Claims
- 1. In a method of casting, hot rolling, and annealing non-heat treatable aluminum alloys, whereby a cast product is directly hot rolled to form a hot rolled product, and the hot rolled product is directly annealed to form a final annealed product, the improvement comprising:
(a) using latent heat in the hot rolled product while heating the hot rolled product through the use of an infrared heater from an elevated temperature caused by hot rolling to a final annealing temperature to form the final annealed product; and (b) controlling the infrared heating using a control based on at least one operating parameter.
- 2. The method of claim 1 comprising the step of protecting the surface of the final annealed product after the infrared heating step and then coiling the final annealed product to form a coiled product.
- 3. The method of claim 2 wherein the protecting step comprises one of oiling the surface of the final annealed product with a protective oil or a forming lubricant used in subsequent processing of the sheet or interleaving a protective material between surfaces of the final annealed product during the coiling step.
- 4. The method of claim 1 comprising the step of coiling the final annealed product.
- 5. The method of claim 1 wherein the elevated temperature ranges between about 400° F. and 700° F. and the final annealing temperature ranges between about 650° F. and 1100° F.
- 6. The method of claim 1 wherein the casting is belt casting, block casting or roll casting.
- 7. The method of claim 1 wherein the control uses the elevated temperature hot rolled product and one or more measures of the temperature of the final annealed product after infrared heating is completed, the gauge of hot rolled product being infrared heated, and the speed of the hot rolled product as it travels through the infrared heater.
- 8. The method of claim 1 wherein the product exiting the infrared heater is cooled by quenching using one of air, water, or a combination thereof or is cooled by natural air cooling.
- 9. The method of claim 1 comprising one of accumulating the hot rolled product prior to the infrared heating step and accumulating heated product and then coiling the accumulated product.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of U.S. Ser. No. 09/895,543, filed Jun. 29, 2001, entitled “Method and Apparatus For Casting, Hot Rolling and Annealing Non-Heat Treatable Aluminum Alloys”, which is a divisional of U.S. Ser. No. 09/408,608, filed Sep. 30, 1999, now U.S. Pat. No. 6,264,765 B1, granted Jul. 24, 2001, entitled “Method and Apparatus For Casting, Hot Rolling and Annealing Non-Heat Treatment Aluminum Alloys”.
Divisions (1)
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Number |
Date |
Country |
Parent |
09408608 |
Sep 1999 |
US |
Child |
09895543 |
Jun 2001 |
US |
Continuations (1)
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Number |
Date |
Country |
Parent |
09895543 |
Jun 2001 |
US |
Child |
10458059 |
Jun 2003 |
US |