The product specification
Screw: 15 mm in diameter-250 mm diameter screw
Screw length: 300 mm to 8000 mm screw length
Machine tube diameter 40 mm to 400 mm: barrel outer diameter
Length-diameter ratio: L/D: 10-46
Product synopsis:
Screw screw:
1. General nitriding screw nitriding screw with (SACM645)
2. Tooth top spraying alloy welding double top gear spray-welding bimetallic screw
3. A complete coverage of tungsten steel screw wlfram steel screw
4. All the hard series screw scries: there NPT1, NPT2, NOT3
5. Ceramic membrane surface formation, diamond film-screw surface on ceramic diamond said
For stove barrel
1. With ordinary nitriding nitriding barrel (SACM645)
2. The hole centrifugal casting alloy centrifugal casting bimetallic barrel (points) and the ABC
3. All the hard in series of series barrel (NPT1 there, NPT2NPT3)
Technology index
Surface hardness: HV: 290
Nitriding hardness: HV850-1000
Nitriding depth: 0.45 0.7 mm
Nitriding brittle: more than level 1
Screw the straightness: 0.015 mm
After nitriding chromium plating surface hardness: 900 HV:
Chromium plating thickness: 0.05 0.1 mm
Double alloy hardness: 60-70
Alloy depth: 0.8 2.0 mm