Method of making drill, bushings, pump seals and similar articles
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United States of America Patent
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Dec 30, 1980
Issued Date -
N/A
app pub date -
May 7, 1979
filing date -
May 7, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of making a drill bushing or a similar article, such as a pump seal, the method including metallurgically bonding tungsten carbide within a matrix to the steel blank by treating the combination in a vacuum, hydrogen, salt bath or other heating medium, making a suitable central opening, where required, in the tungsten carbide, heat treating and finishing the piece to the proper dimensions. The method of making such articles also includes metallurgically bonding tungsten carbide particles within a matrix which is also metallurgically bonded to a steel body, making a suitable opening, where necessary, leaving a thin coating of matrixed tungsten carbide to improve resistance to wear, heat and corrosion and then finishing the piece to the proper dimensions. The method may include metallurgically bonding tungsten carbide particles within a matrix bonded to a steel body while under the influence of forces tending to eliminate voids in the completed coating of matrixed tungsten carbide.
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