%0 Journal Article
%T Investigations upon the indefinite rolls quality assurance in multiple regression analysis
%A Kiss
%A I.
%J Revista de Metalurgia
%D 2012
%I Consejo Superior de Investigaciones Cient赤ficas
%X The rolling rolls quality has been enhanced mainly due to the improvements of the chemical compositions of rolls materials. The realization of an optimal chemical composition can constitute a technical efficient mode to assure the exploitation properties, the material from which the rolling mills rolls are manufactured having a higher importance in this sense. This paper continues to present the scientifically results of our experimental research in the area of the rolling rolls. The basic research contains concrete elements of immediate practical utilities in the metallurgical enterprises, for the quality improvements of rolls, having in last as the aim the durability growth and the safety in exploitation. This paper presents an analysis of the chemical composition, the influences upon the mechanical properties of the indefinite cast iron rolls. We present some mathematical correlations and graphical interpretations between the hardness (on the working surface and on necks) and the chemical composition. Using the double and triple correlations which is really helpful in the foundry practice, as it allows us to determine variation boundaries for the chemical composition, in view the obtaining the optimal values of the hardness. We suggest a mathematical interpretation of the influence of the chemical composition over the hardness of these indefinite rolling rolls. In this sense we use the multiple regression analysis which can be an important statistical tool for the investigation of relationships between variables. The enunciation of some mathematically modeling results can be described through a number of multi-component equations determined for the spaces with 3 and 4 dimensions. Also, the regression surfaces, curves of levels and volumes of variations can be represented and interpreted by technologists considering these as correlation diagrams between the analyzed variables. In this sense, these researches results can be used in the engineers collectives of the foundries and the rolling mills sectors, for quality assurances of rolls as far back as phase of production, as well as in exploitation of these, what lead to, inevitably, to the quality assurance of produced laminates. Con este trabajo se ha logrado asegurar la calidad de los cilindros de laminaci車n, debido fundamentalmente a la aportaci車n de una determinada composici車n qu赤mica a los materiales cil赤ndricos. Esta composici車n qu赤mica mejorada, puede desarrollar de una forma efiicaz las propiedades de explotaci車n, donde estos cilindros de laminaci車n podr芍n ser fabricados, ofreciendo mejores resu
%K Indefinite rolls
%K Optimal chemical composition
%K Regression analysis
%K Hardness
%K Mathematical correlations
%K Cilindros
%K Composici車n qu赤mica 車ptima
%K An芍lisis de regresi車n m迆ltiple
%K Dureza
%K Relaciones matem芍ticas
%K Adiciones gr芍ficas
%U http://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/1228/1239