Technological support of workpiece surface quality based on local cryogenic impact during processing of austenitic steels

An analysis of methods for crushing chips when processing difficult-to-cut materials was carried out. The process of cutting workpieces from austenitic steels is considered based on preliminary local cryogenic action on the surface being processed with the creation of a strengthened zone with a fine-grained structure. A model for the implementation of local cryogenic effects on the processed surfaces of workpieces has been constructed. The dimensional parameters of the hardened zone with a fine-grained structure have been determined, which helps ensure stable segmentation and crushing of drain chips, as well as achieving high quality of machined surfaces of the workpiece after applying a preliminary cryogenic effect. The influence of cryogenic exposure on the processing of austenitic steels is shown.