Effect of vibration frequency on microstructure and performance of high chromium cast iron prepared by lost foam casting

Abstract

In the present research, high chromium cast irons (HCCIs) were prepared using the lost foam casting (LFC) process. To improve the wear resistance of the high chromium cast irons (HCCIs), mechanical vibration was employed during the solidification of the HCCIs. The effects of vibration frequency on the microstructure and performance of the HCCIs under as-cast, as-quenched and as-tempered conditions were investigated. The results indicated that the microstructures of the LFC-produced HCCIs were refined due to the introduction of mechanical vibration, and the hardness was improved compared to that of the alloy without vibration. However, only a slight improvement in hardness was found in spite of the increase of vibration frequency. In contrast, the impact toughness of the as-tempered HCCIs increased with an increase in the vibration frequency. In addition, the wear resistance of the HCCIs was improved as a result of the introduction of vibration and increased with an increase in the vibration frequency.

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Correspondence to Wei Li.

Additional information

Male, born in 1963, Ph.D. Professor. His research interests mainly focus on abrasion metallic materials and metal matrix composites, special functional metallic materials, tribological research and biomedical materials.

This work was financially supported by the Science and Technology Plan Project of Guangdong province, China (2015B090926012, 2014B090901001034, 2014YT02C036, 2013B090500106, 2013CX/G18) and the Scientific Research and Innovation Project of Jinan University (No. 21615437).

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Zou, Wq., Zhang, Zg., Yang, H. et al. Effect of vibration frequency on microstructure and performance of high chromium cast iron prepared by lost foam casting. China Foundry 13, 248–255 (2016). https://doi.org/10.1007/s41230-016-6037-3

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Keywords

  • high chromium cast iron
  • vibration frequency
  • lost foam casting
  • microstructure
  • wear resistance

CLC numbers

  • TG143.9