High wear Resistant Screw Barrel / Barrel and Feed ScrewRepolish

Material: Alloy-Steel of High-Quality
1) 38CrMoAlA(JIS SACM645)
2) 42CrMo(AISI 4140)
3) Cr12MOV(JIS SKD-11)
4) 4Cr5MoSiV1(JIS SKD-61)

Hardness of quenching and tempering: HB240? ~280?
Hardness of nitration: HV850? ~1000?
Depth of Nitrated Layer: 0.45~0.7mm
Fragility of nitration: ≤ Grade 2
Surface roughness: Ra0.4
Straightness: 0.015mm
Hardness of Cr-coating Layer: HV≥ 900HV
Nitrided layer thickness: 0.05~0.10mm
Thickness of Cr-coated Layer: 0.8~2.0mm
Hardness of bimetallic: HRC56? ~65? (Ni-based alloy)
Material: Quality alloy steel
1) 38CrMoALA(JIS SACM645)
2) 42CMo(JIS SCM440)
3) 9Cr18MOV
4) CW6Mo5Cr4V2
Heat-treatment:
Nitriding treatment
Electroplated hard-chrome finish
High-frequency quenching
Spray coating Bimetallic-alloy
Vacuum quenching

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