The heat treatment of copper alloy casting can be divided into:

1. Stress relief annealing is designed to eliminate the internal stress generated after casting and welding.

2. Intensive heat treatment including solution treatment and aging treatment, the alloy is aimed at improving the physical properties, mechanical properties and corrosion resistance.

3. Heat treatment, in order to eliminate the casting defects when casting bronze is heated to 400-500℃, δ between the α phase dendrite dissolution α phase diffusion, causing the alloy volume expansion, thus blocking the microtubule bronze to improve its pressure resistance.

Due to the loose structure of porous copper metal body, the electroplating process of copper parts must be strict:

Each treatment is completely protected from the effects of the cleaning solution remaining in the process holes;

Copper components than average current density electroplating parts, preplating time is longer than the number of general parts higher impact about three times the actual surface area calculated surface area many times larger;

When pre-plating, even parts together should always shake it, in order to ensure uniform coating color, to prevent the phenomenon of color spots combined to affect the appearance of the silver plating layer quality;

When silver, the groove must then be used again by shaking the plated workpiece for 5 minutes, under the premise of affecting the current density to charge at the normal current density;

Passivation treatment, to enhance the cleaning of silver, 10-20 minutes in tap water washing, then hot water, once dry, can control the oven temperature 100-150℃, a little longer time, to prevent the generation of mildew.