Effect of Structure on the Dynamic Crack Resistance and Special Features of the Micromechanism of Crack Growth in Steel 35Kh After Cold Radial Forging

Resumo

The structure, dynamic crack resistance, strength and micromechanisms of crack growth are studied in tubular billets from steel 35Kh after different variants of deformation and heat treatment including cold plastic deformation by radial forging followed by annealing. The radial forging with subsequent post-deformation annealing is shown to affect positively the strength and the dynamic crack resistance of the metal. Quantitative analysis of the micromechanism of crack growth is made after tests for dynamic crack resistance. Special features of the formation of macro-splits are determined.