Mechanical Basics-Metal Heat Treatment

Metal heat treatment is one of the important processes in mechanical manufacturing. Compared with other machining processes, heat treatment generally does not change the shape and overall chemical composition of the workpiece, but rather gives or improves the workpiece's usability by changing the internal microstructure of the workpiece or changing the chemical composition of the workpiece's surface. It is characterized by improving the intrinsic quality of the workpiece, which is generally not visible to the naked eye. Therefore, it is a special process in mechanical manufacturing and an important part of quality management.
In order to make the metal workpiece with the required mechanical properties, physical properties and chemical properties, in addition to a reasonable choice of materials and a variety of molding process, heat treatment process is often essential. Steel is the most widely used materials in the mechanical industry, steel microstructure complex, can be controlled by heat treatment, so the heat treatment of steel is the main content of metal heat treatment. In addition, aluminum, copper, magnesium, titanium and its alloys can also be heat treatment to change its mechanical, physical and chemical properties, in order to obtain different performance.
Integral heat treatment is a metal heat treatment process in which the workpiece is heated as a whole and then cooled at an appropriate rate to change its overall mechanical properties. The overall heat treatment of steel roughly annealing, normalizing, quenching and tempering four basic processes.
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