INEQUIGRANULARITY IN SEAMLESS-ROLLED RINGS OF ALLOY E1437BVD

The problem of improving the quality of semiproducts made of the widel y used alloys type EI437BVD is still fairly serious. For instance, in the production of seamless-rolled rings of alloy EI437B there is subst antial inequigranularity in different zones of these semiproducts, and that greatly impairs the level and stability of their mechanical prop erties. The specifics of the expanding of the rings makes its mark on the process of recrystallization of the alloy. We therefore investigat ed the grain size in different zones of rings with shaped section afte r heat treatment in different regimes.