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PM high speed steel with high performance manufactured by super-fine powder with low oxygen content
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University of Science and Technology Beijing

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    Abstract:

    In this paper, super-fine high-speed steel powders with low oxygen content were prepared by electroslag remelting and atomizing technology, and high-performance PM high-speed steels were fabricated by non-capsule hot isostatic pressing technique. The effects of different particle size and oxygen content of high-speed steel powders on sintering characteristics, microstructure and performance were studied. The results showed that due to the high-speed steel powder with the particle size of less than 12 μm and lower than 100 ppm oxygen, the as-sintered microstructure was uniform and carbides were fine. After heat treatment, the bend strength, impact toughness and hardness reached 4200 MPa, 22 J, and 65 HRC, respectively.

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[Sun Haixia, Chen Cunguang, Zhang Zhenwei, Guo Zhimeng. PM high speed steel with high performance manufactured by super-fine powder with low oxygen content[J]. Rare Metal Materials and Engineering,2019,48(10):3246~3251.]
DOI:10.12442/j. issn.1002-185X.20180341

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History
  • Received:April 07,2018
  • Revised:April 24,2018
  • Adopted:May 18,2018
  • Online: November 01,2019
  • Published: