Abstract
1. Intermediate annealing after stamping large preforms of steel 30KhGSNMA-VD can be accompanied by temper brittleness of kind II, which causes the formation of brittle cracks in subsequent grinding and quenching. 2. In order to prevent the formation of brittle cracks in stamped preforms, they should be subjected to sandblasting after grinding and decelerated heating for quenching in the final treatment.
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