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Document Title |
WO/2013/161489A1 |
In order to extend the service life of a plug used in a piercing machine that pierce-rolls a billet, a plug (10) used in a piercing machine (30) that pierce-rolls a billet (36) is equipped with a plug main body (12), a buildup layer (14)...
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WO/2013/161176A1 |
This method for manufacturing a plug that is used in a piercing and rolling machine, which is used in manufacturing seamless steel pipe, includes an arc spraying step in which iron wire is melted by an arc spraying machine, that molten m...
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WO/2013/157312A1 |
There is provided a plug for a heat-formed pipe that includes a sprayed coating that is difficult to peel off. A method for producing a plug for a heat formed pipe according to an aspect of the present embodiment includes a step for prep...
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WO/2013/157351A1 |
There is provided a round billet that allows for a reduction in damage to a piercing plug in a method for producing seamless metal tubes using the Mannesmann method. A round billet (5) is a round billet for seamless metal tubes processed...
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WO/2013/153878A1 |
The objective of the present invention is to provide a plug which is used in a piercing machine that pierce-rolls a billet, and for which the number of uses of said plug can be improved, and to provide a method for regenerating a plug. T...
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WO/2013/107845A1 |
The rolling stand comprises four support columns (2), two conical rolling rolls with skewed rolling axes which are oblique to each other and are fixed to two roll cradles (6, 7), four jacks (24, 26) below the lower roll cradle (7) for ex...
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WO/2013/065780A1 |
Provided is a boring device wherein the occurrence of flaws in the inner surface of a hollow shell is suppressed. A boring machine (10) according to an embodiment of the present invention is a boring device (10) for boring a billet (18)....
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WO/2013/065554A1 |
Provided is a seamless-metal-pipe manufacturing method whereby cracking of the pipe when in a molten state is inhibited. The seamless-metal-pipe manufacturing method in this embodiment is provided with the following steps: a step (S2) in...
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WO/2013/065553A1 |
Provided is a seamless-metal-pipe manufacturing method whereby cracking of the inner surface of the pipe is inhibited. The seamless-metal-pipe manufacturing method in this embodiment is provided with the following steps: a step (S2) in w...
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WO/2013/018564A1 |
The present invention provides a controlled rolling method of a seamless steel tube excellent in strength and low-temperature toughness to be applied to a process of making a seamless steel tube, and this controlled rolling method compri...
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WO/2012/173510A1 |
The invention relates to the field of rolling, in particular to the mechanical working of metals, and concerns screw piercing methods. The aim of the invention is to increase the quality and accuracy of the geometrical dimensions of tube...
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WO/2012/086177A1 |
In the piercing rolling using a plug having a protective coating film formed on the surface thereof, a lubricant agent that is an aqueous solution containing one or more of boron oxide, boric acid and a boron amine salt in the total amou...
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WO/2012/086179A1 |
When there is produced a round steel bar that comprises a high alloy containing Cr of 20 to 30 mass%, Ni of 30 to 50 mass%, and at least one kind of Mo and W that is 1.5 mass% in terms of Mo+0.5W, and in which a continuous casting slab h...
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WO/2012/077334A1 |
A pusher following a pass line is disposed on the entry side and a plug on the exit side, and a punch, in which a plurality of inclined rolls are disposed in opposition around a plug, is used. When the maximum diameter for an inferior qu...
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WO/2012/060358A1 |
Disclosed is a method for detecting defects in rotary piercing with high accuracy. A rotary piercing mill (10) is provided with piercer rollers (1a, 1b), a piercer plug (3), a rolling load sensor (4), a thrust load sensor (5) and a contr...
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WO/2012/003691A1 |
A planetary pipe rolling mill includes a feeding mechanism for feeding hollow casting blank, a planetary main machine (1) for rolling the hollow casting blank within which a roller group (11) and a rolling-die quick-cooling mechanism are...
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WO/2011/047524A1 |
A three-roller planetary rolling method for rolling brass pipe, includes the following steps: processing the front end of the raw pipe (1) to be a cone (11); selecting a mandrel (7) to make the unilateral gap (L) between the mandrel (7) ...
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WO/2011/039943A1 |
Disclosed are a retract mandrel mill and a method for rolling tubing using the mandrel mill. The retract mandrel mill is provided with a mandrel mill and an extractor. The mandrel mill includes a mandrel bar and is for rolling a tubing w...
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WO/2011/003501A1 |
The invention relates to a method for ironing roller spinning, in which method a tubular workpiece (10) is arranged around a rolling mandrel (20), is set in rotation and is formed by setting at least one forming roller (40) against it. D...
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WO/2010/139200A1 |
A rolling method for a shell ring includes a first roller (31) and a second roller (32) which extrude the inner wall and the outer wall of the shell ring respectively. The first roller (31) and the second roller (32) are driven by a driv...
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WO/2010/100968A1 |
A plug has a front portion of convex shape, a generally cylindrical portion, a trunk portion having an external radius gradually enlarging toward the rear end, a mandrel connecting portion at the rear end, and a lubricant path extending ...
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WO/2009/147087A1 |
A rolling mill of rotating expander type for tubular bodies, comprising: working rollers (1, 2) arranged inclined with respect to the rolling axis; a tip (3) fitted on a beam (4), so that the tubular body is pushed in rotation between th...
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WO/2009/122620A1 |
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 groo...
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WO/2009/118957A1 |
Disclosed is a high-alloy seamless steel pipe manufacturing method, in which a high-alloy steel billet heated to a temperature range of 900 to 1250 °C is pierced and rolled by a piercer equipped with a main roll having a surface roughne...
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WO/2009/119245A1 |
A method for producing a seamless pipe by performing the piercing rolling of round billets heated to 1250°C or less by means of a piercer where plugs are arranged along a pass line between a pair of inclined rolls and a pair of guide me...
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WO/2009/049589A1 |
The invention relates to a method for measuring the eccentricity of a hot-fabricated seamless steel tube during production, in which the tube is produced in the form of a hollow block tube from a solid block or from a hollow block tube w...
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WO/2009/011146A1 |
A pusher device (4) has a cylinder device (30) and a pusher core (34). The cylinder device (30) has a cylinder shaft (32). The pusher core (34) is fitted to the front end of the cylinder shaft (32). The front end of the pusher core (34) ...
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WO/2008/142803A1 |
[PROBLEMS] To provide a method, and apparatus, for piercing and rolling a seamless pipe, with which material peeling can be prevented even when a pipe expansion ratio is raised through increasing of skew angle δ. [MEANS FOR SOLVING PROB...
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WO/2008/138032A1 |
A method of cold forming a length of polycarbonate sheet, including the step of feeding the polycarbonate sheet through a roll forming station. A security panel having opposed side edges bent to extend back over a central portion of the ...
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WO/2008/126427A1 |
A boring machine (10) comprises a plurality of slant rolls (1), a plug (2), a pusher (4), and a guide roll (6). The pusher (4) pushes a round billet (20) from the rear end at least until the round billet (20) advances a predetermined dis...
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WO/2008/081866A1 |
A raw material to be rolled made of a high-chromium high-nickel alloy steel containing, in terms of mass%, 20-30% chromium, 30-50% nickel, and at least one of molybdenum and tungsten, the amount of the latter two being 1.5% or more in te...
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WO/2008/062752A1 |
In the manufacture of a seamless pipe, a piercing rolling has the following characteristics (a) to (d). (a): a plug tip drawing ratio (TDFT) is 0.04 or less, or the root (TDFT x N)0.5 of the product of TDFT and a billet rotation speed (N...
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WO/2008/032508A1 |
A device for monitoring the manufacturing status of a seamless pipe, capable of quickly correcting manufacturing conditions during operation of a seamless pipe manufacturing facility. The device (20) for monitoring the manufacturing stat...
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WO/2008/020510A1 |
A high quality hollow material pipe is produced surely by controlling the number of times of rotary forging and shear deformation in an unsteady region during biting, preventing occurrence of flaw on the inner surface resulting from rota...
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WO/2007/122972A1 |
A lubricant composition for hot plastic working and a method of hot plastic working which are effective in preventing the surface of a material being processed by hot plastic working from suffering mars. The lubricant composition for hot...
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WO/2007/116821A1 |
In this method of manufacturing a seamless pipe, a billet is disposed on a pass line between a pusher and a plug and is moved forward until it is caught between skewed rolls. Then, after the caught billet is in contact with the plug unti...
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WO/2007/110930A1 |
A process for producing a seamless pipe characterized by including a continuous casting step in which a round billet is cast in which the whole region in a central part having a diameter of at least 60 mm in the cross section is constitu...
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WO/2007/100259A1 |
Abstract A tool (16) for connecting and disconnecting tubulars near a drill floor (2), comprising a power tong (18) and a backup tong (20), wherein the tool (16) is located at the same level as or below the drill floor (2).
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WO/2007/100042A1 |
A billet containing, by mass, 8.0 to 16.0% Cr whose value of the formula: Cr+4Si-(22C+0.5Mn+1.5Ni+30N) wherein the atomic symbols represent the mass% contents of respective constituent elements in steel is 9.0% or less is heated by means...
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WO/2007/094424A1 |
A disk roll comprises a shaft member and a circular ring member fitted to the outer periphery of the shaft member. The ring member is formed in a circular ring shape and fitted to the disk-like shaft member. The ring member is formed of ...
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WO/2006/134957A1 |
A plug (2) used for a boring machine, comprises a tip part (23), a cylindrical part (24), a body part (25), a core joining part (22), and a jetting hole (21). The jetting hole (21) is passed through from the surface of the cylindrical pa...
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WO/2006/133696A1 |
The invention relates to a device for the production of a seamless hollow body (10) from a solid round block (7) of steel with a diameter < 95 % of the diameter of the solid round block by means of a twin-roller cross-rolling mill on a m...
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WO/2006/126678A1 |
A roll for rolling seamless pipes which has a roll neck and a roll body, wherein the surface layer of the roll body comprises by mass: C: 1.5 to 2.5%, Si: 1.3 to 3.5%, Mn: 0.1 to 2.0%, Ni: 0.5 to 8.0%, Cr: 0.1 to 2.0%, Mo: 0.2 to 5.0%, V...
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WO/2006/106802A1 |
A method for producing a seamless tube while reducing the inner surface scratches comprising a piercing step, in which the relations shown by expressions (1)-(3) are simultaneously satisfied if the diameter of a billet is R(m), the crack...
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WO/2006/085599A1 |
A seizing inhibitor for hot plastic working which is a two-pack type inhibitor consisting of: a first aqueous solution containing sodium silicate in an amount of 10-30 mass% in terms of anhydride amount based on the whole first aqueous s...
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WO/2006/003954A1 |
A nickel base alloy material tube which has a chemical composition that 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 % and not more than 60 %, Mo: 0 to 18 %, W: 0 to 36 %, w...
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WO/2006/003953A1 |
A raw pipe made of an Fe-Ni alloy, which has a chemical composition that C: 0.04 % or less, Si: 0.50 % or less, Mn: 0.01 to 6.0 %, P: 0.03 % or less, S: 0.01 % or less, Cr: 20 to 30 %, Ni: 30 to 45 %, Mo: 0 to 10 %, W: 0 to 20 %, Cu: 0.0...
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WO/2005/123289A1 |
A process for producing a seamless steel pipe, in which the occurrence of inner surface flaw in the pipe can be reduced through lowering of the friction coefficient at draw rolling by means of a mandrel mill. At the draw rolling of hollo...
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WO/2005/115650A1 |
A round billet comprising 10.50 to 14.00% by mass of Cr and satisfying a value of not more than 9.0% as determined by a formula [Cr + 4Si - (22C + 0.5Mn + 1.5Ni + 30N)] wherein the symbol of element represents the content (% by mass) of ...
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WO2005068098A9 |
A method for producing a seamless pipe in which carburization occurring in the production process of a pipe is prevented and the stretch-rolling process is rationalized. In the process of producing a seamless pipe, a pipe bored in a bori...
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