Metallurgical and Materials Transactions B

, Volume 44, Issue 5, pp 1144–1154 | Cite as

Basic Research on Precipitation and Control of BN Inclusions in Steel

  • Yu-Nan Wang
  • Yan-Ping Bao
  • Min Wang
  • Le-chen Zhang
  • Ya-nan Chen
Article
First Online:

Abstract

The influencing factors on precipitation and the suitable controlling conditions of BN inclusions were not reported until now, although it has been proven that BN could improve the cutting performance of steel. The precipitation and control of BN inclusions have been investigated in detail in this article. First, the precipitation behaviors of main inclusions in steel have been investigated by theoretical calculation, especially those of BN inclusions. Then, the directional solidification and heat treatments were applied to study the precipitation of BN inclusions realistically, and the microstructures of steels under different cooling rates have been analyzed. The variation laws of size, distribution, and area ratio of BN inclusions were discussed under conditions of quantitative control of chemical composition and cooling rate of steel. The variation laws and the main influencing factors of precipitation of BN inclusions in steel have been obtained and the suitable controlling conditions have been proposed. Finally, it is validated with a cutting experiment that the cutting performance and the chip-breaking performance of steel have been greatly improved by BN inclusions precipitated in the suitable control conditions.

Keywords

Cool Rate Directional Solidification Flank Wear 42CrMo Steel P122 Steel 
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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Notes

Acknowledgment

This research was supported financially by the National Natural Science Foundation of China (No. 51274029) and China Postdoctoral Science Foundation (No. 2012M510319).

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2013

Authors and Affiliations

  • Yu-Nan Wang
    • 1
    • 2
  • Yan-Ping Bao
    • 1
    • 2
  • Min Wang
    • 3
  • Le-chen Zhang
    • 1
    • 2
  • Ya-nan Chen
    • 1
    • 2
  1. 1.State Key Laboratory of Advanced Metallurgy, University of Science and Technology BeijingBeijing P.R. China
  2. 2.School of Metallurgical and Ecological Engineering, University of Science and Technology BeijingBeijing P.R. China
  3. 3.National Engineering Research Center of Flat Rolling EquipmentUniversity of Science and Technology BeijingBeijingP.R. China

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