الوصف

Specification:
Conical twin screw
Material: *8CrMoALA(JIS SACM**5); 4Cr5MoSiv1(JIS SKD*1)
Tempering hardness:HB******0
Nitriding hardness:HV*******0
Nitriding thickness:0.**0.8mm
Roughness of the surface:Ra0.4um
Screw diameter:Φ*5/**-Φ*2/**8
Fragility of nitration:≤2class

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******0 hours Nittriding treatment**-Acid piclking***-Polishing**-Chrome plating***-O.D.Grinding**-Packaging and
Shipping

Package details
 products (screws or barrels) will be brushed anti-corrosive oil 
 packed with film,brush oil
 packed in the wooden case Bimetallic Conical Twin Scerw& Barrel for PVC Extrusion Machine
Delivery:*0 working upon recepit of *0% deposit

Surface Treatment

• Heat Treatment
• High Frequency Treatment
• Nitriding treatment(**0 Hours)

• Hard Chrome Plating treatment:

• Nickel alloy plating.treatment:

• *8CrMoAlA(JIS SACM**5) 
• Cr*2MOV(JIS SKD**1) 
• 4Cr5MoSiV1(JIS SKD**1) 
• *2CrMo(AISI ***0) 

• Fe-based alloy  
• Ni-based alloy/Deloro alloy
• Co-based alloy
• NiCo-based alloy
• Tungsten carbide/Wolfram carbide