Potential use of continuous cooling curves for prediction of solidification structure of nodular iron casting sections

• Type: Article in International Scientific Journal
• Date: 1999

Authors

Luís Filipe Malheiros (Author) FEUP; Carlos Silva Ribeiro (Author) FEUP

Journal

Title: International Journal of Cast Metals Research

Vol. 11 No. 5

Pages: 375-380

ISSN: 1364-0461

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 1 Citation

Other information

Authenticus ID: P-001-5TK

Abstract (EN): This article describes an evaluation procedure to forecast the structure resulting from a certain reaction which uses a thermal analysis technique based upon cooling curves, taken from the geometrical centre of casting sections, in order to evaluate the heat released during the transformation reaction. The method has been applied to the study of the solidification of some nodular, lamelar and ledeburitic melts; special emphasis has been given to the study of the solidification of nodular cast irons. The mathematical model, already described by some authors, allows the evaluation of the heat of solidification and the error associated. Three types of test castings have been used: a step casting, with decreasing section thickness, isolated sections with the same thickness as the different sections of the step casting and, finally, a TecTip cartridge. The results obtained let us suggest that the neutral body has to be generated very wisely in order to avoid the influence of the sharp transition, which occurs at the end of the solidification in the first derivative of the cooling curve of the real section, on the value calculated for the heat of solidification.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6