The stress-strain state of metal in deformation zone under the screw compression is considered using a mathematical model of process. This model allows to determine the limiting tangential stresses in a workpiece at the exit of deformation zone, which do not lead to the destruction provided by twist in the process of deformation.

The article discusses the impact of the structure of the surface layer of hardened steel used for the manufacture of parts experiencing high loads during operation, on the processes of crack formation. The presence of a defective layer on the surface of the car, located in the area of decarburization, determines the use of mechanical treatment to remove it, which is not economically feasible in mass production. The need for this technological scheme is also caused by constantly increasing demands on the quality of the surface of finished parts (fingers of tracks of tracked vehicles (GM), torsion bars, shafts and axles for various purposes, etc.) made of hot-rolled (hot-rolled) solid and pipe products, for highly loaded models of equipment (high static and dynamic loads). When processing bodies of revolution, depending on the diameter and length of the workpieces, machining schemes can be found in some cases that have advantages even over turning. For example, when designing new equipment for cleaning the outer surface of cylindrical billets, a suitable processing scheme may be high-temperature thermomechanical processing (HTTT) with screw compression (VO) deformation with simultaneous removal of scale during deformation.

The article considers the optimality criteria in the development of hardening technologies for critical parts of engineering products. It also presents a forecasting method for product quality indices in the process of high-temperature thermomechanical treatment with deformation by screw compression of hot-rolled heavy-walled pipes.

Mathematical model and numerical calculation results for the thermal state of cylindrical hollow track link pins’ workpiece are given. Numerical calculation results of heat exchange parameters depending on geometry, thermophysical properties and processing duration are analyzed.