公开(公告)号：US08613817B2

公开(公告)日：2013-12-24

申请号：US12225545

申请日：2007-03-23

申请人： Naoya Hirase ,  Tetsuya Nakanishi ,  Kazuhiro Shimoda ,  Hirokazu Okada ,  Tomio Yamakawa ,  Yasuyoshi Hidaka

发明人： Naoya Hirase ,  Tetsuya Nakanishi ,  Kazuhiro Shimoda ,  Hirokazu Okada ,  Tomio Yamakawa ,  Yasuyoshi Hidaka

IPC分类号： C21D9/08 ,  C21D9/00

CPC分类号： B21B23/00 ,  B21B19/04 ,  C21D1/70 ,  C21D1/74 ,  C21D9/08 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44

摘要： The present invention is to provide a method for producing duplex stainless steel seamless pipe in which a duplex stainless steel billet can be inhibited from generating an oxide scale on the surface thereof during heating and the generation of outer surface flaw can also be prevented. The billet is heated in the a heating furnace for 1.5 hours or more and 4.0 hours or less at a heating temperature of 1250° C. or more and 1320° C. or less while regulating the average concentration of sulfur dioxide (SO2) gas in the atmosphere within the furnace to 0.01 volume % or less.

摘要翻译： 本发明提供一种双相不锈钢无缝管的制造方法，其中可以抑制双相不锈钢坯料在加热时在其表面上产生氧化皮，并且还可以防止外表面缺陷的产生。 在1250℃以上1320℃以下的加热温度下，在加热炉中将钢坯加热1.5小时以上4.0小时以上，同时调节二氧化硫（SO2）气体的平均浓度 炉内气氛为0.01体积％以下。

公开(公告)号：US20100175450A1

公开(公告)日：2010-07-15

申请号：US12748744

申请日：2010-03-29

申请人： Kazuhiro Shimoda ,  Tomio Yamakawa ,  Koji Muramatsu ,  Yuji Inoue

发明人： Kazuhiro Shimoda ,  Tomio Yamakawa ,  Koji Muramatsu ,  Yuji Inoue

IPC分类号： B21B19/04 ,  B21D28/34

CPC分类号： B21B23/00 ,  B21B19/04 ,  B21J5/10

摘要： A hole 30 is formed in the center of the rear end face 20 of a round billet 10. The hole 30 has a predetermined depth from the rear end face 20 and a plurality of grooves 31 are provided in the side surface thereof. Each groove 31 extends in the depth direction of the hole 30. Piercing and rolling of the round billet 10 having the hole 30 is performed using a piercing mill having a plug. During piercing and rolling, the bottom surface of the hole 30 is broken through by the plug and a protrusion which is to be the starting point of burrs is formed, and the protrusion is absorbed by the groove 31 as the plug advances. Consequently, formation of burrs at the rear end of a hollow shell after piercing-rolling thereof can be suppressed.

摘要翻译： 在圆坯10的后端面20的中央形成有孔30.孔30具有从后端面20的预定深度，在其侧面设有多个槽31。 每个槽31在孔30的深度方向上延伸。具有孔30的圆坯10的穿孔和轧制使用具有塞子的穿孔机进行。 在穿刺和滚动期间，孔30的底表面被插塞断开，并且形成作为毛刺起点的突起，并且当插头前进时突起被凹槽31吸收。 因此，可以抑制在穿孔轧制之后在中空壳的后端形成毛刺。

公开(公告)号：US07739892B2

公开(公告)日：2010-06-22

申请号：US12453568

申请日：2009-05-15

申请人： Tomio Yamakawa ,  Kazuhiro Shimoda

发明人： Tomio Yamakawa ,  Kazuhiro Shimoda

IPC分类号： B21B19/04

CPC分类号： B21B19/04 ,  B21B25/00

摘要： Seamless pipes excellent in quality features with high productivity is made by a by carrying out piercing-rolling using a piercer provided with a pair of inclined rolls. The piercing-rolling is carried out under conditions such that the plug tip draft (TDFT) or the root of the product of the plug tip draft (TDFT) are controlled along with the number of billet revolutions (N), namely (TDFT×N)0.5. In addition, positions of the inclined rolls are controlled in connection with the gorge draft (GDFT) indicating the ratio of the roll gap (Rg) which is minimal in the gorge section between the inclined rolls to the billet outside diameter (Bd). The piercing-rolling is carried out using a plug having a particular shape.

摘要翻译： 通过使用设置有一对倾斜辊的穿孔机进行穿孔轧制，可以实现高生产率的质量特性优良的无缝管。 穿孔轧制在条件下进行，使得塞子末梢吃水深度（TDFT）或塞子末端吃水深度（TDFT）的产物根数与坯锭转数（N）一起被控制，即（TDFT×N ）0.5。 此外，倾斜辊的位置与峡谷吃水（GDFT）相关联地控制，表示倾斜辊之间的峡谷部分中的辊间隙（Rg）与坯料外径（Bd）之间的最小比例。 使用具有特定形状的塞子进行穿孔轧制。

公开(公告)号：US20100107714A1

公开(公告)日：2010-05-06

申请号：US12685869

申请日：2010-01-12

申请人： Tomio Yamakawa ,  Kazuhiro Shimoda

发明人： Tomio Yamakawa ,  Kazuhiro Shimoda

IPC分类号： B21B19/04 ,  B21B39/06

CPC分类号： B21B19/04 ,  B21B23/00 ,  B21B39/06 ,  B21B2261/08 ,  B21B2261/10

摘要： A pusher device 4 includes a cylinder device 30 and a pusher mandrel 34. The cylinder device 30 includes a cylinder shaft 32. The pusher mandrel 34 is attached to the tip end of the cylinder shaft 32. The tip end of the pusher mandrel 34 is abutted against the rear end of a billet 20. The cross sectional area Sp of the pusher mandrel 34 and the cross sectional area Sb of the billet 20 satisfy Expression (1). The length Lp of the pusher mandrel 34 and the cross sectional area Sp of the pusher mandrel 34 satisfy Expression (2). The moving distance Lc of the tip end of the cylinder shaft 32 during piercing and rolling and the outer diameter Dc of the cylinder shaft 32 satisfy Expression (3). Therefore, the pusher device 4 can restrain the wall thickness deviation of the tip end part of a produced hollow shell. 0.3≦Sp/Sb  (1) Lp/Sp≦1.2  (2) Lc/Dc≦45  (3)

摘要翻译： 推动装置4包括气缸装置30和推动心轴34.气缸装置30包括气缸轴32.推动心轴34附接到气缸轴32的末端。推动心轴34的尖端是 抵靠坯料20的后端。挤压心轴34的截面面积Sp和坯料20的横截面积Sb满足式（1）。 推动心轴34的长度Lp和推动心轴34的横截面面积Sp满足式（2）。 穿孔轧制时的圆筒轴32的前端的移动距离Lc和圆筒轴32的外径Dc满足式（3）。 因此，推动装置4能够抑制制造的中空壳的前端部的壁厚偏差。 0.3＆nlE; Sp / Sb（1）Lp / Sp＆nlE; 1.2（2）Lc / Dc＆nlE; 45（3）

公开(公告)号：US20090218014A1

公开(公告)日：2009-09-03

申请号：US12225545

申请日：2007-03-23

申请人： Naoya Hirase ,  Tetsuya Nakanishi ,  Kazuhiro Shimoda ,  Hirokazu Okada ,  Tomio Yamakawa ,  Yasuyoshi Hidaka

发明人： Naoya Hirase ,  Tetsuya Nakanishi ,  Kazuhiro Shimoda ,  Hirokazu Okada ,  Tomio Yamakawa ,  Yasuyoshi Hidaka

IPC分类号： C21D8/10

CPC分类号： B21B23/00 ,  B21B19/04 ,  C21D1/70 ,  C21D1/74 ,  C21D9/08 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/44

摘要： The present invention is to provide a method for producing duplex stainless steel seamless pipe in which a duplex stainless steel billet can be inhibited from generating an oxide scale on the surface thereof during heating and the generation of outer surface flaw can also be prevented. The billet is heated in the a heating furnace for 1.5 hours or more and 4.0 hours or less at a heating temperature of 1250° C. or more and 1320° C. or less while regulating the average concentration of sulfur dioxide (SO2) gas in the atmosphere within the furnace to 0.01 volume % or less.

摘要翻译： 本发明提供一种双相不锈钢无缝管的制造方法，其中可以抑制双相不锈钢坯料在加热时在其表面上产生氧化皮，并且还可以防止外表面缺陷的产生。 在1250℃以上1320℃以下的加热温度下，在加热炉中将钢坯加热1.5小时以上4.0小时以上，同时调节二氧化硫（SO2）气体的平均浓度 炉内气氛为0.01体积％以下。

公开(公告)号：US20080314109A1

公开(公告)日：2008-12-25

申请号：US12155657

申请日：2008-06-06

申请人： Kazuhiro Shimoda ,  Tomio Yamakawa

发明人： Kazuhiro Shimoda ,  Tomio Yamakawa

IPC分类号： B21B19/04

CPC分类号： B21B25/00 ,  B21B19/04

摘要： A plug has a tip end portion, a taper portion, and a middle portion. The surface of the tip end portion is a spherical surface whose radius of curvature is R1 and length is L1 that is shorter than R1. The outer diameter of the taper portion on the front end side is D1, and the outer diameter on the back end side is D2 that is larger than D1, and the length is L2. The plug satisfies Expression (1), Expression (2) if 0

摘要翻译： 插头具有尖端部分，锥形部分和中间部分。 前端部的表面是曲率半径为R1，长度为L1的比R1短的球面。 前端侧的锥形部的外径为D1，后端侧的外径为D2，D1的长度为L2。 如果0 0.5D1 <？in-line-formula description =“In-line Formulas”end =“lead”？> 1.0 ？in-line-formula description =“In-line Formulas”end =“tail”？>

公开(公告)号：US20070181225A1

公开(公告)日：2007-08-09

申请号：US11643824

申请日：2006-12-22

申请人： Masaaki Igarashi ,  Kazuhiro Shimoda ,  Tomio Yamakawa ,  Hisashi Amaya

发明人： Masaaki Igarashi ,  Kazuhiro Shimoda ,  Tomio Yamakawa ,  Hisashi Amaya

IPC分类号： C22C19/05

CPC分类号： B21B19/04 ,  B21B23/00 ,  C22C19/053 ,  C22C19/055 ,  C22C19/056 ,  C22F1/10

摘要： A Ni base alloy pipe stock having a chemical composition comprising, by mass %, C≦0.04%, Si≦0.50%, Mn: 0.01 to 6.0%, P≦0.03%, S≦0.01%, Cr: 15 to 30%, Ni: more than 45% to not more than 60%, Mo: 0 to 18%, W: 0 to 36%, with Mo(%)+0.5W(%): more than 1.5% to not more than 18%, Cu: 0.01 to 1.5%, Al≦0.01% and N: 0.0005 to 0.20%, and the balance substantially being Fe, with 1380−5000P−100S−4400C≧1300, Ni+10(Mo+0.5W)+100N≦200, (Ni−50)+10(N−0.1)−2(Cr−25)−5(Mo+0.5W−6)+12≧0, can be manufactured into a seamless pipe by use of a Mannesmann piercing and rolling mill because of its excellent inner surface properties. The resulting seamless pipe has excellent mechanical properties and moreover has excellent corrosion resistance in a sour gas environment, and thus, the Ni base alloy pipe stock can be used as a pipe stock for oil country tubular goods and line pipes and further as a pipe stock for various structural members of nuclear power plants and chemical industrial plants.

摘要翻译： 1.一种Ni基合金管材，其特征在于，以质量％计含有C <= 0.04％，Si <0.50％，Mn：0.01〜6.0％，P <0.03％，S <0.01％，Cr：15 至30％，Ni：大于45％至不超过60％，Mo：0至18％，W：0至36％，Mo（％）+ 0.5W（％）：大于1.5％至不超过 超过18％，Cu：0.01〜1.5％，Al≤0.01％，N：0.0005〜0.20％，余量基本上为Fe，1380-5000P-100S-4400C> = 1300，Ni + 10（Mo + 0.5 W）+ 100N <= 200，（Ni-50）+10（N-0.1）-2（Cr-25）-5（Mo + 0.5W-6）+12> = 0可制成无缝管 通过使用Mannesmann穿孔轧机，因为它具有优异的内表面性能。 所得到的无缝管具有优异的机械性能，并且在酸性气体环境中具有优异的耐腐蚀性，因此，Ni基合金管材可用作油井管状物料和管线管的管材，还可用作管材 为核电厂和化工厂的各种结构成员。

公开(公告)号：US20060283225A1

公开(公告)日：2006-12-21

申请号：US11312934

申请日：2005-12-21

申请人： Kazuhiro Shimoda ,  Tomio Yamakawa ,  Hiroyuki Semba ,  Hirofumi Hori ,  Tsuneo Kondo

发明人： Kazuhiro Shimoda ,  Tomio Yamakawa ,  Hiroyuki Semba ,  Hirofumi Hori ,  Tsuneo Kondo

IPC分类号： B21B19/04

CPC分类号： C22C38/44 ,  B21B3/02 ,  B21B19/04 ,  C22C38/02 ,  C22C38/58 ,  Y10S72/70

摘要： A pierced shell of an austenitic stainless steel having a good inner surface condition is provided, and a means is established which can perform mass production on an industrial scale of a good quality seamless steel pipe of stainless steel. An austenitic stainless steel billet with a P content of at most 0.040% and an S content of at most 0.020% is pierced under conditions such that the pipe expansion ratio H (outer diameter of shell/diameter of billet to be worked) satisfies the following equation to obtain a tube shell of an austenitic stainless steel. {P(%)/(0.025×H−0.01)}2+{S(%)/(0.015×H−0.01)}2≦1 When manufacturing a seamless steel pipe of an austenitic stainless steel, the above-described shell is rolled to form a pipe.

摘要翻译： 提供具有良好的内表面状态的奥氏体不锈钢的穿孔壳，并且建立了可以在不锈钢质量好的无缝钢管的工业规模上进行批量生产的手段。 在膨胀比H（壳的外径/待加工坯料直径）满足以下条件的条件下，对P含量为0.040％以下且S含量为0.020％以下的奥氏体不锈钢坯料进行穿孔 获得奥氏体不锈钢管壳的方程式。 <？in-line-formula description =“In-line Formulas”end =“lead”？> {P（％）/（0.025xH-0.01）} <2> + {S（％）/ （0.015×H-0.01）} <= 1 <？in-line-formula description =“In-line Formulas”end =“tail”？>制造奥氏体不锈钢的无缝钢管 钢，将上述壳体轧制成管。

公开(公告)号：US08784581B2

公开(公告)日：2014-07-22

申请号：US11643823

申请日：2006-12-22

申请人： Masaaki Igarashi ,  Kazuhiro Shimoda ,  Tomio Yamakawa ,  Hisashi Amaya

发明人： Masaaki Igarashi ,  Kazuhiro Shimoda ,  Tomio Yamakawa ,  Hisashi Amaya

IPC分类号： C21D8/10 ,  C22C38/00 ,  C22C38/04

CPC分类号： C22F1/10 ,  B21B23/00 ,  C21D8/10 ,  C22C19/055 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44

摘要： An Fe—Ni alloy pipe stock containing, by mass %, C≦0.04%, Si≦0.50%, Mn: 0.01 to 6.0%, P≦0.03%, S≦0.01%, Cr: 20 to 30%, Ni: 30 to 45%, Mo: 0 to 10%, W: 0 to 20%, with Mo(%)+0.5W(%): more than 1.5% to not more than 10%, Cu: 0.01 to 1.5%, Al≦0.01% and N: 0.0005 to 0.20%, and the balance being Fe, with 1440−6000P−100S−2000C≧1300, Ni+10(Mo+0.5W)+100N≦120, (Ni−35)+10(N−0.1)−2(Cr−25)−5(Mo+0.5W−3)+8≧0, can be manufactured into a seamless pipe by use of a Mannesmann piercing and rolling mill because of its excellent inner surface properties. The resulting seamless pipe has excellent mechanical properties and moreover has excellent corrosion resistance in a sour gas environment.

摘要翻译： 一种Fe-Ni合金管材，以质量％计含有C％，0.04％，Si＆NlE; 0.50％，Mn：0.01〜6.0％，P＆lt; L; 0.03％，S＆NlE; 0.01％，Cr：20〜30％，Ni：30 〜45％，Mo：0〜10％，W：0〜20％，Mo（％）+ 0.5W（％）：大于1.5％以上10％以下，Cu：0.01〜1.5％ 0.01％，N：0.0005〜0.20％，余量为Fe，1440-6000P-100S-2000C≥300，Ni + 10（Mo + 0.5W）+ 100N＆NlE; 120，（Ni-35）+10 -0.1）-2（Cr-25）-5（Mo + 0.5W-3）+8≥0可由Mannesmann穿孔轧机制成无缝管，因为其内表面性能优异。 所得到的无缝管具有优异的机械性能，并且在酸性气体环境中具有优异的耐腐蚀性。

公开(公告)号：US20130255342A1

公开(公告)日：2013-10-03

申请号：US13991635

申请日：2011-12-06

申请人： Kenichi Saitou ,  Kazuhiro Shimoda ,  Tomio Yamakawa

发明人： Kenichi Saitou ,  Kazuhiro Shimoda ,  Tomio Yamakawa

IPC分类号： B21B21/02

CPC分类号： B21B21/02 ,  B21B19/04 ,  B21B25/00 ,  B21B2261/08 ,  B21B2261/10

摘要： By using a piercing mill that includes a pusher on the entrance side, a plug on the exit side along a pass line, and a plurality of angled rolls as being provided around the plug so as face to each other, in the case where the maximum diameter of an unsound region consisting of center segregation and porosity in a cross section of a billet is d [mm], piercing-rolling is performed under the condition that the plug nose rolling reduction ratio (TDF) expressed by Formula (1) satisfies Formula (2). TDF=(Bd−D1)/Bd  (1) TDF≦−0.50×(d/Bd)+0.06  (6) In Formulae (1) and (2), Bd is the billet diameter [mm], and D1 is the opening [mm] between the angled rolls at the plug nose position. Thereby, when piercing-rolling is performed, the occurrence of an inner surface flaw attributable to the center segregation and porosity in the billet can be prevented reliably.

摘要翻译： 通过使用包括在入口侧的推动器的穿孔机，沿着通行线的出口侧的塞子和在插头周围设置成彼此面对的多个成角度的辊，在最大值 在坯料的横截面中由中心偏析和孔隙率组成的不固定区域的直径为d [mm]，在由式（1）表示的塞子前端滚动压下率（TDF）满足公式的条件下进行穿孔轧制 （2）。 TDF =（Bd-D1）/ Bd（1）TDF@-0.50×（d / Bd）+0.06（6）在公式（1）和（2）中，Bd是坯料直径[mm]，D1是 在插头前端位置的成角度的卷轴之间打开[mm]。 因此，当进行穿孔轧制时，可以可靠地防止由于中心偏析引起的内表面缺陷的发生和坯料中的孔隙率的发生。