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：US20050271496A1

公开(公告)日：2005-12-08

申请号：US10531386

申请日：2003-10-17

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： B21J1/04 ,  B21K1/46 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  F16B35/00 ,  F16B35/04

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：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：US20060260375A1

公开(公告)日：2006-11-23

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： B21B1/08

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

摘要： A method of rolling with a flattened-shaped caliber in a 1st pass and subsequently roiling with a square-shaped caliber in a 2nd pass In a caliber rolling of two or more continuous passes. The rolling is performed with a caliber which sets the ratio of the minor axis (2A01) of a 1st pass flattened to a material opposite side dimension (2A0) to A01/A0≦0.75 and the ratio of a 2nd pass vertical diagonal dimension 2As1 to the major axis 2B1 of a material after the 1st pass to As1/B1≦0.75 to introduce the large strain into the material. Thus, the effect of the distribution of strain introduced into the material in the 1st pass on the distribution of strain and the shape of the next pass is made clear so that the large strain can be introduced into the entire cross sectional are of the material, particularly at the center of the material.

摘要翻译： 在第一次通过中以扁平形口径滚动的方法，随后在第二次通过中以正方形口径滚动的方法在两次或更多次连续通过的口径滚动中。 轧制使用将第一道次的短轴（2A＆lt; 01＆gt;＆lt; 01＆gt;）与相对侧尺寸（2A＆lt; 0＆gt;）的材料的比例设定为A 第二通道垂直对角线尺寸2A 与主轴2B <1>之间的比<！ - SIPO 以将大的应变引入到材料中。 因此，第一次施加到材料中的应变分布对应变分布和下一次通过的形状的影响被清楚，使得可以将大的应变引入材料的整个横截面， 特别是在材料的中心。

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。

公开(公告)号：US08070888B2

公开(公告)日：2011-12-06

申请号：US11884948

申请日：2006-02-28

申请人： Shiro Torizuka ,  Eijrio Muramatsu ,  Kotobu Nagai

发明人： Shiro Torizuka ,  Eijrio Muramatsu ,  Kotobu Nagai

IPC分类号： C22C38/04

CPC分类号： B21K1/56 ,  B21K1/463 ,  F16B35/00 ,  F16B35/06

摘要： A wire rod or a steel wire of a bamboo nano-structure, whose mean grain diameter in a C-direction section is 200 nm or smaller, is prepared by applying a hot or warm working and additionally applying a cold working to a steel and next, by performing a forging, by a tool or a die such as cold pressure production, to a section, of a desired, limited site, other than a section parallel to an L-direction, an equiaxed nano-structure, whose mean grain diameter is 200 nm or smaller, is formed in this site. As a typical example of a formed article, there is enumerated a high strength micro screw in which a shaft outer diameter is 1.6 mm or smaller, a surface layer part of a head part recess has equiaxed nano-structure and a hardness Hv≧300, and a screw main body portion has bamboo nano-structure and a hardness Hv≧250.

摘要翻译： 通过施加热或热加工并且另外对钢进行冷加工并制备下面的方法来制备竹形纳米结构的线形或钢丝，其平均晶粒直径在200nm以下。 通过如冷压生产的工具或模具进行锻造，到除了与L方向平行的部分以外的期望的限定部位的截面，等轴的纳米结构，其平均粒径 在该位置形成200nm以下。 作为成形品的典型例子，列举了轴外径为1.6mm以下的高强度微型螺杆，头部凹部的表面层部分具有等轴的纳米结构，硬度Hv≥300， 螺杆主体部具有竹纳米结构，硬度Hv≥250。

公开(公告)号：US06287397B1

公开(公告)日：2001-09-11

申请号：US09386503

申请日：1999-08-31

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

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

IPC分类号： C21D800

CPC分类号： C21D8/00 ,  C21D7/13 ,  C22C38/002 ,  C22C38/04

摘要： A high strength phosphorus-containing steel having fine texture free from the problem of embrittlement by positively using the presence of P, which is a carbon steel having an average ferritic grain diameter of 3 &mgr;m or less and containing from 0.04 to 0.1% by mass of P, wherein the volume fraction of P segregated in the grain boundary accounts for 0.3 or less in case the grain boundary is covered by a P layer 1 nm in thickness.

摘要翻译： 通过积极地使用平均铁素体晶粒直径为3μm以下且含有0.04〜0.1质量％的碳素钢的P的存在，具有没有脆化问题的细微结构的高强度含磷钢 P，其中在晶界被厚度为1nm的P层覆盖的情况下，在晶界中分离的P的体积分数为0.3以下。

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。