A kind of hot rolling process of hard aluminum alloy for anodic oxidation

Abstract

The invention discloses a hot rolling process of a hard aluminum alloy for anodic oxidation. The hot rolling process comprises the following steps that (1) a hard aluminum alloy plate ingot is subjected to homogenized heat preservation at the temperature of 490 DEG C for 8 hours; (2) after homogenizing is conducted, rolling is started at the temperature of 440-460 DEG C according to the equal rolling reduction allocation principle; (3) hot rolling is conducted till the temperature of the plate ingot is 370-390 DEG C, one time of low reduction rolling with the rolling reduction ratio being 7% is conducted at first, and then, one time of ultra-high reduction rolling with the rolling reduction ratio being 45% is conducted; and (4) after the plate ingot is treated through the step (3), rolling continues to be carried out according to the equal rolling reduction allocation principle, and the final rolling temperature is controlled to be 250-270 DEG C. By means of the hot rolling process, the forming capacity of a product machined by a common single-rack hot rolling mill can completely achieve the effect of a product machined by a multi-rack hot continuous rolling mill. According to the hot rolling process, practicality is high, the production and control difficulty and the cost are low, the product market competitiveness is obvious, and economic benefits are remarkable.

Description

technical field [0001] The invention belongs to the field of aluminum alloy processing, and in particular relates to a hot rolling process of hard aluminum alloy for anodic oxidation. Background technique [0002] 1090 aluminum alloy for anodic oxidation is currently the highest grade aluminum alloy product widely used in the field of lighting decoration with industrial pure aluminum (aluminum purity ≥ 99.90%, generally not exceeding 99.93%) as the base material in the world. , which are divided into soft (including semi-soft) products for anodic oxidation and hard products for anodic oxidation, among which 1090 soft (including semi-soft) products for anodic oxidation, and 1090 reflectors for bright light reflectors (also domestic Referred to as reflector), the product is characterized by high brightness and high forming ability, and is widely used in indoor and outdoor and traffic lighting fields; while 1090 hard products for anodizing are represented by 1090 mirror panels ...

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Problems solved by technology

At present, domestic aluminum alloy products in the field of traffic lighting decoration are concentrated in the low-end 1070, 1050, 1060 and other grades of aluminum alloys, and the reflectivity is 60-70%. The processing methods of this type of products, except for DC (hot rolling ) processing methods, there is even CC (casting-rolling-rolling) rolling method of production, the absence of this core technology and the disorderly competition in the domestic market not only lead to an increase in investment risks for domestic enterprises to develop 1090 high-end anodic oxidation materials At the same time, it also caused the development of high-end anodized products in my country to stagnate.

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