Patent ID: 6254704
Filing Date: 2001-07-03
Classification: B22F,C22C,C23C

Abstract:
A method for preparing a thermal spray powder comprising:providing powder particles each consisting essentially of nickel, chromium and carbon, the chromium consisting of a first portion and a second portion, the nickel being alloyed with the first portion in an alloy matrix, the second portion and the carbon being combined into chromium carbide substantially as Cr.sub.3 C.sub.2 or Cr.sub.7 C.sub.3 or a combination thereof, and the chromium carbide being in the form of precipitates essentially between 0.1 .mu.m and 5 .mu.m distributed substantially uniformly in the alloy matrix; andheat treating said particles to increase the proportion of Cr.sub.3 C.sub.2 in the powder.