EP1403609A1 - Procédé pour le revêtement intérieur d'une tube d'arme - Google Patents

Procédé pour le revêtement intérieur d'une tube d'arme Download PDF

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Publication number
EP1403609A1
EP1403609A1 EP03015336A EP03015336A EP1403609A1 EP 1403609 A1 EP1403609 A1 EP 1403609A1 EP 03015336 A EP03015336 A EP 03015336A EP 03015336 A EP03015336 A EP 03015336A EP 1403609 A1 EP1403609 A1 EP 1403609A1
Authority
EP
European Patent Office
Prior art keywords
barrel
gun barrel
layer material
layer
laser beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03015336A
Other languages
German (de)
English (en)
Inventor
Stefan Kaufmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rheinmetall Waffe Munition GmbH
Original Assignee
Rheinmetall W&M GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10329131A external-priority patent/DE10329131A1/de
Application filed by Rheinmetall W&M GmbH filed Critical Rheinmetall W&M GmbH
Publication of EP1403609A1 publication Critical patent/EP1403609A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F41A21/22—Barrels which have undergone surface treatment, e.g. phosphating

Definitions

  • the invention relates to a method for the inner coating of a weapon barrel, on the inner surface of which a layer of a layer material is applied at least in a partial area in order to avoid erosions.
  • a disadvantage of this known method is, inter alia, that the electrolytically deposited hard chrome layers do not withstand the increased ammunition. The resulting chrome eruptions gradually cause severe erosions.
  • protective layers of high-melting materials such as niobium, molybdenum, tantalum, hafnium, vanadium, tungsten, zirconium or their alloys, in layer thicknesses of up to a few mm, for example by plasma spraying or laser deposition welding, on the inner surface of the weapon barrel. It has been shown that in the case of plasma spraying, protective layers are deposited on the inner surface of the weapon barrel, which have a relatively low connection to the base material of the weapon barrel and have a high porosity.
  • high-melting materials such as niobium, molybdenum, tantalum, hafnium, vanadium, tungsten, zirconium or their alloys
  • a corresponding laser beam is directed onto the inner surface of the gun barrel, which melts the areas of the gun barrel near the surface.
  • the layer material is introduced in powder, wire or ribbon form shortly before the laser beam strikes the inner surface of the weapon barrel and is melted by it, so that a molten bath containing the melted weapon barrel material and the layer material is formed in the area of the weapon barrel near the surface, which solidifies when the laser beam moves on.
  • a disadvantage of laser cladding has been that a relatively large amount of heat has to be introduced into the tube material, so that heat-affected zones of up to 10 mm are sometimes formed. However, this leads to a negative influence on the autofrettage residual stresses of the corresponding gun barrel.
  • the invention has for its object to provide a method for coating the inside of a weapon barrel, with which to avoid erosion, high-melting layer materials can be applied to the inner surface of the barrel, which form a good connection with the base material of the barrel and when they are applied, the residual stress state of the Gun barrel should only be slightly influenced by heat.
  • the invention is essentially based on the idea of using a laser-assisted plasma spraying method to apply a protective layer to the inner surface of the weapon barrel.
  • the layer material is applied by plasma spraying to the inner surface of the gun barrel and at the same time a laser beam is directed onto the inner surface of the gun barrel and the areas of the gun barrel that are coated or still to be coated are melted, so that the molten gun barrel material is melted in the area of the gun barrel near the surface and forms the melt pool containing the layer material, which solidifies as the laser beam moves on.
  • 1 denotes a weapon barrel, which is covered with a hard metal, e.g. Niobium to be coated.
  • a hard metal e.g. Niobium to be coated.
  • a known plasma spray system 3 is arranged in the gun barrel. This generates a plasma jet 4 of high temperature and high flow velocity, into which the powdery layer material is introduced by means of a powder injector (not shown). The hot plasma jet then melts the layer material and accelerates it in droplets at high speed to the inner surface 5 of the weapon barrel 1.
  • the laser beam 7 generated by a CO 2 or Nd: YAG laser 6 is directed via a deflecting mirror 8 onto the inner surface 5 of the weapon barrel 1 and the weapon barrel region 10 which has just been coated with the layer material 9 is melted for a short time, so that it comes close to the surface Area of the weapon barrel 1 forms a molten bath 11 containing the molten weapon barrel material and the layer material, which solidifies during the further movement of the plasma and laser beams 4 and 7.
  • a flat coating of the inner surface 5 of the gun barrel 1 in the partial area 2 is obtained in that the plasma spraying system 3 as well as the laser beam 6 and the gun barrel 1 execute a spiral movement relative to one another.
  • the plasma spraying system 3 with the deflecting mirror 8 can carry out both an axial and a rotary movement with the aid of a displacement device (not shown).
  • the laser beam 7 does not necessarily have to be directed directly onto the focusing spot 12 of the plasma beam 4, but rather can briefly melt the inner surface of the weapon barrel 1 immediately in front of the focusing spot 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
EP03015336A 2002-09-18 2003-07-08 Procédé pour le revêtement intérieur d'une tube d'arme Withdrawn EP1403609A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10243314 2002-09-18
DE10243314 2002-09-18
DE10329131A DE10329131A1 (de) 2002-09-18 2003-06-27 Verfahren zur Innenbeschichtung eines Waffenrohres
DE10329131 2003-06-27

Publications (1)

Publication Number Publication Date
EP1403609A1 true EP1403609A1 (fr) 2004-03-31

Family

ID=31979480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03015336A Withdrawn EP1403609A1 (fr) 2002-09-18 2003-07-08 Procédé pour le revêtement intérieur d'une tube d'arme

Country Status (3)

Country Link
US (1) US20040052964A1 (fr)
EP (1) EP1403609A1 (fr)
JP (1) JP2004108772A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005085743A1 (fr) * 2004-03-08 2005-09-15 Moerth Marlene Procede d'application de revetements interieurs par depot physique en phase vapeur sur des pieces metalliques a alesages profonds et des canons d'armes a feu

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10122663C1 (de) * 2001-05-10 2002-08-01 Heckler & Koch Gmbh Verfahren zum Endbearbeiten einer Verriegelungsfläche einer Selbstlade-Handfeuerwaffe sowie hierdurch erhaltene Verriegelunsfläche
DE102005018618A1 (de) * 2005-04-21 2006-10-26 Rheinmetall Waffe Munition Gmbh Waffenrohr und Verfahren zur Beschichtung der inneren Oberfläche des Waffenrohres
US20070256345A1 (en) * 2006-05-04 2007-11-08 Hall David R A Rigid Composite Structure with a Superhard Interior Surface
US20100080982A1 (en) * 2008-10-01 2010-04-01 Caterpillar Inc. Thermal spray coating application
GB2538036A (en) 2015-01-30 2016-11-09 Weir Group Ip Ltd Autofrettage of thermally clad components
WO2024130228A1 (fr) * 2022-12-16 2024-06-20 Maxterial, Inc. Armes et composants d'arme comprenant des revêtements de surface

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3808285A1 (de) * 1988-03-12 1989-09-21 Messer Griesheim Gmbh Verfahren zur herstellung harter und verschleissfester oberflaechenschichten
DE19919687A1 (de) * 1999-04-30 2000-11-02 Rheinmetall W & M Gmbh Verfahren zur Innenbeschichtung eines Waffenrohres
DE19919688A1 (de) * 1999-04-30 2000-11-02 Rheinmetall W & M Gmbh Verfahren zur Innenbeschichtung eines Waffenrohres

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1157141B1 (fr) * 1999-02-19 2005-06-22 Volkswagen Aktiengesellschaft Procede et dispositif permettant d'usiner la surface d'une piece

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3808285A1 (de) * 1988-03-12 1989-09-21 Messer Griesheim Gmbh Verfahren zur herstellung harter und verschleissfester oberflaechenschichten
DE19919687A1 (de) * 1999-04-30 2000-11-02 Rheinmetall W & M Gmbh Verfahren zur Innenbeschichtung eines Waffenrohres
DE19919688A1 (de) * 1999-04-30 2000-11-02 Rheinmetall W & M Gmbh Verfahren zur Innenbeschichtung eines Waffenrohres

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005085743A1 (fr) * 2004-03-08 2005-09-15 Moerth Marlene Procede d'application de revetements interieurs par depot physique en phase vapeur sur des pieces metalliques a alesages profonds et des canons d'armes a feu

Also Published As

Publication number Publication date
JP2004108772A (ja) 2004-04-08
US20040052964A1 (en) 2004-03-18

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