A high-efficiency preparation process of aluminum alloy sheet for automobile body

Abstract

The invention discloses an efficient preparation process of an aluminum alloy plate for an automobile body. The efficient preparation process comprises the following steps that (1) aluminum alloy casting is conducted; (2) homogenization heat treatment is conducted; (3) a blank is subjected to hot rolling and / or cold rolling to obtain a plate strip coiled material; and (4) the plate strip coiled material is subjected to continuous on-line treatment comprising working procedures such as pre-aging heating, oil smearing, coiling and temperature control cooling treatment. The strip material is heated with the heating rate V and subjected to continuous temperature rising to the temperature T1 in a pre-aging heating device, then the strip material is subjected to the working procedures of continuous oil smearing and coiling, after coiling, the temperature of the coiled material is T2, finally the coil material is subjected to temperature control cooling for the time t and cooled to 60 DEG C or below, and the treatment is finished. V heating is larger than or equal to 1 DEG C / s and smaller than or equal to 30 DEG C / s; T1 is larger than or equal to 90 DEG C and smaller than or equal to 150 DEG C; T2 is larger than or equal to 70 DEG C and smaller than or equal to 120 DEG C; T1 is larger than or equal to T2+15 DEG C; and T is larger than or equal to 60 min and smaller than or equal to 900 min. The prominent problem that the traditional pre-aging technology occupies long time for a continuous production line, and the production efficiency is low is better solved, and efficient and energy-saving production of the plate is realized.

Description

technical field [0001] The invention relates to the preparation process of the 6000 series (Al-Mg-Si series) aluminum alloy registered by the International Aluminum Association and the China Nonferrous Metals Standardization Technical Committee, and especially designs a high-efficiency preparation process of the 6000 series aluminum alloy plate for automobile body The invention belongs to the technical field of preparation and processing of aluminum alloy materials. Background technique [0002] For the automobile manufacturing industry, reducing automobile fuel consumption and saving energy is the eternal development theme of the global automobile industry. According to data, for every 100kg reduction in vehicle weight of traditional fuel vehicles, fuel consumption can be reduced by 0.3-0.6L / 100km, CO 2 Emissions can be reduced by 5g / km. As one of the effective ways of energy saving and emission reduction of automobiles, automobile lightweight has become the main trend of...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a high-efficiency preparation process for aluminum alloy sheets for automobile bodies, aiming at the technical bottleneck that restricts the industrialized continuous production of aluminum alloy sheets for automobile bodies, so as to ensure the excellent paint hardening response ability and formability of 6000 series aluminum alloys Under the premise of taking both into account, solve the outstanding problems of long time occupation and low production efficiency of the traditional pre-aging technology on the continuous production line, and realize high-efficiency and energy-saving production of plates

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