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Matches 301 - 350 out of 2,165

Document Document Title
JP4259347B2  
JP2009082988A
To provide a pierced tube shell of an austenitic stainless steel having a good inner surface condition and to establish a means with which can perform mass production on an industrial scale of a good quality seamless steel pipe of stainl...  
JP4255991B2  
JP2009066644A
To provide a piercer boring method of a hard-to-work material capable of preventing generation of inner flaw when performing the piercer boring of the hard-to-work material.In the piercer boring method for manufacturing a seamless steel ...  
JP4238744B2  
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...  
JPWO2006134957A1
本発明の穿孔機に使用されるプラグ2は、先 端部23と、円柱部24と、胴部25と、芯 金結合部22と、噴射孔21とを備える。噴 射孔21は、円柱部24の表面から芯金...  
JP4200829B2  
JP4196991B2  
JP2008543569A
The present invention with 2 roll inclination rolling mill equipped with the punching mandrel currently held between the rolls inclined while having and carrying out one rolling part and at least one reeling part, With 3 roll inclination...  
JPWO2008142803A
[Subject] Even if the degree delta of skew angle is enlarged and it raises an expansion ratio, a punching rolling method and a device of a joint non-pipe which can prevent generating of peeling of material are provided. [Means for Soluti...  
JPWO2008126427A
Boring machine 10 is provided with the following. A plurality of inclination rolls 1, Plug 2, Pusher 4, Guide roll 6. Pusher 4 pushes round billet 20 from the back end after round billet 20 contacts inclination roll 1 at least until it m...  
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  
JPWO2006106802A1
穿孔圧延工程を含む継目無管の製造方法であ って、ビレットの直径をR(m)、ビレットの軸 部割れ長さをr(m)、前記ビレットが圧延ロー に接触してから穿孔プラグに達するま...  
JPWO2006106637A1
第一成分として無機成分、第二成分として水 酸化ナトリウム、第三成分として水溶性樹脂 類および/または水溶性界面活性剤、および 水を有する焼付き防止剤であって、第一...  
JP4145764B2  
JPWO2008096708A
The plug material of predetermined shape is prepared, the prepared above-mentioned plug material is heat-treated in the heat treatment atmosphere containing oxygen beyond 1.0vol% with 950 ℃ or more the heat treatment temperature below ...  
JP2008531286A
The present invention is a method for supervising the processing process for manufacturing a hot-working pipe, and relates to that by which a hollow matter pipe is manufactured with an inclination boring machine using the internal tool c...  
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  
JPWO2006003953A1
C≦0.04%、Si≦0.50%、Mn:0.01〜6.0%、P≦0.03 、S≦0.01%、Cr:20〜30%、Ni:30〜45%、Mo:0 〜10%、W:0〜20%、但し、Mo(%)+0.5W(% ):1.5%超10%以下、Cu:0.01〜1.5%、Al...  
JPWO2006003954A1
C≦0.04%、Si≦0.50%、Mn:0.01〜6.0%、P≦0.03 、S≦0.01%、Cr:15〜30%、Ni:45%超60%以下 、Mo:0〜18%、W:0〜36%、但し、Mo(%)+0 .5W(%):1.5%超18%以下、Cu:0.01〜1.5...  
JPWO2005123289A1
マンドレルミルによる延伸圧延時の摩擦係数 を低くし、管の内面疵の発生を少なくするこ とのできる継目無鋼管の製造方法である。中 空素管を延伸圧延する際に、マンドレル...  
JPWO2005115650A1
質量%で、Crを10.50〜14.00% 含むとともに、元素記号を各成分元素の質量 %での鋼中含有量として、「Cr+4Si− (22C+0.5Mn+1.5Ni+3...  
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  
JPWO2008020510A
It bites, the number of times of a rotation forge and shear deformation in an unsteady region at the time of a lump are controlled, and generating of the inside crack resulting from the rotation forge effect and/or shear deformation of t...  
JP4045813B2  
JPWO2005092531A1
本発明は、各スタンドに複数の孔型圧延ロー ルを備えた複数のスタンドからなる定径圧延 装置を用いて管を定径圧延する工程を含む管 の製造方法であって、前記各スタンドに...  
JPWO2005087401A1
分割されたプラグ前部と同後部を一体のプラ グとして保持して使用されるプラグであって 、少なくとも前部は低合金鋼からなり、前部 および後部の表面に酸化皮膜が形成され...  
JP2007537874A
It is equipment for reduction of a path of the pipe by rolling, or the tubular material 7, circular-izing, or straight-line-izing, Are the roller 3 with cylindrical plurality of a long and thin parallel cylindrical array which vacates re...  
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  
JPWO2007116821A
A billet is arranged on the pass line between a pusher and a plug, a billet is advanced, and it is made to bite among a plurality of inclination rolls. After the bit billet contacts a plug at least until punching rolling results in a sta...  
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 ...  

Matches 301 - 350 out of 2,165