公开(公告)号：US20090277539A1

公开(公告)日：2009-11-12

申请号：US12085304

申请日：2006-11-21

申请人： Yuuji Kimura ,  Tadanobu Inoue ,  Kaneaki Tsuzaki ,  Kotobu Nagai

发明人： Yuuji Kimura ,  Tadanobu Inoue ,  Kaneaki Tsuzaki ,  Kotobu Nagai

IPC分类号： C21D11/00 ,  C21D8/02 ,  C21D8/06 ,  C22C38/00

CPC分类号： C21D9/46 ,  C21D8/0205 ,  C21D8/0231 ,  C21D8/0431 ,  C21D8/065 ,  C21D8/105 ,  C21D9/0075 ,  C21D9/0093 ,  C21D9/525 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18

摘要： There are provided a steel for warm working, to be subjected to warm working as various structures, components of cars, and the like, a warm working method thereof, and a steel material and a steel component obtainable from the warm working method.[Solving Means] A steel is to have a particle dispersion type fiber structure formed in the matrix by warm working. The steel is characterized in that the total amount of the dispersed second-phase particles at room temperature is 7×10−3 or more in terms of volume fraction, and the Vickers hardness (HV) is equal to or larger than the hardness H of the following equation (2): H=(5.2−1.2×10−4λ)×102  (2) when the steel is subjected to any of annealing, tempering, and aging treatments in the as-unworked state under conditions such that a parameter λ expressed by the following equation (1): λ=T(log t+20)(T; temperature(K), t; time(hr))  (1) is 1.4×104 or more in a prescribed temperature range of 350° C. or more and Ac1 point or less. This steel is taken as the steel for warm working.

摘要翻译： 提供一种用于温暖加工的钢，可以作为各种结构，汽车部件等进行温暖加工，其加热方法，以及可从该加热方法获得的钢材和钢部件。 [解决方案]钢是通过热加工形成在基质中的粒子分散型纤维结构体。 钢的特征在于，室温下分散的二相粒子的总量以体积分数计为7×10 -3以上，维氏硬度（HV）等于或大于下述的硬度H 等式（2）：H =（5.2-1.2×10-4λ）x102（2）当钢在非工作状态下进行任何退火，回火和老化处理时，条件是使得由 以下公式（1）：在350℃以上的规定温度范围内，λ= T（log t + 20）（T;温度（K），t;时间（hr））（1）为1.4×10 4以上 和Ac1点以下。 这种钢被作为温暖工作的钢。

公开(公告)号：US20090236015A1

公开(公告)日：2009-09-24

申请号：US12299407

申请日：2007-04-03

申请人： Hideyuki Sasaoka ,  Masamoto Ono ,  Eizaburou Nakanishi ,  Yoshio Okada ,  Tadanobu Inoue ,  Yuuji Kimura ,  Kotobu Nagai

发明人： Hideyuki Sasaoka ,  Masamoto Ono ,  Eizaburou Nakanishi ,  Yoshio Okada ,  Tadanobu Inoue ,  Yuuji Kimura ,  Kotobu Nagai

IPC分类号： C22C38/20 ,  C22C38/22 ,  C22C38/44

CPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/42 ,  C22C38/44

摘要： There is provided an ultrahigh strength steel sheet containing 0.10 to 0.40 mass % of C, 0.01 to 3.5 mass % of Cr, at least one selected from the group consisting of 0.10 to 2.0 mass % of Mo, 0.20 to 1.5 mass % of W, 0.002 to 1.0 mass % of V, 0.002 to 1.0 mass % of Ti and 0.005 to 1.0 mass % of Nb, 0.02 mass % or less of P and 0.01 mass % or less of S as impurities and the balance being Fe and unavoidable impurities based on the total mass of the steel sheet and having a base structure of lower bainite, a prior austenite grain size of 30 μm or smaller and a tensile strength of 980 MPa or higher. There is also provided an automotive strength part using the ultrahigh strength steel sheet.

摘要翻译： 提供一种超高强度钢板，其含有C：0.10〜0.40质量％，Cr：0.01〜3.5质量％，选自Mo：0.10〜2.0质量％，W：0.20〜1.5质量％ V：0.002〜1.0质量％，Ti：0.002〜1.0质量％，Nb：0.005〜1.0质量％，P：0.02质量％以下，S：0.01质量％以下，余量：Fe和不可避免的杂质 对于钢板的总质量，具有下贝氏体的基体结构，原奥氏体粒径为30μm以下，拉伸强度为980MPa以上。 还提供了使用超高强度钢板的汽车强度部件。

公开(公告)号：US20090185943A1

公开(公告)日：2009-07-23

申请号：US12300982

申请日：2007-04-12

申请人： Tadanobu Inoue ,  Yuuji Kimura ,  Kotobu Nagai

发明人： Tadanobu Inoue ,  Yuuji Kimura ,  Kotobu Nagai

IPC分类号： C22C38/00

CPC分类号： C21D9/46 ,  B21B3/00 ,  C22C38/44

摘要： In a steel plate having tensile strength of 1 GPa or more at the normal temperature, the steel plate is made, stress decrement (SD) after uniform elongation in the stress-strain diagram obtained by using a tabular specimen of which is not less than 1.8×102 MPa, yield ratio (YR) of which is preferably not lower than 0.7, further preferably not lower than 0.8, and matrix structure of which is composed of martensite or bainite, or mixture of martensite and bainite substantially without proeutectoid ferrite, whereby the tough-ductility is improved on a practically utilizable level, and the steel plate becomes possible to be supplied in large quantities by winding up into a coil.

摘要翻译： 在常温下的拉伸强度为1GPa以上的钢板中，通过使用不小于1.8的板状试样获得的应力 - 应变图中，制造钢板，均匀伸长后的应力减小（SD） x102MPa，屈服比（YR）优选为0.7以上，进一步优选为0.8以上，其基体结构由马氏体或贝氏体组成，或马氏体与贝氏体的混合物基本上不具有先共析铁素体，由此韧性 在可实际使用的水平上提高了导电性，并且通过卷绕成线圈可以大量地供给钢板。

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。

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。

公开(公告)号：US06332905B1

公开(公告)日：2001-12-25

申请号：US09647100

申请日：2000-12-04

申请人： Minoru Ootaguchi ,  Shuji Wanikawa ,  Yuji Muramatsu ,  Kaneaki Tsuzaki ,  Kotobu Nagai ,  Toru Hayashi

发明人： Minoru Ootaguchi ,  Shuji Wanikawa ,  Yuji Muramatsu ,  Kaneaki Tsuzaki ,  Kotobu Nagai ,  Toru Hayashi

IPC分类号： C22C3302

CPC分类号： B22F3/156 ,  B22F3/1208 ,  B22F3/18 ,  B22F3/20 ,  B22F2998/00 ,  B22F2998/10 ,  C22C33/02 ,  C22C33/0228 ,  B22F3/14 ,  B22F3/17 ,  B22F9/082

摘要： The invention according to the present application provides a high strength solidification body by solidifying a starting metallic powder of iron and the like by means of plastic working using hydrostatic pressing, which is, for instance, a high strength high toughness steel material and the like having a superfine texture comprising a crystalline texture consisting of grains 5 &mgr;m or less in average diameter, or preferably, 3 &mgr;m or less in average diameter. Furthermore, the present invention provides a steel material included in the high strength solidification body, which contains oxide grain 0.2 &mgr;m or less in diameter at a volume ratio of from 0.5 to 60%.

摘要翻译： 根据本申请的发明通过使用例如具有例如高强度高韧性钢材等的塑性加工固化铁等的起始金属粉末来提供高强度固化体，其具有 包括由平均直径为5μm或更小的颗粒或平均直径优选为3μm或更小的颗粒组成的结晶质地的超细纹理。 此外，本发明提供了包含在高强度凝固体中的钢材，其含有体积比为0.5〜60％的直径为0.2μm以下的氧化物粒径。

公开(公告)号：US06221178B1

公开(公告)日：2001-04-24

申请号：US09157394

申请日：1998-09-21

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

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

IPC分类号： C22C3800

CPC分类号： C21D8/00 ,  C21D7/13 ,  C21D2211/005 ,  C21D2211/009

摘要： The invention provides an ultra-fine grain steel comprising fine ferrite grains as oriented at random and surrounded by large angle grain boundaries. The steel comprises fine ferrite grains having a mean grain size of not larger and 3.0 &mgr;m and surrounded by large angle grain boundaries having an misorientation not smaller than 15°.

摘要翻译： 本发明提供一种超细晶粒钢，其包含随机取向且被大角度晶界包围的细小铁素体晶粒。 该钢包含平均粒径不大于3.0μm的微细铁素体晶粒，并且具有不大于15°的取向差的大角度晶界。

公开(公告)号：US20070119527A1

公开(公告)日：2007-05-31

申请号：US11698171

申请日：2007-01-26

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： C21D8/00

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： 提供具有优异的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氧化物1μm或更小的粒径范围 在整个平面上形成的颗粒直径为2μm或更小的相对于轧制方向成直角的均匀的铁素体颗粒/ 2mm 2和均匀的铁素体颗粒。

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。