Thermal treatment method for aluminum plate net of front panel of acoustic board

Abstract

The invention relates to a thermal treatment method for an aluminum plate net. Specific to the performance demand of the aluminum plate net of a front panel of an aluminum fiber acoustic board, the invention provides a thermal treatment method for the aluminum plate net of the front panel. The aluminum plate net is treated according to the thermal treatment method, namely, the greasy dirt on the surface of the material is removed, the strength of the material is reduced, the coefficient of elongation of the material is increased and the aluminum plate net is softened, so that the plastic deformation of the aluminum plate net during a rolling process is met, the aluminum plate net is plastically combined with other materials, the demand on certain strength is ensured, and the aluminum plate net is prevented from being damaged and broken during the rolling process caused by the decreasing of the plasticity. According to the technical scheme, a thermal treatment method for the aluminum plate net of the acoustic board is characterized by comprising five stages: increasing temperature for the first time, keeping intermediate temperature, increasing temperature for the second time, keeping high temperature and cooling.

Description

Technical field [0001] The invention relates to a method for heat treatment of metal materials, in particular to a method for heat treatment of aluminum mesh. Background technique [0002] With the advancement of urbanization and the improvement of residents' awareness of environmental protection, the problem of urban noise has become more prominent, and residents' attention to the impact of noise is also increasing. In urban central areas, as the surrounding population density increases, some urban substations are required to meet higher requirements for surrounding noise emissions. For example, areas that only need to reach Class 2 and Class 3 acoustic environment function zones in the past are developed into 1. Class, Class 2 or even Class 0 acoustic environment functional area. [0003] Noise in the field of power transmission and transformation, especially the noise from substations, is the most prominent. Noise is mainly generated by transformers, reactors, filters and fan c...

AI Technical Summary

Problems solved by technology

[0018] Through heat treatment, the purpose of removing rolling oil, eliminating part of the stress, and softening the aluminum expanded metal can be achieved. It is known from the theory that after plastic deformation, the recrystallization starting temperature of aluminum is 260-300°C, and the heat treatment temperature is above 300°C. The occurrence rate of nucleation increases, and the swallowing and continuous growth of grains occur. If the heat treatment temperature is set in this range, the strength and hardness of the material will decrease after heat treatment, and the plasticity will not change significantly, but it will rise slowly; The tendency of particle swallowing and growth is obvious. If heat treatment is carried out at this temperature, the strength and hardness of the material will decrease after heat treatment, and the plasticity will decrease to a certain extent. As the heat treatment temperature rises, the strength and elongation of aluminum expanded mesh will change accordingly. The upper limit temperature of heat treatment decreases, and the plasticity decreases with the increase of the upper limit temperature of heat treatment. However, there is no exact and recognized theoretical support for a reasonable heat treatment temperature.