Process for improving the drawability of a metal sheet or sheet blank
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United States of America Patent
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Nov 29, 1994
Grant Date -
N/A
app pub date -
Mar 11, 1992
filing date -
Sep 11, 1989
priority date (Note) -
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Abstract
The process is characterized by the fact that, before drawing, a salt of the alkaline metal group formed by Li, Na, and K, and of an anion which is chemically inert with regard to the essential metal of the sheet chose from among the phosphates is deposited on the drawing tools. To deposit the salt, preferably, a solution of said salt is applied to the tools or to the sheet metal.
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