Screw &barrel of an extruder machine 1,Hardness After Hardending&Tempering : HB240~280 2,Nitrided Hardness
1,Standards of single screw and cylinder of exturder machine:20mm--300mm,
2,Ratio of length to siameter :L/D=15--55
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,Qulity Duplex Stainless Steels
3,GH3#Steel
4,Quality Powder Metallurgy Raw Materials
5,Cold/Thermal Spray Hard Metal Process
6,Advanced nitriding Process
7,Corrosion & Abrasion Resistance Bimetal Spraying Process
8,Horniness screw (HTP1:abrasion HTP2:corrosion resistance,HTP3:abrasion and corrosion resistance)
screw of an extruder machine
