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Final Report
出版Publications Office of the European Union, 2016
ISBN92795750079789279575006
URLhttp://books.google.com.hk/books?id=RD8YnQAACAAJ&hl=&source=gbs_api
註釋The aim of the project was to prevent surface cracking in continuous casting of steel. These are known to occur in the presence of precipitates of microalloying elements, mostly in the form of nitrides and carbides. The classical approach consists on modifying caster operation and alloying using numerical models. Fundamental knowledge on the precipitation kinetics is however still missing and should be gained by investigations on laboratory and slab samples. Slab samples in as-cast or heat treated conditions were investigated extensively by means of electron microscopy. This allowed detecting precipitates in the size range of some nanometers to few micrometers and determining their chemistry. Using automated analyses, the particle size distribution can be investigated and the nucleation history can be derived. In combination with several laboratory tests using different cooling conditions, stress and strains, it was possible to determine the effect of each parameter on the precipitation kinetics. This knowledge could be used to optimize the kinetic model of the MatCalc software. It succeeded to establish good correlations with the experimental work. Thus the model can be considered capable to forecast the precipitation of the main nitrides and carbides during the continuous casting process.