Fabrication of plain carbon steel/high chromium white cast iron bimetal by a liquid–solid composite casting process

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• 作者：V. Javaheri ; H. Rastegari ; M. Naseri
• 关键词：bimetals ; carbon steel ; cast iron ; casting ; interfaces ; microstructure ; mechanical properties
• 刊名：International Journal of Minerals, Metallurgy, and Materials
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：22
• 期：9
• 页码：950-955
• 全文大小：3,125 KB
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• 作者单位：V. Javaheri (1)
  H. Rastegari (2)
  M. Naseri (1)
  
  1. Division of Research and Development, Isfahan Casting Industries Co. (ICI), Isfahan, 83551-1111, Iran
  2. Department of Engineering, Birjand University of Technology, Southern Khorasan, 97198-66981, Iran
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Mineral Resources
  
• 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
• ISSN：1869-103X

文摘

High-chromium white cast iron (HCWCI) is one of the most widely used engineering materials in the mining and cement industries. However, in some components, such as the pulverizer plates of ash mills, the poor machinability of HCWCI creates difficulties. The bimetal casting technique is a suitable method for improving the machinability of HCWCI by joining an easily machined layer of plain carbon steel (PCS) to its hard part. In this study, the possibility of PCS/HCWCI bimetal casting was investigated using sand casting. The investigation was conducted by optical and electron microscopy and non-destructive, impact toughness, and tensile tests. The hardness and chemical composition profiles on both sides of the interface were plotted in this study. The results indicated that a conventional and low-cost casting technique could be a reliable method for producing PCS/HCWCI bimetal. The interfacial microstructure comprised two distinct layers: a very fine, partially spheroidized pearlite layer and a coarse full pearlite layer. Moreover, characterization of the microstructure revealed that the interface was free of defects. Keywords bimetals carbon steel cast iron casting interfaces microstructure mechanical properties