Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
  • B22F3/12—Both compacting and sintering
  • B22F3/1208—Containers or coating used therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
  • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
  • B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
  • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
  • B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
  • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
  • F41A21/02—Composite barrels, i.e. barrels having multiple layers, e.g. of different materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/12—All metal or with adjacent metals
  • Y10T428/12014—All metal or with adjacent metals having metal particles
  • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
  • Y10T428/12063—Nonparticulate metal component
  • Y10T428/12097—Nonparticulate component encloses particles

Definitions

• the invention relates to a method for producing gun barrels, which have a core barrel and at least one jacket barrel made of different metallic materials.
• Gun barrels are subject to two completely different stresses: on the one hand, the explosion of the propellant charge of a projectile creates a high pressure inside the barrel, which the gun barrel must be able to withstand, and on the other hand the projectile is driven through the barrel at high speed, thereby stabilizing the bullet trajectory the projectile is rotated by the cables in the gun barrel, which creates an extreme abrasive load on the barrel interior.
• these two loads place different demands on the material.
• One way to meet these different requirements is to provide a correspondingly large dimensioning of the weapon barrel, which means that the mobility of the weapons suffers and an extremely high amount of material is required.
• a method for the manufacture of gun barrels has already become known, wherein a core tube is fitted into a tubular casing.
• the disadvantage of this method is that particularly precise machining of both the inner hollow of the casing tube and the outer casing of the core tube is required.
• damage to the inner tube such as that caused by cracks, which can be attributed to the pressure load, a significant change in the caliber can occur, which can result in the gun barrel being destroyed by a projectile.
• the present invention has set itself the goal of providing a method for producing gun barrels that are suitable for guns as well as handguns and handguns that have a core barrel and at least one jacket barrel made of different metallic materials, which allows a to produce a particularly light and resistant weapon barrel.
• the method according to the invention for the manufacture of weapon tubes which have a core tube and at least one jacket tube made of different metallic materials, consists essentially in the fact that in a sleeve tube, which is optionally arranged in a capsule tube, made of a tough alloy, e.g.
• a weapon barrel manufactured according to this method has the advantage that it takes into account both the high pressure and the abrasive stresses in a particularly favorable manner, a particularly advantageous combination of a melt metallurgical
• the central hollow area is filled with a filler, preferably made of an easily machinable material, e.g. Free cutting steel, so an unnecessary loss of the complex metal powder can be saved, while at the same time particularly easy mechanical processing can take place.
• a filler preferably made of an easily machinable material, e.g. Free cutting steel
• the manipulation can be very easily carried out because the G-e weight of the composite body can be kept particularly low.
• the composite body is subjected to a hot deformation, in particular forging, with a deformation of at least 1.3 times, in particular at least 2 times, before it is mechanically processed into a weapon barrel, a particularly homogeneous structure of the core tube portion obtained by powder metallurgy can be achieved, with a longer service life of the Gun barrel enters.
• Is as zähfestes material is titanium or a Titanle g IE coding is used, a particularly low-weight weapon barrel may be generated.
• a cobalt-based alloy is used as the highly wear-resistant alloy for gun barrels for guns or the like with a particularly elongated weft track,
• a nickel-based alloy is used as the material for filling the casing tube.
• a cladding tube which has a coating of an adhesion promoter, e.g. Nickel or the like.
• a composite metal tube part was produced by using X40CrMoV51 (with 0.38% C, 1.1% Si, 0.38% Mn, 5.20% Cr, 1.30% Mo and 1.2% V, rest essentially iron) of the dimension: 46 mm outer diameter, 15 mm wall thickness and 650 mm length, a rod of the same length made of free - cutting steel - inserted centrally and in the remaining cavity a metal powder made of a heat-resistant nickel-based alloy with the composition 0 , 12% C, 20.0% Cr, 18.1% Co, 2.5% Ti, 1.5% Al, 1.5% Fe, the rest essentially nickel.
• the tube ends were sealed gas-tight by welding circular sheet metal washers onto the jacket tube and the hot isostatic pressing process was carried out at 1080 ° C. and a gas pressure of 1100 bar for 3 hours.
• the central core made of free-cutting steel was completely drilled out and then the further mechanical processing was carried out to produce the trains and to complete the barrel.
• a sleeve tube made of an alloy of the following composition in wt .-% C 0.33, Si 0.28, Mn 0.50, Cr 3.0, Mo 1.2, V 0.27 and remainder iron with an outer diameter of 60 mm and an inner diameter of 40 mm and a length of 800 mm.
• the hollow cylindrical intermediate space was coated with a powder of a cobalt-based alloy with the following composition in% by weight C 0.17, Si 0.35, Mn 0.65, Cr 28.0, Mo'5.6, Ni max. 0.5, Co 66.0 and Fe max. 0.5 filled, a density of 6.5 g / cm 3 was achieved by shaking. Degassing was carried out at 350 ° C., whereupon an upper cover with a suction opening was welded onto the capsule tube. Then it was evacuated and the suction opening was closed. The encapsulated body was hot-isostatically pressed for 3 hours in an argon atmosphere at 1150 ° C. and at a pressure of 1000 bar.
• This composite body was then forged on a long forging machine to an outer diameter of approximately 35 mm, which corresponds to approximately three times the deformation.
• solution annealing was carried out at 1100 ° C for one hour, after which a barrel for a heavy machine gun was made by mechanical processing and cold forging the trains.
• a cylindrical rod made of free-cutting steel with an outside diameter of 45 mm and a length of 900 mm was inserted in the center of the casing tube.
• the hollow cylindrical space was filled with a powder of a cobalt-based alloy with the following composition in% by weight C 0.17, Si 0.35, Mn 0.65, Cr 28.0, Mo 5.5, Ni max. 0.5, Co 66.0 and Fe max. 0.5 filled, a density of 6.7 g / cm 3 was achieved by shaking. Degassing was carried out at 340 ° C., whereupon an upper cover with a suction opening was welded on. The mixture was then evacuated and hot-isostatically pressed in accordance with Example 2. The composite body thus obtained was forged on a long forging machine to a diameter of 105 mm or 35 mm or 23 mm and a length of 3500 mm, which corresponds to a fourfold deformation.
• the further processing was carried out analogously to Example 2, except that a tensile strength of 900-1100 N / m 2 was set by tempering the jacket tube.
• the tube obtained had a caliber of 1 "and was used for a rapid-fire cannon.
• a casing tube made of TiA16V4 with an outer diameter of 210 mm and an inner diameter of 160 mm and a length of 900 mm was introduced into a capsule tube provided with a base.
• a core rod made of free-cutting steel with a diameter of 45 mm and a length of 900 mm was then introduced into this casing tube.
• the intermediate space was filled with a powder of the following composition in% by weight C 0.34, Cr 1.2, Mo 0.2, A1 0.95, the rest Fe. It was compressed to 70% of the density.
• the procedure was then as in Example 3 and the composite body was forged to a diameter of 105 mm or 35 mm and a length of 3500 mm, which corresponds to a fourfold deformation.
• This composite was a hour at 940 ° C de heated and then cooled in oil and tempered at 520 ° C for four hours. After processing, the inner surface was nitrided in a manner known per se to a depth of 0.3 to 0.4 mm.
• the sleeve tube can also be welded directly to the lids, since there is no pressure on the powder in the radial direction due to the material thickness. of the cladding tube can occur.
• the core can also be formed by a hollow cylinder, in which case, which is particularly suitable for larger calibers, forging can be carried out using a mandrel.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Materials Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Forging (AREA)
• Powder Metallurgy (AREA)
• Pressure Welding/Diffusion-Bonding (AREA)
• Glass Compositions (AREA)
• Manufacture And Refinement Of Metals (AREA)
• Crystals, And After-Treatments Of Crystals (AREA)
• Semiconductor Lasers (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Preventing Corrosion Or Incrustation Of Metals (AREA)
• Coating With Molten Metal (AREA)

Applications Claiming Priority (2)

Publications (2)

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Citations (6)

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• 1983
  • 1983-12-08 GR GR73197A patent/GR79748B/el unknown
  • 1983-12-14 US US06/561,279 patent/US4747225A/en not_active Expired - Fee Related
  • 1983-12-21 GR GR73306A patent/GR81355B/el unknown
  • 1983-12-22 AT AT83890232T patent/ATE33218T1/de not_active IP Right Cessation
  • 1983-12-22 EP EP83890232A patent/EP0114591B1/fr not_active Expired
  • 1983-12-22 ES ES528315A patent/ES528315A0/es active Granted
  • 1983-12-22 EP EP83890233A patent/EP0114592B1/fr not_active Expired
  • 1983-12-22 DE DE8383890232T patent/DE3376100D1/de not_active Expired
  • 1983-12-22 ES ES528317A patent/ES528317A0/es active Granted
  • 1983-12-22 AT AT83890233T patent/ATE33219T1/de not_active IP Right Cessation
  • 1983-12-22 EP EP83890234A patent/EP0114593A1/fr not_active Withdrawn
  • 1983-12-22 DE DE8383890233T patent/DE3376101D1/de not_active Expired

Patent Citations (6)

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