TH23659B - Method for manufacturing aluminum alloy fin materials for brazing welding. - Google Patents

Abstract

DC60 is a method for producing aluminum alloy fin materials for brazing welding. The process involves: ingot sheet formation by casting molten aluminum alloy using a continuous, paired roller rolling method; and cold rolling of the ingot sheet to prepare the fin material. The aluminum alloys used contain specified proportions of Mn, Fe, and Si, with the remainder being Al and unavoidable impurities. Continuous, paired roller rolling is performed under various conditions of molten alloy temperature, roller load, casting speed, and ingot sheet thickness. Two or more intermediate annealing operations are performed in the middle of the cold rolling process. The intermediate annealing consists of a final intermediate annealing in a batch heating furnace at a specified temperature range, thereby adjusting the specified cold rolling speed after the final intermediate annealing. The method for producing aluminum alloy fin materials for brazing involves the following steps: ingot sheet formation by casting molten aluminum alloy using a continuous roller rolling method, and cold rolling of the ingot sheet to prepare the fin material. The aluminum alloys used contain specified proportions of Mn, Fe, and Si, with the remainder being Al and unavoidable impurities. Continuous roller rolling is performed under various conditions of molten alloy temperature, roller load, casting speed, and ingot sheet thickness. Two or more intermediate annealing processes are performed in the middle of the cold rolling process. The intermediate annealing consists of a final intermediate annealing in a batch heating furnace at a specified temperature range, thereby adjusting the specified cold rolling speed after the final intermediate annealing.

Claims (32)

1. The method for producing aluminum alloy fin materials for brazing welding consists of the following steps: ingot formation by casting molten aluminum alloy using continuous rolling with matching rollers; and cold rolling of the ingot to prepare the fin material, with an aluminum alloy containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, with the remainder being Al and unavoidable impurities, where the continuous rolling with matching rollers is performed under the following conditions: The molten liquid temperature is 700 to 900°C, the roller load is 5,000 to 15,000 Nm per 1 mm wide ingot sheet, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing processes are performed in the middle of the cold rolling process. This intermediate annealing includes a final intermediate annealing using a batch heating furnace at temperatures of 300 to 450°C and at a temperature that prevents complete recrystallization. Therefore, the cold rolling rate after the final intermediate annealing is adjusted to 10 to 60%. 2. Method for the fabrication of aluminum alloy fin materials for brazing welding as claimed in claim 1, whereby the intermediate annealing, except for the final annealing, is performed using a heating furnace. 3. Aluminum alloy fin material for brazing, where the crystalline structure of the fin material, obtained by a manufacturing method as claimed in claim 1, contains fibrous material. 4. Method for the production of aluminum alloy fin material for brazing, comprising the steps of: egot sheet formation by casting molten aluminum alloy by continuous rolling with matching rollers; and cold rolling of the egot sheet to prepare the fin material, with an aluminum alloy containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, as well as at least one type of Zn 3.0% by mass or less, In 0.3% by mass or less, and Sn 0.3% by mass or less, with the remainder being A1 and unavoidable impurities, where the continuous rolling with matching rollers is performed under the following conditions: The molten liquid temperature is 700 to 900 °C, the roller load is 5,000 to 15,000 Nm per 1 mm wide ingot sheet, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing treatments are performed in the middle of the cold rolling process. This intermediate annealing includes a final intermediate annealing using a batch heating furnace at temperatures of 300 to 450 °C, at a temperature that prevents complete recrystallization. Therefore, the cold rolling rate is adjusted to 10 to 60% after the final intermediate annealing. 5. Method for the fabrication of aluminum alloy fin materials for brazing welding as claimed in claim 4, whereby the intermediate annealing, except for the final annealing, is performed using a heating furnace. 6. Aluminum alloy fin material for brazing, where the crystalline structure of the fin material, obtained by the manufacturing method as claimed in claim 4, contains fibrous material. 7. Method for producing aluminum alloy fin materials for brazing, which includes the following steps: forming of the fin plate by casting molten aluminum alloy using a continuous rolling method with matching rollers; And cold rolling of igotte sheets for fin preparation, with aluminum alloys containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, as well as at least one type of Cu 0.3% by mass or less, Cr 0.15% by mass or less, Ti 0.15% by mass or less, Zr 0.15% by mass or less, and Mg 0.5% by mass or less, with the remainder being Al and unavoidable impurities, where such continuous rolling using matching rollers is carried out under the following conditions The molten liquid temperature is 700 to 900 °C, the roller load is 5,000 to 15,000 N/s per 1 mm wide ingot sheet, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing treatments are performed in the middle of the cold rolling process, with this intermediate annealing including a final intermediate annealing in a batch heating furnace at a temperature of 300 to 450 °C, and at a temperature that prevents complete recrystallization, thus adjusting the cold rolling rate after the final intermediate annealing to 10 to 60%. 8. Method for the production of aluminum alloy fin materials for brazing as claimed in claim 7, whereby the intermediate annealing, except for the final annealing, is performed using a heating furnace. 9. Aluminum alloy fin material for brazing, where the crystalline structure of the fin material, obtained by the manufacturing method as claimed in claim 7, contains fibrous material. 10. A method for producing aluminum alloy fin materials for brazing, consisting of the following steps: shaping the fin plate by casting molten aluminum alloy. By continuous rolling method using matching rollers: and cold rolling of igotte sheets for fin material preparation, with aluminum alloys containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, at least one type of Zn 3.0% by mass or less, In 0.3% by mass or less, and Sn 0.3% by mass or less, as well as at least one type of Cu 0.3% by mass or less, Cr 0.15% by mass or less, Ti 0.15% by mass or less, Zr 0.15% by mass or less, and Mg 0.15% by mass or less, with the remainder being A1 and unavoidable impurities, The continuous rolling process using matching rollers is carried out under conditions of molten liquid temperature of 700 to 900 °C, roller load of 5,000 to 15,000 N/s per 1 mm wide ingot sheet, casting speed of 500 to 3,000 mm/min, and ingot sheet thickness of 2 to 9 mm. Furthermore, two or more intermediate annealing processes are performed in the middle of the cold rolling process, including a final intermediate annealing with batch heating at temperatures of 300 to 450 °C, at a temperature that prevents complete recrystallization. Therefore, the cold rolling rate after the final intermediate annealing is adjusted to 10 to 60%. 11. Method for the production of aluminum alloy fin materials for brazing welding as claimed in claim 10, where the intermediate annealing, except for the final annealing, is performed using a heating furnace. 12. Aluminum alloy fin material for brazing, where the crystalline structure of the fin material, obtained by the manufacturing method described in claim 10, consists of fibrous material. 13. A method for producing aluminum alloy fin material for brazing, comprising the steps of: shaping the egot sheet by casting the molten aluminum alloy by continuous rolling with matching rollers; and cold rolling the egot sheet to prepare the fin material, with an aluminum alloy containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, with the remainder being Al and unavoidable impurities, where the continuous rolling with matching rollers is performed under the following conditions: The molten liquid temperature is 700 to 900 °C, the roller load is 5,000 to 15,000 N/s per 1 mm wide ingot sheet, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. One or more intermediate annealing is performed in the middle of the cold rolling process, so that the final cold rolling rate becomes 10 to 95%, and additional annealing with batch heating is performed after the final cold rolling, at a final sheet thickness in the temperature range of 300 to 450 °C, and at a temperature that prevents complete recrystallization. 14. Method for the fabrication of aluminum alloy fin materials for brazing welding as claimed in claim 13, where the intermediate annealing, except for the final annealing, is performed using a heating furnace. 15. Aluminum alloy fin material for brazing, where the crystalline structure of the fin material, obtained by a manufacturing method as claimed in claim 13, consists of fibrous material. 16. A method for producing aluminum alloy fin material for brazing, comprising the steps of: ingot sheet formation by casting molten aluminum alloy by continuous rolling with matching rollers; and cold rolling of the ingot sheet, to prepare the fin material, with an aluminum alloy containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, as well as at least one kind of 3.0% by mass or less of Zn, 3.0% by mass or less of In, and 0.3% by mass or less of Sn, with the remainder being A1 and unavoidable impurities, where the aforementioned continuous rolling with matching rollers is performed. This is achieved under conditions of molten liquid temperature of 700 to 900 °C, roller load of 5,000 to 15,000 N/s per 1 mm wide ingot sheet, casting speed of 500 to 3,000 mm/min, and ingot sheet thickness of 2 to 9 mm, where two or more intermediate annealing are performed in the middle of the aforementioned cold rolling process, so that the final cold rolling rate becomes 10 to 95%, and where additional annealing with batch heating is performed after the final cold rolling, at a final sheet thickness in the temperature range of 300 to 450 °C, and at a temperature that will not allow complete recrystallization. 17. Method for the fabrication of aluminum alloy fin materials for brazing welding as claimed in claim 16, where the intermediate annealing, except for the final annealing, is performed using a heating furnace. 18. Aluminum alloy fin material for brazing, where the crystalline structure of the fin material, obtained by the manufacturing method described in claim 16, consists of fibrous material. 19. A method for producing aluminum alloy fin materials for brazing, comprising the following steps: ingot formation by casting molten aluminum alloy using a continuous rolling method with matching rollers; And cold rolling of igotte sheets for fin material preparation, with aluminum alloys containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, as well as at least one type of Cu 0.3% by mass or less, Cr 0.15% by mass or less, and Ti 0.15% by mass or less, Zr 0.15% by mass or less, and Mg 0.5% by mass or less, with the remainder being A1 and unavoidable impurities, where such continuous rolling using matching rollers is carried out under the following conditions The molten liquid temperature is 700 to 900 °C, the roller load is 5,000 to 15,000 N/s per 1 mm wide ingot sheet, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing treatments are performed in the middle of the cold rolling process, so that the final cold rolling rate becomes 10 to 95%, and additional annealing with batch heating is performed after the final cold rolling, at a final sheet thickness in the temperature range of 300 to 450 °C, and at a temperature that prevents complete recrystallization. 20. Method for the fabrication of aluminum alloy fin materials for brazing, as claimed in claim 19, whereby the intermediate annealing, except for the final annealing, is performed using a heating furnace. 21. Aluminum alloy fin material for brazing, where the crystalline structure of the fin material, obtained by the manufacturing method described in claim 19, consists of fibrous material. 22. Method for producing aluminum alloy fin materials for brazing, which includes the following steps: forming of the fin plate by casting molten aluminum alloy using a continuous rolling method with matching rollers; And cold rolling of ingot sheets for fin material preparation, with aluminum alloys containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, at least one kind of Zn 3.0% by mass or less, In 0.3% by mass or less, and Sn 0.3% by mass or less, as well as at least one kind of Cu 0.3% by mass or less, Cr 0.15% by mass or less, Ti 0.15% by mass or less, Zr 0.15% by mass or less, and Mg 0.15% by mass or less, with the remainder being A1 and unavoidable impurities, The continuous rolling using matching rollers is performed under conditions of molten liquid temperature of 700 to 900 °C, roller load of 5,000 to 15,000 N/s per 1 mm wide ingot sheet, casting speed of 500 to 3,000 mm/min, and ingot sheet thickness of 2 to 9 mm. Two or more intermediate annealing operations are performed in the middle of the cold rolling process so that the final cold rolling rate becomes 10 to 95%. Furthermore, additional annealing with a batch heating furnace is performed after the final cold rolling, at a final sheet thickness in the temperature range of 300 to 450 °C, and at a temperature that prevents complete recrystallization. 23. Method for the production of aluminum alloy fin materials for brazing welding as claimed in claim 22, where the intermediate annealing, except for the final annealing, is performed using a heating furnace. 24. Aluminum alloy fin material for brazing, where the crystalline structure of the fin material, obtained by the manufacturing method described in claim 22, consists of fibrous material. 25. A method for producing aluminum alloy fin materials for brazing, comprising the steps of: ingot sheet formation by casting molten aluminum alloy by continuous rolling; and cold rolling of the ingot sheet to prepare the fin material, with an aluminum alloy containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, with the remainder being Al and unavoidable impurities, where the continuous rolling is carried out under the temperature conditions of... The molten liquid is at a temperature of 700 to 900 °C, the roller load is 5,000 to 15,000 N/s per sheet, the ingot width is 1 mm, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing processes are performed in the middle of the cold rolling process. This intermediate annealing includes a final intermediate annealing in a furnace heating temperature of 300 to 450 °C, at a temperature that prevents complete recrystallization. Therefore, the cold rolling rate after the final intermediate annealing is adjusted to 10 to 60%. 26. A method for producing aluminum alloy fin materials for brazing, comprising the steps of: ingot sheet formation by casting molten aluminum alloy by continuous rolling; and cold rolling of the ingot sheet to prepare the fin material, with an aluminum alloy containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, as well as at least one kind of Zn 3.0% by mass or less of, In 0.3% by mass or less, and Sn 0.3% by mass or less, with the remainder being Al and unavoidable impurities, where the continuous rolling is carried out under the temperature conditions of The molten liquid is at a temperature of 700 to 900 °C, the roller load is 5,000 to 15,000 N/s per sheet, the ingot sheet is 1 mm wide, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing processes are performed in the middle of the cold rolling process. This intermediate annealing includes a final intermediate annealing in a heating furnace at a temperature of 300 to 450 °C and at a temperature at which complete recrystallization is not allowed. Therefore, the cold rolling rate after the final intermediate annealing is adjusted to 10 to 60%. 27. Method for producing aluminum alloy fin materials for brazing, which includes the following steps: forming the ingot plate by casting molten aluminum alloy using continuous rolling; And cold rolling of igotte sheets for the preparation of fin materials, with an aluminum alloy containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, as well as at least one kind of Cu 0.3% by mass or less, Cr 0.15% by mass or less, Ti 0.15% by mass or less, Zr 0.15% by mass or less, and Mg 0.5% by mass or less, with the remainder being A1 and unavoidable impurities, where such continuous rolling is carried out under the temperature conditions of The molten liquid is at a temperature of 700 to 900 °C, the roller load is 5,000 to 15,000 N/s per sheet, the ingot width is 1 mm, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing processes are performed in the middle of the cold rolling process. This intermediate annealing includes a final intermediate annealing in a furnace heating temperature of 300 to 450 °C, at a temperature at which complete recrystallization is prohibited. Therefore, the cold rolling rate after the final intermediate annealing is adjusted to 10 to 60%. 28. A method for producing aluminum alloy fin materials for brazing, consisting of the following steps: forming the ingot sheet by casting molten aluminum alloy using a continuous rolling method; And cold rolling of igotte sheets for fin material preparation, with aluminum alloys containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, at least one type of Zn 3.0% by mass or less, In 0.3% by mass or less, and Sn 0.3% by mass or less, as well as at least one type of Cu 0.3% by mass or less, Cr 0.15% by mass or less, Ti 0.15% by mass or less, Zr 0.15% by mass or less, and Mg 0.15% by mass or less, with the remainder being Al and unavoidable impurities, The continuous rolling process is carried out under conditions of molten liquid temperature of 700 to 900 °C, roller load of 5,000 to 15,000 N/s per 1 mm wide ingot sheet, casting speed of 500 to 3,000 mm/min, and ingot sheet thickness of 2 to 9 mm. Two or more intermediate annealing processes are performed in the middle of the cold rolling process, including a final intermediate annealing in a heating furnace at temperatures of 300 to 450 °C, at a temperature that prevents complete recrystallization. Therefore, the cold rolling rate after the final intermediate annealing is adjusted to 10 to 60%. 29. A method for producing aluminum alloy fin material for brazing, comprising the steps of: ingot sheet formation by casting molten aluminum alloy by continuous rolling; and cold rolling of the ingot sheet to prepare the fin material, with an aluminum alloy containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2%, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, with the remainder being Al and unavoidable impurities, where the continuous rolling is carried out under the temperature conditions of The molten liquid is at a temperature of 700 to 900 °C, the roller load is 5,000 to 15,000 N/s per sheet, the ingot width is 1 mm, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing operations are performed in the middle of the cold rolling process, so that the final cold rolling rate becomes 10 to 95%, and additional annealing with a heating furnace is performed after the final cold rolling, at a final sheet thickness in the temperature range of 300 to 450 °C, and at a temperature at which complete recrystallization is prohibited. 30. A method for producing aluminum alloy fin material for brazing, comprising the steps of: forming the ingot sheet by casting the molten aluminum alloy by continuous rolling; and cold rolling the ingot sheet to prepare the fin material, with an aluminum alloy containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, as well as at least one kind of 3.0% by mass or less of Zn, 3.0% by mass or less of In, and 0.3% by mass or less of Sn, with the remainder being A1 and unavoidable impurities, where the said continuous rolling is carried out under the temperature conditions of The molten liquid is at a temperature of 700 to 900 °C, the roller load is 5,000 to 15,000 N/s per sheet, the ingot width is 1 mm, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing operations are performed in the middle of the cold rolling process, so that the final cold rolling rate becomes 10 to 95%, and additional annealing with a heating furnace is performed after the final cold rolling, at a final sheet thickness in the temperature range of 300 to 450 °C, and at a temperature that prevents complete recrystallization. 31. A method for producing aluminum alloy fin materials for brazing, consisting of the following steps: forming the fin plate by casting molten aluminum alloy using a continuous rolling method; And cold rolling of igotte sheets for the preparation of fin materials, with aluminum alloys containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, as well as at least one type of Cu 0.3% by mass or less, Cr 0.15% by mass or less, Ti 0.15% by mass or less, Zr 0.15% by mass or less, and Mg 0.5% by mass or less, with the remainder being A1 and unavoidable impurities, where such continuous rolling is carried out under the temperature conditions of The molten liquid is at a temperature of 700 to 900 °C, the roller load is 5,000 to 15,000 N/s per sheet, the ingot width is 1 mm, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing operations are performed in the middle of the cold rolling process, so that the final cold rolling rate becomes 10 to 95%, and additional annealing with a heating furnace is performed after the final cold rolling, at a final sheet thickness in the temperature range of 300 to 450 °C, and at a temperature that prevents complete recrystallization. 32. Method for the production of aluminum alloy fin materials for brazing, which includes the following steps: forming of the ingot plate by casting molten aluminum alloy by continuous rolling; And cold rolling of igotte sheets for the preparation of fin materials, with an aluminum alloy containing more than 0.6% by mass, and 1.8% by mass or less of Mn, more than 1.2% by mass, and 2.0% by mass or less of Fe, and more than 0.6% by mass, and 1.2% by mass or less of Si, at least one type of Zn 3.0% by mass or less, In 0.3% by mass or less, and Sn 0.3% by mass or less, as well as at least one type of Cu 0.3% by mass or less, Cr 0.15% by mass or less, Ti 0.15% by mass or less, Zr 0.15% by mass or less, and Mg 0.5% by mass or less, with the remainder being Al and unavoidable impurities, where such continuous rolling is carried out under the temperature conditions of The molten liquid is at a temperature of 700 to 900 °C, the roller load is 5,000 to 15,000 N/s per sheet, the ingot width is 1 mm, the casting speed is 500 to 3,000 mm/min, and the ingot sheet thickness is 2 to 9 mm. Two or more intermediate annealing processes are performed in the middle of the cold rolling process, so that the final cold rolling rate becomes 10 to 95%, and additional annealing with a heating furnace is performed after the final cold rolling, at a final sheet thickness in the temperature range of 300 to 450 °C, and at a temperature at which complete recrystallization is prohibited.