Metal deforming – With cleaning – descaling – or lubrication of work or product – Lubricating
Patent
1992-06-22
1994-03-29
Larson, Lowell A.
Metal deforming
With cleaning, descaling, or lubrication of work or product
Lubricating
72370, 29446, B21D 3908
Patent
active
052974090
ABSTRACT:
A hole is formed in a high-strength steel part and a lubricant consisting essentially of one or more metal powders, preferably of nickel or molybdenum; a metal powder which is more reactive than the steel of the workpiece such as zinc; and an organic medium is applied. A forming mandrel having a generally cylindrical shape with a frustoconical portion on either end is centered over the hole. The mandrel is pushed through the hole at a rate such that the steel adjacent the hole is coldworked and its microstructure is transformed from an austenitic to a normal tempered martensitic structure.
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Beaman Danny L.
Christie Kenneth R.
Cordy Dennis M.
Graham Craig W.
Lightle Steven W.
Larson Lowell A.
McKeon Michael J.
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