公开(公告)号：US07887649B2

公开(公告)日：2011-02-15

申请号：US12307439

申请日：2007-06-19

申请人： Shunsuke Toyoda ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Koji Suzuki ,  Kei Sakata ,  Makio Gunji ,  Akio Sato ,  Tetsuro Sawaki

发明人： Shunsuke Toyoda ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Koji Suzuki ,  Kei Sakata ,  Makio Gunji ,  Akio Sato ,  Tetsuro Sawaki

IPC分类号： C21D9/08 ,  C22C38/00 ,  C21D8/02

CPC分类号： B21C37/08 ,  C21D1/26 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/08 ,  C21D2211/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

摘要： A high-tensile strength welded steel tube has excellent formability and torsional fatigue endurance after being formed into cross-sectional shape and then stress-relief annealed. A steel material used has a composition which contains C, Si, Al, 1.01% to 1.99% Mn, 0.041% to 0.150% Ti, 0.017% to 0.150% Nb, P, S, N, and O such that the sum of the content of Ti and that of Nb is 0.08% or more, the content of each of C, Si, and Al being within an appropriate range, the content of each of P, S, N, and O being adjusted to a predetermined value or less.

摘要翻译： 高强度焊接钢管在成形为截面形状后进行抗应力退火退火，具有优异的成型性和抗扭疲劳耐久性。 使用的钢材具有含有C，Si，Al，1.01〜1.99％的Mn，0.041〜0.150％的Ti，0.017〜0.150％的Nb，P，S，N和O的成分， Ti和Nb的含量为0.08％以上，C，Si和Al中的每一种的含量在适当范围内，P，S，N和O中的每一个的含量被调节至预定值，或 减。

公开(公告)号：US20090277544A1

公开(公告)日：2009-11-12

申请号：US12307439

申请日：2007-06-19

申请人： Shunsuke Toyoda ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Koji Suzuki ,  Kei Sakata ,  Makio Gunji ,  Akio Sato ,  Tetsuro Sawaki

发明人： Shunsuke Toyoda ,  Masatoshi Aratani ,  Yoshikazu Kawabata ,  Yuji Hashimoto ,  Koji Suzuki ,  Kei Sakata ,  Makio Gunji ,  Akio Sato ,  Tetsuro Sawaki

IPC分类号： C21D9/08 ,  C22C38/02 ,  C22C38/26

CPC分类号： B21C37/08 ,  C21D1/26 ,  C21D8/02 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/08 ,  C21D2211/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

摘要： A high-tensile strength welded steel tube has excellent formability and torsional fatigue endurance after being formed into cross-sectional shape and then stress-relief annealed. A steel material used has a composition which contains C, Si, Al, 1.01% to 1.99% Mn, 0.041% to 0.150% Ti, 0.017% to 0.150% Nb, P, S, N, and O such that the sum of the content of Ti and that of Nb is 0.08% or more, the content of each of C, Si, and Al being within an appropriate range, the content of each of P, S, N, and O being adjusted to a predetermined value or less.

摘要翻译： 高强度焊接钢管在成形为截面形状后进行抗应力退火退火，具有优异的成型性和抗扭疲劳耐久性。 使用的钢材具有含有C，Si，Al，1.01〜1.99％的Mn，0.041〜0.150％的Ti，0.017〜0.150％的Nb，P，S，N，和O的组成， Ti和Nb的含量为0.08％以上，C，Si和Al中的每一种的含量在适当范围内，P，S，N和O中的每一个的含量被调节至预定值，或 减。

公开(公告)号：US08747578B2

公开(公告)日：2014-06-10

申请号：US10582717

申请日：2004-12-09

申请人： Shunsuke Toyoda ,  Kei Sakata ,  Akio Sato ,  Kouichi Kaneko ,  Hiroshi Kawaguchi

发明人： Shunsuke Toyoda ,  Kei Sakata ,  Akio Sato ,  Kouichi Kaneko ,  Hiroshi Kawaguchi

IPC分类号： C22C38/44

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D8/10 ,  C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

摘要： A steel having excellent formability, fatigue endurance after quenching, low temperature toughness, resistance for hydrogen embrittlement, and corrosion fatigue endurance. A method includes heating a steel slab at 1160° C. to 1320° C., hot-finish-rolling the steel slab at a finisher delivery temperature of 750° C. to 980° C., and then coiling the hot-rolled steel at a coiling temperature of 560° C. to 740° C. after slow cooling for a time of 2 seconds or more to produce a hot-rolled steel strip having a structure in which the ferrite grain diameter df corresponding to a circle is 1.1 μm to less than 1.2 μm and the ferrite volume fraction Vf is 30% to 98%, the steel slab containing 0.18 to 0.29% of C, 0.06 to 0.45% of Si, 0.91 to 1.85% of Mn, 0.019% or less of P, 0.0029% or less of S, 0.015 to 0.075% of sol. Al, 0.0049% or less of N, 0.0049% or less of O, 0.0001 to 0.0029% of B, 0.001 to 0.019% of Nb, 0.001 to 0.029% of Ti, 0.001 to 0.195% of Cr, and 0.001 to 0.195% of Mo so that the carbon equivalent Ceq satisfies a value of 0.4 to less than 0.58, and the total x of multiplying factors including that for B according to Grossmann satisfies a value of 1.2 to less than 1.7.

摘要翻译： 具有优异的成形性，淬火后疲劳耐久性，低温韧性，耐氢脆性和耐腐蚀疲劳耐久性的钢。 一种方法包括将钢坯在1160℃加热至1320℃，在750℃至980℃的整理器输送温度下对钢坯进行热精轧，然后卷取热轧钢 在缓慢冷却2秒钟以上的卷取温度为560℃〜740℃的条件下，制造出具有如下结构的热轧钢带，其中，相当于圆的铁素体晶粒直径df为1.1μm 小于1.2μm，铁素体体积分率Vf为30〜98％，含有0.18〜0.29％的C，0.06〜0.45％的Si，0.91〜1.85％的Mn，0.019％以下的P， 0.0029％以下的S，0.015〜0.075％的溶胶。 Al：0.0049％以下，○0.0049％以下，B：0.0001〜0.0029％，Nb：0.001〜0.019％，Ti：0.001〜0.029％，Cr：0.001〜0.195％，以及0.001〜0.195％ Mo使得碳当量Ceq满足0.4至小于0.58的值，并且包括根据Grossmann的乘积因子的总和x满足1.2至小于1.7的值。

公开(公告)号：US20070144632A1

公开(公告)日：2007-06-28

申请号：US10582717

申请日：2004-12-09

申请人： Shunsuke Toyoda ,  Kei Sakata ,  Akio Sato ,  Koichi Kaneko ,  Hiroshi Kawaguchi

发明人： Shunsuke Toyoda ,  Kei Sakata ,  Akio Sato ,  Koichi Kaneko ,  Hiroshi Kawaguchi

IPC分类号： C22C38/32

CPC分类号： C22C38/02 ,  C21D8/0226 ,  C21D8/10 ,  C22C38/001 ,  C22C38/002 ,  C22C38/04 ,  C22C38/22 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38

摘要： A steel having excellent formability, fatigue endurance after quenching, low temperature toughness, resistance for hydrogen embrittlement, and corrosion fatigue endurance. A method includes heating a steel slab at 1160° C. to 1320° C., hot-finish-rolling the steel slab at a finisher delivery temperature of 750° C. to 980° C., and then coiling the hot-rolled steel at a coiling temperature of 560° C. to 740° C. after slow cooling for a time of 2 seconds or more to produce a hot-rolled steel strip having a structure in which the ferrite grain diameter df corresponding to a circle is 1.1 μm to less than 1.2 μm and the ferrite volume fraction Vf is 30% to 98%, the steel slab containing 0.18 to 0.29% of C, 0.06 to 0.45% of Si, 0.91 to 1.85% of Mn, 0.019% or less of P, 0.0029% or less of S, 0.015 to 0.075% of sol. Al, 0.0049% or less of N, 0.0049% or less of O, 0.0001 to 0.0029% of B, 0.001 to 0.019% of Nb, 0.001 to 0.029% of Ti, 0.001 to 0.195% of Cr, and 0.001 to 0.195% of Mo so that the carbon equivalent Ceq satisfies a value of 0.4 to less than 0.58, and the total x of multiplying factors including that for B according to Grossmann satisfies a value of 1.2 to less than 1.7.

摘要翻译： 具有优异的成形性，淬火后疲劳耐久性，低温韧性，耐氢脆性和耐腐蚀疲劳耐久性的钢。 一种方法包括将钢坯在1160℃加热至1320℃，在750℃至980℃的整理器输送温度下对钢坯进行热精轧，然后卷取热轧钢 在缓慢冷却2秒钟以上的卷取温度为560℃〜740℃的条件下，制造出具有如下结构的热轧带钢，其中铁素体晶粒直径df对应于圆形为1.1μm 小于1.2μm，铁素体体积分率Vf为30％〜98％，钢坯含有0.18〜0.29％的C，0.06〜0.45％的Si，0.91〜1.85％的Mn，0.019％以下的P， 0.0029％以下的S，0.015〜0.075％的溶胶。 Al：0.0049％以下，○0.0049％以下，B：0.0001〜0.0029％，Nb：0.001〜0.019％，Ti：0.001〜0.029％，Cr：0.001〜0.195％，以及0.001〜0.195％ Mo使得碳当量Ceq满足0.4至小于0.58的值，并且包括根据Grossmann的乘积因子的总和x满足1.2至小于1.7的值。

公开(公告)号：US06217680B1

公开(公告)日：2001-04-17

申请号：US09254871

申请日：1999-03-15

申请人： Yoshikazu Kawabata ,  Kaneharu Okuda ,  Kei Sakata ,  Takashi Obara ,  Atsushi Ogino

发明人： Yoshikazu Kawabata ,  Kaneharu Okuda ,  Kei Sakata ,  Takashi Obara ,  Atsushi Ogino

IPC分类号： C21D804

CPC分类号： C21D8/0436 ,  C21D8/0426 ,  C21D8/0463 ,  C21D8/0473 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/60

摘要： A steel slab having a composition that comprises at most 0.008% by weight of C, at most 0.5% by weight of Si, at most 1.0% by weight of Mn, at most 0.15% by weight of P, at most 0.02% by weight of S, from 0.01 to 0.10% by weight of Al, at most 0.008% by weight of N, from 0.035 to 0.20% by weight of Ti, and from 0.001 to 0.015% by weight of Nb, with a balance of Fe and inevitable impurities, in which those C, S, N, Ti and Nb satisfy the following condition: 1.2(C/12+N/14+S/32)

摘要翻译： 一种钢坯，其组成为：至多0.008重量％的C，至多0.5重量％的Si，至多1.0重量％的Mn，至多0.15重量％的P，至多0.02重量％ 的S，0.01〜0.10重量％的Al，至多0.008重量％的N，0.035〜0.20重量％的Ti和0.001〜0.015重量％的Nb，余量为Fe和不可避免的 其中C，S，N，Ti和Nb满足以下条件的杂质：在钢的Ar 3相变点和Ar3相变点之间的温度下，进行粗热轧至不低于85％的压下率 950℃，然后在温度下降的温度下进行最终热轧至不低于65％的压下率。 600℃和Ar3相变点，同时被润滑，从而具有不大于0.06的平均剪切应变，然后酸洗，在700-920℃的温度下进行预退火， 轧制至不低于65％的还原率，然后在700-920℃的温度下进一步退火再结晶。

公开(公告)号：US07942984B2

公开(公告)日：2011-05-17

申请号：US11791503

申请日：2005-09-01

申请人： Yasuhide Ishiguro ,  Yoshikazu Kawabata ,  Kei Sakata ,  Masayuki Sakaguchi ,  Masayoshi Ishida ,  Motoaki Itadani ,  Yasue Koyama

发明人： Yasuhide Ishiguro ,  Yoshikazu Kawabata ,  Kei Sakata ,  Masayuki Sakaguchi ,  Masayoshi Ishida ,  Motoaki Itadani ,  Yasue Koyama

IPC分类号： H01F1/147

CPC分类号： C22C38/02 ,  C21D8/10 ,  C21D8/12 ,  C22C38/04 ,  C22C38/06 ,  H01F1/14766

摘要： A steel pipe blank having a composition containing 0.5% or less C and 85% or more Fe in terms of mass percent is heated, and stretch-reducing is then performed so that the diameter decrease ratio is 15% or more and the rolling finishing temperature is (the Ar3 transformation point−10)° C. or lower. Consequently, a structure in which the ratio of X-ray diffraction intensity obtained from the plane in which the direction of crystal grains is preferentially oriented parallel to the circumference direction and the direction of crystal grains is preferentially oriented parallel to the rolling direction of the steel pipe to that obtained for a three-dimensionally randomly oriented sample is 3.0 or more is formed, and the r-value is increased, thereby improving the magnetic properties of the steel pipe.

摘要翻译： 将具有以质量百分比计含量为0.5％以下且Fe为85％以上的Fe的组成的钢管坯加热，然后进行拉伸减少，使得直径减小率为15％以上，轧制终轧温度 是（Ar3转化点-10）℃或更低。 因此，从晶粒的<100>方向优选平行于圆周方向的平面和晶粒的<011>方向获得的X射线衍射强度的比优先取向为平行于 钢管的轧制方向与三维随机取向试样的轧制方向成为3.0以上，r值增加，从而提高钢管的磁特性。

公开(公告)号：US20100047609A1

公开(公告)日：2010-02-25

申请号：US12528551

申请日：2008-01-25

申请人： Yoshikazu Kawabata ,  Masayuki Sakaguchi ,  Kei Sakata

发明人： Yoshikazu Kawabata ,  Masayuki Sakaguchi ,  Kei Sakata

IPC分类号： B32B1/08 ,  B23K13/01

CPC分类号： B21C37/08 ,  B23K13/025 ,  B23K2101/06 ,  C21D8/10 ,  C21D9/50 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  Y10T428/1241

摘要： An electric resistance welded steel tube for heat treatment can be used as a highly durable material even after quenching treatment by rapid heating for hollow stabilizers or the like and a method for manufacturing such an electric resistance welded steel tube. A steel tube material, which has a composition constituted by, in mass percent, C: 0.15 to 0.40%, Si: 0.05 to 0.50%, Mn: 0.30 to 2.00%, Al: 0.01 to 0.10%, Ti: 0.001 to 0.04%, B: 0.0005 to 0.0050%, and N: 0.0010 to 0.0100% with Ti and N satisfying (N/14)

摘要翻译： 即使在通过中空稳定剂等的快速加热淬火处理之后，也可以使用用于热处理的电阻焊钢管作为高耐用材料，以及这种电阻焊钢管的制造方法。 1.一种钢管材料，其组成以质量％C：0.15〜0.40％，Si：0.05〜0.50％，Mn：0.30〜2.00％，Al：0.01〜0.10％，Ti：0.001〜0.04％ ，B：0.0005〜0.0050％，Ti：N：0.0010〜0.0100，满足（N / 14）<（Ti / 47.9）。

公开(公告)号：US20080011389A1

公开(公告)日：2008-01-17

申请号：US11791503

申请日：2005-09-01

申请人： Yasuhide Ishiguro ,  Yoshikazu Kawabata ,  Kei Sakata ,  Masayuki Sakaguchi ,  Motoaki Itadani ,  Yasue Koyama ,  Masayoshi Ishida

发明人： Yasuhide Ishiguro ,  Yoshikazu Kawabata ,  Kei Sakata ,  Masayuki Sakaguchi ,  Motoaki Itadani ,  Yasue Koyama ,  Masayoshi Ishida

IPC分类号： H01F1/00

CPC分类号： C22C38/02 ,  C21D8/10 ,  C21D8/12 ,  C22C38/04 ,  C22C38/06 ,  H01F1/14766

摘要： A steel pipe with good magnetic properties and a method of producing the same are proposed. Specific solutions are as follows. A steel pipe blank having a composition containing 0.5% or less C and 85% or more Fe in terms of mass percent is heated, and stretch-reducing is then performed so that the diameter decrease ratio is 15% or more and the rolling finishing temperature is (the Ar3 transformation point −10)° C. or lower. Consequently, a structure in which the ratio of X-ray diffraction intensity obtained from the plane in which the direction of crystal grains is preferentially oriented parallel to the circumference direction and the direction of crystal grains is preferentially oriented parallel to the rolling direction of the steel pipe to that obtained for a three-dimensionally randomly oriented sample is 3.0 or more is formed, and the r-value is increased, thereby improving the magnetic properties of the steel pipe. Furthermore, when annealing is performed at a temperature in the range of 550° C. to the Ac1 transformation point after the stretch-reducing, the crystal grain size is coarsened to further improve the magnetic properties. Cold drawing may be performed prior to the annealing. When a steel pipe having a high-purity composition containing less than 0.01% C and 95% or more Fe is used as the steel pipe blank, the magnetic properties are further improved. In order to further improve the magnetic properties, appropriate amounts of Si and Al are preferably contained. In addition, an appropriate content of Cr improves the magnetic properties in the high-frequency range.

摘要翻译： 提出了具有良好磁特性的钢管及其制造方法。 具体方案如下。 将具有以质量百分比计含量为0.5％以下且Fe为85％以上的Fe的组成的钢管坯加热，然后进行拉伸减少，使得直径减小率为15％以上，轧制终轧温度 是（Ar 3 3相变点-10）℃以下。 因此，从晶粒的<100>方向优选平行于圆周方向的平面和晶粒的<011>方向获得的X射线衍射强度的比优先取向为平行于 钢管的轧制方向与三维随机取向试样的轧制方向成为3.0以上，r值增加，从而提高钢管的磁特性。 此外，当在拉伸还原后，在550℃的温度下进行退火至Ac 1 H 2相变​​点时，晶粒尺寸粗大化，进一步提高磁特性。 冷拉拔可以在退火之前进行。 当使用含有小于0.01％C和95％以上Fe的高纯度组成的钢管作为钢管坯时，磁特性进一步提高。 为了进一步提高磁特性，优选含有适量的Si和Al。 另外，适当的Cr含量能够提高高频范围的磁特性。

公开(公告)号：US6103394A

公开(公告)日：2000-08-15

申请号：US029716

申请日：1998-03-03

申请人： Kaneharu Okuda ,  Yoshikazu Kawabata ,  Kei Sakata ,  Takaaki Hira ,  Atsushi Ogino ,  Takashi Obara

发明人： Kaneharu Okuda ,  Yoshikazu Kawabata ,  Kei Sakata ,  Takaaki Hira ,  Atsushi Ogino ,  Takashi Obara

IPC分类号： B21B3/00 ,  B21C1/00 ,  B21D22/20 ,  C21D8/04 ,  C21D9/00 ,  C21D9/48 ,  C22C38/00 ,  C22C38/60

CPC分类号： B21B3/00 ,  B21C1/00 ,  B21D22/20 ,  C21D8/04 ,  C21D9/00 ,  C21D9/48 ,  C22C38/00 ,  C22C38/60 ,  Y10T428/12229

摘要： A thin steel sheet having excellent rectangular drawability is produced by completing roughing rolling of steel containing C: 0.02 wt % or less, Si: 0.5 wt % or less, Mn: 1.0 wt % or less, P: 0.15 wt % or less, S: 0.02 wt % or less, Al: 0.01 to 0.10 wt %, N: 0.008 wt % or less, at least one of Ti: 0.001 to 0.20 wt % and Nb: 0.001 to 0.15 wt %, the balance comprising Fe, and inevitable impurities, in the temperature region of 950.degree. C. to the Ar.sub.3 transformation temperature: performing finish rolling at a reduction of over 70% under lubrication in the temperature region of the Ar.sub.3 transformation temperature to 500.degree. C.; pickling the sheet; annealing the resultant hot rolled sheet under conditions which satisfy the equations (1) and (2) below:(T+273) (20+log t).gtoreq.2.50.times.10.sup.4 (1)745.ltoreq.T.ltoreq.920 (2)wherein T: hot rolled sheet annealing temperature (.degree. C.)t: hot rolled sheet annealing time (sec); cold rolling at a reduction of 50 to 95%; and then recrystallization annealing; to satisfy the following relations:(r.sub.L +r.sub.C)/2-r.sub.D .gtoreq.0.67, and(r.sub.L +2r.sub.D +r.sub.C)/4.gtoreq.2.7,wherein r.sub.L : Lankford value in the rolling direction, r.sub.D : Lankford value in the direction at 45.degree. with the rolling direction, and r.sub.C : Lankford value in the direction perpendicular to the rolling direction.

摘要翻译： PCT No.PCT / JP97 / 04336 Sec。 371日期1998年3月3日 102（e）1998年3月3日PCT 1997年11月27日PCT PCT。 公开号WO98 / 28457 日期：1998年7月2日通过对C：0.02重量％以下，Si：0.5重量％以下，Mn：1.0重量％以下，P：0.15重量％以下的钢进行粗轧，制造具有优异的矩形拉伸性的薄钢板 ％以下，S：0.02重量％以下，Al：0.01〜0.10重量％，N：0.008重量％以下，Ti：0.001〜0.20重量％，Nb：0.001〜0.15重量％中的至少一种，余量 包括Fe和不可避免的杂质，在950℃至Ar3相变温度的范围内：在Ar3转变温度至500℃的温度区域内，在润滑下进行精制轧制70％以上。 酸洗板 （T + 273）（20 + log t）> / = 2.50×104（1）745 / = 0.67，（rL + 2rD + rC）/ 4> / = 2.7，其中rL：轧制方向的兰克福德值，rD：兰克福德值 方向为45°，轧制方向，rC：兰克福德值在垂直于轧制方向的方向。

公开(公告)号：US5542994A

公开(公告)日：1996-08-06

申请号：US363365

申请日：1994-12-23

申请人： Kazuhiro Seto ,  Kaneharu Okuda ,  Kei Sakata ,  Toshiyuki Kato ,  Takashi Ono

发明人： Kazuhiro Seto ,  Kaneharu Okuda ,  Kei Sakata ,  Toshiyuki Kato ,  Takashi Ono

IPC分类号： C21D1/18 ,  C21D1/26 ,  C21D8/04 ,  C21D9/46 ,  C21D9/48 ,  C22C38/00 ,  C22C38/16 ,  C21D8/02

CPC分类号： C21D9/48 ,  C21D8/0426 ,  C21D1/185 ,  C21D1/26 ,  C21D2211/00 ,  C21D2211/005 ,  C21D8/0473

摘要： A method of producing a high-formable, high-strength cold-rolled steel sheet from a steel slab comprising a steel with very low carbon content, one or both of Ti and Nb as a composition for forming a carbide or a nitride, and B in the range satisfying the following expression:0.001 A.ltoreq.B (wt %).ltoreq.0.003 Awherein A is a parameter determined approximately by the following expression with reference to the relation:A=P (wt %)+0.2 Mn (wt %)+0.8 Si (wt %)-0.2, subjecting the steel to a hot rolling so as to finish at a temperature between about Ar.sub.3 transformation temperature and about Ar.sub.3 transformation temperature +100 C.degree.. Thereafter, the steel is successively subjected to coiling, cold-rolling and, then, continuous annealing at temperatures between Ac.sub.1 transformation temperature +5 C.degree. and Ac.sub.1 transformation temperature +50 C.degree., and not lower than 860 C.degree.. Thus, a volume percentage of a low temperature transformation phase is controlled within the range of about 5 to about 50%, thereby obtaining a high strength cold-rolled steel sheet having a tensile strength of 38 kgf/mm.sup.2 or more, plus excellent formability and resistance to secondary working embrittlement.

摘要翻译： 作为用于形成碳化物或氮化物的组合物，由含有碳含量非常低的钢，Ti和Nb中的一种或两种的钢坯制造高成形性高强度冷轧钢板的方法，以及B 在满足以下表达式的范围内：0.001A