Abstract

Tests were carried out on the static crack resistance of sheet metal for experimental melts of highstrength martensitic-bainitic steel. They showed significant differences in the quality of the metal in this characteristic with relatively small differences in the content of alloying elements and production technology. A comparative metallographic analysis of the structural state of the metal, which differs in crack resistance, is performed. Based on the results of this analysis, the main microstructural factors are identified that correlate with the static crack resistance of the investigated material.

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