TH47425B - Aluminum alloy sheet and method for the production of aluminum alloy sheet - Google Patents

Abstract

DC60 (25/02/54) Aluminum alloy sheets are produced by preparing flat bars 5 to 15 mm thick by continuous casting machines by continuous casting process by Use alloy Melts containing Mg 0.40% to 0.65%, Si 0.50% to 0.75%, Cr 0.05% to 0.20%, to Fe 0.10% to 0.40%, the remainder is Al, those components are required. To roll the flat bar into a curl Hot rolling or direct coiling of flat bars Cold rolling of the resulting flat bar The sheet that was passed Heat treatment with a continuous sticky oven And then making the resulting sheet Get that in advance Aluminum alloy discs contain the same mixtures as those of alloys that Molten and will have a grain size of 10 to 25 ° C, although the aluminum alloy plate has Excellent annealing ability, bendability and surface quality (peeling orange), that is, the aluminum alloy plate is of high quality. Sheets can be obtained Produced at low cost Aluminum alloy sheets are produced by preparing slabs with a thickness of 5 to 15 mm with continuous casting machines through a continuous casting process using alloys. Melts containing Mg 0.40% to 0.65%, Si 0.50% to 0.75%, Cr 0.05% to 0.20%, to Fe 0.10% to 0.40%, the remainder is Al, those components are required. Slab coil winding, hot rolling or direct slab coil winding Cold rolling of the resulting slabs is the conductivity of the resulting sheet through the heat treatment of the solution with a continuous sticky oven. And then is Make the resulting sheet at in advance Aluminum alloy discs contain the same mixtures as those of aluminum alloy discs. The alloy is molten and has a grain size of 10 to 25 ° C. Although the alloy plate of Aluminum has excellent annealing ability, cut ability and excellent surface quality (peeling off orange), that is, aluminum alloy discs are of high quality. Get production at low cost.

Claims (9)

1. Aluminum alloy sheet will contain Mg 0.40% to 0.65%, Si 0.50% to 0.75%, Cr 0.05% to 0.20%, and Fe 0.10% to 0.40%, the rest being A1. Those components are essential elements. The alloy sheet will have a grain size of 10 to 25 microns. 2. The aluminum alloy sheet of claim 1, wherein it also contains 0.15% or less Cu. 3. An aluminum alloy sheet according to any one of claims 1 or 2, which also contains 0.10% or less Ti. 4. A method for producing aluminum alloy sheets comprising the steps of preparing slabs 5 to 15 mm thick by continuous casting machinery, by the continuous casting process using a molten alloy containing 0.40% to 0.65% Mg, 0.50% to 0.75% Si, 0.05% to 0.20% Cr, and 0.10% to 0.40% Fe, with the remainder being Al, those components being the elements to be formed; winding the slab into coils; cold rolling the slab into sheets; subjecting the sheets to a solution heat treatment such that the sheets are heated to a temperature of 530°C to 560°C at a heating rate of 10°C/s or more and then maintained at that temperature for five seconds or more; quenching the sheets with water; coiling the sheets. The obtained plates were maintained at a temperature of 60°C to 110°C for three to 12 hours and then the plates were cooled to room temperature. 5. A method for producing aluminum alloy sheets comprising the steps of preparing slabs 5 to 15 mm thick by continuous casting machinery by a continuous casting process using a molten alloy containing 0.40% to 0.65% Mg, 0.50% to 0.75% Si, 0.05% to 0.20% Cr, and 0.10% to 0.40% Fe, the remainder being A1, of which those components are essential elements; winding the slab into coils; cold rolling the resulting slab into sheets; subjecting the resulting sheet to a solution heat treatment such that the sheet is heated to a temperature of 530°C to 560°C at a heating rate of 10°C/s or more and then maintained at that temperature for five seconds or more; cooling the resulting sheet to a temperature of 70°C to 115°C; coiling the resulting sheet and then The obtained plate is cooled to room temperature at a cooling rate of 10°C/hour or less. 6. A method for producing aluminum alloy sheets comprising the steps of preparing slabs 10 to 30 mm thick by continuous casting machinery by a continuous casting process using a molten alloy containing 0.40% to 0.65% Mg, 0.50% to 0.75% Si, 0.05% to 0.20% Cr, and 0.10% to 0.40% Fe, the remainder being A1, those components being essential elements; hot-rolling the slabs into hot-rolled sheets 2 to 8 mm thick; winding the hot-rolled sheets into coils; cold-rolling the hot-rolled sheets into cold-rolled sheets; treating the cold-rolled sheets in a hot melt such that the sheets are heated to a temperature of 530°C to 560°C at a heating rate of 10°C/s or more and then maintained at that temperature for five seconds or more; hardening the sheets with water. Coiling of the obtained sheets, maintaining the obtained sheets at a temperature of 60 to 110 degrees Celsius for three to 12 hours and then cooling the obtained sheets to room temperature. 7. A method for producing aluminum alloy sheets comprising the steps of preparing slabs 10 to 30 mm thick by continuous casting machinery by a continuous casting process using a molten alloy containing 0.40% to 0.65% Mg, 0.50% to 0.75% Si, 0.05% to 0.20% Cr, and 0.10% to 0.40% Fe, the remainder being Al, those components being essential elements, hot rolling the slabs into hot rolled sheets 2 to 8 mm thick, winding the hot rolled sheets into coils, cold rolling the hot rolled sheets, the resulting hot rolling into cold rolled sheets, and subjecting the cold rolled sheets to The solution is heated in such a way that the plate is heated to a temperature of 530°C to 560°C at a heating rate of 10°C/second or more and then maintained at that temperature for five seconds or more, the plate is cooled to a temperature of 70°C to 115°C, the plate is coiled, and then the plate is cooled to room temperature at a cooling rate of 10°C/hour or less. 8. A method for producing aluminum alloy sheets according to any one of claims 4 to 7, wherein the molten alloy also contains 0.15% or less Cu. 9. A method for producing aluminum alloy sheet according to any one of claims 4 to 8, wherein the molten alloy also contains 0.10% or less Ti. 1. A method for producing aluminum alloy sheet according to any one of claims 4 to 9, wherein the cold rolling step is performed with a reduction ratio of 20% or more per pass.