Microstructures and Mechanical Properties of Ductile Cast Iron with Different Crystallizer Inner Diameters
نویسندگان
چکیده
Five types of ductile cast irons (DCIs) were fabricated by crystallizers with different inner diameters, as well five austempered (ADIs) after the same isothermal quenching process. The effects amount, diameter, and morphology graphite on mechanical properties DCI ADI effect original as-cast microstructure austempering studied. microstructures characterized optical microscopy, scanning electron X-ray diffraction. Their examined tensile, U-shaped impact, hardness tests. As diameter crystallizer increases from 60 mm to 150 mm, nodular ~10 ~50 ?m, nodularity rate decreases 100 70%. average ultimate tensile strength ~500 MPa in state 1100 ~180 HB 400 HB. elongation 11 4.6% 7 4.5%. Through research this paper, it can be seen that ADIs matrix obtained through process, casting selected according performance requirements, which reduce nitrite pollution cost.
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ژورنال
عنوان ژورنال: Crystals
سال: 2022
ISSN: ['2073-4352']
DOI: https://doi.org/10.3390/cryst12030413