gravity casting machine production is completed, according to the characteristics of aluminum castings have will to corresponding processing of casting, heat treatment is a process of the more important.
Heat treatment does not change the shape of the workpiece and the chemical composition of the whole, but by changing the workpiece internal microstructure, or change the surface chemical composition, or improve the use performance of workpiece.
The main characteristic of the heat treatment is to improve the immanent quality of workpiece, annealing heat treatment is usually used to stress, the stress relieving is to casting in a certain temperature heat preservation, and then slowly cooling, to eliminate the casting residual stress in casting.
The stress relieving can avoid the casting in the process of storage, transportation and use by vibration or environment changes, cracking causes deformation or even themselves.
In order to make the production of aluminum gravity casting machine parts have a certain mechanical properties, physical properties and chemical properties, in addition to select appropriate materials and various forming process, heat treatment process is necessary.
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