Materials:
--- Main Base materials:
1.38CrMoAlA (SACM645);
2. SKD-61 (Special Tool Steel) 4Cr5MoSi V1;
3. 42CrMo (Ultrahigh StrengthSteel);
4. DC53 (Cold WorkDie Steel);
5. W6Mo5Cr4V2 (High-SpeedToolSteel 6542)
If not special request, our would choose 38CrMoAlA as the main base material.
--- Main Alloy Materials:
1. Ni-based alloy/Deloro alloy;
2. Tungsten carbide/Wolfram carbide;
3. NiCo-based alloy;
4. Fe-based alloy;
5. Co-based alloy;
Technical Parameters
Nitriding layer depth:0.5-0.8mm
Nitrided hardness:900-1000HV
Bimetallic layer depth: 0.8-3mm
Bimetallic hardness:57~64HRC
Hard-chrome plating hardness after nitriding:≥950HV
Chrome-plating layer depth:0.03-0.09mm
Surface roughness:Ra 0.4
Linearity of screw:0.015mm
Main Processing Technics
1. Heat treatment
2. Quenching
3. Nitriding treatment
4. Bimetallic alloy welding for screw
5. Bimetallic alloy centrifugal casting for barrel
6. Hard-chrome electroplating