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    Production method of ultra fine grain steel
    2.
    发明授权
    Production method of ultra fine grain steel 失效
    超细晶粒钢的生产方法

    公开(公告)号：US06464807B1

    公开(公告)日：2002-10-15

    申请号：US09512060

    申请日：2000-02-24

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

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

    IPC分类号： C21D800

    CPC分类号： C21D8/00 ,  C21D7/13 ,  C21D2201/00 ,  C21D2211/005

    摘要： A method of producing a ultra fine grain steel made of ferrite having a mean grain size of not larger that 3 &mgr;m as the base phase, after ingoting raw materials, by austenitizing the ingot by heating it to a temperature of at least an Ac 3 point, then, applying compression working of a reduction ratio of at least 50% at a temperature of from an Ae 3 point or lower to an Ar 3 point −150° C., or at a temperature of at least 550° C., and thereafter, cooling, wherein the strain rate as compression working is in the range of from 0.001 to 10/second.

    摘要翻译： 制造平均粒径不大于3μm的铁素体作为基础相的原料，通过将锭加热至至少Ac 3点的温度来进行奥氏体化的方法， 然后，在Ae 3点以下的温度至Ar 3点-150℃，或至少550℃的温度下进行压缩比为50％以上的压缩加工，以及 然后进行冷却，其中作为压缩加工的应变速率在0.001〜10 /秒的范围内。

    High strength formed article comprising hyperfine grain structure steel and manufacturing method of the same
    9.
    发明授权
    High strength formed article comprising hyperfine grain structure steel and manufacturing method of the same 有权
    包含超细晶粒结构钢的高强度成形制品及其制造方法

    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。

    Large strain introducing working method and caliber rolling device
    10.
    发明申请
    Large strain introducing working method and caliber rolling device 有权
    大应变引入工作方法和口径滚动装置

    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。