Feature :
a. Advanced Nitriding Technology
b. Anti-corrosion and Wear-resisting Duplex Metal Spraying technology
c. we uses special alloy powders being sprayed and welded on the screw , and uses different alloy and welding methods for the screw of different functions.
Main parameters:
Product | 38CrMoAIA screw and barrel for extruder machine |
Material | 38 CrMoAlA(JIS SACM645); 42CrMo(JIS SCM440) |
Hardness of nitrogen treatment | HV900°~1100° |
Tempering hardeness | HV240 ° ~280° |
Depth of nitrogen layer: | 0.6~0.8mm |
Nitrided Brittleness | above 1 stage |
Surface Roughness | Ra0.4 um |
Screw straightness | 0.015mm |
Hardess of surface chromium-plating after Nitriding | HV≥950HV |
Chromium plating Depth | 0.025-0.085mm |
Alloy Depth | 2.5mm-4mm |
Alloy hardness | HRC62°~72° |
Heating-treatment | nitrogen ,electroplated hard -chrome finish,high frequency quenching |