CHROMIUM-ALLOYED FERRITIC STEEL AT HIGH RESISTANCE TO BUCKLES, SHEET MADE FROM SUCH STEEL AND METHOD OF MAKING SUCH STEEL

摘要

FIELD: metallurgy; production of stainless ferritic steel suitable for stamping at high degree of deformation and resistant to buckles. SUBSTANCE: chromium-alloyed steel is teemed at continuous casting in form of strip or slab obtaining equiaxial fine-grain structure practically containing no columnar grains. Composition of steel is as follows, mass- %: carbon, no more than 0.08; chromium, no less than 8; manganese, no more than 1.5; aluminum, lesser than 0.030; nitrogen, no more than 0.05; silicon, no more than 1.5; nickel, lesser than 2.0; the remainder being iron and admixtures. It is preferable that content of titanium is no less than 1.10% at satisfying the following relationship: (Ti•N)/Al≥0,14 and (Ti/48)/[(C/12)+(N/14)]1,5. EFFECT: high quality of sheet practically free from buckles and possessing high moldability; avoidance of intermediate annealing before reduction in cold state. 19 cl, 14 dwg, 8 tbl