Surface alloying technology:
- Carburizing: By heating or holding steel parts with low carbon content in a carburizing medium, carbon atoms are infiltrated into the surface to improve the surface hardness and wear resistance of the material.
- Nitriding: In low carbon alloy steel, nitriding through the heating medium, the formation of nitride layer, improve the surface hardness and wear resistance.
- Carbon and nitrogen co-infiltration: simultaneous infiltration of carbon and nitrogen to form a surface alloy layer, combining the advantages of carburizing and nitriding to improve wear resistance and fatigue strength.
Material surface modification technology:
- Surface quenching: Through rapid heating and cooling, the steel surface is hardened to improve hardness and wear resistance.
- Sandblasting: Using high-speed jet of sand or iron particles to impact the surface of the steel pipe to change the surface state and improve some of the mechanical properties.
- Shot blasting: Impact the surface with steel shot to eliminate stress and improve fatigue strength.
Material surface conversion film technology:
- Phosphatization: through chemical treatment on the surface of the steel pipe to form a phosphate conversion film, improve corrosion resistance and lubricity.
- Blackening: Formation of a layer of dense oxide film, improve corrosion resistance and enhance the aesthetic appearance of the metal surface.
Material surface coating technology:
- Electroplating: metal plating is formed on the surface of the steel pipe by electrolysis, such as galvanization, chromium plating, etc., to improve corrosion resistance and abrasion resistance.
- Spraying and Plastic Spraying: Using spraying technology to cover the surface of steel pipe with plastic or powder coating to form a protective layer.
- Thermal Spraying: Metal or alloy powder is covered on the surface of steel pipe by thermal spraying technology, which is used to improve corrosion and abrasion resistance.
