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原文传递 Thermal transport properties of grey cast irons

题名：	Thermal transport properties of grey cast irons
作者：	Wang, Hsin;Porter, W.D.;Dinwiddie, R.B.;Hecht, R.L.;
关键词：	36 MATERIALS SCIENCE ;33 ADVANCED PROPULSION SYSTEMS ; CAST IRON; THERMAL DIFFUSIVITY; THERMAL CONDUCTIVITY; BRAKES; ROTORS
摘要：	Thermal diffusivity and thermal conductivity of grey cast iron have been measured as a function of graphite flake morphology, chemical composition, and position in a finished brake rotor. Cast iron samples used for this investigation were cut from``step block`` castings designed to produce iron with different graphite flake morphologies resulting from different cooling rates. Samples were also machined from prototype alloys and from production brake rotors representing a variation in foundry practice. Thermal diffusivity was measured at room and elevated temperatures via the flash technique. Heat capacity of selected samples was measured with differential scanning calorimetry, and these results were used to calculate the thermal conductivity. Microstructure of the various cast iron samples was quantified by standard metallography and image analysis, and the chemical compositions were determined by optical emission spectroscopy.
总页数：	8p
报告类型：	科技报告