Hurry up and bookmark! The role of tempering in machine tool castings

Hebei Fengquan Machinery Manufacturing Co., Ltd. is located in Botou City, Hebei Province, with convenient transportation and a good location. It is engaged in casting, machining, and machine tool manufacturing; The company. Laifengquan Machinery has always been dedicated to the manufacturing of heavy equipment, striving to become one of the solution providers for large cast iron measuring tools, granite measuring tools, large machine tools, and mechanical manufacturing solutions.

Machine tool castings; Tempering is a metal heat treatment in which the quenched workpiece is reheated to an appropriate temperature below the lower critical temperature, held for a period of time, and then cooled in a medium such as air, water, or oil. Below, we will introduce the function of tempering machine tool castings:

Reduce brittleness or internal stress. After quenching, steel parts have significant internal stress and brittleness. If not tempered in time, the steel parts often deform or even crack.

Improve organizational stability, so that the workpiece no longer undergoes organizational changes during use, thereby maintaining stable geometric dimensions and performance of the workpiece.

To obtain the required mechanical properties of the workpiece, the workpiece becomes brittle after quenching. In order to meet the different performance requirements of various workpieces, the hardness can be adjusted through appropriate tempering to reduce brittleness and the required toughness and plasticity.

For certain alloy steels that are difficult to soften after annealing, high-temperature tempering is often used after quenching to allow appropriate aggregation of carbides in the steel, reduce hardness, and facilitate cutting processing.

The reason why tempering of machine tool castings has these effects is that as the temperature increases, the atomic activity ability increases, and the atoms of iron, carbon, and other alloying elements in steel can diffuse quickly, achieving the rearrangement and combination of atoms, gradually transforming unstable unbalanced structures into stable equilibrium structures.

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