公开(公告)号：US20060054255A1

公开(公告)日：2006-03-16

申请号：US10541539

申请日：2004-05-20

申请人： Shiro Torizuka ,  Kotobu Nagai

发明人： Shiro Torizuka ,  Kotobu Nagai

IPC分类号： C21D8/00

CPC分类号： C21D8/0231 ,  B21B1/18 ,  C21D8/005 ,  C21D8/0431 ,  C21D8/06 ,  C21D9/0075

摘要： The invention presents a new warm control rolling method, in consideration of processing heat generation, as a method of stably manufacturing ultrafine crystal steel of 3 microns to 1 micron or less, without any limitation in pass interval or strain speed, being a rolling method of manufacturing steel mainly composed of fine ferrite particle texture with average ferrite grain size of 3 μm or less, in which, in the rolling process of one pass or more wherein the rolling temperature range is a temperature region of 350° C. to 800° C., the material temperature upon start of rolling of each rolling process does not exceed the maximum temperature of 800° C., and the material temperature during rolling and right after final rolling (within 1 second) is not lower than 350° C., temperature Tx-out right after rolling in each rolling process (within 1 second) is not higher than the temperature that is higher than rolling entry temperature Tx-in by 100° C. and the material temperature right after rolling (within 1 second) is not lower than the temperature that is lower than the temperature right before rolling by 100° C.

摘要翻译： 本发明提出了一种新的温控轧制方法，考虑到加工热产生，作为稳定地制造3微米至1微米或更小的超细晶体钢的方法，在通过间隔或应变速度方面没有任何限制，作为轧制方法 制造主要由铁素体微细组织细小的铁素体平均粒径为3μm以下的钢，其中，在一次以上的轧制过程中，轧制温度范围为350℃〜800℃的温度范围 每个轧制过程的轧制开始时的材料温度不超过800℃的最高温度，轧制后和最终轧制后（1秒钟内）的材料温度不低于350℃， 在各轧制过程中（1秒钟内）轧制之后的温度T×x-out不高于高于轧制进入温度T×x-in×100的温度 °C和伴侣 轧制后的温度（1秒内）不低于低于在轧制前100℃温度的温度。

公开(公告)号：US20100173716A1

公开(公告)日：2010-07-08

申请号：US12506418

申请日：2009-07-21

申请人： Shiro Torizuka ,  Kotobu Nagai ,  Eijiro Muramatsu ,  Yoshiyuki Suzuki

发明人： Shiro Torizuka ,  Kotobu Nagai ,  Eijiro Muramatsu ,  Yoshiyuki Suzuki

IPC分类号： B21H3/02 ,  C22C38/02 ,  C22C38/04

CPC分类号： C22C38/02 ,  B21K1/46 ,  C22C38/04

摘要： A formed product, characterized in that it is produced by using, as a material, a steel having an ultra fine structure comprising ferrite grains having an average grain diameter of 3 μm or less and by a method comprising only a forming step and including none of refining steps; and a method for producting the above formed product with ease. The formed product contains no alloying element and has been subjected to no refining step, and has been imparted with high strength and high toughness by the above ultra fine structure.

摘要翻译： 一种成形产品，其特征在于，通过使用具有包含平均粒径为3μm以下的铁素体晶粒的超微细结构的钢作为材料，并且仅通过包含成形步骤的方法不包括 精炼步骤; 以及容易地生产上述形成的产品的方法。 所形成的产品不含合金元素，并且不经过精炼步骤，并且通过上述超细结构赋予了高强度和高韧性。

公开(公告)号：US07647804B2

公开(公告)日：2010-01-19

申请号：US10557412

申请日：2004-05-20

申请人： Tadanobu Inoue ,  Shiro Torizuka ,  Eijiro Muramatsu ,  Kotobu Nagai

发明人： Tadanobu Inoue ,  Shiro Torizuka ,  Eijiro Muramatsu ,  Kotobu Nagai

IPC分类号： B21B13/00 ,  B21B13/10

CPC分类号： B21B27/024 ,  B21B1/16 ,  B21B1/18

摘要： A method of rolling a material in two more continuous passes is disclosed. The method includes rolling the material with a flattened-shaped caliber in a first pass, and subsequently rolling with a square-shaped caliber in a second pass. The rolling is performed with a first pass caliber having a flattened shape, wherein the ratio of the length (2A01) of minor axis of the first pass caliber to an initial width (2A0) is (A01/A0)≦0.75; and a second pass caliber, wherein the ratio of a diagonal dimension (2AS1) of the second pass caliber to the length (2B1) of the major axis of the material after the first pass is (AS1/B1)≦0.75 to introduce the large strain into the material.

摘要翻译： 公开了一种在两个连续通道中轧制材料的方法。 该方法包括在第一道次中以扁平形口径轧制材料，随后在第二道次中以方形口径滚压。 以具有扁平形状的第一道径进行轧制，其中第一道口径的短轴长度（2A01）与初始宽度（2A0）的比率为（A01 / A0）<= 0.75; 和第二通口径，其中第二通孔口的对角线尺寸（2AS1）与第一遍之后的材料的长轴的长度（2B1）的比率为（AS1 / B1）<= 0.75，以引入 大应变进入材料。

公开(公告)号：US20080210351A1

公开(公告)日：2008-09-04

申请号：US12078932

申请日：2008-04-08

申请人： Shiro TORIZUKA ,  Kotobu NAGAI ,  Eijiro MURAMATSU ,  Yoshiyuki SUZUKI

发明人： Shiro TORIZUKA ,  Kotobu NAGAI ,  Eijiro MURAMATSU ,  Yoshiyuki SUZUKI

IPC分类号： C21D9/00 ,  C22C38/02

CPC分类号： C22C38/02 ,  B21K1/46 ,  C22C38/04

摘要： A formed product, characterized in that it is produced by using, as a material, a steel having an ultra fine structure comprising ferrite grains having an average grain diameter of 3 μm or less and by a method comprising only a forming step and including none of refining steps; and a method for producting the above formed product with ease. The formed product contains no alloying element and has been subjected to no refining step, and has been imparted with high strength and high toughness by the above ultra fine structure.

摘要翻译： 一种成形产品，其特征在于，通过使用包含平均粒径为3μm以下的铁素体晶粒的超微细结构的钢作为材料，并且仅通过形成步骤的方法，不包括 精炼步骤; 以及容易地生产上述形成的产品的方法。 所形成的产品不含合金元素，并且不经过精炼步骤，并且通过上述超细结构赋予了高强度和高韧性。

公开(公告)号：US06572716B2

公开(公告)日：2003-06-03

申请号：US09157393

申请日：1998-09-21

申请人： Tohru Hayashi ,  Shiro Torizuka ,  Kaneaki Tsuzaki ,  Kotobu Nagai ,  Osamu Umezawa

发明人： Tohru Hayashi ,  Shiro Torizuka ,  Kaneaki Tsuzaki ,  Kotobu Nagai ,  Osamu Umezawa

IPC分类号： C21D700

CPC分类号： C21D8/0231 ,  C21D8/00 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04

摘要： A fine ferrite-based steel is disclosed, wherein at least 60% of the ferrite grain boundary is a large angle grain boundary of at least 15°, and the mean ferrite grain size is not more than 2.5 &mgr;m. The fine ferrite-based steel of the invention has a high strength and a long fatigue life.

摘要翻译： 公开了一种细铁素体钢，其中至少60％的铁素体晶界为大于15°的大角度晶界，平均铁素体晶粒尺寸不大于2.5μm。 本发明的细铁素体钢具有高强度和长的疲劳寿命。

公开(公告)号：US4933308A

公开(公告)日：1990-06-12

申请号：US369884

申请日：1989-06-22

申请人： Hiroaki Nishio ,  Shiro Torizuka

发明人： Hiroaki Nishio ,  Shiro Torizuka

IPC分类号： C04B35/58

CPC分类号： C04B35/58071 ,  C04B35/645

摘要： A ceramic sintered body comprising TiB.sub.2 as the principal component, 0.5 to 30 wt. % of SiC and 2 to 40 wt. % of ZrO.sub.2. In some cases ZrO.sub.2 includes stabilizers for tetragonal crystal, such as Y.sub.2 O.sub.3, MgO or CeO.sub.2. The sintered body has a dense structure where TiB.sub.2, ZrO.sub.2 and SiC uniformly disperse. ZrO.sub.2 is located at the grain boundary of TiB.sub.2, and inhibits the grain growth of TiB.sub.2 as well as improves the strength of the sintered body by binding it to TiB.sub.2 strongly. SiC is located not only at the grain boundary but also on the inside of both grains. Since the contract of SiC during cooling process of the sintered body is less than TiB.sub.2 and ZrO.sub.2, compressive stress is produced in SiC and around thereof. The sintered body is remarkably strengthened by the residual compressive stress, and simultaneously, the high fracture toughness is also achieved.

公开(公告)号：US20110083775A1

公开(公告)日：2011-04-14

申请号：US12968617

申请日：2010-12-15

申请人： Hiroshi Nakajima ,  Shiro Torizuka ,  Kaneaki Tsuzaki ,  Kotobu Nagai

发明人： Hiroshi Nakajima ,  Shiro Torizuka ,  Kaneaki Tsuzaki ,  Kotobu Nagai

IPC分类号： C22C38/00 ,  C21D8/02

CPC分类号： C21D8/00 ,  B22F2998/00 ,  C21D8/06 ,  C22C1/1094 ,  C22C32/0026 ,  C22C38/04 ,  C22C1/1036

摘要： A tough high strength heavy wall steel material having superior weldability is provided, said steel material has a diameter or a side 5 mm or more in length, and comprises oxides 1 μm or less in particle diameter homogeneously dispersed at a dispersion density in a range of from 10,000 to 100,000 particles/mm2 and uniform ferrite grains 2 μm or less in grain diameter formed over the entire plane making a right angle with respect to the rolling direction.

摘要翻译： 提供具有优良焊接性的坚韧的高强度重壁钢材料，所述钢材具有长度为5mm以上的直径或侧面，并且包括以分散密度均匀分散的1μm以下的氧化物，其分散密度范围为 10,000〜100,000个/ mm 2，在整个平面上形成的晶粒直径为2μm以下的均匀的铁素体相对于轧制方向成直角。

公开(公告)号：US20100051144A1

公开(公告)日：2010-03-04

申请号：US12556420

申请日：2009-09-09

申请人： Shiro Torizuka ,  Eijiro Muramatsu ,  Kotobu Nagai

发明人： Shiro Torizuka ,  Eijiro Muramatsu ,  Kotobu Nagai

IPC分类号： C21D9/52 ,  C22C38/00

CPC分类号： C21D9/0093 ,  C21D7/02 ,  C21D8/06 ,  C21D2211/005 ,  C22C38/04

摘要： There are provided an excellent cold-workability exhibiting high-strength steel wire or steel bar, or high-strength shaped article and a process for producing them. In particular, there is provided a process comprising carrying out hot working at 350 to 800° C. of a steel ingot, cast slab, steel slab or steel semifinished product having a C content of not greater than the solid solution limit of carbon of ferrite phase at Ae1 point and not greater than 0.010 mass % and being free of any cementite, or having a C content of >0.01 to 0.45 mass % to thereby obtain a material whose average crystal grain diameter in a cross section perpendicular to the longitudinal direction is ≦3 μm, and thereafter carrying out cold working of the material to thereby attain formation of a ferrite structure whose average crystal grain diameter in a cross section perpendicular to the longitudinal direction is ≦500 nm.

摘要翻译： 提供了表现出高强度钢线或钢棒或高强度成形制品的优异的冷加工性及其制造方法。 具体地说，提供了一种方法，该方法包括在350至800℃的温度下进行C含量不大于铁素体的碳固溶极限的钢锭，铸坯，钢坯或钢半成品 相位为Ae1点且不大于0.010质量％，并且不含任何渗碳体，或C含量大于0.01至0.45质量％，从而获得与纵向垂直的截面中的平均晶粒直径为 ＆nlE;3μm，然后对材料进行冷加工，从而形成与纵向垂直的截面中的平均晶粒直径为500nm的铁素体结构。

公开(公告)号：US20080041503A1

公开(公告)日：2008-02-21

申请号：US11547972

申请日：2005-04-11

申请人： Shiro Torizuka ,  Eijiro Muramatsu ,  Kotobu Nagai

发明人： Shiro Torizuka ,  Eijiro Muramatsu ,  Kotobu Nagai

IPC分类号： C21D7/02 ,  C21D9/52 ,  C22C38/00

CPC分类号： C21D9/0093 ,  C21D7/02 ,  C21D8/06 ,  C21D2211/005 ,  C22C38/04

摘要： There are provided an excellent cold-workability exhibiting high-strength steel wire or steel bar, or high-strength shaped article and a process for producing them. In particular, there is provided a process comprising carrying out hot working at 350 to 800° C. of a steel ingot, cast slab, steel slab or steel semifinished product having a C content of not greater than the solid solution limit of carbon of ferrite phase at Ael point and not greater than 0.010 mass % and being free of any cementite, or having a C content of >0.01 to 0.45 mass % to thereby obtain a material whose average crystal grain diameter in a cross section perpendicular to the longitudinal direction is ≦3 μm, and thereafter carrying out cold working of the material to thereby attain formation of a ferrite structure whose average crystal grain diameter in a cross section perpendicular to the longitudinal direction is ≦500 nm.

摘要翻译： 提供了表现出高强度钢线或钢棒或高强度成形制品的优异的冷加工性及其制造方法。 具体地说，提供了一种方法，该方法包括在350至800℃的温度下进行C含量不大于铁素体的碳固溶极限的钢锭，铸坯，钢坯或钢半成品 相，并且不大于0.010质量％，并且不含任何渗碳体，或者C含量为> 0.01至0.45质量％，从而获得与纵向方向垂直的截面中的平均晶粒直径为 <3μm，然后对材料进行冷加工，从而形成与纵向垂直的截面中的平均晶粒直径<= 500nm的铁素体结构。

公开(公告)号：US20060191613A1

公开(公告)日：2006-08-31

申请号：US10557416

申请日：2004-05-20

申请人： Shiro Torizuka ,  Eijiro Muramatsu ,  Tadanobu Inoue ,  Kotobu Nagai

发明人： Shiro Torizuka ,  Eijiro Muramatsu ,  Tadanobu Inoue ,  Kotobu Nagai

IPC分类号： C21D8/00

CPC分类号： B21B1/18 ,  C21D8/005 ,  C21D8/0231 ,  C21D8/06

摘要： A multi-directional warm-rolling method for manufacturing an ultrafine grain steel material with an ultrafine grain structure of 3 μm or smaller in average grain size. When roiling of two passes or more is performed for a steel material in the rolling temperature range of 350 to 800° C., a rolling by an oval shape caliber and a rolling by the other shape caliber an performed at leas one time so that a large amount of strain can be introduced into the material by a simple means with less section reduction ratio and less number of passes. Steel materials having the ultrafine grain structure and excellent strength and ductility can be manufactured by this method.

摘要翻译： 一种用于制造平均晶粒尺寸为3μm以下的超细晶粒结构的超细晶粒钢材料的多向温轧方法。 在350〜800℃的轧制温度范围内对钢材进行两次以上的轧制，通过椭圆形口径的轧制和通过另一形状口径的轧制a进行一次，使得 可以通过简单的方法将较大量的应变引入到材料中，具有较少的截面减小率和较少的通过次数。 可以通过该方法制造具有超细晶粒结构和优异的强度和延展性的钢材。