| abstract |
A kind of motor vehicle gearbox and its manufacturing method, the gearbox includes lower box and upper box, lower box is connected to form gearbox cavity with upper box, transmission shaft and gear are provided in gearbox cavity, the gear includes the tungsten carbide coating on gear and gear surface, the upper box inner surface is coated with alumina series ceramic material layer, the lower box inner surface is coated with carbonization titanium series ceramic material layer, upper box and nowel external surface coating heat-resisting paint, the ingredient of aluminium alloy are simple；Organic coating is formed to box outer surface and effectively improves weather-proof antifouling property, by improving its wearability to gear outer surface coated with tungsten carbide coating. |