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Aluminum alloy for automobile body of automobile and plate manufacturing method thereof

A technology of aluminum alloy sheet and automobile body, applied in the field of aluminum alloy

Inactive Publication Date: 2012-07-18
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the formability of aluminum alloy sheets for automobile bodies, the present invention provides an aluminum alloy for automobile bodies and a method for manufacturing the sheets thereof

Method used

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  • Aluminum alloy for automobile body of automobile and plate manufacturing method thereof
  • Aluminum alloy for automobile body of automobile and plate manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Cut a 100mm long ingot from the alloy 1# flat ingot for implementing the invention, put it into a circulating air furnace at room temperature, heat it up to 100°C for 21 hours with the furnace, then heat it up to 550°C for 24 hours, take it out of the furnace and air cool it, cut the head and mill it After surface reheating to 440°C to start rolling, first rolling 3 passes along the width direction of the slab, and then rolling along the length direction of the slab to form a 6mm thick plate, the final rolling temperature is 330°C. After cutting the hot-rolled plate to length, it is directly annealed at 440°C×0.5h, and finally cold-rolled into a thin plate with a thickness of 1.0mm. The thin plate was solution treated in a salt bath furnace for 540 ° C × 10 min and then water quenched, then placed in a drying oven for a pre-aging treatment of 170 ° C × 5 min within 1 min, and then parked at room temperature for 2 weeks before tensile and cupping tests.

Embodiment 2

[0018]Cut a 100mm long ingot from the alloy 1# flat ingot for implementing the invention, put it into a circulating air furnace at room temperature, heat it up to 450°C for 6h with the furnace, then heat it up to 550°C for 24h, take it out of the furnace, air cool, cut the head and mill Reheat to 440°C after surface rolling, first roll along the width direction of the slab for 3 passes, and then roll along the length direction of the slab to form a 5mm thick plate, the final rolling temperature is 325°C. After cutting to length, it is directly annealed at 420°C for 1h, and finally cold-rolled into a thin plate with a thickness of 0.9mm. The sheet was solution treated in a salt-bath furnace for 550°C×7min, then quenched at room temperature for 8h, then placed in a drying oven for pre-aging treatment at 190°C×7min, and then stretched and stretched after 2 weeks at room temperature. Cupping test.

Embodiment 3

[0020] Cut a 100mm long ingot from the alloy 1# flat ingot for implementing the invention, put it into a circulating air furnace at room temperature, heat it up to 280°C for 16 hours with the furnace, then heat it up to 550°C for 24 hours, take it out of the furnace and air cool it, cut the head and mill it After surface reheating to 450°C to start rolling, firstly rolling 3 passes along the width direction of the slab, and then rolling along the length direction of the slab to form a 4mm thick plate, the final rolling temperature is 310°C. After cutting the hot-rolled plate to length, it is directly annealed at 410°C×2h, and finally cold-rolled into a thin plate with a thickness of 0.7mm. The sheet is subjected to solution treatment water quenching at 545°C×7min in a salt bath furnace and parked at room temperature for 48h, then put into a drying oven for pre-aging treatment at 240°C×3min, and then stretched at room temperature for 2 weeks and cupping test.

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Abstract

The invention relates to an aluminum alloy for an automobile body of an automobile and a plate manufacturing method thereof and belongs to the technical field of aluminum alloy. The alloy comprises the following components in percentage by weight: 0.6 to 1.33 percent of Mg, 0.6 to 1.33 percent of Si, 0.3 to 0.7 percent of Cu, less than or equal to 0.3 percent of Zn, less than or equal to 0.15 percent of Fe, 0.2 to 0.8 percent of Mn, 0.01 to 0.3 percent of Cr, 0.01 to 0.3 percent of Ti and the balance of Al, wherein the mass fraction ratio of Mg to Si is 1; the total content of the mass fractions of Mn, Cr and Ti alloy elements is more than or equal to 0.3 percent; and Cu content is more than or equal to 0.3 percent. The method for manufacturing the aluminum alloy for the automobile body of the automobile comprises the following steps of: (1) smelting the alloy; (2) shaping the alloy by casting; (3) performing pre-nucleation treatment; (4) performing homogenization treatment; (5) performing hot rolling; (6) performing intermediate annealing; (7) performing cold rolling; (8) performing solid solution water quenching treatment; (9) standing a product at room temperature; and (10) performing pre-ageing and standing the product at the room temperature for more than two weeks. The aluminum alloy and the method are characterized in that: an alloy casting process and a plate production process of the invention are simple and convenient to control; an alloy plate of the invention has high intensity and excellent stamping forming property; and the stamping yield of a covering part for the aluminum alloy automobile body can be effectively enhanced and stamping cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an aluminum alloy composition for an automobile body with excellent formability and a method for manufacturing the plate. Background technique [0002] It is one of the most direct and effective ways to solve the two serious social problems of environmental pollution and energy shortage brought about by the rapid development of the automobile industry by using heat-treatable 6xxx series aluminum alloy sheets to manufacture automobile bodies to reduce the weight of automobiles. In recent years, developed countries such as Europe, America and Japan have successively registered 6016, 6111, 6181 and 6022 aluminum alloy grades for body panels in the world through research on the alloying principles and stamping methods of 6xxx series aluminum alloys, and declared a number of body panels. Patents for the preparation and processing of aluminum alloy sheets and the st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C21/08
Inventor 田妮赵刚王建军刘春明左良
Owner NORTHEASTERN UNIV LIAONING
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