EP0977002A3 - Gun barrel with a wear reducing hard chromium layer - Google Patents
Gun barrel with a wear reducing hard chromium layer Download PDFInfo
- Publication number
- EP0977002A3 EP0977002A3 EP99110786A EP99110786A EP0977002A3 EP 0977002 A3 EP0977002 A3 EP 0977002A3 EP 99110786 A EP99110786 A EP 99110786A EP 99110786 A EP99110786 A EP 99110786A EP 0977002 A3 EP0977002 A3 EP 0977002A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- hard chrome
- gun barrel
- chromium layer
- hard chromium
- wear reducing
- 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.)
- Granted
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
- Electroplating Methods And Accessories (AREA)
- Physical Vapour Deposition (AREA)
Abstract
Die Erfindung betrifft ein Waffenrohr mit einer innenseitigen verschleißmindernden Hartchromschicht (3), die eine Vielzahl von Mikrorissen (6) enthält.The invention relates to a weapon barrel with an inside wear-reducing hard chrome layer (3) that a variety of microcracks (6) contains.
Um zu erreichen, daß die Hartchromschicht (3) des Waffenrohres (1) eine gegenüber herkömmlichen Hartchromschichten verbesserte Thermoschockbeständigkeit aufweist, schlägt die Erfindung vor, daß in der Querschnittsfläche der jeweiligen Hartchromschicht (3) mindestens 500 Risse/cm bzw. auf der Oberfläche der Hartchromschicht mindestens 150 Risse/cm vorhanden sind. In order to ensure that the hard chrome layer (3) of the weapon barrel (1) has improved thermal shock resistance compared to conventional hard chrome layers, the invention proposes that at least 500 cracks / cm in the cross-sectional area of the respective hard chrome layer (3) or on the surface of the hard chrome layer there are at least 150 cracks / cm.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19834394A DE19834394A1 (en) | 1998-07-30 | 1998-07-30 | Gun barrel with a wear-reducing hard chrome layer |
DE19834394 | 1998-07-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0977002A2 EP0977002A2 (en) | 2000-02-02 |
EP0977002A3 true EP0977002A3 (en) | 2000-03-29 |
EP0977002B1 EP0977002B1 (en) | 2002-11-27 |
Family
ID=7875873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99110786A Expired - Lifetime EP0977002B1 (en) | 1998-07-30 | 1999-06-04 | Gun barrel with a wear reducing hard chromium layer |
Country Status (4)
Country | Link |
---|---|
US (2) | US6381893B2 (en) |
EP (1) | EP0977002B1 (en) |
DE (2) | DE19834394A1 (en) |
ES (1) | ES2185270T3 (en) |
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 (en) * | 2004-01-23 | 2005-08-11 | Bayerische Motoren Werke Ag | Method for producing a component with an internally coated bore |
US8701326B2 (en) | 2011-12-08 | 2014-04-22 | Sturm, Ruger & Company, Inc. | Pistol barrel system and method |
DE102012000686A1 (en) * | 2012-01-17 | 2013-07-18 | Rheinmetall Waffe Munition Gmbh | Gun barrel with chromed inner profile |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2244029A1 (en) * | 1971-09-07 | 1973-03-15 | M & T Chemicals Inc | PROCESS FOR THE PRODUCTION OF SLIGHTLY INCREASED ELECTROCAL CHROME DEPOSIT |
US3943040A (en) * | 1974-09-20 | 1976-03-09 | The Harshaw Chemical Company | Microcracked chromium from a bath using an organic sulfur compound |
GB1456355A (en) * | 1974-10-07 | 1976-11-24 | Parker Ste Continentale | Electrodeposition of microcracked chromium |
FR2549090A1 (en) * | 1983-07-13 | 1985-01-18 | Traitements Surface Mecanique | Process for protecting a metal surface by electrolytic deposition of a thick layer of microfissured chromium and articles obtained |
DE4107273A1 (en) * | 1991-03-07 | 1992-09-10 | Rheinmetall Gmbh | Hard chromed weapon barrel interior with reduced wear - has cracks and pores in chrome surface which are filled with low friction PTFE particles |
Family Cites Families (29)
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 |
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 |
AT361527B (en) * | 1976-05-14 | 1981-03-10 | Kloeckner Werke Ag | METHOD FOR PRODUCING A COMPOSITE |
CH638411A5 (en) * | 1979-07-20 | 1983-09-30 | Accumold Ag | METHOD FOR DEFORMING A WEARED, CONICAL, IN PARTICULAR BENT, CHILLER TUBE. |
CH644040A5 (en) * | 1979-11-07 | 1984-07-13 | Accumold Ag | METHOD FOR TREATING THE INTERIOR SURFACE OF A CHILLER TUBE FOR CONTINUOUS CASTING. |
FR2514032A1 (en) * | 1981-10-06 | 1983-04-08 | Nicolas Guy | CHROME-BASED COATING FOR WEAR-RESISTANT STEEL AND PROCESS FOR PREPARING THE SAME |
GR79748B (en) * | 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 (en) * | 1983-04-14 | 1984-10-18 | Evertz, Egon, 5650 Solingen | ONE-PIECE CONTINUOUS CASTING CHOCOLATE AND METHOD FOR THEIR PRODUCTION |
CH663455A5 (en) * | 1984-04-19 | 1987-12-15 | Balzers Hochvakuum | TUBE WITH AN INTERNAL COATING. |
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 |
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 |
WO1993010274A1 (en) * | 1991-11-20 | 1993-05-27 | Tadahiro Ohmi | Method of forming passive oxide film based on chromium oxide and stainless steel |
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 (en) * | 1994-03-25 | 1997-03-27 | Rheinmetall Ind Gmbh | Gun barrel with an erosion-reducing insert and use of the gun barrel in electrical cannons |
DE4419864C2 (en) * | 1994-06-07 | 2001-01-11 | Rheinmetall W & M Gmbh | Electrode for internal electrolytic coating and / or for electropolishing gun barrels |
US5415351A (en) * | 1994-09-06 | 1995-05-16 | Kraft Tool Company | Pneumatic spray gun with improved bearing frame |
JP2987768B2 (en) * | 1997-03-27 | 1999-12-06 | 株式会社シェルター | Glued laminated lumber for buildings and building components for framed structures |
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 (en) * | 1999-04-26 | 2002-06-27 | Rheinmetall W & M Gmbh | Method of making a gun barrel |
DE19919688A1 (en) * | 1999-04-30 | 2000-11-02 | Rheinmetall W & M Gmbh | Process for coating the inside of a gun barrel |
-
1998
- 1998-07-30 DE DE19834394A patent/DE19834394A1/en not_active Withdrawn
-
1999
- 1999-06-04 DE DE59903519T patent/DE59903519D1/en not_active Expired - Fee Related
- 1999-06-04 EP EP99110786A patent/EP0977002B1/en not_active Expired - Lifetime
- 1999-06-04 ES ES99110786T patent/ES2185270T3/en not_active Expired - Lifetime
- 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
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2244029A1 (en) * | 1971-09-07 | 1973-03-15 | M & T Chemicals Inc | PROCESS FOR THE PRODUCTION OF SLIGHTLY INCREASED ELECTROCAL CHROME DEPOSIT |
US3943040A (en) * | 1974-09-20 | 1976-03-09 | The Harshaw Chemical Company | Microcracked chromium from a bath using an organic sulfur compound |
GB1456355A (en) * | 1974-10-07 | 1976-11-24 | Parker Ste Continentale | Electrodeposition of microcracked chromium |
FR2549090A1 (en) * | 1983-07-13 | 1985-01-18 | Traitements Surface Mecanique | Process for protecting a metal surface by electrolytic deposition of a thick layer of microfissured chromium and articles obtained |
DE4107273A1 (en) * | 1991-03-07 | 1992-09-10 | Rheinmetall Gmbh | Hard chromed weapon barrel interior with reduced wear - has cracks and pores in chrome surface which are filled with low friction PTFE particles |
Also Published As
Publication number | Publication date |
---|---|
DE59903519D1 (en) | 2003-01-09 |
US20010029689A1 (en) | 2001-10-18 |
EP0977002A2 (en) | 2000-02-02 |
ES2185270T3 (en) | 2003-04-16 |
US6701656B2 (en) | 2004-03-09 |
US6381893B2 (en) | 2002-05-07 |
US20020095846A1 (en) | 2002-07-25 |
DE19834394A1 (en) | 2000-02-03 |
EP0977002B1 (en) | 2002-11-27 |
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