EP0977002B1 - Waffenrohr mit einer verschleissmindernden Hartchromschicht - Google Patents
Waffenrohr mit einer verschleissmindernden Hartchromschicht Download PDFInfo
- Publication number
- EP0977002B1 EP0977002B1 EP99110786A EP99110786A EP0977002B1 EP 0977002 B1 EP0977002 B1 EP 0977002B1 EP 99110786 A EP99110786 A EP 99110786A EP 99110786 A EP99110786 A EP 99110786A EP 0977002 B1 EP0977002 B1 EP 0977002B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cracks
- gun barrel
- chrome
- layer
- chrome layer
- 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.)
- Expired - Lifetime
Links
Images
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
- F41A21/02—Composite barrels, i.e. barrels having multiple layers, e.g. of different materials
- F41A21/04—Barrel liners
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
-
- 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
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12632—Four or more distinct components with alternate recurrence of each type component
Definitions
- the invention relates to a weapon barrel with an inside wear-reducing hard chrome layer, which a variety of Contains micro cracks.
- a disadvantage of these known gun barrels is, among other things, that their manufacture is proportional is complex.
- the micro cracks located inside the chrome layer not be filled with the sliding layer, so that this their chromium breakout inducing effect to keep.
- the present invention has for its object to provide a weapon barrel, the hard chrome layer improved thermal shock resistance compared to conventional hard chrome layers without the micro cracks being filled with a layer of high lubricity Need to become.
- the invention is essentially based on the idea of the number of microcracks in the hard chrome layer compared to gun barrels with conventional hard chrome layers, whereby in the cross-sectional area of the respective hard chrome layer at least 500 cracks / cm or on the The surface of the coating is at least 150 cracks / cm.
- the surprisingly caused by the increase in the crack number improved thermal shock resistance of hard chrome can be explained as follows:
- the shot is subject to very brittle chrome layer high loads that lead to accordingly high thermally induced strains and stresses to lead. Once the strains become elastic due to the chrome layer exceed the recordable share, they will be via the existing and additional cracks (expansion joints) added.
- the conventional chrome layers where the number of cracks measured in cross section is approximately between 200 and 400 cracks / cm or that on the surface of the coating counted number of cracks is between 40 and 70 cracks / cm-, the cracks have a relatively high amount of elongation in one take such thermal shock so that they are too relative large cracks grow together, which in turn for the Chromium breakouts are responsible.
- the invention now proposes by increasing the number of cracks to minimize the amount of elongation related to the individual crack (Pseudo-productility), so that a growing together larger Cracks responsible for chrome breakouts no longer can arise.
- the gun barrels according to the invention have the improved Thermal shock resistance has the advantage over that well-known chrome-plated gun barrels with chrome layers greater wall thickness can be applied to the gun barrel can, which allow better protection of the pipe material.
- the chrome layers of the invention Gun barrels less sensitive to mechanical Loads (e.g. with floor contact) and therefore also advantageous can be used in machine guns.
- the composition can influence the frequency of cracks of the chromium plating electrolyte, the chromium plating temperature and the type of current supply when the gun barrel is chrome-plated take place, the optimal parameters for the respective application can be determined by tests have to.
- 1 designates a gun barrel that one Cargo space 2 includes.
- the gun barrel 1 is with a hard chrome layer 3 provided the wall thickness 4 and extends in the direction of the longitudinal axis 5.
- Fig.2 are in the hard chrome layer 3 shows a large number of microcracks 6, according to the invention in the cross-sectional area of the respective hard chrome layer at least 500 cracks / cm or on the surface the coating has at least 150 cracks / cm.
Description
- Fig.1
- den Längsschnitt eines Teiles eines mit einer Hartchromschicht versehenen erfindungsgemäßen Waffenrohres und
- Fig.2
- einen vergrößerten Querschnittsbereich entlang der in Fig.1 mit II-II bezeichneten Schnittlinie.
- 1
- Waffenrohr
- 2
- Ladungsraum
- 3
- Hartchromschicht
- 4
- Wandstärke
- 5
- Längsachse
- 6
- Mikroriß
Claims (2)
- Waffenrohr mit einer innenseitigen verschleißmindernden Hartchromschicht (3), die eine Vielzahl von Mikrorissen (6) enthält, dadurch gekennzeichnet, daß die Querschnittsfläche der jeweiligen Hartchromschicht (3) mindestens 500 Risse/cm enthält.
- Waffenrohr nach Anspruch 1, dadurch gekennzeichnet, daß auf der Oberfläche der Hartchromschicht (3) mindestens 150 Risse/cm vorhanden sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19834394A DE19834394A1 (de) | 1998-07-30 | 1998-07-30 | Waffenrohr mit einer verschleißmindernden Hartchromschicht |
DE19834394 | 1998-07-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0977002A2 EP0977002A2 (de) | 2000-02-02 |
EP0977002A3 EP0977002A3 (de) | 2000-03-29 |
EP0977002B1 true EP0977002B1 (de) | 2002-11-27 |
Family
ID=7875873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99110786A Expired - Lifetime EP0977002B1 (de) | 1998-07-30 | 1999-06-04 | Waffenrohr mit einer verschleissmindernden Hartchromschicht |
Country Status (4)
Country | Link |
---|---|
US (2) | US6381893B2 (de) |
EP (1) | EP0977002B1 (de) |
DE (2) | DE19834394A1 (de) |
ES (1) | ES2185270T3 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6594936B1 (en) * | 2002-10-03 | 2003-07-22 | Gary Sniezak | Method for lining a gun barrel |
DE102004003403A1 (de) * | 2004-01-23 | 2005-08-11 | Bayerische Motoren Werke Ag | Verfahren zur Herstellung eines Bauteils mit einer innenbeschichteten Bohrung |
US8701326B2 (en) | 2011-12-08 | 2014-04-22 | Sturm, Ruger & Company, Inc. | Pistol barrel system and method |
DE102012000686A1 (de) * | 2012-01-17 | 2013-07-18 | Rheinmetall Waffe Munition Gmbh | Waffenrohr mit verchromtem Innenprofil |
Family Cites Families (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3985916A (en) * | 1970-02-02 | 1976-10-12 | Kaman Sciences Corporation | Sealing and densifying chrome plated metal parts |
AU4610272A (en) | 1971-09-07 | 1974-03-07 | M & T Chemicals Inc | Wearing surface |
US3780465A (en) * | 1972-06-01 | 1973-12-25 | Us Navy | Wear resistant gun barrel and method of making the same |
US4051275A (en) * | 1974-06-21 | 1977-09-27 | Forestek Clarence W | Embedding and compacting particles in porous surfaces |
US3943040A (en) * | 1974-09-20 | 1976-03-09 | The Harshaw Chemical Company | Microcracked chromium from a bath using an organic sulfur compound |
FR2287532A1 (fr) * | 1974-10-07 | 1976-05-07 | Parker Ste Continentale | Perfectionnements relatifs au depot electrolytique de chrome microfissure |
AT361527B (de) * | 1976-05-14 | 1981-03-10 | Kloeckner Werke Ag | Verfahren zur herstellung eines verbundwerk- stoffes |
CH638411A5 (de) * | 1979-07-20 | 1983-09-30 | Accumold Ag | Verfahren zum verformen eines verschlissenen, konischen, insbesondere gebogenen kokillenrohres. |
CH644040A5 (de) * | 1979-11-07 | 1984-07-13 | Accumold Ag | Verfahren zur behandlung der innenoberflaeche eines kokillenrohres zum stranggiessen. |
FR2514032A1 (fr) * | 1981-10-06 | 1983-04-08 | Nicolas Guy | Revetement a base de chrome pour acier resistant a l'usure et procede de preparation |
GR79748B (de) * | 1982-12-23 | 1984-10-31 | Ver Edelstahlwerke Ag | |
US4756677A (en) * | 1982-12-23 | 1988-07-12 | Vereinigte Edelstahlwerke Aktiengesellshaft | Method of manufacturing a weapon barrel |
US4435455A (en) * | 1983-01-10 | 1984-03-06 | United Technologies Corporation | Compliant composite tubular liners of fiber reinforced glass/glass-ceramic having utility as gun barrel liners |
DE3313503A1 (de) * | 1983-04-14 | 1984-10-18 | Evertz, Egon, 5650 Solingen | Einteilige durchlaufstranggiesskokille und verfahren zu ihrer herstellung |
FR2549090A1 (fr) * | 1983-07-13 | 1985-01-18 | Traitements Surface Mecanique | Procede de protection d'une surface metallique par depot electrolytique d'une couche epaisse de chrome microfissure et pieces obtenues |
CH663455A5 (de) * | 1984-04-19 | 1987-12-15 | Balzers Hochvakuum | Rohr mit einer innenbeschichtung. |
USH543H (en) * | 1986-10-10 | 1988-11-01 | The United States Of America As Represented By The Secretary Of The Army | Laminated chromium composite |
US4896581A (en) * | 1988-12-30 | 1990-01-30 | Richard Cole | Accurizer |
US4911060A (en) * | 1989-03-20 | 1990-03-27 | The United States Of America As Represented By The Secretary Of The Army | Reduced weight gun tube |
US5074189A (en) * | 1989-12-22 | 1991-12-24 | Legend Ammunition, Inc. | Electrically-fired and magnetically actuated firearm |
US5298092A (en) * | 1990-05-17 | 1994-03-29 | The Boeing Company | Non-chromated oxide coating for aluminum substrates |
DE4107273C2 (de) * | 1991-03-07 | 1993-11-11 | Rheinmetall Gmbh | Waffenrohr |
US5182139A (en) * | 1991-09-16 | 1993-01-26 | The United States Of America As Represented By The Secretary Of The Army | Ultrasonic realtime determination and display of thickness of chromium on gun barrels |
EP0725160A1 (de) * | 1991-11-20 | 1996-08-07 | OHMI, Tadahiro | Verfahren zum herstellen passiver oxidfilme basiert auf chromoxid und rostfreiem stahl |
US5341719A (en) * | 1992-12-14 | 1994-08-30 | General Electric Company | Multi-layer composite gun barrel |
IL107544A0 (en) * | 1993-11-09 | 1994-02-27 | Golan Galvanics Ltd | Electrolyte for electroplating of chromium based coating having improved wear resistance corrosion resistance and plasticity |
USH1365H (en) * | 1994-02-04 | 1994-11-01 | The United States Of America As Represented By The Secretary Of The Air Force | Hybrid gun barrel |
DE4410325C2 (de) * | 1994-03-25 | 1997-03-27 | Rheinmetall Ind Gmbh | Waffenrohr mit einer erosionsmindernden Einlage und Verwendung des Waffenrohres in elektrischen Kanonen |
DE4419864C2 (de) * | 1994-06-07 | 2001-01-11 | Rheinmetall W & M Gmbh | Elektrode zur elektrolytischen Innenbeschichtung und/oder zum Elektropolieren von Waffenrohren |
US5415351A (en) * | 1994-09-06 | 1995-05-16 | Kraft Tool Company | Pneumatic spray gun with improved bearing frame |
JP2987768B2 (ja) * | 1997-03-27 | 1999-12-06 | 株式会社シェルター | 建築物における構造用集成材及び骨組構造用建築部材 |
US5841057A (en) * | 1997-10-09 | 1998-11-24 | The United States Of America As Represented By The Secretary Of The Navy | Method and apparatus for liquid injection to reduce gun barrel erosion |
DE19918794C2 (de) * | 1999-04-26 | 2002-06-27 | Rheinmetall W & M Gmbh | Verfahren zur Herstellung eines Waffenrohres |
DE19919688A1 (de) * | 1999-04-30 | 2000-11-02 | Rheinmetall W & M Gmbh | Verfahren zur Innenbeschichtung eines Waffenrohres |
-
1998
- 1998-07-30 DE DE19834394A patent/DE19834394A1/de not_active Withdrawn
-
1999
- 1999-06-04 ES ES99110786T patent/ES2185270T3/es not_active Expired - Lifetime
- 1999-06-04 EP EP99110786A patent/EP0977002B1/de not_active Expired - Lifetime
- 1999-06-04 DE DE59903519T patent/DE59903519D1/de not_active Expired - Fee Related
- 1999-07-30 US US09/363,651 patent/US6381893B2/en not_active Expired - Fee Related
-
2002
- 2002-03-13 US US10/095,476 patent/US6701656B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59903519D1 (de) | 2003-01-09 |
ES2185270T3 (es) | 2003-04-16 |
US6381893B2 (en) | 2002-05-07 |
US20020095846A1 (en) | 2002-07-25 |
US20010029689A1 (en) | 2001-10-18 |
US6701656B2 (en) | 2004-03-09 |
EP0977002A3 (de) | 2000-03-29 |
DE19834394A1 (de) | 2000-02-03 |
EP0977002A2 (de) | 2000-02-02 |
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