Inequigranularity in seamless-rolled rings of alloy ÉI437BVD

The problem of improving the quality of semiproducts made of the widely used alloys Type EI437BVD is still fairly serious. For instance, in the production of seamless-rolled rings of alloy EI437B there is substantial inequigranularity in different zones of these semiproducts, and that greatly impairs the level and stability of their mechanical properties. The specifics of the expanding of the rings makes its mark on the process of recrystallization of the alloy. We therefore investigated the grain size in different zones of rings with shaped section after heat treatment in different regimes.