| Model Number: | 3 |
|---|---|
| Brand Name: | Sheen |
| Place of Origin: | China (Mainland) |
| nitriding treatment: | alloy material |
Quick Details
Specifications
Bimetallic screw and barrel
Specification:
Screw diameter:Φ15mm-Φ360mm Screw max length:8000mm
Barrel diameter:Φ15mm-Φ360mm Barrel max length:7000mm
Bimetallic alloy material:
1.Ni-based alloy
2.Fe-based alloy
3.Co-based alloy
4.Nico-based alloy
5.Tungsten carbige
Bimetallic screw barrel processing method:
Plasma Alloy Coating Spraying or Wc/Co Whole spray welding
Bimetallic Barrel production method:Centrifugal Casting (Inlay Alloy)
Outstanding Features of Bimetallic Screw and Barrel:
1)Hardness HRC50-65
2)Outstanding corrosion-resistance.
3)Hardness layer reaches 1.5 m/m thickness.Hardness does not decrease with depth.
4)Hardness does not decrease under normal temperature.
5)Abrsion resistance / wear resistance on the hardened layer is 2~3 times higher than that treated by conventional heat treatment.
Screw barrel Material
|
Material |
Heat treatment |
|
38CrMoALA,SACM645,42CrMo,DIN1.8550,SAE8550 |
Nitrided treatment |
|
42CrMo, AISI4140 |
Hard-chrome plating |
|
Cr12Mov,SKD11,SKD61, |
High Frequency quenching |
|
4Cr5MoSiV1,SKD-11,SKD-61 |
Bimetallic frist,then nitrided |
|
YPT72, 4Cr5MoSiV1 |
HVOF |
|
GH113 |
Temepture:300-1400 |
Bimetallic material and production method way
Bimetallic material: Tungsten carbige 40%
Bimetallic screw production method is PTA.
We spray tungsten carbige 40% on the surface of screw flight.The thickness of bimetallic layer is 2.5mm The hardness of bimetallic layer is HRC58-72.
Another one way is Fully coated bimetallic layer.
Bimetallic barrel production method is centrifugal casting. The Thickness of bimetallic layer is single side 5mm on the barrel inner wall.
Another two way is groove bimetallic layer and SKD Bimetallic inner case.
The difference between these three ways:
1.The SKD is harder than bimtallic.
2.The centrifugal casting bimtal will be many small pores in the bimetallic layer,not stable enough.
3.The SKD is brought from professional steel company with quality guarantee,
4.The service life of SKD case will more half than the centrifugal casting bimrtalic barrel,but the price will be similar.
Below pictures will show you clearly
Base material 38CrMoALA chemical composition and main feture
This kind of material is made in China from SHANGHAI BAOSTEEL COMPANY.
|
C |
Si |
Mn |
S |
P |
Cr |
Al |
Ni |
Cu |
Mo |
|
0.35-0.42 |
0.20-0.45 |
0.30-0.60 |
<0.035 |
<0.035 |
1.35-1.65 |
0.70-1.10 |
<0.030 |
<0.030 |
0.15-0.25 |
Screw barrel technical details
|
Bimetallic Alloy Materials |
1)Fe-based alloy 2)Ni-based alloy/Deloro alloy 3)Co-based alloy 4)NiCo-based alloy 5)Tungsten carbide/Wolfram carbide |
|
Double-alloy level |
Level A - containing Tungsten of 40% Level B - containing tungsten of 25% Level C - containing tungsten of 9.5% |
|
Surface Treatment |
Heat Treatment High Frequency Treatment Nitriding treatment(120 Hours) Depth of Nitrided Layer: 0.5-0.8 mm Hardness of Nitrided Layer: 900-1020Hv (HRC56°-65°) Hard Chrome Plating treatment: Thickness of Hard Chrome Plating Layer: 0.05-0.10mm Hardness of Hard Chrome Plating Layer: ≥950HV Nickel alloy plating.treatment: Bimetallic Barrel/Cylinder: Centrifugal Casting (Inlay Alloy) Bimetallic Screw: Plasma Alloy Coating Spraying Depth of Bimetallic Layer: >2mm Hardness of Bimetallic Layer: HRC55°-72° |
|
Basic information |
Roughness of the surface:Ra0.4um Linearity of the screw: ≤0.015mm Linear axis limit: ≤0.02mm Hardness after Hardening & Tempering: HB240-280 Fragility of Nitration:≤Two class |
|
Material Application |
1)General Plastics 2)ABS,PA,PC,PE,PET,PP,PS,EVA,PU,PVC,U-PVC,etc 3)PA + GF(Glass Fiber) 4)Flame-resistant Reinforced Plastics 5)Modified Engineering Plastics 6)All kinds of Mixed Recycled Material(in Scrap or Granule),etc |
|
General Terms |
Means of transport: Ocean,Air,Express Production time: About 25 days after we receive the deposit and lead time will different according to the order quantity! |
Our screw and barrel processing flow
Customer order----Product design(customer drawing)---Production flow arrangement----Material Procurement---Hardening and tempering--
--Drilling---Rough turning---Rough thread rolling(Alloy spray welding)---alignment---Fine thread rolling---Mixing---Alignment---High frequency treatment---Alignment---Polishing---Grinding----120 hours Nittriding treatment---Acid piclking----Polishing---Chrome plating----O.D.Grinding---Packaging and Shipping.
Package details
1st, products (screws or barrels) will be brushed anti-corrosive oil
2nd,packed with film,brush oil
3rd,packed in the wooden case