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The influence of used work rolls profiling on the quality of hot rolled metal was studied. The defect non-flatness is the main reason for hot rolled metal rejection to second grade at the continuous hot rolling mill 1700 of ArcelorMittal Temirtau JSC. The most optimal among studied profiling is concave profiling with average cumulative value ΣΔ=1.71mm. This is evidenced by the least volume of hot rolled metal, rejected to the second grade due to non-flatness.There were mathematical models developed, forecasting the volume of metal, rolled with the defect non-flatness with definite cumulative profiling of work rolls.

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In this paper a computer modeling using program complex DEFORM of various models of equal channel angle pressing is made. Also there is a description of opinion of ECA-pressing called “ECA pressing with quasi-ultra-small angles of joint channels” and shown advantages of this opinion.

No abstract