公开(公告)号：US06290789B1

公开(公告)日：2001-09-18

申请号：US09254024

申请日：1999-02-26

申请人： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Taro Kanayama ,  Masahiko Morita ,  Saiji Matsuoka ,  Nobuki Tanaka ,  Osamu Furukimi ,  Takaaki Hira

发明人： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Taro Kanayama ,  Masahiko Morita ,  Saiji Matsuoka ,  Nobuki Tanaka ,  Osamu Furukimi ,  Takaaki Hira

IPC分类号： C21D908

CPC分类号： C21D8/10 ,  C21D2201/00

摘要： A steel pipe containing fine ferrite crystal grains, which has excellent toughness and ductility and good ductility-strength balance as well as superior collision impact resistance, and a method for producing the same are provided. A steel pipe containing super-fine crystal grains can be produced by heating a base steel pipe having ferrite grains with an average crystal diameter of di (&mgr;m), in which C, Si, Mn and Al are limited within proper ranges, and if necessary, Cu, Ni, Cr and Mo, or Nb, Ti, V, B, etc. are further added, at not higher than the Ac3 transformation point, and applying reducing at an average rolling temperature of &thgr;m (°C.) and a total reduction ration Tred (%) within s temperature range of from 400 to Ac3 transformation point, with di, &thgr;m and Tred being in a relation satisfying a prescribed equation.

摘要翻译： 提供了具有优异的韧性和延展性以及良好的延展性 - 强度平衡以及优异的抗冲击冲击性的细铁素体晶粒的钢管及其制造方法。 含有超细晶粒的钢管可以通过加热具有平均晶体直径为二（母）的铁素体晶粒的基础钢管，其中C，Si，Mn和Al被限制在适当的范围内，如果需要 进一步添加Cu，Ni，Cr和Mo，或Nb，Ti，V，B等，不高于Ac 3相变点，并以平均轧制温度（℃）和 总还原率Tred（％）在400至Ac3相变点的s温度范围内，di，tt和tred处于满足规定方程的关系。

公开(公告)号：US06202463B1

公开(公告)日：2001-03-20

申请号：US09214935

申请日：1999-01-15

申请人： Akira Yorifuji ,  Takaaki Toyooka ,  Taro Kanayama

发明人： Akira Yorifuji ,  Takaaki Toyooka ,  Taro Kanayama

IPC分类号： B21B1710

CPC分类号： B21B25/00

摘要： This invention provide a plug and a mandrel bar for use in rolling a seamless steel pipe of which life can be substantially improved more than that of the prior art under a severe condition of use always exposed to a high temperature and high load. The entire plug or the mandrel bar or at least the surface layer of the extremity end and the work section of it is made of ceramics. In addition, this invention provides a method for manufacturing a seamless steel pipe using such a plug or mandrel bar as described above.

摘要翻译： 本发明提供了一种用于轧制无缝钢管的塞子和芯棒，其在始终暴露于高温高负荷的苛刻条件下，寿命比现有技术大大提高。 整个塞子或芯棒或至少其端部的表面层和其工作部分由陶瓷制成。 此外，本发明提供一种使用如上所述的塞子或芯棒来制造无缝钢管的方法。

公开(公告)号：US5859124A

公开(公告)日：1999-01-12

申请号：US839209

申请日：1997-04-22

申请人： Akira Yorifuji ,  Takaaki Toyooka ,  Ken Shimamoto ,  Masaharu Kita ,  Taro Kanayama

发明人： Akira Yorifuji ,  Takaaki Toyooka ,  Ken Shimamoto ,  Masaharu Kita ,  Taro Kanayama

IPC分类号： B21B25/04 ,  B21B19/02 ,  B21B45/02 ,  C10M173/02 ,  C10N10/02 ,  C10N10/08 ,  C10N20/00 ,  C10N30/06 ,  C10N40/24

CPC分类号： B21B45/0242 ,  C10M173/02 ,  B21B19/02 ,  B21B2045/026 ,  B21B45/0257 ,  B21B45/0263 ,  C10M2201/02 ,  C10M2201/062 ,  C10M2201/063 ,  C10M2201/08 ,  C10M2201/081 ,  C10M2201/082 ,  C10M2201/084 ,  C10M2201/087 ,  C10M2201/10 ,  C10M2201/102 ,  C10M2201/105 ,  C10M2207/121 ,  C10M2207/122 ,  C10M2207/125 ,  C10M2207/129 ,  C10M2207/289 ,  C10M2207/40 ,  C10M2207/404 ,  C10M2209/104 ,  C10M2209/12 ,  C10M2215/04 ,  C10M2215/26 ,  C10M2219/042 ,  C10M2219/044 ,  C10M2223/10 ,  C10M2227/04 ,  C10N2210/01 ,  C10N2240/402 ,  C10N2240/403 ,  C10N2240/404 ,  C10N2240/405 ,  C10N2240/406 ,  C10N2240/407 ,  C10N2240/408 ,  C10N2240/409 ,  C10N2250/02 ,  C10N2250/121

摘要： A lubricant is provided for use in hot working such as cross-roll rolling of a seamless steel pipe. It effectively reduces the friction coefficient between the working tools and the material under the hot work, thus extending the lives of the tools. The lubricant contains: (A) from about 10 to about 60 wt % of alkali silicate; (B) from about 1 to about 20 wt % of silane coupling agent; (C) from about 0.1 to about 5.0 wt % of at least one kind of alkali compound selected from a group consisting of an alkali hydroxide, an alkali carbonate, an alkali borate and an alkali salt of mineral acid; and (D) from about 30 to about 70 wt % of water. Alternatively, the lubricant contains: (A) from about 10 to about 60 wt % of alkali silicate; (B) from about 1 to about 20 wt % of silane coupling agent; (C) from about 0.1 to about 5.0 wt % of at least one kind of alkali compound selected from a group consisting of an alkali hydroxide, an alkali carbonate, an alkali borate and an alkali salt of mineral acid; (D) from about 5 to about 50 wt % of water; (E) from about 10 to about 60 wt % of iron oxide; and (F) from about 0.1 to about 5.0 wt % of at least one additive selected from a group consisting of a dispersant and a thickening agent.

公开(公告)号：US06331216B1

公开(公告)日：2001-12-18

申请号：US09214226

申请日：1998-12-30

申请人： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Nobuki Tanaka ,  Taro Kanayama ,  Osamu Furukimi ,  Masahiko Morita ,  Takaaki Hira ,  Saiji Matsuoka

发明人： Takaaki Toyooka ,  Akira Yorifuji ,  Masanori Nishimori ,  Motoaki Itadani ,  Yuji Hashimoto ,  Takatoshi Okabe ,  Nobuki Tanaka ,  Taro Kanayama ,  Osamu Furukimi ,  Masahiko Morita ,  Takaaki Hira ,  Saiji Matsuoka

IPC分类号： C21D713

CPC分类号： C21D8/10 ,  C21D2201/00 ,  C21D2211/005

摘要： The steel pipe has a structure composed mainly of ferrite or ferrite plus pearlite or ferrite plus cementite. The steel pipe is characterized by grain size not greater than 3 &mgr;m, preferably not greater than 1 &mgr;m, elongation greater than 20%, tensile strength (TS:MPa) and elongation (E1:%) whose product is greater than 10000, and percent ductile fracture greater than 95%, preferably 100%, measured by Charpy impact test on an actual pipe at −100° C. The structure is characterized by C: 0.005-0.03%, Si: 0.01-3.0%, Mn: 0.01-2.0%, and Al: 0.001-0.10% on a weight basis, and is composed of ferrite or ferrite and a secondary phase, with ferrite grains being not greater than 3 &mgr;m and the secondary phase having an areal ratio not more than 30%. A steel pipe stock having the above-mentioned composition is heated at a temperature of (Ac1+50° C.) to 400° C. and subsequently reduced at a rolling temperature of (Ac1+50° C.) to 400° C. such that the cumulative reduction of diameter is greater than 20%. The reducing is preferably performed such that at least one of rolling passes reduces the diameter by more than 6% per pass. The steel pipe will have high ductility and high strength and will be superior in toughness and stress corrosion cracking resistance, if the content of C, Si, Mn, and other alloying elements is limited low and reducing is performed at the temperature specified above. The resulting steel pipe has good fatigue resistance and is suitable for use as line pipe.

摘要翻译： 钢管具有主要由铁素体或铁素体加珠光体或铁素体和渗碳体组成的结构。 钢管的特征在于，其粒径不大于3μm，优选不大于1μm，伸长率大于20％，拉伸强度（TS：MPa）和伸长率（E1：％）大于10000， 延性断裂大于95％，优选100％，通过夏比冲击试验在-100℃的实际管上测量。该结构的特征在于C：0.005-0.03％，Si：0.01-3.0％，Mn：0.01-2.0 ％，Al：0.001-0.10％，由铁素体或铁素体和二次相组成，铁素体晶粒不大于3μm，第二相的面积比不大于30％。 将具有上述组成的钢管坯料在（Ac1 + 50℃）的温度下加热至400℃，随后在（Ac1 + 50℃）的轧制温度下降低至400℃。 使得直径的累积减小大于20％。 优选地进行还原，使得至少一个轧制通道将直径每次通过减少6％以上。 如果C，Si，Mn和其他合金元素的含量低，并且在上述规定的温度下进行还原，则钢管将具有高延展性和高强度，并且在韧性和耐应力腐蚀开裂性方面优异。 所得钢管具有良好的抗疲劳性能，适用于管线管。

公开(公告)号：US5983689A

公开(公告)日：1999-11-16

申请号：US177473

申请日：1998-10-23

申请人： Akira Yorifuji ,  Takaaki Toyooka ,  Ken Shimamoto ,  Masaharu Kita ,  Taro Kanayama

发明人： Akira Yorifuji ,  Takaaki Toyooka ,  Ken Shimamoto ,  Masaharu Kita ,  Taro Kanayama

IPC分类号： B21B25/04 ,  B21B19/02 ,  B21B45/02 ,  C10M173/02 ,  C10N10/02 ,  C10N10/08 ,  C10N20/00 ,  C10N30/06 ,  C10N40/24

CPC分类号： B21B45/0242 ,  C10M173/02 ,  B21B19/02 ,  B21B2045/026 ,  B21B45/0257 ,  B21B45/0263 ,  C10M2201/02 ,  C10M2201/062 ,  C10M2201/063 ,  C10M2201/08 ,  C10M2201/081 ,  C10M2201/082 ,  C10M2201/084 ,  C10M2201/087 ,  C10M2201/10 ,  C10M2201/102 ,  C10M2201/105 ,  C10M2207/121 ,  C10M2207/122 ,  C10M2207/125 ,  C10M2207/129 ,  C10M2207/289 ,  C10M2207/40 ,  C10M2207/404 ,  C10M2209/104 ,  C10M2209/12 ,  C10M2215/04 ,  C10M2215/26 ,  C10M2219/042 ,  C10M2219/044 ,  C10M2223/10 ,  C10M2227/04 ,  C10N2210/01 ,  C10N2240/402 ,  C10N2240/403 ,  C10N2240/404 ,  C10N2240/405 ,  C10N2240/406 ,  C10N2240/407 ,  C10N2240/408 ,  C10N2240/409 ,  C10N2250/02 ,  C10N2250/121

摘要： A lubricant is provided for use in hot working such as cross-roll rolling of a seamless steel pipe. It effectively reduces the friction coefficient between the working tools and the material under the hot work, thus extending the lives of the tools. The lubricant contains: (A) from about 10 to about 60 wt % of alkali silicate; (B) from about 1 to about 20 wt % of silane coupling agent; (C) from about 0.1 to about 5.0 wt % of at least one kind of alkali compound selected from a group consisting of an alkali hydroxide, an alkali carbonate, an alkali borate and an alkali salt of mineral acid; and (D) from about 30 to about 70 wt % of water. Alternatively, the lubricant contains: (A) from about 10 to about 60 wt % of alkali silicate; (B) from about 1 to about 20 wt % of silane coupling agent; (C) from about 0.1 to about 5.0 wt % of at least one kind of alkali compound selected from a group consisting of an alkali hydroxide, an alkali carbonate, an alkali borate and an alkali salt of mineral acid; (D) from about 5 to about 50 wt % of water; (E) from about 10 to about 60 wt % of iron oxide; and (F) from about 0.1 to about 5.0 wt % of at least one additive selected from a group consisting of a dispersant and a thickening agent.

摘要翻译： 提供用于无缝钢管的横向轧制的热加工中使用的润滑剂。 它有效地降低了加工工具与热加工之间的材料之间的摩擦系数，从而延长了工具的使用寿命。 润滑剂含有：（A）约10至约60重量％的碱金属硅酸盐; （B）约1至约20重量％的硅烷偶联剂; （C）约0.1〜5.0重量％的选自碱金属氢氧化物，碱金属碳酸盐，碱金属硼酸盐和无机酸碱金属盐中的至少一种碱金属化合物; 和（D）约30至约70重量％的水。 或者，润滑剂含有：（A）约10至约60重量％的碱金属硅酸盐; （B）约1至约20重量％的硅烷偶联剂; （C）约0.1〜5.0重量％的选自碱金属氢氧化物，碱金属碳酸盐，碱金属硼酸盐和无机酸碱金属盐中的至少一种碱金属化合物; （D）约5至约50重量％的水; （E）约10至约60重量％的氧化铁; 和（F）约0.1至约5.0重量％的至少一种选自分散剂和增稠剂的添加剂。

公开(公告)号：US5813962A

公开(公告)日：1998-09-29

申请号：US881231

申请日：1997-06-24

申请人： Taro Kanayama ,  Akira Yorifuji ,  Toshiaki Kasuya ,  Yuichiro Sato ,  Shoitsu Seo ,  Satoshi Matsuoka

发明人： Taro Kanayama ,  Akira Yorifuji ,  Toshiaki Kasuya ,  Yuichiro Sato ,  Shoitsu Seo ,  Satoshi Matsuoka

IPC分类号： B21B27/00 ,  C21D7/13 ,  C21D9/38 ,  C22C38/12

CPC分类号： B21B27/00 ,  C21D7/13 ,  C21D9/38 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/009 ,  Y10T29/4956 ,  Y10T29/49565

摘要： A forged roll for rolling a seamless steel pipe, having excellent biting properties and wear resistance. The forged roll includes a high carbon alloy cast steel comprising about 1.10-1.85 wt % carbon, about 0.3-1.2 wt % silicon, about 0.4-1.5 wt % manganese, about 0.5-2.0 wt % nickel, about 0.5-2.0 wt % chromium and iron. Heat treatment for spheroidal carbide formation is performed so that the spheroidal carbide covers about 35-55% of the area of the roll metallurgical structure.

摘要翻译： 用于轧制无缝钢管的锻造辊，具有优异的咬合性能和耐磨性。 锻造辊包括高碳合金铸钢，其包含约1.10-1.85重量％的碳，约0.3-1.2重量％的硅，约0.4-1.5重量％的锰，约0.5-2.0重量％的镍，约0.5-2.0重量％的铬 和铁。 进行球形碳化物形成的热处理，使得球状碳化物覆盖辊冶金结构面积的约35-55％。

公开(公告)号：US5950310A

公开(公告)日：1999-09-14

申请号：US095814

申请日：1998-06-11

申请人： Taro Kanayama ,  Akira Yorifuji ,  Toshiaki Kasuya ,  Yuichiro Sato ,  Shoitsu Seo ,  Satoshi Matsuoka

发明人： Taro Kanayama ,  Akira Yorifuji ,  Toshiaki Kasuya ,  Yuichiro Sato ,  Shoitsu Seo ,  Satoshi Matsuoka

IPC分类号： B21B27/00 ,  C21D7/13 ,  C21D9/38 ,  B23Q7/10

CPC分类号： B21B27/00 ,  C21D7/13 ,  C21D9/38 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/009 ,  Y10T29/4956 ,  Y10T29/49565

摘要： A forged roll for rolling a seamless steel pipe, having excellent biting properties and wear resistance, and manufacturing method. The forged roll comprises a high carbon alloy cast steel comprising about 1.10-1.85 wt % carbon, about 0.3-1.2 wt % silicon, about 0.4-1.5 wt % manganese, about 0.5-2.0 wt % nickel, about 0.5-2.0 wt % chromium and iron. Heat treatment for spheroidal carbide formation is performed so that the spheroidal carbide covers about 35-55% of the area of the roll metallurgical structure.

摘要翻译： 用于轧制无缝钢管的锻造辊，具有优异的咬合特性和耐磨性，以及制造方法。 锻造辊包括高碳合金铸钢，其包含约1.10-1.85重量％的碳，约0.3-1.2重量％的硅，约0.4-1.5重量％的锰，约0.5-2.0重量％的镍，约0.5-2.0重量％的铬 和铁。 进行球形碳化物形成的热处理，使得球状碳化物覆盖辊冶金结构面积的约35-55％。