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Measures to prevent aluminum alloy forging oxidation and reduce decarburization


When heating in the aluminum alloy forging process, the phenomenon that the iron and alloy of the surface layer of the material steel react with the elements such as oxygen, carbon dioxide, water vapor, etc. in the medium to form an oxide film is called oxidation. The dimensional accuracy and surface brightness of the high-temperature workpiece are deteriorated after oxidation, and the steel piece having poor hardenability of the oxide film is prone to quenching soft spots.
In order to prevent aluminum alloy forging oxidation and reduce decarburization measures are:
1. Use Yan Yanran to burn the furnace.
2. The surface coating of the workpiece is sealed and sealed with stainless steel foil.
3. Heating in a protective atmosphere.
4. Heating in a salt bath furnace.

When the raw material is heated during the forging process of the aluminum alloy, the surface carbon reacts with oxygen, hydrogen, carbon dioxide and water vapor in the medium, and the surface carbon concentration is reduced. The surface hardness and fatigue strength of the decarburized steel after quenching are determined. And the wear resistance is lowered, and the residual tensile stress is formed on the surface to easily form a surface network crack.



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