FIELD: mechanical engineering; manufacture of Northern design articles and analysis of causes of low impact viscosity of welded joints and prevention of them.
SUBSTANCE: proposed method consists in finding-out dependence of grain size of microstructure and presence of ferrite net, as wells as marks on bearing faces of tested specimens for products of the same type made from steel of definite quality during analysis of causes of low impact viscosity recommended standards are established for these parameters and dependences thus found are compared with the data of specimens of low (below standard norm) impact viscosity and these data are estimated for compliance with the recommended standards. Dependences thus found are used repeatedly and constantly.
EFFECT: operative determination of causes of low impact viscosity; possibility of excluding these causes.
4 dwg, 1 tbl
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