What are copper castings? The manufacturer introduces the surface treatment methods of copper castin
What is copper casting?
Copper castings have different names in different places, such as copper die-casting parts, die-casting copper parts, die-casting copper parts, die-casting copper, copper castings, copper alloy die-casting parts, etc. Because metal copper and copper alloys have good fluidity and plasticity, and the casting process is cast in a pressure die casting machine, copper castings can be made into a variety of messy shapes, and can also be made with higher precision and finish , And then greatly reduced the machining volume of castings and the casting margin of metal copper or copper alloy, not only saving electricity, metal materials, but also greatly saving labor costs; copper and copper alloys have excellent thermal conductivity, Smaller specific gravity and high workability; then copper castings are widely used in car production, internal combustion engine production, motorcycle production, electric motor production, oil pump production, transmission machinery production, precision instruments, landscaping, electric power construction, architectural decoration, etc. Occupation.
What are the methods for surface treatment of copper castings?
I want to remove the oil on the surface. I can recommend that you use copper bai acid to remove oil stains and no corrosion to the workpiece! In the case of varnish, it is to make a copper film to increase the adhesion of the paint! In addition, copper plates cannot be used for general metal paint. Copper is a very vivid metal and generally has poor paint adhesion. Copper alloys have no tendency to brittle cracking at low temperatures. As the temperature decreases, the mechanical properties change to some extent, and the strength increases, but the plasticity decreases little. Therefore, sometimes in order to reduce or eliminate the internal stress of the casting, the casting Or the quenched castings are cooled to -50°C, -70°C or lower temperature for 2-3 hours, and then heated to room temperature in air or hot water, or artificial aging is performed. This technique is called cold treatment.