Mechanical and Physical Characters of the Cast Steel for Chinese Railway Rolling Wagon Bogie Frames

Abstract:

Chemical composition, metallurgical photos, macro- and micro-hardness values, macrostructures, inclusions, denseness, mechanical properties are experimentally investigated on the grade B cast steel for the bogie frames of Chinese railway rolling wagons. Results reveal that the material consists of ferrites and pearlites. Micro-hardness values of the ferrites are significant lower those of pearlites to indicate the ferrites is the weakest phase of material. Casting flaws are mainly point-network like eutectic sulfur compounds and polygonal sphere like Al2S3 compounds. Lower Young's modulus, higher proportion of yielding to ultimate strengths, higher reduction of area, and a lower elongation than those of conventional ferrous alloys are exhibited. These characters are contributed to the non-sharp cast flaws. The flaws play roles of two effects. One is to benefit anti-vibration capacity and fracture roughness. And another is to decrease the mechanical strengths.

• Periodical: Advanced Materials Research (Volumes 118-120)
• Pages: 90-94
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.118-120.90
• Online since: June 2010
• Authors: Yong Xiang Zhao, Bing Yang
• Keywords: Bogie Frame, Cast Steel, Mechanical Property, Microstructure, Railway

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