| abstract |
A kind of aluminium alloy gear box, including lower box and the upper box that is connected with lower box, upper box and lower box inner surface are coated with zirconium oxide series ceramic material layer, and upper box and nowel external surface coat heat-resisting paint, and the ingredient of aluminium alloy is simple；To the surface treatment procedure that the aluminium alloy of the ingredient is passivated, the problems such as avoiding the occurrence of any surface stain, keep acquisition surface clean and tidy. |