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Flame-sprayed ferrous alloy enhanced boiling surface

  • US 4,663,243 A
  • Filed: 10/28/1982
  • Issued: 05/05/1987
  • Est. Priority Date: 10/28/1982
  • Status: Expired due to Fees
First Claim
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1. A method of depositing on a metal substrate a porous ferrous alloy boiling surface having macropores therein to enhance boiling which method comprises the steps of:

  • (a) aligning an oxy-fuel spray gun in relationship to said substrate such that the centerline distance between the nozzle of said spray gun and said substrate is from about 4 inches (10.2 cm) to about 6 inches (15.2 cm) and said spray gun is inclined so that the angle of flame spraying is from about 30°

    to about 50°

    ;

    (b) entraining ferrous alloy powder in an inert gas stream;

    (c) injecting said inert gas stream into a reducing oxy-fuel flame which is dispensed from the nozzle of said spray gun; and

    (d) providing relative movement between said oxy-fuel flame and said substrate so as to apply at least one layer of ferrous alloy powder onto said substrate.

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