Surface Treatment

To meet the special requirements of wear resistance,high temperature resistance,acid and alkali corrosion resistance,high strength and high hardness,it is necessary to perform surface enhancement on tools and the surfaces of parts.The treatment makes the parts suitable for severe working conditions of various industries like machinery manufacturing,aerospace and navigation,transportation energy,and petrochemicals.

Seed has a variety of surface enhancement technologies.Among them,we are specialized in PTA overlay welding,HVOF Spray,TIG,flame cladding,vacuum cladding,solid/salt bath boronizing,and thermal diffusion hardening.Seed is committed to help its customers with solutions for different working conditions.

PTA overlay welding

·Highly automated equipment.Low dilution rate;High bonding strength(Metallurgical bonding between base metal&hardfacing);Small HAZ;Wide application range of powder materials

TIG

·High efficiency;Low cost;high bonding strength(Metallurgical bonding 

between base metal&hard layer);Impact resistance;Flexible in operation.

Flame spray

·High efficiency;High bonding strength(Metallurgical bonding

between base metal&hard layer);Low cost;dense coating

Vacuum cladding

·High efficiency;High bonding strength(Metallurgical bonding 

between base metal&hard layer);Dense coating;Used for irregular structures.

·High efficiency;Low cost;High hardness;Used for irregular shapes;

Composite thermal diffusion

·Ultra-high hardness; Gradient distribution; Excellent resistance to

heavy load strain; Used for irregular structural;

HVOF

·Reliable equipment (Praxair JP8000) & process; Dense coating; 

No thermal influence on the substrate; 

Excellent bonding strength (mechanical bonding of the substrate and the hard surface)

Application and case study for PTA overlay welding

Application Fields of PTA 

PTA technology is mainly used in working conditions where abrasive wear and impact pressure coexist. Carbide inserts or cast tungsten carbide particles are evenly distributed in the nickel-based or cobalt-based binder phase, which greatly improves the wear resistance and corrosion resistance of the hard surface layer.

Drilling tool-radial bearing, Adjustable housing

■ High bonding strength (metallurgical bonding)

■ Shallow heat affected zone

■ Desirable microstructure and excellent mechanical properties of the substrate

■ Almost no cracks and porosities

■ Excellent corrosion resistance and wear resistance

Plunger Pump-Plunger

Valve trims-plug