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Foam Barrel Screw Your Location:Home > Products > Extruder > Foam Barrel Screw
Screw diameter:Ø20mm-Ø300mm
Aspect ratio:L/D=15~55 Tempering hardness:HB240°~280° Nitridation hardness:HV850°~1000° Nitration case depth:0.45~0.7mm Nitridation brittleness:≤二级 Surface roughness:Ra0.4 Screw straightness:0.015mm Chromium coating hardness after nitridation:HV≥900HV Chromium coating thickness:0.05~0.10mm Dual alloy depth:0.8~2.0mm Dual alloy hardness:HRC56°~65°
Material: High-quality steel ①38CrMoALA (JIS SACM645) ②316 stainless steel ③SKD61 Heat treatment: Nitriding treatment Hard chrome plating layer High-frequency quenching Spray corrosion resistance, wear-resistant bimetallic layer Vacuum hardening
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