Título

SOME ASPECTS OF THE MODELING OF AUSTENITIC GRAIN SIZE CONTROL IN MICROALLOYED STEELS

SOME ASPECTS OF THE MODELING OF AUSTENITIC GRAIN SIZE CONTROL IN MICROALLOYED STEELS

Autoria

Silva, André Luiz Vasconcellos da Costa e

DOI

10.5151/2594-5297-35018

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Resumo

THE UNDERSTANDING AND MODELING OF THE EFFECTS OF NB IN MICROALLOYED STEELS HAS SIGNIFICANTLY EVOLVED SINCE THEIR INTRODUCTION IN THE 1960S. HOWEVER, MOST OF THE EFFORTS HAVE BEEN FOCUSED ON THE RELATIVELY LOW TEMPERATURE HOT ROLLING OF FLAT PRODUCTS. IN THIS PAPER WE DISCUSS HOW SOLUTE DRAG AND PARTICLE DRAG WHERE SOMEWHAT LUMPED WHEN THE MODELING OF HOT ROLLING OF FLAT PRODUCTS HAS EVOLVED AND HOW THIS LED TO OVERLOOKING OF THE SOLUTE DRAG EFFECT, WHICH CAN HAVE IMPORTANT EFFECTS IN OTHER ROLLING CONDITIONS AND IN COMBINATION WITH OTHER ELEMENTS, EG B. FURTHERMORE, THE CURRENT MODELING OF PRECIPITATION AND RECRYSTALLIZATION IS BRIEFLY REVIEWED WITH SOME EMPHASIS ON THE PROGRESS ON THE USE OF COMPUTATIONAL THERMODYNAMIC TOOLS. FINALLY, SOME EXAMPLES OF HOW THE MODELING USE COMPUTATIONAL THERMODYNAMIC CAN BE IMPROVED ARE PRESENTED. IT IS PROPOSED THAT, IN ORDER TO FULLY USE THE POTENTIAL OF MICROALLOYING ELEMENTS IN STEELS, THE FUNDAMENTAL PHENOMENA OCCURRING SHOULD NOT BE OVERLOOKED AND WE SHOULD NOT TRY TO ALWAYS EXTEND THE SUCCESSFUL PARADIGM DEVELOPED FOR FLAT PRODUCT HOT ROLLING TO ALL APPLICATIONS OF MICROALLOYING.

 

THE UNDERSTANDING AND MODELING OF THE EFFECTS OF NB IN MICROALLOYED STEELS HAS SIGNIFICANTLY EVOLVED SINCE THEIR INTRODUCTION IN THE 1960S. HOWEVER, MOST OF THE EFFORTS HAVE BEEN FOCUSED ON THE RELATIVELY LOW TEMPERATURE HOT ROLLING OF FLAT PRODUCTS. IN THIS PAPER WE DISCUSS HOW SOLUTE DRAG AND PARTICLE DRAG WHERE SOMEWHAT LUMPED WHEN THE MODELING OF HOT ROLLING OF FLAT PRODUCTS HAS EVOLVED AND HOW THIS LED TO OVERLOOKING OF THE SOLUTE DRAG EFFECT, WHICH CAN HAVE IMPORTANT EFFECTS IN OTHER ROLLING CONDITIONS AND IN COMBINATION WITH OTHER ELEMENTS, EG B. FURTHERMORE, THE CURRENT MODELING OF PRECIPITATION AND RECRYSTALLIZATION IS BRIEFLY REVIEWED WITH SOME EMPHASIS ON THE PROGRESS ON THE USE OF COMPUTATIONAL THERMODYNAMIC TOOLS. FINALLY, SOME EXAMPLES OF HOW THE MODELING USE COMPUTATIONAL THERMODYNAMIC CAN BE IMPROVED ARE PRESENTED. IT IS PROPOSED THAT, IN ORDER TO FULLY USE THE POTENTIAL OF MICROALLOYING ELEMENTS IN STEELS, THE FUNDAMENTAL PHENOMENA OCCURRING SHOULD NOT BE OVERLOOKED AND WE SHOULD NOT TRY TO ALWAYS EXTEND THE SUCCESSFUL PARADIGM DEVELOPED FOR FLAT PRODUCT HOT ROLLING TO ALL APPLICATIONS OF MICROALLOYING.

Palavras-chave

Computational thermodynamics, Niobium, Recrystallization, solute drag

Computational thermodynamics, Niobium, Recrystallization, solute drag