base Materials:

(1)38CrMoAlA(JIS SACM645)

(2)42CrMo(AISI 4140)

(3)4Cr5MoSi V1 (JIS SKD-61)

(4)9Cr18MoV

(5)HPT

Bimetallic alloy materials:

(1)Fe-based alloy

(2)Ni-based alloy/Deloro alloy

(3)Co-based alloy

(4)NiCo-based alloy

(5)Tungsten carbide/Wolfram carbide

Technics:

Heat treatment

High-frequency quenching

Nitriding treatment

Hard-chrome electroplating

Bimetallic alloy welding

Bimetallic alloy centrifugal casting

Technical parameter:

Nitrided layer depth:0.5-0.8mm

Nitrided hardness:900-1000HV

Nitrided brittleness: Less than grade 1

Surface roughness: Ra0.4

Linearity of screw: 0.015mm

Hard-chrome plating hardness after nitriding: ≥950HV

Chrome-plating layer depth:0.025-0.085mm

Bimetallic layer depth:3mm