Hard metal alloy with surface region enriched with tantalum, niobium, vanadium or combinations thereof and methods of making the same
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United States of America Patent
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Nov 15, 1988
Issued Date -
N/A
app pub date -
Jun 19, 1986
filing date -
Aug 19, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a method of producing a hard metal alloy with a surface region enriched with a first component being at least one of the carbides, nitrides and carbonitrides of tantalum, niobium, vanadium or combinations thereof wherein the atomic percent ratio of a second component present in the alloy and being selected from the carbides, nitrides and carbonitrides of titanium, hafnium and zirconium and combinations thereof to the first component is in the range of from 0 to about 1.5. Also disclosed are hard metal alloys having said surface enriched region which can be used to produce cutting tools which are resistant to galling and crater formation.
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