Metal founding – Process – With measuring – testing – inspecting – or condition determination
Patent
1987-02-02
1988-07-05
Godici, Nicholas P.
Metal founding
Process
With measuring, testing, inspecting, or condition determination
295276, 295277, 134 3, 134 41, 164476, 164477, B22D 1112, B22D 1114, B22D 1116
Patent
active
047548037
ABSTRACT:
A process for producing copper rod having an improved surface smoothness and substantially no surface oxides, which rod is suitable for drawing or rolling into wire, is disclosed. The process comprises the steps of forming a bath of molten pure copper, casting the molten copper into a cast bar, conditioning the bar for hot-rolling, hot-rolling the bar to form a hot-rolled rod, cooling the hot-rolled rod and chemically shaving and pickling the hot-rolled rod. The chemical shaving and pickling step is performed with a solution containing controlled concentrations of sulfuric acid and hydrogen peroxide. Both the solution and the rod are maintained at elevated temperatures and the duration of the reaction is controlled. The interrelated process variables are regulated so that substantially all of the surface oxides and a desired amount of copper are removed from the surface of the hot-rolled rod.
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Chia, E. H. et al., "Torsional Stress Tests for Copper Rod: Indicator of Quality and Performance," Wire Journal International, Jun. 1986, pp. 57-67.
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Escobar, Jr. Benjamin A.
Farraro John T.
Montes Gilbert
Wahner Lester J.
Batten, Jr. J. Reed
Degling Donald E.
Godici Nicholas P.
Phelps Dodge Industries, Inc.
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