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Matches 251 - 300 out of 2,078

Document Document Title
JP4231631B2  
JP2009018338A
To provide a pusher device with which thickness deviation in the top part of a tube stock manufactured by pusher piercing is suppressed.The pusher device 4 is provided with a cylinder device 30 and a pusher mandrel 34. The cylinder devic...  
JP4200829B2  
JP4196991B2  
JP2008543569A  
JP4169858B2  
JP4155267B2  
JP2008214713A
To provide a billet which suppresses the generation of an intermetallic compound entailing the deterioration of toughness and corrosion resistance and a seamless steel tube using the billet.There are provided the billet for the seamless ...  
JP4150585B2  
JP4145764B2  
JP2008531286A  
JP4133103B2  
JP4126979B2  
JP2008161912A
To provide a method of manufacturing seamless steel tubes by which the deterioration of surface roughening is deterred without damaging the biting property of barrel-shaped rolling rolls.This method of manufacturing the seamless tubes is...  
JP2008161906A
To provide a method for producing a seamless steel pipe made of a high Cr-high Ni-based alloy in which the generation of melted inside rash is prevented, and also, the service life of a plug can be improved.When the stock to be rolled ma...  
JP2008161900A
To provide a method of manufacturing a medium-diameter seamless steel pipe by which occurrence of eccentric uneven-thickness defect is detected on the spot during the piercer rolling of the same pipe-making lot in which the thickness of ...  
JP4117955B2  
JP4107199B2  
JP2008137026A
To provide a barreled rolling roll for inclined rolling mill and a method for manufacturing a seamless steel pipe, capable of relaxing the generation of a flaw caused by a knurling.The barreled rolling roll provided with the ball head re...  
JP4103082B2  
JP2008126255A
To provide the technique of manufacturing a seamless tube excellent in quality at high productivity.Piercing and rolling are performed by using a piercing mill provided with inclined rolls under conditions that the reduction ratio TDFT a...  
JP4094462B2  
JP2008062294A
To provide a monitoring apparatus etc. of manufacturing conditions for seamless pipes which enables quick correction of manufacturing conditions during operation of seamless pipe manufacturing equipment.The manufacturing condition monito...  
JP4059099B2  
JP4051918B2  
JP4045813B2  
JP2007537874A  
JP2007290020A
To provide a method of manufacturing a medium diameter seamless pipe by which eccentric uneven thickness of the rolled stock succeeding to a detected rolled stock is reduced by detecting the generation of the eccentric uneven thickness o...  
JP4000738B2  
JP2007260685A
To provide a piercer plug and a piercing and rolling method by which the life of the piercer plug is lengthened and also the occurrence of slip or miss roll during piercing and rolling is prevented. In this piercer plug 3, the coefficien...  
JP2007229795A
To provide barrel-shaped piercer rolls with which shearing strain in the circumferential direction is reduced. In these barrel-shaped piercer rolls for reducing shearing strain in the circumferential direction, when piercing a billet by ...  
JP2007526133A  
JP2007222946A
To improve thickness deviation which is generated due to a fluctuation in piercing efficiency. In a control method for rolling a seamless tube, rolling of the tube is performed while opening and closing bar steadiers provided at an outle...  
JP2007160331A
To provide a barrel type piercer roll for preventing occurrence of any inner surface flaw.In piercing a hole in a billet by using a barrel type piercer roll, in the barrel type piercer roll for preventing the occurrence of any inner surf...  
JP3959667B2
To manufacture a high-strength steel pipe which restrains inner flaws from being caused and which is excellent in resistance to sulfide, stress and corrosion cracking. Seemless pipes are manufactured by the direct hot rolling of billets ...  
JP3921808B2
To provide a method for producing a martensitic stainless steel tube having high strength of >650 MPa yield stress and having excellent low temp. toughness. Martensitic stainless steel having a compsn. contg., by weight, 0.15 to 0.22% C,...  
JP3921809B2
To provide a method of manufacturing a martensitic stainless steel tube having high strength of which the yield stress exceeds 650 MPa and also having excellent toughness at a low temperature. After martensitic stainless steel which has ...  
JP2006341299A
To provide a method of manufacturing ultra thin wall metallic tube by a cold stretching method by which the manufacturable range of the thin wall side of a seamless metallic pipe or a welded metallic pipe can be greatly expanded.This met...  
JP2006326652A
To provide a manufacturing method of a very thin wall seamless metal pipe by a cold-rolling process using an inclined rolling method, which manufacturing method can remarkably extend the manufacturable range of the seamless metal pipe to...  
JP2006315054A
To propose a push bench mill adopting a rotary roller die and also to propose a tandem rolling method using an inclined rolling mill.In a hot-manufacturing process of a seamless metallic tube adopting the push bench mill as an elongator,...  
JP2006297457A
To provide a method for measuring the outside diameter of a seamless steel tube capable of obtaining the highly reliable measurement value even when the temperature at the measurement is changed.In the method for measuring the outside di...  
JP2006297428A
To provide a reeler plug having high durability and satisfying the quality at the inside face of the material to be rolled in a tube polishing stage according to a Mannesmann plug mill rolling process as one of seamless steel tube produc...  
JP2006297400A
To provide a piercing method in the manufacture of a seamless steel tube having no flaw on the inner and outer surfaces.In the piercing method of the seamless steel tube in a manufacturing method of the seamless steel tube, the generatio...  
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...  

Matches 251 - 300 out of 2,078