Akio Tosaka ,  Kazunori Osawa ,  Shinjiro Kaneko ,  Takuya Yamazaki ,  Kaneharu Okuda ,  Takashi Ishikawa

IPC分类号： C21D8/02 ,  C21D9/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/22 ,  C22C38/38

CPC分类号： C21D8/0236 ,  C21D8/0226 ,  C21D8/0268 ,  C21D8/0273 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/22 ,  C22C38/38

摘要： The present invention presents a high tensile strength cold rolled steel sheet having excellent formability, impact resistance and strain age hardening characteristics, and the production thereof. As a specific means, a slab having a composition which contains, by mass %, 0.15% or less of C, 0.02% or less of Al, and 0.0050 to 0.0250% of N at N/Al of 0.3 or higher, and has N in a solid solution state at 0.0010% or more, is first hot rolled at the finish rolling delivery-side temperature of 800° C. or above, and is subsequently coiled at the coiling temperature of 750° C. or below to prepare a hot rolled plate. Then, after cold rolling, the hot rolled plate is continuously cooled at a temperature from the recrystallization temperature to 900° C. at a holding time of 10 to 120 seconds, and is cooled by primary cooling in which the hot rolled plate is cooled to 500° C. or below at a cooling rate of 10 to 300° C./s, and furthermore if necessary, by secondary cooling in which a residence time is 300 seconds or less in a temperature range of the primary cooling stopping temperature or below and 350° C. or higher. Provided is a steel sheet containing a ferritic phase having an average crystal grain size of 10 μm or less at an area ratio of 50% or more, and if necessary, a martensitic phase at an area ratio of 3% or more as a second phase.

摘要翻译： 本发明提供一种成型性，耐冲击性和应变时效硬化特性优异的高拉伸强度的冷轧钢板及其制造方法。 作为具体的方法，具有以质量％计含有0.15％以下C，0.02％以下Al，N / Al为0.0050〜0.0250％N，0.3以上N组成的板坯， 在0.0010％以上的固溶状态下，首先在800℃以上的精轧条件下进行热轧，然后在卷取温度为750℃以下的条件下卷取，制成热 轧板。 然后，冷轧后，在10〜120秒的保持时间内，从再结晶温度至900℃的温度下连续冷却热轧板，通过一次冷却冷却，将热轧板冷却至 500℃以下，冷却速度为10〜300℃/秒，另外如果需要，通过在一次冷却停止温度以下的温度范围内停留时间为300秒以下的二次冷却 和350℃以上。 本发明提供一种钢板，其含有平均结晶粒径为10μm以下的面积比为50％以上的铁素体相，根据需要，作为第二相的面积比为3％以上的马氏体相 。

公开(公告)号：US08784577B2

公开(公告)日：2014-07-22

申请号：US13146747

申请日：2010-01-29

申请人： Chikara Kami ,  Hiroshi Nakata ,  Kinya Nakagawa

发明人： Chikara Kami ,  Hiroshi Nakata ,  Kinya Nakagawa

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14 ,  C21D8/02

CPC分类号： C22C38/58 ,  B21B3/00 ,  C21D8/0205 ,  C21D8/0263 ,  C21D8/105 ,  C21D9/46 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50

摘要： A high-tensile-strength hot-rolled steel sheet is provided having a composition which contains 0.02 to 0.08% C, 0.01 to 0.10% Nb, 0.001 to 0.05% Ti and Fe and unavoidable impurities as a balance, wherein the steel sheet contains C, Ti and Nb in such a manner that (Ti+(Nb/2))/C

摘要翻译： 本发明提供一种组成为含有0.02〜0.08％C，0.01〜0.10％Nb，0.001〜0.05％Ti，Fe和余量的不可避免的杂质的高强度热轧钢板，其中钢板含有C ，Ti和Nb以满足（Ti +（Nb / 2））/ C <4的方式，并且钢板具有这样的结构，其中在距离片材表面1mm的位置处的结构的主相 厚度方向选自铁素体相，回火马氏体和铁素体相和回火马氏体的混合组织中的一种，板厚中心位置处的结构的主相由铁素体相形成，差异 在板厚方向上距离表面1mm处的第二相的结构部分（体积％）和板厚中心位置处的二次相的结构分数（体积％）之间的差为2％ 或更少。

公开(公告)号：US20120018056A1

公开(公告)日：2012-01-26

申请号：US13146751

申请日：2010-01-29

申请人： Kinya Nakagawa ,  Chikara Kami

发明人： Kinya Nakagawa ,  Chikara Kami

IPC分类号： C21D8/02 ,  C21D11/00 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/08 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58 ,  C22C38/02

CPC分类号： C21D9/46 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/105 ,  C21D2211/002 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

摘要： A thick-walled high-strength hot rolled steel sheet having excellent hydrogen induced cracking resistance which is preferably used as a raw material for a high-strength welded steel pipe of X65 grade or more and a method of manufacturing the thick-walled high-strength hot rolled steel sheet are provided. The composition of the thick-walled high-strength hot rolled steel sheet contains by mass % 0.02 to 0.08% C, 0.50 to 1.85% Mn, 0.03 to 0.10% Nb, 0.001 to 0.05% Ti, 0.0005% or less B in such a manner that (Ti+Nb/2)/C

摘要翻译： 优选用作X65级以上的高强度焊接钢管的原料的具有优异的氢诱发开裂性的厚壁高强度热轧钢板，以及制造厚壁高强度的方法 提供热轧钢板。 厚壁高强度热轧钢板的组成以这样的质量％计含有0.02〜0.08％的C，0.50〜1.85％的Mn，0.03〜0.10％的Nb，0.001〜0.05％的Ti，0.0005％以下的B 满足（Ti + Nb / 2）/ C <4的方式，或者还含有0.010％以下的Ca，0.02％以下的REM，Fe和不可避免的杂质作为平衡的一种或两种以上。 钢板具有由贝氏体相或贝氏体相组成的结构。 表维层硬度在维氏硬度方面为230HV以下。