| 摘要 |
FIELD: wheels, for trains and cars manufactured of malleable rolled alloyed steel of improved quality. SUBSTANCE: breakage of wheels and subsequent investigations revealed that one of causes of troubles, among other things, is insufficient toughness of quality steels used in manufacture of wheels. That is why new steel based on Cr-Ni-Mo has been developed. This steel, after special thermal treatment, attains higher toughness potential preserving all strength properties, for instance those of steel R7. EFFECT: reduced breakage of wheel at long breaking, increased strength. |
