Heat resistant high strength composite structure of hard metal particles in a matrix,and methods of making the same
Abstract
Abstract A HIGH STRENGTH STRUCTURE MADE OF HARD METAL PARTICLES, SUCH AS METAL CARBIDE PARTICLES, BRAZED TO EACH OTHER IN A POROUS LATTICE OF A FIRST BRAZING METAL OR ALLOY, THE VOIDS AND SPACES IN THE BRAZING METAL OR ALLOY BEING FILLED BY A SOLIDIFIED SECOND BRAZING METAL OR ALLOY OF A MELTING POINT LOWER THAN THE MELTING POINT OF THE FIRST BRAZING METAL OR ALLOY. THE SECOND BRAZING METAL OR ALLOY MAY ALSO CONTAIN A DISPERSION OF HARD METAL PARTICLES, SUCH AS METAL CARBIDE PARTICLES, GENERALLY OF A SMALLER SIZE THAN THAT OF THE ORIGINAL HARD METAL PARTICLES.THE STRUCTURE IS MADE BY MIXING A PREDETERMINED PROPORTION OF HARD METAL PARTICLES WITH THE FIRST BRAZING METAL OR ALLOY IN THE FORM OF A POWDER, AND BY SINTERING IN A FURNACE SO AS TO OBTAIN A SUBSTANTIALLY POROUS STRUCTURE, FOLLOWED BY A SECOND PASS IN THE FURNACE OF THE POROUS STRUCTURE COVERED WITH THE SECOND BRAZING METAL OR ALLOY IN A POWDER FORM SO AS TO IMPREGNATE THE POROUS STRUCTURE WITH THE MELTED SECOND BRAZING METAL OR ALLOY.
Inventors
- 👤 Charles F Wendler
- 👤 Charles S Baum
Bibliographic Details
Claims Analysis
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