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Patent Searching and Data


Matches 301 - 350 out of 2,083

Document Document Title
JP2006281283A
To provide an Assel mill rolling method for preventing the generation of thickness deviation in a steel tube.In this Assel mill rolling method for preventing the generation of the thickness deviation of the steel tube, the thickness devi...  
JP2006272371A
To provide a manufacturing method and a manufacturing apparatus of a seamless tube in which the balance of the necessary and sufficient cooling of main rolls and the quantity of an antiseize agent remained on the surface of disk rolls or...  
JP3855300B2
To provide a method for efficiently producing on-line a seamless steel pipe excellent in the performance, and also provide an on-line equipment therefor having apparatuses from casting to heat treatment. This production method comprises ...  
JP2006231354A
To provide a method of manufacturing an ultra thin-walled seamless tube by which a hot manufactured seamless metallic tube is used as a tube stock and the manufacturable range on the thin-wall side of the metallic tube can be radically e...  
JP2006219556A
To obtain a two-pack type anti-seizing agent for hot plastic working, in which since an anti-seizing agent applied to a disk roll type guide shoe is not made to flow by cooling water of a roll, the anti-seizing agent is supplied and reta...  
JP2006181596A
To provide a method for piercing a piercer by which the internal surface flaws of a shell after piercing can be suppressed.In this method, the conditions of the piercer are set so that the number N of rotary forging which is defined by t...  
JP3823762B2
To provide a production method for a seamless steel pipe which controls Mannesmann destruction and circumferential shearing strain and produces a product having less inner roll marks with a high productivity. A plug as shown in Fig. 3 is...  
JP3820896B2
To provide an inclined rolling machine for a seamless pipe and a rolling method thereof by which the baking of a disc roll comprising the inclined rolling machine can be suppressed, and the fault of a guide mark can be reduced. In rollin...  
JP2006116584A
To provide a manufacturing method of a seamless steel tube by Mannesmann piercing process by which thickness deviation and deterioration of biting ability are prevented and the generation of inside surface flaws is decreased in the manuf...  
JP2006110590A
To provide a method for manufacturing a seamless steel tube by which the seamless steel tube where occurrence of inner surface defects is reduced is manufactured, even when performing piercing rolling by using high Cr-containing steel or...  
JP2006095565A
To provide a method for continuously casting a large diameter cast billet with which crack in the axial center part of the cast billet can be reduced, and a method for making a pipe with which even in the case of piercing-rolling the rou...  
JP3785916B2
To provide a method for rolling a seamless steel pipe capable of suppressing the generation of non-uniform thickness, and rolling high quality hollow pipes in the method which performs, holding a hollow pipe with a holding device, a roll...  
JP3785930B2
To accurately detect the generation of end-blocking deemed undetectable. A device for detecting a slip is provided with: a detecting means 14 for a driving torque current of the main roll of a piercer, a detecting means 18 for a driving ...  
JP3777997B2
To provide a manufacturing method of a seamless steel tube which is excellent in quality of internal surface. This method is a method for manufacturing the seamless tube by piercing a billet by using a plug on the surface of which a scal...  
JP2005334964A
To provide a method for producing a seamless steel tube in which the generation of inside flaws can be suppressed.A columnar steel having an old austenite intergranular structure comprising ferrite or ferrite and pearlite and an old aust...  
JP3738660B2
To provide a martensitic seamless stainless steel pipe whose surface is provided with scale excellent in adhesion and to provide its producing method. This martensitic seamless stainless steel pipe contains, by mass, 0.2 to 0.5% Ni and 9...  
JP2005246416A
To coincide the center of a mill stand with the center of a rolling roll about all inner housing in a pipe mill for producing many kinds.This method is a mounting method of an inner housing in a three-roll type pipe mill. When expressing...  
JP2005232539A
To provide a non-heat-treated seamless steel pipe which balances high strength with high toughness without being heat-treated, and further secures adequate weldability.The non-heat-treated seamless steel pipe comprises, by mass%, 0.10-0....  
JP2005211911A
To provide a method for preventing the end crack of a seamless steel pipe in straightening the steel pipe.The method for preventing the end crack in straightening the steel pipe performs roll straightening by heating the steel pipe end b...  
JP2005211912A
To provide a method for preventing any uneven thickness of a seamless steel tube.In the uneven thickness preventive method of a seamless steel tube, the amplitude of a mandrel during the drilling is measured in a seamless steel tube manu...  
JP2005211920A
To lighten the load at boring time of a seamless steel pipe with skew rolling, by that linear segregation except the central part in a bloom with a continuous casting is lightened to form only the center segregation and easily perform th...  
JP2005211973A
To provide a method for minimizing the inside surface flaws of a steel pipe obtained by regulating the relationship between the distribution form and amount of the porosities of a round steel billet which must be controlled by various fa...  
JP2005202803A
To provide a learning control method capable of preventing learning accuracy from deteriorating if errors are greatly changed by factors that change over time or if learning has not been fully achieved as manufacturing conditions vary gr...  
JP3692597B2
To reduce the defective ratio of a hollow stock tube and to improve the yield by predicting the fusing damage of the tip part of a plug based on the measured result of a measuring means of a billet progressing velocity and a measuring me...  
JP2005163167A
To provide a rotary hearth equipment in a seamless steel tube manufacturing line, and a seamless steel tube manufacturing method using the same.In the rotary hearth equipment in the seamless steel tube manufacturing line, a billet is lif...  
JP2005131688A
To provide a manufacturing method of seamless steel tube for a boiler and its piping, which does not cause a rolling defect on a product, even when a Mannesmann type skew rolling process is adopted.A material consisting of C:≤0.15 mass...  
JP2005111518A
To provide a method for manufacturing a seamless tube with a three-roll mandrel mill by which defective pulling-out of a mandrel bar after rolling and occurrence of scratches with the mandrel bar inside tubing are effectively suppressed ...  
JP2005105379A
To provide a method for inexpensively manufacturing a seamless steel pipe superior in grain size properties and cold workability, without deteriorating quality through decarbonization or the like.A material of the steel pipe comprises, b...  
JP2005068490A
To provide a solid round billet having favorable biting property and anti-slipping property for a tilted roll type piercer, to provide its manufacturing method, and to provide an efficient method for manufacturing a martensite stainless ...  
JP2005046893A
To provide a method for suppressing deviation in the wall-thickness of a seamless steel tube which can produce a seamless steel tube having a more even, that is, less deviated wall-thickness in a tubular circumferential direction than a ...  
JP3646417B2
To reduce the producing cost of a seamless steel tube containing Cr by using saddle type roll having a prescribed angle range of an opening angle at the caliber bottom in one pair of rolls. Rolling reduction is applied to a cast billet 1...  
JP2005015823A
To provide a high strength steel pipe which has excellent deformability and an excellent strength of X 80 to 100 class in the API standards and is suitable for a pipeline, and to provide its production method.In the high strength steel p...  
JP2005014032A
To provide a method for manufacturing a seamless stainless steel tube made of two-phase stainless steel excellent in the quality of the inside surface by using Mannesmann tube making process including stretch reduction.The method is prov...  
JP2005014031A
To provide a method for manufacturing a seamless chromium steel tube by which the seamless high chromium steel tube is manufactured without making roll marks occur frequently even in a method for manufacturing a seamless steel tube using...  
JP3633434B2
To prevent generation of flows on the outer surface of a martensitic stainless steel piece containing Cr: 10.0∼16.0 wt.%, Ni: 1.0∼8.0 wt.% in rolling it. A lower layer of oxide scale produced on the surface of a martensitic stainless...  
JP3606949B2  
JP3598771B2  
JP2004314172A
To improve the production efficiency and the reliability of a planetary skew rolling mill in a method for manufacturing a tube from a metallic material.An inner tool (5) is pulled back from the working position (8) by a prescribed amount...  
JP2004306037A
To provide a control method of hot sizing for finishing the outside diameter of a seamless steel tube into a complete round.The locally incomplete roundness is prevented by controlling the motor current value I and/or the number N of rev...  
JP2004285433A
To provide a method for producing a soft stainless steel seamless tube used for blank tube expanded to the diameter in cold state or in hot state for obtaining a large diameter medium C-martensite stainless steel seamless tube.To the sta...  
JP2004255427A
To prevent the outer surface quality of a product from deteriorating by preventing rolling chips seized to a grooved roll edge part from damaging the outer surface of the succeeding material to be rolled in the sizing rolling by a sinkin...  
JP2004250729A
To provide a cast roll material for rolling a seamless steel pipe, having superior slipping resistance and inhibiting occurrence of the surface damage, and to provide a roll for rolling the seamless steel pipe.The cast roll material has ...  
JP3564314B2  
JP2004238662A
To provide a martensitic stainless steel pipe superior in corrosion resistance, crushing resistance and toughness, and to provide a method for manufacturing the above steel pipe without heat-treating it.(1) The martensitic stainless stee...  
JP2004223592A
To provide a method for remachining a roll by which shortening of roll remachining time and the reduction of the cost of roll remachining tools and the cost of rolls are realized by reducing the machining allowance in the direction perpe...  
JP3580197B2
To provide a manufacturing method of seamless steel tubes which is devised so as to preliminarily reduce surplus for a small lot of materials. This is a method for manufacturing the seamless steel tubes on a manufacturing line in which a...  
JP2004211115A
To provide a method for producing a copper pipe by which a small diameter copper pipe having an outer diameter of ≤ 10 mm produced by applying a cold-working of a large reducing area ratio of ≥ 99% to an extruded blank pipe hardly ca...  
JP3578052B2
To provide a piercing rolling method of a seamless steel pipe preventing seizure on disk rolls. In piercing rolling of the seamless steel pipe by means of a rolling machine having a pair of disk rolls, the piercing rolling method of the ...  
JP2004195468A
To provide a rolling method and a rolling device by which the miniaturization of the device and the problem of noise are dissolved, not only rolling from the large diameter to the small diameter is enabled, but various rolling operations...  
JP2004122137A
To provide a manufacturing method of seamless martensitic stainless steel tube by which roll marks are not generated on products even when Mannesmann skew rolling method is adopted.When the seamless steel tube is manufactured in a mandre...  

Matches 301 - 350 out of 2,083