Isothermally hardened ductile and vermicular cast irons – influencing properties

Skrbek Břetislav - TU v Liberci (Czech Republic)

Isothermally hardened ductile and vermicular cast irons – ADVI. Only normalized ADI according to ČSN 42 0960 EN 1564. Common applications and their advantages. Semi-finished products for the production of test bars according to ČSN 42 0316 from four melts. Composition and initial structures with pearlitic or ferritic matrix. Tests during isothermal exposures at 280, 350, 380, and 410°C. Freezing in liquid nitrogen and filling. Theoretical strength according to Prof. Dorazil. Toughness from values of strength Rm and elongation A. Metallography. Processing of data into graphs and regression models. Discussion, findings. Direction of further research.

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