The treatment technology that uses modern technology to change the surface, subsurface composition, structure and properties of the forged mold is called surface modification technology, and mainly includes the following ten categories:
The technique of forming an oxide film on the surface of a part in an electrolyte solution and an external current is called an electrochemical modification technique. Electrochemical conversion modification techniques are also often referred to as anodizing or anodizing in engineering. Recently, a major exhibition of electrochemical conversion technology is micro-arc plasma anodization, which can significantly improve the surface hardness or form a new color decorative film layer, which has a good application in the mold industry.
2. Surface formation strengthening
Using blasting, extrusion, laser shock, rolling, ultrasonic shock, vibration shock, high pressure jet and other processes to make the surface layer of the material elastically deformed, introducing residual compressive stress and generating changes in microstructure, thereby improving The material's resistance to fatigue and corrosion resistance enhances the stability and durability of the part.
3. Surface phase transformation strengthening
The surface of the material is rapidly heated by electron beam, laser beam, etc., so that the surface and subsurface form a new phase change region and surface strengthening amount, thereby obtaining a special performance surface layer having a fine structure and a strengthening phase.
4. Ion implantation
The ions separated by the vacuum system are accelerated at a high voltage and directly injected into the surface of the material to form a very thin ion implantation layer, which changes the composition and structure of the surface of the material and improves the surface properties of the material.
5. Surface alloying (diffusion)
Metal or non-metal is deposited on the surface of the base material, and penetrates into the surface of the base material by diffusion to change the chemical composition and phase structure of the surface of the material to improve the surface properties of the material.