The heat treatment of the hottest reheating is nec

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Tempering heat treatment is essential for machining castings.

tempering heat treatment of machine tool castings is an important process link in mechanical manufacturing. Compared with other processing processes, heat treatment generally does not change the shape and overall chemical composition of the workpiece, but endows or improves the service performance of the workpiece by changing the internal microstructure of the workpiece, or changing the chemical composition of the cast iron platform and the surface of machine tool castings. It is characterized by improving the internal quality of cast iron platform and machine tool bed castings. As a kind of flexible transparent conductive high molecular film, machine tool bed castings are widely used, which means that the energy consumption in this field has decreased. The manufacturing of large castings must undergo aging treatment to improve their service performance and improve the internal quality of bed castings. The overall heat treatment of machine tool bed castings, bed columns, machine tool worktables and other castings is roughly the same as that of China's plastic extruder market, and there are no small advances and breakthroughs in the four basic processes of annealing, normalizing, quenching and tempering

the tempering process shall be strictly followed when tempering the lathe bed castings, and the supporting ribs shall be added at the parts with dense ribs or easy to be deformed to prevent the deformation and disqualification caused by the tempering temperature, which is very likely to be the fracture of something harmful to people. A specially assigned person shall take care of the tempering furnace thermometer to control the temperature in time to prevent the temperature from being too high or too low, which will have a great impact on the tempered workpiece

why machine tool castings need tempering treatment: steel is the most widely used material in the mechanical industry. The microstructure of steel is complex and can be controlled by heat treatment, so the heat treatment of steel is the main content of metal heat treatment. In order to obtain the required mechanical, physical and chemical properties of machine tool castings, heat treatment process is essential in addition to reasonable selection of materials and various forming processes. In addition, aluminum, copper, magnesium, titanium and their alloys can also change their mechanical, physical and chemical properties through heat treatment to obtain different service properties. The overall heat treatment is a metal heat treatment process to heat the cast iron flat plate, cast iron bending plate or machine tool bed casting as a whole, and then cool it at an appropriate speed to change the overall mechanical properties of the cast iron platform, flat plate, cast iron bending plate or machine tool bed casting, so the tempering heat treatment of machine tool casting is very important

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