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Matches 251 - 300 out of 2,180

Document Document Title
JP4692511B2  
JP4687182B2  
JP2011098354A
To provide a method for sufficiently suppressing the variation of quality in the longitudinal direction of a product since the material temperature (working temperature), when performing stretch rolling while restraining the inner surfac...  
JP4682432B2  
JP4661869B2  
JP4655768B2  
JP4650747B2  
JP4624514B2  
JP4623212B2  
JP4617602B2  
JP4615432B2  
JP4610555B2  
JP4609372B2  
JP4603707B2  
JP4597695B2  
JP4586921B2  
JP4569317B2  
JP2010227999A
To provide a plug which enables flaws on the internal surface of a hollow tube stock formed by piercing/rolling to be prevented, and can be produced without requiring long production time and has the prolonged life.The plug 2 includes: a...  
JP4543684B2  
JP4538917B2  
JPWO2008142803A1
【課題】スキュー角度δを大きくして拡管比 上げても、材料のピーリングの発生を防止 きる継目無管の穿孔圧延方法及び装置を提 する。【解決手段】パスライン周りに...  
JP4517811B2  
JP4513807B2  
JPWO2008126427A1
穿孔機10は、複数の傾斜ロール1と、プラ グ2と、プッシャ4と、ガイドロール6とを 備える。プッシャ4は、少なくとも丸ビレッ ト20が傾斜ロール1に接触してから所...  
JP4506563B2  
JP2010521317A
According to [the present invention relates to a rolling mill provided with a planet type inclination roll rolling mill (20) and another rolling mill which follows the planet type inclination roll rolling mill (20) in the rolling directi...  
JP4487847B2  
JP2010125492A
To provide a piercing rolling method for a billet by which the occurrence of scratches on the inner surface at a distal end part of a seamless steel tube is prevented advantageously. In the piercing rolling method for a billet performing...  
JP2010125493A
To provide a piercing rolling method for a billet by which the occurrence of scratches on the inner surface at a distal end part of a seamless steel tube is prevented advantageously. In the piercing rolling method for a billet performing...  
JP2010125494A
To provide a piercing rolling method for a billet by which scratches on the inner surface at a distal end part of a material to be rolled hardly occurs in piercing rolling a billet (seamless steel tube base stock) by means of a piercer s...  
JP4475429B2
A Ni base alloy pipe stock having a chemical composition comprising, by mass %, C ‰ 0.04%, Si €  
JP4471134B2  
JPWO2008096708A1
所定の形状のプラグ素材を準備し、準備され た前記プラグ素材を1.0vol%以上の酸 素を含む熱処理雰囲気中で950℃以上10 50℃未満の熱処理温度で熱処理し、表...  
JP4462265B2  
JP4453278B2  
JP4453082B2  
JP4449908B2  
JP4438960B2  
JP2010005679A
To provide the top shape of a punch in which the point angle of the punch of a centering punch device in an Assel mill and the point angle of a reproducing plug are taken as within the same range.In a clamping device for clamping the nos...  
JPWO2008020510A1
噛み込み時の非定常域での回転鍛造回数及び 剪断変形を抑制し、中空素管のトップ部の回 転鍛造効果及び/又は剪断変形に起因する内 面疵の発生を防止し、中空素管のトップ...  
JP4371247B2  
JP4359783B2  
JP4356168B2  
JP4352997B2  
JP2009241075A
To provide a manufacturing method for a high-alloy seamless steel pipe, which inhibits fin flaws generated in manufacturing a high-alloy seamless steel pipe by piercing.A high-alloy steel billet heated to a temperature range of 900-1,250...  
JPWO2009122620A
A hole (30) is formed in the central part of the rear end face (20) of a round billet (10). A hole (30) has the predetermined depth from a rear end face (20), and has a plurality of slots (31) on the side. Each slot (31) extends in a dep...  
JPWO2009119245A
It is the method of carrying out punching rolling of the piece of a round bar heated at 1250 ℃ or less by ピアサ which allotted the plug along with the pass line between a pair of inclination rolls by which countering allocation was...  
JP4337504B2  
JPWO2007116821A1
ビレットをプッシャとプラグとの間のパスラ イン上に配置し、ビレットを前進させ複数の 傾斜ロールの間に噛み込ませる。少なくとも 、噛み込まれたビレットがプラグに接触...  
JP4314458B2  

Matches 251 - 300 out of 2,180