Chemical Composition and Physical Properties for China Railway Grade B Cast Steel Wheel
Chemical composition and physical properties are measured and inspected for China railway grade B cast steel wheel. The wheel shows slight higher for chemical elements C and Cr, much higher for Al and Mo, and significant lower for P and S comparing to the AAR code. Gross pearlites plus net-like continuum ferrites appear in wheel hub; ferrites exhibit also net-likely but dis-continuously in web with a shot peening effect; and in rim, dis-continuous ferrites with few of net-like signs distribute randomly due to a quenching and tempering effect. Bigger hardness values appear in rim; and the values in web and hub appear a decrease in sequence. Major flaw affecting material condense is shrinkage porosities. Flawed content is closely between hub and web. More condense appears in rim. Material inclusions are non-metallic compounds of MnS and Al2O3. They appear sphere-like shapes having around 8 μm diameters.
Y. X. Zhao et al., "Chemical Composition and Physical Properties for China Railway Grade B Cast Steel Wheel", Key Engineering Materials, Vols. 480-481, pp. 42-46, 2011