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As our special advantage products,food screws used for inflating machines to make leisure food like rice bread,rolling snack,etc.
Screws for inflating food extruders
Double screw extruders: Dia30--85mm
Single: Dia65--100mm

The compression ratio of the screw can be designed according to different products and mixtures.




Technical Index
1.Hardness after hardening and tempering: HB280-320
2.Nitrided Hardness: HV850-1000
3.Nitrided case depth: 0.50-0.80mm
4.Nitrided brittleness: less than grade 2
5.Surface roughness: Ra 0.4
6.Screw straightness: 0.015 mm
7.Surface chromium-plating's hardness after nitriding: ≥900HV
8.Chromium-plating depth: 0.025~0.10 mm
9.Alloy Hardness: HRC50-65
10.Alloy depth: 0.8~2.0 mm
Materials & Processes
1.Quality 38CrMoAlA (JIS SACM645)
2.Quality Duplex Stainless Steels
3.42 CrMo (JIS SCM440)
4.40Cr
5.GH113
6.SKD11
7.SKD61 (H13)
8.Gr12MoV
9.Quality Powder Metallurgy Raw Materials
10.Cold/Thermal Spray Hard Metal Process
11.Advanced nitriding Process
12.Corrosion & Abrasion Resistance Bimetal Spraying Process
CNC Milling Machine

7.2 meters pit tempering furnace

7 meters pit nitriding furnace

Corner of the workshop

Quality Control
1.Management System:ISO9001:2008
2.Advanced quality inspection center
3.Digital vickers hardness tester
4.Portable’s hardness machine
5.Metal ultrasonic flaw detector

Packing

office building


Welcome your inquiry about any more info you like.
Skype: hesainv
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