Direct fabrication of high-performance high speed steel products enhanced by LaB6

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

6 Scopus Citations
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Author(s)

  • Zhang Qiankun
  • Jiang Yao
  • Shen Weijun
  • Zhang Huibin
  • He Yuehui
  • Lin Nan
  • Huang Han
  • Huang Xiaolin

Detail(s)

Original languageEnglish
Pages (from-to)469-478
Journal / PublicationMaterials and Design
Volume112
Publication statusPublished - 15 Dec 2016

Abstract

A direct fabrication technology (DFT) without smelting has been developed for fabricating sophisticated high speed steel products with low pollution, near-net shaping and short process. The steel consisting of (wt.%): 6.4W, 5.0Mo, 4.2Cr, 3.1V, 8.5Co and 1.28C, was fabricated as exemplary material. The activated and reactive sintering of green compacts under vacuum with low activation energy, redox reaction enhanced diffusion and the construction of concentration gradient of alloying elements around pores, promotes the nearly full densification (> 99.40%). Also, the DFT steels show high purity and superior mechanical properties. Minor strengthening agent LaB6 (0.1 wt.%), which is easily to be accurately introduced in DFT, obviously increases the hot hardness, temper resistance, bend strength and toughness of DFT M3:2. The strengthening effect of boron atoms and La-rich complexes are proposed to directly result in the high hot hardness and temper resistance of LaB6 containing steel.

Research Area(s)

  • Direct fabrication, High speed steel, Hot hardness, Impurity segregation, Powder metallurgy, Rare earth

Citation Format(s)

Direct fabrication of high-performance high speed steel products enhanced by LaB6. / Qiankun, Zhang; Yao, Jiang; Weijun, Shen; Huibin, Zhang; Yuehui, He; Nan, Lin; C.T., Liu; Han, Huang; Xiaolin, Huang.

In: Materials and Design, Vol. 112, 15.12.2016, p. 469-478.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review