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
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TIG
· High efficiency / Low cost/ high bonding strengt (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.
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Solid & salt bath boronizing,
· 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 structures.
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)
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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. The embedded carbide
tiles and 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 hardfacing.
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
■ High scratch resistance
■ High bonding strength (metallurgical bonding)
■ No cracks or porosities,corrosion and wear resistance
Valve trims-plug
■ Resistance to high temperature fluid erosion
■ Low coefficient of friction
■ No cracks or porosities,corrosion and wear resistance
