Patent ID: 7850789
Filing Date: 2010-12-14
Classification: B22F,B23K,C22C,F28F,Y10T

Abstract:
1. A pasty composition for aluminum brazing, containing an aluminum-containing powder, wherein in a case where on a cumulative grading curve plotted in a graph in which Q volume % showing a percentage of a volume of particles, in the aluminum-containing powder, whose particle diameter is each less than or equal to D μm is represented with a horizontal axis showing D μm and a vertical axis showing Q volume %, the particle diameter D μm which corresponds to the Q volume % is indicated as D(Q) μm, D(50) μm is greater than or equal to 20 μm and less than or equal to 150 μm; and D(90) μm/D(10) μm is less than or equal to 5, wherein a mass percentage of particles, in the aluminum-containing powder, which pass through a screen mesh having an opening of 45 μm is less than or equal to 50%, and wherein a flowability of the aluminum-containing powder is less than or equal to 80 seconds/50 g.