Method of making a cemented carbide tool and a cemented tool
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United States of America Patent
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Dec 19, 2006
Grant Date -
May 13, 2004
app pub date -
Nov 23, 2001
filing date -
Nov 23, 2000
priority date (Note) -
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Abstract
According to the present invention there is now provided a cemented carbide body provided with at least one wear resistant layer, which body contains a toughness increasing surface zone. Increase in toughness is obtained due to the presence of a surface zone having increased WC grain size and/or increased Co content. The invention is most suitable for WC--Co cemented carbides. A method for making such bodies is also disclosed.
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