Cobalt-base Alloy Single Plastic Extruder Bimetallic Screw Barrel 

Specifications

Material: 38CrMoAlA
Quality guarantee period:Calcium powder proportion
Diameter:20mm~300mm
Length/Diameter ratio:L/D=15~55

Technical Index

1.Hardness after hardening and tempering: HB280-320

2.Nitrided Hardness: HV850-1000

3.Nitrided case depth: 0.50-0.80mm

4.Nitrided brittleness: less than grade 2

5.Surface roughness: Ra 0.4

6.Screw straightness: 0.015 mm

7.Surface chromium-plating's hardness after nitriding: ≥900HV

8.Chromium-plating depth: 0.025~0.10 mm

9.Alloy Hardness: HRC50-65

10.Alloy depth: 0.8~2.0 mm

Materials & Processes

1.Quality 38CrMoAlA (JIS SACM645)

2.Quality Duplex Stainless Steels

3.42 CrMo (JIS SCM440)

4.40Cr

5.GH113

6.SKD11

7.SKD61 (H13)

8.Gr12MoV

9.Quality Powder Metallurgy Raw Materials

10.Cold/Thermal Spray Hard Metal Process

11.Advanced nitriding Process

12.Corrosion & Abrasion Resistance Bimetal Spraying Process