Durable, wear-resistant punches and dies
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United States of America Patent
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Issued Date -
Oct 19, 2006
app pub date -
Apr 18, 2005
filing date -
Apr 18, 2005
priority date (Note) -
Abandoned
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Abstract
Tough, wear-resistant dies derived from cold work steel formed by powder metallurgy processing and containing not greater than about 4% of tungsten. The dies desirably contain not greater than about 4% molybdenum by weight and at least about 5% chromium by weight. Disclosed also is a punch and die combination, the die being derived from cold work steel formed by powder metallurgy processing and containing not greater than about 4% of tungsten. The punch, which may also be derived from cold work steel formed by powder metallurgy processing and containing less than about 4% by weight of tungsten, may have a formula different from that of the die. A punching method is also disclosed.
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