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Base Materials:

1)38CrMoAlA(SACM 645)

2)42CrMo(AISI 4140)

3)Cr12MoV(SKD11)

4)4Cr5MoSiV1(SKD61)

5)9Cr18MoV

6)40Cr

Bimetallic Alloy Materials:

1)Fe-based alloy

2)Ni-based alloy

3)Co-based alloy

4)Tungsten carbide

Processing Technology: 

Heat treatment

High-frequency quenching 

Nitriding treatment

Hard-chrome electroplating 

Bimetallic alloy welding

Technical Parameter:

Nitrided layer depth:0.50-0.80mm

Nitrided hardness: 900-1100HV 

Nitrided brittleness: Less than 2 level

Surface roughness: Ra 0.4

Linearity of screw: 0.015mm

Hard-chrome plating hardness after nitriding: ≥950HV

Chrome-plating layer depth: 0.025~0.10mm 

Bimetallic layer depth: 2 mm

Bimetallic hardness: HRC50-65

Fully hard screw HPT series: 

1)HPT1 Wear resistant type: Apply to below 30% glass fibre, bakelite, PC lucency etc;

2)HPT2 Corrosion resistant type: Apply to below 60% glass fibre, heatproof, high-pressure proof and high-speed proof; PC+glass fibre, Nylon+glass fibre;

3)HPT3 Wear resistant and Corrosion resistant type: Apply to non-stick raw materials, magnetic powder, ceramic powder, Aluminum magnesium powder, iron powder, copper powder;

4) HPT4 Wear resistant and Corrosion resistant type: Apply to stickiness raw materials, halogen free plastics.