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Matches 1 - 50 out of 1,579

Document Document Title
WO/2023/228783A1
Provided is a martensitic stainless steel material having high strength and excellent corrosion resistance in corrosive environments containing SOx or NOx. This martensitic stainless steel material satisfies the chemical composition desc...  
WO/2023/228784A1
Provided is a martensitic stainless steel material which has high strength and excellent corrosion resistance in a corrosive environment in which SOx and NOx are included. A martensitic stainless steel material according to the present d...  
WO/2023/280454A1
The present invention relates to a method for producing an angular contact bearing cage from a sleeve-like blank (1, 1'). In order to considerably reduce the manufacturing costs compared with the known solutions even for small series, th...  
WO/2022/152558A1
The invention relates to a roll stand (1) for rolling an elongated workpiece, preferably in a cross-rolling mill, said roll stand (1) having: two working rollers (20) which form a rolling gap (S) and which are designed to roll the workpi...  
WO/2022/112607A1
A steel composition, in particular for manufacturing a wrought steel article, in particular a seamless pressure vessel, such as a bottle or large cylinder for storage and/or transportation of compressed gas, particularly hydrogen, compri...  
WO/2022/038956A1
Provided are a seamless steel pipe and a method for manufacturing the same with which it is possible to improve fatigue life characteristics and suppress, even when performing cold working (cold drawing), occurrence of problems during th...  
WO/2021/239148A1
A method for rapidly measuring a roller pass major semi-axis of a three-roller reducing mill, the method comprising the following steps: selecting a corresponding value of the average diameter of an elliptical pass, a value (a) of a firs...  
WO/2021/227921A1
A high-strength anti-collapse oil casing and a manufacturing method therefor. The high-strength anti-collapse oil casing comprises the following chemical elements in percentage by mass: 0.08%-0.18% of C; 0.1%-0.4% of Si; 0.1%-0.28% of Mn...  
WO/2021/220653A1
Provided is inclined rolling equipment with which a defect in the shape of an unsteady portion at the distal and proximal ends of a seamless tube blank can be prevented. This inclined rolling equipment is provided with an inclined pier...  
WO/2021/171826A1
Provided are a seamless tube having excellent pressure-resistance performance, and a method for manufacturing the same. This seamless tube has therein a thin-walled part that is thin in the tube circumferential direction and is formed ...  
WO/2021/157251A1
The purpose of the present invention is to provide: a seamless stainless steel pipe that has exceptional corrosion resistance and high pipe-axial-direction tensile yield strength, the seamless stainless steel pipe being such that the dif...  
WO/2021/145027A1
The manufacturing method of the present disclosure is for manufacturing, using a three-roll inclined rolling machine, a first seamless metal tube having a first thickness and a second seamless metal tube having a second thickness that di...  
WO/2021/100327A1
The objective of the present invention is to perform diameter reduction rolling of large-diameter to small-diameter rolling stock, with high external diameter dimensional accuracy. Provided is a rolling mill in which three or more rollin...  
WO/2020/224758A1
A non-destructive method for determination of twist angle of an outlet product during rolling of an inlet product into said outlet product, comprising the steps of measuring a rotational inlet speed of the inlet product during said rolli...  
WO/2020/217725A1
Provided is a rolling-straightening machine with which outer-diameter reduction rolling and straightening-rolling of a pipe material or bar material can be carried out rapidly and precisely. This rolling-straightening machine 1 is equi...  
WO/2020/150715A1
A tubular structure is disclosed. The tubular structure has a first sheet metal having a machine direction. The first sheet metal is convolutely wound about a longitudinal axis and has a tail portion. The tail portion of the first sheet ...  
WO/2019/206958A1
The invention relates to a cross-rolling mill (11) for rolling a block over a mandrel so as to form a hollow block, comprising a plurality of working rollers (1, 2), each of which exerts a substantially radially aligned rolling force ont...  
WO/2019/197664A1
The invention relates to a lubrication ring for a mechanical expander (1) for calibrating large pipes, comprising a conventionally produced ring (12) made of a steel, in particular construction steel, wherein fluid bores are provided in ...  
WO/2019/144584A1
A method for preparing a 1Cr25Ti high-chromium ferrite stainless steel seamless pipe, comprising steps of tube blank heating, punching, finishing, cold drawing, thermal treatment, refinishing, and finished tube inspection, wherein cold d...  
WO/2019/107409A1
Provided is a method for manufacturing a seamless steel tube, whereby coarsening of crystal grains can be suppressed in a boring machine. The method for manufacturing a seamless steel tube according to the present embodiment is provided ...  
WO/2019/107418A1
Provided is a piercing machine capable of suppressing the temperature difference between a front end section and a rear end section of a hollow element tube following piercing/rolling or stretching/rolling. A piercing machine (10) is pro...  
WO/2019/107443A1
Provided is a piercing machine capable of suppressing the temperature difference between a front end section and a rear end section of a hollow element tube following piercing/rolling or stretching/rolling. A mandrel bar (3) of a piercin...  
WO/2019/092946A1
Provided is an inclined rolling mill with which adequate working space for ancillary equipment changeover work and installation space for ancillary equipment can be provided. An inclined rolling mill (1) includes a plurality of inclined ...  
WO/2019/047624A1
Provided is a preparation method of a 1Cr17 ferritic stainless steel pipe. The method comprises the following steps: preheating a 1Cr17 ferritic stainless steel pipe billet and keeping at the temperature; perforation to obtain a hot-roll...  
WO/2018/230450A1
A method for producing a seamless metal tube comprises: a step for preparing a billet (2) having a diameter (B); a step for heating the billet (2); a step for forming a hole (7) having four grooves (8) that extend in the axial direction ...  
WO/2018/099403A1
A metal stock rolling processing module, apparatus and production line thereof, and method of rolling feeding, diameter reduction, alignment, roundness correction or derusting processing employing the metal stock rolling processing modul...  
WO/2018/083028A1
The invention relates to a seamlessly produced tube of a medium manganese steel, comprising a TRIP and/or TWIP effect during deforming, with the following chemical composition in % by weight: C: 0.0005 to 0.9; Mn: 4 to 10; Al: 0.01 to 10...  
WO/2018/083029A1
The invention relates to a seamlessly produced and semi-hot-formed pipe made of a medium manganese steel, having a TRIP and/or TWIP effect during deformation, having the following chemical composition in wt%: C: 0.0005 to 0.9, Mn: 4 to 1...  
WO/2018/069303A1
The invention relates to a cross-rolling mill, comprising a plurality of roll shafts (1), each of which exerts essentially radially directed rolling force onto a workpiece, wherein the orientation of a roll axis (W) of at least one of th...  
WO/2017/200033A1
Provided is a seamless steel pipe which has excellent SSC resistance, while being suppressed in strength variation in the circumferential direction and in the axial direction. A seamless steel pipe according to one embodiment of the pres...  
WO/2017/134186A1
A method for producing a tube of a stainless steel alloy tube which comprises the steps of hot working a stainless steel casting into a pretubular shaped workpiece or into a cylindrical bar, trepanning the cylindrical bar or machining an...  
WO/2017/096549A1
A light metal alloy seamless pipe material punching machine, comprising: a machine body (1), a master cylinder (2), a positioning cylinder (3), a waste pushing cylinder (4), a punching pin (5), a guide plate (6), an upper positioning pla...  
WO/2016/128923A1
A rolling stand with two rolling rolls 3, 4 with skew axes comprises two rotatable turrets 10, 11 which may be put into rotation by motors 40, 40' and can be blocked in a fixed position, on which both fixed lateral guides 6, 7 and rotata...  
WO/2016/103624A1
Provided is an electric resistance welded steel pipe that has high strength, high toughness, and excellent post-welding heat treatment resistance. A hot-rolled steel sheet comprising the following is used as a starting material: a compos...  
WO/2016/084298A1
Provided are a device array for manufacturing a seamless steel pipe or tube and a method for manufacturing a high-strength duplex stainless steel seamless pipe or tube for oil wells with superior low-temperature toughness. The device arr...  
WO/2016/071423A1
Disclosed is a hot forming tool (1) which consists of a main tool member (2) having an at least partial surface coating (4) and which can be obtained by providing the main tool member with a raised metal relief that is then entirely or p...  
WO/2016/016751A1
The present invention relates to a compact plant (10) for rolling a seamless tube. The plant comprises a rotary piercer (20) which defines a rolling axis XPR and is designed to pierce a billet (11) pressed against a plug (22) mounted on ...  
WO/2016/016750A1
The present invention relates to a plant (10) for rolling a seamless tube. The plant comprises a rotary piercer (20) which is designed to pierce a billet (11) pressed against a plug (22) mounted on a rod so as to obtain a pierced blank (...  
WO/2015/141211A1
A 4-roll skew rolling mill, which is configured from large-diameter cone-type main rolls (1, 1') disposed either to the left and right of each other or above and below each other, so as to face each other with a pass line (X-X) therebetw...  
WO/2015/011917A1
Provided is a low-alloy steel pipe for an oil well that has a yield stress of 965 MPa (140 ksi) or higher and that makes it possible to stably obtain excellent SSC resistance. The low-alloy steel pipe for an oil well is provided with a s...  
WO/2014/112865A1
A method of producing a unitary pipe having a combination of square and circular cross sections comprising the steps of securely clamping a workpiece (10) or a pipe having a square cross section to a workpiece grip of a lathe machine; sp...  
WO/2014/109180A1
A plug for hot pipe manufacturing, provided with: a main plug body; a build-up layer formed on the surface of the main plug body around the axis of the main plug body; and a sprayed coating formed on the surface of the build-up layer.  
WO/2014/067514A1
The invention relates to a method for producing seamless steel pipes in a rolling train having one or more longitudinal or transverse roll stands arranged one behind the other and an internal tool that is used as a piercing mandrel or ro...  
WO/2014/048670A1
The invention relates to a method for producing a tube (2) or tubular pre-product from a solid billet in a rolling mill, comprising at least one roll (5a, 5b) acting from the outside on the solid billet or tubular pre-product and a mandr...  
WO/2014/045140A2
The invention relates to a pipe rolling plant 10 comprising a rotary piercer 20, a treatment station 30 and a main rolling mill 40. The rotary piercer and the treatment station are arranged so that the pierced blank 51 leaving them is ar...  
WO/2014/030593A1
This plug for hot pipe manufacturing is provided with the following: a plurality of plug pieces that can be attached to and detached from each other; and a joining member that magnetically joins the plug pieces together. One of the plug ...  
WO/2014/030692A1
This inner-surface control tool is provided with a mandrel, a plug that is removably joined to said mandrel, and a joining member that magnetically joins the plug and the mandrel to each other. Either the plug or the mandrel has a column...  
WO/2013/183213A1
This manufacturing method for a piercing plug used in a piercing mill for manufacturing a seamless steel pipe includes a shot blasting step wherein shot blasting is applied to the plug surface and an arc spraying step wherein a thermal s...  
WO/2013/161175A1
This method for producing a plug used in a piercing mill used in the production of a seamless steel pipe includes: a shot blasting step for shot blasting the surface of a plug; and an arc spray step for forming a coating film by arc spra...  
WO/2013/161177A1
This facility for producing a plug used in a piercing mill used in the production of a seamless steel pipe is provided with: a shot blasting device that shot blasts the surface of a plug; and an arc spraying device that arc sprays an iro...  

Matches 1 - 50 out of 1,579