FIELD: metallurgy.
SUBSTANCE: method includes hot rolling with specified temperature conditions, cold rolling with following annealing and temper rolling of coiled strips. Blank of thickness 2.2…2.6 mm is received by means of rolling on continuous rolling mill at temperature in its sixth mill, equal to 1060…1100°C, with finishing temperature 865…895°C and winding temperature 560…600°C, cold rolling is implemented up to thickness 0.7…0.9 mm, and temper rolling of cold-rolled strips after annealing in furnaces with hydrogenous or nitrogenous atmosphere is implemented with cobbing in limits 1.0±0.1%.
EFFECT: guaranteed increased resistance to steel aging.
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Authors
Dates
2009-07-10—Published
2008-01-23—Filed