What is the important link of heat treatment of aluminum alloy forging?

Aluminum alloy forging heat treatment process generally consists of three parts: heating, heat preservation and cooling, sometimes only heating and cooling process. These processes are connected with each other and cannot be discontinued. It is important to heat each part of the aluminum alloy forging, and it is important to heat this part. There are many heating methods of metal heat treatment, the first is to use charcoal and coal as heat source, and then apply liquid and gas fuel. Electrical applications make heating easy to control and free from environmental pollution. These heat sources can be heated directly, or indirectly heated by molten salts or metals, or floating particles. During heat treatment of aluminum alloy, the workpiece is exposed to the air, which is often oxidized and decarburized, which has a very negative effect on the surface performance of the parts after heat treatment. Therefore, the metal should be heated in a controlled atmosphere or in a protective atmosphere, in molten salt and in a vacuum, or by coating or wrapping. Aluminum alloy forgings heating temperature is one of the important process parameters of heat treatment process, selection and control of heating temperature, is a major problem to ensure the quality of aluminium alloy forging heat treatment, the heating temperature is processed metal material and heat treatment, the different aims of the aluminium alloy forgings are heated to a temperature of phase transformation temperature of above commonly, in order to obtain high temperature, and it takes time to shift, speed to the aluminum alloy forging said so when aluminum alloy forgings meet the requirements of heating temperature on the surface, still need to maintain a certain amount of time in some temperature, the aluminum alloy forgings, both inside and outside temperature, microstructure transformation completely, make aluminum alloy forgings This period is called thermal insulation time. When heated by high energy density and surface heat treatment, the heating speed is extremely fast, and there is usually no heat preservation time, while the heat preservation time of chemical heat treatment is usually longer.

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