Abstract
The article presents the influence of multistage cryogenic treatment (MCT) on the microstructure and properties of X153CrMoV12 cold work steel. Basic mechanical properties of steel, such as hardness and wear resistance (3 rolls-cone system) were tested. The microstructure of steel was observed by means of scanning microscopy. Test results were compared with the properties of steel subjected to conventional heat treatment and deep cryogenic treatment (DCT). The cryogenic processes of X153CrMoV12 steel influenced on the percentage of strengthening phases in the material matrix microstructure. In the case of MCT and DCT, similar changes in the microstructure were observed, consisting in increasing of the amount, more uniform distribution and refinement of carbide phases. Changes in the microstructure of steel affected the mechanical properties of the material.
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