Production process and application of T4P state aluminum alloy narrow coiled plate

Abstract

The invention relates to a production process of a T4P state aluminum alloy narrow roll plate. The production process comprises the steps of aluminum alloy rapid cooling continuous casting, continuous expansion extrusion, online water quenching treatment, coiling and pre-aging treatment. The cooling speed of rapid cooling continuous casting is 200-350 DEG C/s, and an aluminum alloy rod blank with the equivalent diameter of 20-40 mm is obtained through casting; the aluminum alloy blank rod is continuously expanded and extruded into a narrow coiled plate with the thickness being 4-30 mm and the width being 80-300 mm through an expansion die cavity, and the temperature of an outlet of the expansion die cavity is controlled to be 400-540 DEG C; cooling water used for carrying out online water quenching treatment on the narrow coiled plate is arranged at the position 10-50 mm away from an outlet of the expansion die cavity, and coiling and pre-aging treatment are carried out. According to the method, the aluminum alloy is subjected to rapid cooling continuous casting, then continuous expansion extrusion and online water quenching at an outlet, so that a T4P state product with a good solid solution effect can be obtained, and the whole roll of plate is uniform and consistent in structure and performance; compared with a large ingot casting-hot rolling process product, the narrow roll plate is directly formed through continuous expansion extrusion, slitting/trimming treatment is not needed any more, and the yield is effectively increased.

Description

technical field [0001] The invention relates to the technical field of metal plastic processing, in particular to a production process and application of a T4P state aluminum alloy narrow roll plate. Background technique [0002] With the rapid development of advanced manufacturing industry, aluminum-based metal layered composites provide a reasonable material selection and cost reduction because of their low density, good electrical conductivity, thermal conductivity, corrosion resistance and mechanical properties. People pay more and more attention to better conditions, especially in the fields of aviation, aerospace, national defense, transportation, electronics and communication. Aluminum-based metal layered composite materials are usually prepared from aluminum alloy narrow coils by rolling composite method. [0003] The rolling composite method is a process in which two or more layers of metals or alloys are stacked by rolling with a large reduction, relying on the me...

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Problems solved by technology

However, this process also has many disadvantages, namely: complex process, strict control of rolling speed and initial rolling temperature, and high difficulty in operation

[0007] In addition to the above problems, the aluminum alloy narrow coil plate products produced by the above semi-continuous ingot-rolling method are in a hot-processed state. Figure 4 As shown, the T4P treatment of solution heating and quenching must also be carried out. Its process operation is quite difficult for aluminum alloy narrow coils with large coil weight, and the layered composite material is also prone to cracking in the subsequent solution quenching process. , deformation and uneven performance and other product quality problems

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