Base materials

1)38CrMoAlA (JIS SACM645)      2)42CrMo (AISI 4140)   

3)4Cr5MoSi V1 (JIS SKD-61)       4)DC53 (JIS G4404)

5)Cr12MoV (SKD11)                     6)9Cr18MoV 

Bimetallic alloy materials

1)Ni-based alloy/Deloro alloy     2)Fe-based alloy 

3)Co-based alloy                        4)NiCo-based alloy

5)Tungsten carbide/Wolfram carbide

Processing technics

Heat treatment

High-frequency quenching

Nitriding treatment

Bimetallic alloy welding

Bimetallic alloy centrifugal casting

Hard-chrome electroplating

Technical parameters

Nitriding layer depth: 0.5-0.8mm

Nitrided Hardness: 900-1000HV (HRC 55-65)

Nitrided brittleness: Less than grade 1

Surface roughness: Ra 0.4

Linearity of screw: 0.015mm

Hard-chrome plating hardness after nitriding: ≥950HV

Chrome-plating layer depth: 0.03-0.1mm

Bimetallic layer depth: 3 mm

Bimetallic layer hardness: HRC 55-70

Base Materials

1)38CrMoAlA(JIS SACM645)      2)42CrMo(AISI 4140)   

Processing Technics

Heat treatment

High-frequency quenching

Nitriding treatment

Ionic nitriding treatment

Bimetallic alloy weldingt

Technical Parameter

Nitriding layer depth: 0.3-0.7mm

Nitriding hardness: 850-950HV

Nitriding brittleness: Less than grade 1

Surface roughness: Ra0.4

Linearity of screw: 0.015mm