Method for manufacturing aluminum alloy automobile plates through subcooled rolling

Abstract

The invention discloses a method for manufacturing an aluminum alloy automobile plate through subcooled rolling. The method comprises the steps that a hot-rolled plate made from 5-series aluminum alloy or 6-series aluminum alloy is selected as a raw material for subcooled rolling; the aluminum alloy plate which is hot-rolled and then cooled to the room temperature is put into a liquid nitrogen refrigerating high-low temperature test chamber to be cooled, wherein the set temperature target is minus 60-minus 40 DEG C, and the heat-preservation time is 15-25 min; and the aluminum alloy plate subjected to low-temperature treatment is subjected to multiple passes of subcooled rolling on a cold rolling mill with the reduction rate for each pass being 10% or over, the aluminum alloy plate is cooled continuously after each pass is completed to enable the temperature to be below -40 DEG C, and cold rolling is conducted repeatedly until the plate is of the target thickness. According to the method for manufacturing the aluminum alloy automobile plate through subcooled rolling, the recrystallized structure of the aluminum alloy plate is uniform, recrystallized grains are small in size, high in strength and good in stamping property, requirements for the strength and the stamping property of the automobile plate are met accordingly, and the automobile lightening progress is accelerated.

Description

[0001] The technical field [0002] The invention relates to a method for producing an aluminum alloy automobile plate by supercooling rolling. Background technique [0003] With the increasing shortage of energy issues and the deterioration of environmental issues, "energy saving, emission reduction, green environmental protection" has become the theme of the current era, which is in line with the national sustainable development strategy. In the automobile industry, automobile lightweight has been proposed. We can realize the lightweight of automobiles by replacing traditional steel materials with lightweight metal materials or optimizing the mechanism of automobiles. The focus of current research is to find lightweight alloys that can meet performance requirements instead of steel materials. Most cars start to use aluminum alloy materials instead of steel materials to reduce the weight of the car body, so that the fuel consumption of the cars will be greatly reduced, and ...

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Problems solved by technology

[0004] At present, cold rolling technology has been applied to steel materials, but there is no research in the field of aluminum alloy automotive sheets, which is a blank area