Process for manufacturing semi-finished products from sintered refractory metal alloys
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United States of America Patent
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Apr 7, 1992
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N/A
app pub date -
Sep 1, 1990
filing date -
Nov 9, 1987
priority date (Note) -
Expired
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Abstract
In a process for manufacturing semi-finished products from sintered refractory metal alloys with a stacked microstructure, the sinter feed reshaped by at least 85% is subjected prior to recrystallization annealing to an intermediate annealing for at least 20 minutes at a temperature not less than 700.degree. C. and not greater than that at which no further recrystallization occurs. Following this intermediate annealing, the hot feed is deformed by a further 3% to 30%. The process makes it possible to manufacture semi-finished products with a good stacked microstructure and of substantially greater dimensions, or of the same dimensions and a substantially better stacked microstructure, than can be obtained with known manufacturing processes.
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