Preheat treatment for improving automobile plate of 6111 aluminium alloy formation and baking paint hardening performance

A baking paint hardening and preheating treatment technology, which is applied in the field of alloy heat treatment to achieve the effect of low temperature, short time and improved strength

Inactive Publication Date: 2008-09-17
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the heat treatment process of the existing 6111 aluminum alloy automobile sheet, the present invention provides a preheat treatment process capable of realizing industrialized production and improving the formability and paint hardening of the 6111 aluminum alloy automobile sheet

Method used

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  • Preheat treatment for improving automobile plate of 6111 aluminium alloy formation and baking paint hardening performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The 6111 alloy ingot is homogenized at 470℃×5h+525℃×18h in a circulating air furnace, then it is cut and milled, hot-rolled and finally cold-rolled into a 1.2mm thick sheet. The thin plate is subjected to 540℃×30min solution treatment water quenching in a salt bath furnace, and after being left at room temperature for 3 days, it is heat treated in a drying oven at 185℃×12min, and then it is stretched and cupped after being left at room temperature for 2 weeks. In the test, the heat treatment of the simulated baking varnish at 170℃×30min was carried out in a drying oven.

Embodiment 2

[0013] The 6111 alloy ingot is homogenized at 470℃×5h+525℃×18h in a circulating air furnace, then it is cut and milled, hot-rolled and finally cold-rolled into a 1.2mm thick sheet. The thin plate is subjected to 540℃×30min solution treatment water quenching in a salt bath furnace, and after being left at room temperature for 6 hours, it is heat treated in a drying oven at 200℃×13min, and then it is stretched and cupped after being left at room temperature for 2 weeks. The sudden test, simulating 170℃×30min baking varnish heating treatment is carried out in the drying box.

Embodiment 3

[0015] The 6111 alloy ingot is homogenized at 470℃×5h+525℃×18h in a circulating air furnace, then it is cut and milled, hot-rolled and finally cold-rolled into a 1.2mm thick sheet. The thin plate is subjected to 540℃×30min solution treatment water quenching in a salt bath furnace, and after being left at room temperature for 5 days, it is heat treated in a drying oven at 180℃×15min, and then it is stretched and cupped after being left at room temperature for 2 weeks. In the test, the heat treatment of the simulated baking varnish at 170℃×30min was carried out in a drying oven.

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Abstract

The invention is about the pretreatment of the formability of the 6111 A-alloy autocar board and the sclerosing of the stoving varnish. The process is to treat the 6111 board by the solution hardening, stable it for 2h-5d in the room temperature, then to preheating treatment for 7min-15min in 180 DEG C-200 DEG C. The formability of the 6111 A-alloy autocar board and the sclerosing of the stoving varnish are all improved qpparently, it is used to improve the presswork ratio. So the car factory can use the A-alloy board to produce the car body instead of the steel plate.

Description

Technical field [0001] The invention relates to the technical field of alloy heat treatment, in particular to a pre-heat treatment process for improving the formability and paint hardenability of 61 11 aluminum alloy automobile plates. Background technique [0002] The requirements of energy saving, environmental protection, safety and reliability make it imperative to reduce the weight of automobiles. Aluminum alloy material has become an ideal material for automobile lightweight due to its high specific strength, good formability, and easy recovery of corrosion resistance. Since car bodies account for at least 30% of the total weight of cars, the aluminization of car bodies has attracted much attention from car manufacturers in various countries in recent years. The heat-treatable 6000 series aluminum alloy in solution quenched state has good forming properties. With the help of the coating and baking process of car outer body stamping parts, it can further exert its age harden...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/04
Inventor 田妮赵刚刘春明左良宋文举刘宏
Owner NORTHEASTERN UNIV LIAONING
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