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

A technology of paint hardening and preheating treatment, applied in the field of alloy heat treatment, to achieve the effects of improving strength, reducing stamping costs, and simple and convenient control

Inactive Publication Date: 2006-08-16
NORTHEASTERN UNIV
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] After the 6111 alloy ingot is homogenized in a circulating air furnace at 470°C×5h+525°C×18h, it is cut and milled, hot-rolled and finally cold-rolled into a thin plate with a thickness of 1.2mm. After the sheet is quenched in a salt bath furnace for solution treatment at 540°C×30min, it is parked at room temperature for 1 day, then heat-treated at 180°C×10min in a drying oven, and stretched and cupped after 2 weeks at room temperature The test, simulating 170℃×30min paint heating treatment is carried out in a drying oven.

Embodiment 2

[0013] After the 6111 alloy ingot is homogenized in a circulating air furnace at 470°C×5h+525°C×18h, it is cut and milled, hot-rolled and finally cold-rolled into a thin plate with a thickness of 1.2mm. After the thin plate is quenched in a salt bath furnace for solution treatment at 540°C×30min, it is parked at room temperature for 2 hours, then heat-treated at 180°C×6min in a drying oven, and stretched and cupped after 2 weeks at room temperature. Burst test, simulating 170 ℃ × 30min baking paint heat treatment is carried out in a drying oven.

Embodiment 3

[0015] After the 6111 alloy ingot is homogenized in a circulating air furnace at 470°C×5h+525°C×18h, it is cut and milled, hot-rolled and finally cold-rolled into a thin plate with a thickness of 1.2mm. After the thin plate is quenched in a salt bath furnace for solution treatment at 540°C×30min, after 5 days at room temperature, it is heat treated at 195°C×8min in an oven, and then stretched and cupped after 2 weeks at room temperature The test, simulating 170℃×30min paint heating treatment is 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 preheat treatment process for improving the formability and paint hardening properties of 6111 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 materials have become ideal materials for automobile lightweight due to their high specific strength, good formability, corrosion resistance and easy recycling. Since the car body accounts for at least 30% of the total weight of the car, the aluminization of the car body has attracted the attention of car manufacturers in various countries in recent years. The 6000 series aluminum alloy that can be strengthened by heat treatment has good formability in the solution quenched state, and its age hardening potential can be further developed by the coating and ...

Claims

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Application Information

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IPC IPC(8): C22F1/04
Inventor 田妮赵刚刘春明左良宋文举刘宏
Owner NORTHEASTERN UNIV
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