Method of and apparatus for casting and hot-forming copper metal and the copper product formed thereby
First Claim
1. In a method of continuously casting and hot-forming copper containing as much as from about 20 ppm to about 200 ppm impurities wherein the copper is cast into a cast copper bar in a mold, extracted from the mold and hot-formed at a hot-forming temperature by a plurality of sequential compressions, the improvement comprising the steps of:
- cooling the cast copper bar while in the casting mold to a first temeprature below which the bar is hot-formed whereby the cast copper bar is solidified into a sound casting;
extracting the sound casting from the casting mold;
preheating the sound casting to a second temperature higher than the first temperature and prior to said hot-forming step; and
hot-forming the preheated sound casting into a hot-formed copper product with no or substantially no cracking of the bar.
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Accused Products
Abstract
A method of and apparatus for continuously casting a high impurity content molten metal in a casting means and the product formed thereby. The method includes the steps of cooling said metal while in said casting means to a temperature resulting in a sound cast bar, extracting the sound cast bar from said casting machine, advancing the sound cast bar to pre-heating means, heating the sound cast bar to a hot-forming temperature, passing the cast bar at a hot-forming temperature from the pre-heating means to a hot-forming means, and hot-forming the cast bar into a wrought product without the cat bar cracking, even when the cast bar has an impurity content of from about 20 to about 200 ppm.
16 Citations
9 Claims
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1. In a method of continuously casting and hot-forming copper containing as much as from about 20 ppm to about 200 ppm impurities wherein the copper is cast into a cast copper bar in a mold, extracted from the mold and hot-formed at a hot-forming temperature by a plurality of sequential compressions, the improvement comprising the steps of:
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cooling the cast copper bar while in the casting mold to a first temeprature below which the bar is hot-formed whereby the cast copper bar is solidified into a sound casting; extracting the sound casting from the casting mold; preheating the sound casting to a second temperature higher than the first temperature and prior to said hot-forming step; and hot-forming the preheated sound casting into a hot-formed copper product with no or substantially no cracking of the bar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification