Abstract
1. The use of preliminary heat treatment (refinement) has a significant effect on the average deformation of components formed by a sharp tool during gas carburizing and hardening in accordance with a continuous cycle. The effect of preliminary heat treatment on the stability (dispersion) of the deformation of an opening is insignificant in this case. 2. The effect of preliminary heat treatment on the average deformation of components formed by a dull tool is weakened. In this case, strain dispersion is reduced by several factors, and attains values close to the strain dispersion of components formed by a sharp tool. 3. Use of preliminary heat treatment for steel 12Kh2N4A components to be hardened by gas carburizing and hardening in accordance with a continuous cycle is expedient after the opening is formed by a dull cutting tool, when significant work-hardening develops, and also when holes are sized with mandrels.
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