Screw blade with hard alloy build-up welding layer

Screw blade with hard alloy build-up welding layer

  • CN 2,551,345 Y
  • Filed: 06/19/2002
  • Issued: 05/21/2003
  • Est. Priority Date: 06/19/2002
  • Status: Active Grant
First Claim
Patent Images

1. the helical blade that has weld-deposited cladding, helical blade (2) are wound in helix core pipe (3) outer wall in a spiral manner, it is characterized in that along helical blade (2) outward flange weld-deposited cladding (1) being set.

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