Patent ID: 6749901
Filing Date: 2004-06-15
Classification: B23K,C23C

Abstract:
For use with a workpiece to be brazed by being heated by radiant energy to a predetermined braze temperature, said workpiece having a portion which is of significantly higher mass than the remainder of the workpiece and consequently subject to a temperature differential relative to the remainder of the workpiece during the braze process, a method to decrease said temperature differential, comprising the steps of,choosing a compatible surface material that has a melt temperature significantly higher than said predetermined braze temperature, thermally spraying said surface material onto said higher mass portion of said workpiece at spray parameters suitable to cause an enhanced surface roughness on said higher mass workpiece portion that is sufficient to in turn create an emissivity for said higher mass workpiece that is sufficiently enhanced to increase the energy absorption rate of said higher mass workpiece sufficiently to substantially reduce said temperature differential.