Heat treatment technology of the hottest aviation

Aviation aluminum alloy heat treatment technology

with the development of transportation technology, aluminum alloy is widely used in aviation materials because of its light weight, high strength and convenient processing. The effective application of aluminum alloy reduces the structural weight of aircraft, improves flight performance and increases economic benefits. Therefore, aviation aluminum alloy technology has also received more attention, In this issue, we will take you to understand the aviation aluminum alloy heat treatment technology:

aluminum alloy heat treatment uses air circulation electric furnace instead of nitrate furnace

the traditional heat treatment uses nitrate furnace heating, which has the disadvantages of serious environmental pollution, energy consumption and waste, while the air circulation electric furnace has the advantages of fast start-up, good energy-saving effect, fast quenching transfer time and adjustable, meeting the requirements of different aluminum alloy parts. Solid solution quenching after heating in air circulation electric furnace has no pollution to the cooling medium, which is conducive to the promotion and use of organic quenching medium, reducing heat treatment distortion and improving production efficiency

the key technology of air circulation electric furnace is how to ensure the uniformity of furnace temperature (± 3 - ± 5 ℃), especially the requirements of large-scale furnace, and how to meet the uniformity requirements of furnace temperature at lower temperature (100-150 ℃). The second key technology is how to ensure rapid quenching transfer time, which can be adjusted and controlled according to different requirements of parts

organic quenching medium

aluminum alloy quenching medium is usually water or hot water, but for the case of large heat treatment deformation or strict deformation techniques, hot water can not meet the requirements, often produce unacceptable odor and smoke, so we must choose organic quenching medium water solution. Using organic quenching medium water solution instead of water in air circulation electric furnace can reduce aluminum alloy heat treatment deformation and sheet metal correction time by more than 50%

conductivity test

since aluminum alloy materials were used in aircraft manufacturing, tensile test or hardness test has been used to test the heat treatment quality of aluminum alloy. After heat treatment of aluminum alloy, there may be two different states under one strength (hardness) value. On the contrary, there may be two different strength (hardness) values under one state where the key is the cheap labor cost. Therefore, it is a kind of backward testing method to control the quality of aluminum alloy after heat treatment only by hardness or strength. Cellasto is a kind of microporous polyurethane elastomer, which can not completely ensure the quality

conductivity detection has the unique advantages of convenience, high efficiency, basically not limited by the shape, weight and other conditions of the tested parts, and no damage to the parts. Since the 1980s, conductivity measurement has gradually been widely used in aluminum alloy 13 in China Air supply pressure: 7Mpa. (provided by the user of the gas source) the heat treatment status inspection of gold materials/parts is in progress. In GB/t12966-1991 "eddy current test method for electrical conductivity of aluminum alloys", the test method is given, and gjb2894-l997 "requirements for electrical conductivity and hardness of aluminum alloys" defines the requirements for electrical conductivity and hardness value