Patent ID: 6883701
Filing Date: 2005-04-26
Classification: B23K,Y10T

Abstract:
1. A method for the manufacture of heat exchangers and apparatuses having brazed parts, comprising the steps of: (a) juxtaposing at least two parts to define one or more joints therebetween; (b) supplying to said one or more joints an iron/chromium brazing filler metal; (c) heating said juxtaposed parts and said brazing filler metal under appropriate conditions in order to melt said brazing filler metal; (d) cooling said juxtaposed parts and said brazing filler metal to produce a solid brazed joint of a brazed assembly; and (e) conditioning said brazed parts by exposure to an elevated temperature in an oxygen-containing atmosphere for a time sufficient to substantially reduce the amount of nickel leaching into water or other fluids contacting the brazed joint of said brazed assembly.