Conical twin screw &barrel; 1,HardnessAfterHardending&Tempering : HB240~280 2,Nitrided Hardness : HV900~950
Technical Specification
1,Hardness After Hardending&Tempering : HB240~280
2,Nitrided Hardness : HV900~950
3,Nitrided Case Depth : 0.55~0.7mm
4,Nitrided Brittleness :Less Than Grade 1
5,Surface Roughness :Ra 0.4
6,Screw Straightness :0.015mm
7,Surface Chromium-Plating’s Hardness After Nitriding≥900HB
8,Chromium –plating Depth :0.05~0.10mm
9,Alloy Hardness : HRC55~62
10,Alloy Depth :1.5~2.0mm
Material&Processes
1,Quality 38CrMoALA
2,GH3#Steel
3,Quality Powder Metallurgy Raw Materials
4,Cold/Thermal Spray Hard Metal Process
5,Advanced nitriding Process
6,Corrosion & Abrasion Resistance Bimetal Spraying Process
7,Horniness screw (HTP1:abrasion HTP2:corrosion resistance,HTP3:abrasion and corrosion resistance
Conical twin screw for injection
