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Matches 351 - 400 out of 2,145

Document Document Title
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...  
JPWO2004108310A1
ロール径をあまり細くすることなしに回転鍛 造効果を抑制し、附加剪断変形を抑制できる 継目無管製造時の穿孔圧延方法である。この 方法は、主ロールの傾斜角βと、同主ロ...  
JPWO2004112977A1
内面性状の良好なオーステナイト系ステンレ ス鋼穿孔素管を提供し、健全なステンレス鋼 管製継目無鋼管を工業的規模で量産できる手 段を確立する。P量:0.040%以下...  
JPWO2004103593A1
本発明の継目無管の製造方法によれば、ロー ル径比Dg/Dlの範囲に応じて、次の(1 )式〜(3)式のいずれかを満足することに より、噛み込み不良等のミスロールを発...  
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...  
JPWO2004071686A1
マンネスマン製管法によって熱間仕上げされ た鋼管に簡易な内面切削加工と、その後の冷 間抽伸を施すことによって、鋼管内表面を形 成する凹凸形状の凹部深さdと、表面粗...  
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...  
JPWO2004052569A1
本発明は、傾斜ロール式の穿孔圧延機による 継目無金属管の穿孔圧延方法に関し、ビレッ トの噛み込み不良を生じさせることなく、マ ンネスマン破壊と円周方向剪断歪を大幅...  
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...  
JPWO2006003953A
C<=0.04%, Si<=0.50%, Mn: 0.01*6.0%, P<=0.03%, S<=0.01%, Cr: 20*30%, nickel: 30*45%, Mo: 0*10%, W:0*20%, however less than Mo (%) +0.5W (%) :1.5% more than 10%Cu: 0.01*1.5%, aluminum<=0.01%, and N:0.0005*0.20% are included, The remainder ...  
JPWO2006003954A
C<=0.04%, Si<=0.50%, Mn: 0.01*6.0%, P<=0.03%, S<=0.01%, Cr: 15*30%, nickel: More than 45% of 60% or less, Mo: 0*18%, W:0*36%, however less than Mo (%) +0.5W (%) :1.5% more than 18%Cu: 0.01*1.5%, aluminum<=0.01%, and N:0.0005*0.20% are in...  
JPWO2005115650A
While Cr is included 10.50*14.00% with mass %, it is considering the symbol of an element as content in steel in mass % of each ingredient element, About a round billet whose value denoted by a formula of "Cr+4Si* (22C+0.5Mn+1.5nickel+30...  
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...  
JPWO2005092531A
The present invention is a manufacturing method of a pipe which includes a process of carrying out diameter rolling of constant of the pipe, using a constant path rolling mill which consists of a plurality of stands which equipped each s...  
JPWO2005087401A
It is a plug used for the plug front part and the rear which were divided holding as a plug of one, The front part at least is a manufacturing method of a joint non-pipe which consists of low alloy steel, uses as a perforating tool a plu...  
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...  
JPWO2005068098A
A carburization phenomenon which occurs in a manufacturing process of a pipe is prevented, and it is a manufacturing method of a joint non-pipe which rationalized like an extension roll turner. After rolling without [after punching by pu...  
JPWO2005061137A
In a punching rolling mill, a manufacture device of a joint non-pipe provided with a lubricant supply system required in order to manufacture an efficient quality joint non-pipe, and the distribution system, and a manufacturing method of...  
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  
JPWO2004112977A
A good interiority-like austenitic-stainless-steel punching element tube is provided, and the means which can mass-produce the healthy seamless steel tubes made from a stainless steel pipe on an industrial scale is established. The amoun...  
JPWO2004108310A
It is a punching rolling method at the time of the joint non-pipe manufacture which inhibits the rotation forge effect, without making the diameter of a roll not much thin, and can control addition shear deformation. This method holds an...  
JP3598771B2  
JPWO2004103593A
According to the manufacturing method of the joint non-pipe of the present invention, according to the range of diameter ratio Dg/Dl of a roll, either of the following (1) type * (3) types is satisfied, Also in the top part or subsequent...  

Matches 351 - 400 out of 2,145