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Microstructural changes of high speed steel powders during heating in vacuum

Journal Article


Abstract


  • The microstructural changes of M2 and M4 high speed steel powders were investigated during heating in the vacuum of 7 × 10-2Pa. Both M6 and MC carbides only grew from 1-2 μm to 3-4 μm if heating to 1220-1225°C, 15-20°C below the solidus of HSS. When it is heated above the solidus, the particle size of carbides especially for M6C rapidly and non-homogeneously is increased. When the temperature is elevated from 1220°C to 1250°C, M4C3 is transformed to MC, in which main part of Fe should be substituted by V. M6C will be turned into M2C at the temperature higher than 1260°C. The oxygen content is decreased to lower than 100 × 10-6 after deoxidization.

Publication Date


  • 2003

Citation


  • Zhao, Y., Wang, C., & Yang, K. (2003). Microstructural changes of high speed steel powders during heating in vacuum. Fenmo Yejin Jishu/Powder Metallurgy Technology, 21(3), 145-150.

Scopus Eid


  • 2-s2.0-0344272183

Web Of Science Accession Number


Start Page


  • 145

End Page


  • 150

Volume


  • 21

Issue


  • 3

Abstract


  • The microstructural changes of M2 and M4 high speed steel powders were investigated during heating in the vacuum of 7 × 10-2Pa. Both M6 and MC carbides only grew from 1-2 μm to 3-4 μm if heating to 1220-1225°C, 15-20°C below the solidus of HSS. When it is heated above the solidus, the particle size of carbides especially for M6C rapidly and non-homogeneously is increased. When the temperature is elevated from 1220°C to 1250°C, M4C3 is transformed to MC, in which main part of Fe should be substituted by V. M6C will be turned into M2C at the temperature higher than 1260°C. The oxygen content is decreased to lower than 100 × 10-6 after deoxidization.

Publication Date


  • 2003

Citation


  • Zhao, Y., Wang, C., & Yang, K. (2003). Microstructural changes of high speed steel powders during heating in vacuum. Fenmo Yejin Jishu/Powder Metallurgy Technology, 21(3), 145-150.

Scopus Eid


  • 2-s2.0-0344272183

Web Of Science Accession Number


Start Page


  • 145

End Page


  • 150

Volume


  • 21

Issue


  • 3