| Base Material | 1)38CrMoAlA(JIS SACM645);2)Cr12MOV(JISSKD-11) ;
3)4Cr5MoSiV1(JIS SKD-61) ;4)42CrMo(AISI4140) |
| Bimetallic Alloy Materials | 1)Fe-based alloy2)Ni-based alloy/Deloroalloy
3)Co-based alloy4)NiCo-based alloy
5)Tungsten carbide/Wolframcarbide |
| Double-alloylevel | Level A - containing Tungsten of40%
Level B - containing tungsten of 25%
Level C - containing tungsten of15% |
| Surface Treatment | Heat Treatment
High FrequencyTreatment
Nitriding treatment(120Hours):
Depth of Nitrided Layer: 0.5-0.8mm
Hardness of Nitrided Layer: 900-1020Hv(HRC56°-65°)
HardChrome Plating treatment:
Thickness of Hard Chrome Plating Layer:0.05-0.10mm
Hardness ofHard Chrome Plating Layer: ≥950HV
Nickel alloyplating.treatment:
Bimetallic barrel / Cylinder: Centrifugal Casting(Inlay Alloy)
BimetallicScrew: Plasma Alloy Coating Spraying
Depth of Bimetallic Layer: >2mm
Hardness of Bimetallic Layer: HRC55°-72°
Spraying corrosion wear-resisting dual metallayers |
4 . Materials
Screw and barrel materials used 38CrMoALA steel,the quenching and tempering,qualitative, nitrogen,a polishing process,refined,with long life,wear resistance,good corrosion resistance,etc.,it can be used to replace foreign advanced equipment and Equipment domestic high-performance devices.
Specifications: Φ20mm- Φ300mm
Aspect ratio: L / D = 15-65
Materials and Technology:
1. 38CrMoALA nitriding treatment
Nitriding depth: 0.5-0.8mm, nitriding hardness: HV > 920
2. 42CrMo plating: high frequency quenching + plating/bimetal PTA+ plating
Chromium plating hardness: greater than or equal to HV800, thickness 0.03-0.05mm, roughness Ra0.2um
3. SKD61 conditioning, vacuum quenching and integral hardening treatment
Hardness index: HRC > 55-58, straightness 0.015mm/m, roughness ra0.4um
4. 9Cr18Mov vacuum quenching, CNC circular grinding
Hardness index: HRC > 50-55, straightness 0.015mm/m, roughness ra0.4um
5. hard chromium plating Specifications:
Chrome plating thickness: 0.05-0.10mm, chrome layer hardness: HV≥960
