Shanghai Bei Yang Plastic Machinery Limited company CO.,LTD.
We always adhere to the sustainable development of quality first, energy saving and emission reduction, automation and technicalization.
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Conical twin screw & barrel depth of nitration layer 0.05-0.08mm
Material
High quality alloy-steel
1) 38CrMoAIA(JIS SACM645)
2) 9Cr18MoV
Heat-Treatment
Nitriding treatment
Spray bimetallic coating
Quideline of technique:
Depth of nitration layer:0.05-0.08mm
Hardness of nitration:900-1000V
Fragility of nitration:less than grand one
Roughness of the surface:Ra0.4
Linearity of the screw:0.015mm/m
The surface hardness of chrom plating after nitrogention:more than 950hv
Chrome-plating layer thickness:0.025-0.085mm