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Journal of Materials Science

, Volume 29, Issue 6, pp 1492–1496 | Cite as

Effects of Re-B modification on the strength and toughness of 30CrMn2Si cast steel

  • Yan -Pei Song
  • Quan -Shun Luo
  • Quan -De Chen
  • Yun -Gui Chen
Papers

Abstract

The effects of multi-modification on the strength and toughness of 30CrMn2Si cast steel were investigated. The mechanical properties tested include tensile strength; Charpy impact toughness from room temperature to −60 °C; hardness and fracture toughness. Microanalyses were carried out by optical microscopy, transmission electron microscopy, scanning electron microscopy, and X-ray diffraction, and included the microstructure and submicrostructure of martensites, residual austenites, the size and distribution of non-metallic inclusions, and the original austenite grain size. It was concluded that, with the hardness unchanged, the fracture toughness of the modified steel was raised to 95 MPa m1/2, 34% more than that of the un-modified steel, and the impact toughnesses at normal and low temperatures raised to 62 and 61.2 J cm-2, respectively, 67 and 75% more than those of the un-modified steel. Furthermore, the fracture strength and yield strength of the steel were increased by over 200 MPa.

Keywords

Polymer Grain Size Microstructure Electron Microscopy Scanning Electron Microscopy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • Yan -Pei Song
    • 1
  • Quan -Shun Luo
    • 1
  • Quan -De Chen
    • 1
  • Yun -Gui Chen
    • 1
  1. 1.Department of MaterialLuoyang Institute of TechnologyHenanP. R. China

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