Twin alloy screw barrel
Processing range:
Double alloy screw: outer diameter: Φ 15mm - Φ 360mm; effective length: 10000mm
Double alloy pipe: inner diameter: Φ 14mm - Φ 200mm; effective length: 6000mm
Membrane density: 98-99.8%
Hardness: hv1100-1400c
Adhesion strength: above 10000psi
Bimetal barrel: base metal 38crmoaia, 40Cr, 42CrMo
Bimetal screw: base metal 38crmoaia, 31crmov9 (abroad)
Double gold level:
40% tungsten: Grade A
Grade B: 25% w
Grade C: 95% w
Alloy hardness:
HRC 56~65℃
Technical targets:
Depth of nitridation case: 0.5 ~ 0.8mm
Hardness of nitridation: 950 ~ 1020hv
Embrittlement of nitridation: less than grade 1
Roughness of the surface: RA 0.4um
Straightness Oh the screw: 0.015mm
Hardness of double alloys: hrc55-62
Depth of double alloys: > 2mm
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