conical twin screw and one barrel for extruder machine

Specifications 1.conical twin screw
2.material:alloy steel of high quality
3.processed to drawing according to your request Technical specification Hardness after hardening&tempering:HB240-280 Hardness of nitride layer:HV850-1000 Nitrided brittleness:less than grade 2 Surface roughness:Ra0.4 Screw straightness:0.015mm Surface chromiun-plating’s hardness after nitriding:≥900HB Alloy hardness:HRC50-65 Alloy depth:0.8-2.0mm   Meterial&processes Quality 38 CrMoALA 42CrMo CW6Mo5Cr4V2 9Cr18MoV Quality powder metallurgy raw materials Cold/thermal spray hard metal process Advanced nitriding process Corrosion & abrasion resistance bimetallic spraying process    The compression ratio of the screw canbe designed according to different products and mixtures.