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Matches 351 - 400 out of 3,359

Document Document Title
WO/2001/066807A1
The invention relates to a method for reinforcing a tank wall, which method comprises the steps of: providing a tank with a steel tank wall defining an interior space; providing a reinforcing pressure in said interior space, which reinfo...  
WO/2001/064397A2
The present invention is a novel method of reducing tensile zones in the surface of a part comprising the steps of selecting a region of the part to be treated and programming a control unit (132) of a burnishing apparatus (100) to perfo...  
WO/2001/064398A2
The burnishing method and apparatus for implementing the method of the present invention utilizes a burnishing process to provide deep compression with a minimal amount of cold working and surface hardening. In particular, the method of ...  
WO/2001/058617A1
A compound indenter (18) for metal coldwork, and a method of employing such tooling. The compound indenter tool (18) is used to produce deformation in a workpiece structure (30), to provide a selected beneficial residual stress profile i...  
WO/2001/049887A1
The invention relates to iron metallurgy and more specifically to a modification of the physical properties of steel with the aid of deformation, including hot deformation. The invention can be used for plastic processing of blanks and a...  
WO/2001/040525A2
A method of making high-strength steel structural members is disclosed by providing a flat-rolled blank of high strength steel having a ferrite-pearlite microstructure and high-strength mechanical properties and cold forming the blank by...  
WO/2001/038693A1
A device (1) for expanding a pipe comprising a bi-conical sleeve (3) having a first section (5) and a second section (11), which sections (5, 11) are provided with at least two longitudinal guide channels (20), first wedges (25), wherein...  
WO/2001/036699A1
A composition and method for the manufacture of products of a precipitation hardenable martensitic stainless steel, the composition of which comprises at least 0.5 % by weight of Cr and at least 0.5 % by weight of Mo wherein the sum of C...  
WO/2001/036692A1
The invention concerns a method for ultrasonic shot blasting of large-dimensioned annular surfaces (5) on thin workpieces (1). Said method is characterised in that the surface to be shot blasted (5) performs at least N = five revolutions...  
WO/2001/031071A1
An innovative combination of powder metallurgy and hot working steps have allowed for optimization of the processing route for extruded powder metallurgical iron aluminide that is produced from both water atomization and gas atomized pow...  
WO/2001/016390A1
A law material for bearing parts which comprises a steel having been hardened by heat treatments and has a surface layer part to be subjected to shot peening treatment having tempered martensite structure, characterized in that the tempe...  
WO/2001/010578A1
A hot finish-rolling method for bar steel, which can improve a dimension accuracy and uniformize its structure, and which uses a 2-stand/3-roll finishing mill, wherein a final-finish-pass reduction of area is 10 to 20 % and a final-finis...  
WO/2000/075381A1
Spring steel having a hardness expressed by a Brinell ball indentation diameter of at least 2.7 mm is kept insulated at 150 to 350°C, and is subjected to warm stress peening with a stress given to the spring steel at the above temperature.  
WO/2000/062956A1
Axisymmetric deformations with a high deformation degree can be obtained by performing lateral extrusion on a partially heated metal workpiece (1000). The hardness obtained as a result of simultaneous cold and hot deformation makes it po...  
WO/2000/058043A1
Blank for a gun barrel, consisting of a steel bar, which bar, in one or more hot working steps, has been repeatedly wrung about its own longitudinal axis.  
WO/2000/056944A1
A first embodiment of the inventive maraging steel which has an essential composition: C: 0.01 % or less, Ni: 8 to 19 %, Co: 8 to 20 %, Mo: 2 to 9 %, Ti: 0.1 to 2 %, Al: 0.15 % or less, N: 0.003 % or less, O: 0.0015 % or less, balance: F...  
WO/2000/050781A1
A rolling element capable of increasing an anti-rolling fatigue while its hardness is maintained by improving the combination of a mechanical surface hardening of the rolling element to the surface rolling element and heat treatment; a r...  
WO/2000/049186A1
A surface treatment method for manufacturing springs of excellent fatigue resisting characteristics, comprising: projecting hard metal particles 500-900 $g(m) in particle diameter which are softer than a nitrided outermost layer of a spr...  
WO/2000/048760A1
A multi-stage forming tool (10) for densifying the outer perimeter of post-sintered powder metal preforms (36) includes a series of axially spaced die plates (12) having different size die openings (14) arranged from largest to smallest....  
WO/2000/047354A1
A metallic alloy composition is manufactured into products such as press formed or stamped products or rolled products such as sheet, strip, rod, wire or band by one or more cold working steps with intermediate or final flash annealing. ...  
WO/2000/043556A1
The invention concerns a treatment method which consists in coating at least one surface of a brittle thin metal strip (1) with a coating film (3, 3') comprising at least a polymer material, to obtain on the strip an adhering coat with a...  
WO/2000/042227A1
A surface refining method for metal parts or the like, suitable for machining industries where surface refining (improving residual stress to compression, improving fatigue strength and work effect) is made by shot peening and for fields...  
WO/2000/031309A1
A method of recycling swarf into shot for use in shot blasting machines is disclosed. Swarf, especially swarf composed of engineering steel, is separated from large objects in a trommel [10] and is cleaned of contaminants. Oil and water ...  
WO/2000/026427A1
The invention relates to a steel with a high wear resistance, high hardness and good notched bar impact strength, useful for the manufacture of products, in the use of which at least some of said features are desirable, preferably for th...  
WO/2000/020170A1
The burnishing method and apparatus (100) for implementing the method of the present invention utilizes a single-point burnishing process to provide deep compression with a minimal amount of cold working and surface hardening. In particu...  
WO/2000/018973A1
This method refers to a method by which the physical and mechanical properties intrinsic to a fine-grain structure may be formed in metal billets using pressure treatment. The method is designed to treat rods, bars and other particularly...  
WO/2000/006789A1
A high-strength, high-toughness rolled shape steel of 590 Mpa class used for building structural members and a method of producing the high-tension rolled shape steel. The shape steel has mechanical characteristics including a tensile st...  
WO/1999/057328A2
The present invention relates to a process for heat forging martensitic stainless steels with very high carbon content, between 1.2 and 2.1 % by mass of said element and chromium in excess of 12 % by mass, in order to produce infibered s...  
WO/1999/054513A1
An austenitic rounding fixture (2) is inserted into the horizontal joint of a turbine casing (6). The casing (6) is then assembled and stress relief cycle is carried out, resulting in rerounding of the casing and relief of residual stres...  
WO/1999/049096A1
An apparatus is disclosed for carrying out a method whereby parts (18) are treated in a fluidized bed created within an enclosure (10) that provides for movement of a generally upwardly through the enclosure, and where the parts (18) are...  
WO/1999/047303A1
Tooling and a method of employing tooling (90, 130) to produce beneficial stress waves in a substrate (132) to provide high fatigue life structures. Stress waves (159, 152) are provided to work a substrate, causing dimples (170) in the w...  
WO/1999/028070A1
A method of densifying a sintered powder metal article (2) by point contact (12).  
WO/1999/024630A1
A steel wire which has a perlite structure containing 0.8-1.0 mass% carbon and 0.8-1.5 mass% silicon and has such a hardness distribution that a surface layer ranging from the surface to a depth of 100 $g(m)m from the surface has an aver...  
WO/1999/016561A1
A pneumatic isostatic forging process for densification of near net shape workpieces is disclosed. A workpiece (22) is heated prior to the forging process, such as from a previous processing step (14). The workpieces is loaded into a pre...  
WO/1999/015303A1
The invention relates to a rolling device for generating pressured internal stress in a chamfer (5) running along the wall (2) of a material recess (3) in a component (4), comprising at least one carrier (7) which can move along said cha...  
WO/1999/014383A1
High strength steel structural members and a method of making same are disclosed by providing high-strength steel material having a specific chemical composition and preferably a tensile strength of at least about 120,000 psi and a yield...  
WO/1999/011836A1
A steel wire of pearlite texture containing 0.8-1.0 mass % of C and 0.8-1.5 mass % of Si, wherein an average hardness of a cross-sectionally outer portion thereof the depth of which is up to 100 $g(m)m measured from an outer surface ther...  
WO/1999/007497A1
A full enclosed die forging method conducted by using a forging materiel which comprises crystal grains of different phases and has a recrystallization temperature of T1 and a melting point of T2. The method comprises enclosing the mater...  
WO/1999/006735A1
A generally disc-shaped flywheel (10) which is an integral one-piece forged structure formed by forging of a carbon steel blank (24, 26) and consisting of an inner portion (14) having a friction surface (19) and an outer ring gear portio...  
WO/1999/002747A1
High strength steel is produced by a first rolling of a steel composition, reheated above 1100 °C, above the austenite recrystallization, a second rolling below the austenite recrystallization temperature, water cooling from above AR to...  
WO/1998/055659A1
The present invention relates to a process for the hot forging of steel with a very high carbon content, from 1.4 and 2.1 % by mass of said element, for the fabrication of cutting weapons. The process comprises four steps: 1) hot forging...  
WO/1998/027242A1
High bearing-strength steel parts useful for strengthening and downsizing parts which are to undergo rolling and sliding and therefore required to have high rolling strength and wear resistance, for example, gear, cam or bearing parts; a...  
WO/1998/026910A1
The invention relates to a method for increasing the solidity of surfaces of workpieces manufactured from hard brittle materials. The invention is characterized in that narrowly defined surface areas of the workpiece are brought into con...  
WO/1998/003686A1
A process for producing a shaped metallic article includes the steps of melting a metal alloy, reducing the temperature of the molten metal to the liquidus temperature, casting the molten metal at the liquidus temperature into a mould an...  
WO/1998/000626A1
A tubing (4) made of a formable steel grade which is subject to strain hardening without incurring any necking or ductile fracturing as a result of the expansion process is expanded by moving an expansion mandrel (5) having a non-metalli...  
WO/1998/000569A1
Steel which has an excellent outer surface SCC resistance for pipelines without deteriorating fundamental requirements as the pipeline material. The surface smoothness of the steel is so controlled as to have a centerline average roughne...  
WO/1997/047418A1
The present invention concerns compacted and optionally presintered bodies, which are prepared from metal powders and which have densified surfaces, obtained by shot peening or rolling.  
WO/1997/045228A1
The track section (10) consists of two part-tracks (12, 14, 16) formed of various materials welded together using an intermediate element (18, 20), in particular a switch piece, such as a common crossing, with connecting rails manufactur...  
WO/1997/042351A1
A method of making a sintered article of powder metal having a carbon composition in the range of about 0.8 % to 2.0 % by weight, then shperoidizing the sintered article and then warm forming the sintered article at a temperature between...  
WO/1997/041266A1
A method of laser shock peening a metallic part (8) by firing a laser (2) on a laser shock peening surface (54) of the part which has been adhesively covered by tape (59) having an ablative medium, preferably, a self-adhering tape with a...  

Matches 351 - 400 out of 3,359