On the microstructure scale for 15Kh1M1F steel

To specify technical requirements to the initial state of heat-resisting steels, the influence of structure on short-period mechanic and heat-resisting properties of hot-rolled pipes of 550x25mm size made of steel 15Kh1M1F has been investigated. The metal has been studied after plant and laboratory heat treatment. It has been established, that in existing requirements to the structure and properties of steel 15Kh1M1F there are certain contradictions. It is recommended to eliminate the microstructure scale and to adjust requirements to short-period mechanic properties. Norms of short-period mechanic properties has been suggested