FIELD: metallurgy.
SUBSTANCE: invention refers to motor engineering, particularly to process of strengthening seats of valves by method of micro-arc oxidising and can be implemented for strengthening seats of valves of internal combustion engines out of aluminium alloy. The procedure consists in strengthening surface of the valve seat in electrolyte; also strengthening is performed by the method of micro-arc oxidising during 2 hours in electrolyte consisting of distilled water with addition of 1-2 g/l KOH and 2-6 g/l Na2SiO3 at current strength at anode la=0.1÷1.0 A, current strength at cathode Ic=0.1÷1.0 A, voltage at anode Ua=345-405 V and voltage at cathode Vc=90-130 V.
EFFECT: increased wear resistance and micro-hardness of valve seats and processability of procedure.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| MANUFACTURING TECHNIQUE OF HIGH-BUILD WEAR-RESISTANT COATING BY MICROARC OXIDATION | 2013 |
|
RU2541246C1 |
| METHOD OF COATING UNIPOLAR-CONDUCTANCE METALS | 1993 |
|
RU2110623C1 |
| METHOD OF PRODUCING THICK-LAYER HEAT-SHIELDING COATINGS BY MICROARC OXIDATION ON HIGH-SILICON ALUMINUM ALLOY | 2018 |
|
RU2694441C1 |
| METHOD FOR OBTAINING COMPOSITE COATINGS ON VALVE METALS AND THEIR ALLOYS | 2022 |
|
RU2787330C1 |
| METHOD OF RECONDITIONING PARTS FROM ALUMINIUM ALLOYS | 2012 |
|
RU2482949C1 |
| PRODUCTION OF COMPOSITE COATINGS ON GATE METAL ALLOYS | 2013 |
|
RU2527110C1 |
| PART OF CYLINDER-PISTON GROUP OF INTERNAL COMBUSTION ENGINE, METHOD OF MACHINING OF ITS SURFACE, DEVICE FOR IMPLEMENTING THIS METHOD, AND INSTALLATION FOR MACHINING WORKING SURFACE OF CYLINDER | 1998 |
|
RU2135803C1 |
| METHOD FOR RESTORATION OF WORN RESTING PLANES OF ALUMINUM ALLOY HEADS OF BLOCK OF INTERNAL COMBUSTION ENGINES | 2004 |
|
RU2274537C1 |
| METHOD OF PRODUCING MAGNESIUM ALLOY-BASED PROTECTIVE COATS | 2011 |
|
RU2447202C1 |
| METHOD OF RECONDITIONING WORNOUT PARTS FROM ALUMINIUM ALLOYS | 2009 |
|
RU2389593C1 |
