Common cooling methods in the quenching of honing pipes

- Mar 17, 2021-

A single liquid quenching method. The honing tube or component is heated to austenitization and quenched into water, oil or other cooling medium, and then air is extracted for cooling after a predetermined time. Since the cooling medium is completed in a single cooling process, the single liquid quenching method. Two-liquid quenching method. In the cooling process, the cooling of the pearlite transformation zone is accelerated, and the martensite transformation zone is slowly cooled. Jet quenching. Large differences in the thickness of the workpiece and the honing tube are large and complex, so as to avoid uniform quenching stress, and to control the cooling rate of different parts in different stages of the cooling process in a good way to overcool. Graded quenching. Heating to austenitizing temperature or near the transformation temperature of the quenching martensite temperature of the cooling medium workpiece, after the residence time, the surface temperature of the workpiece gradually converges to remove the air cooling, and the cooling rate decreases. After the martensite transformation is completed, the method can be increased Toughness and reduce the deformation of the honing tube, one of the mold parts is usually used for quenching. Austempering. Heated to austenitizing temperature slightly higher than the temperature of the quenched workpiece, the hot isothermal bath stays in the Ms- point steel quenched steel, bainite in the lower part, to obtain a complete phase transformation or a mixed structure of bainite and martensite.

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