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Powder metallurgy of high speed-steel produced by solid state sintering and heat treatment

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Published/Copyright: August 7, 2015
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 106 Issue 8

Abstract

High-speed steel is successfully fabricated by solid state sintering of Fe, Co, WC, Mo2C, Cr3C2 and VC powders under vacuum. The sintering density, microstructure, phase structure, hardness, and transverse rupture strength of the specimens are examined. Results show that the density increases with increasing sintering temperature. Nearly full density is obtained without microstructural coarsening in the sintering temperature range of 1190–1210°C. The optimum sintering temperature for the steel is 1200°C. The suitable quenching temperatures range from 1200 to 1240°C. After heat treatments, the microstructure consists of a martensitic matrix (grain size ≈5 μm) with a homogeneous distribution of MC and M6C carbides (average size lower than 1 μm). The highest hardness of 68.5 ± 0.3 HRC and the maximum transverse rupture strength of 3.58 ± 0.12 GPa is obtained for the specimen tempered at 560°C.

Keywords: Powder metallurgy; High-speed steels; Solid phase sintering; Heat treatment; Transverse rupture strength
* Correspondence address, Prof. Zhi Li, Professor of School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, Hunan Province, P.R. China, Tel.: +86(0)73158292213, Fax: +86(0)73158292213, E-mail:

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Received: 2014-12-05
Accepted: 2015-02-10
Published Online: 2015-08-07
Published in Print: 2015-08-11

© 2015, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111239
Keywords for this article
Powder metallurgy; High-speed steels; Solid phase sintering; Heat treatment; Transverse rupture strength

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Effect of carbon on the solubility of nitrogen in slag
  5. Phase equilibria investigations and thermodynamic modeling of the PbO–Al2O3 system
  6. Experimental investigation of the phase equilibria in the Co–Fe–Ti ternary system
  7. Microstructural investigation on marforming and conventional cold deformation in Ni–Ti–Fe-based shape memory alloys
  8. Modeling of hot deformation behavior with dynamic recrystallization in TC4 titanium alloy
  9. Powder metallurgy of high speed-steel produced by solid state sintering and heat treatment
  10. Effect of annealing and surfactant on photoluminescence of ZnS:O2− nanoparticles
  11. An experimental investigation into the effects of Cr2O3 and ZnO2 nanoparticles on the mechanical properties and durability of self-compacting mortar
  12. Optical properties and weakening of elastic moduli with increasing glass transition temperature (Tg) in (80–x)TeO2-xBaO-20ZnO glasses
  13. Simple fabrication of highly ordered anodic aluminum oxide (AAO) films
  14. Short Communications
  15. Launching particle to constant reinforcement ratio as a parameter for improving the nanoreinforcement distribution and tensile strength of aluminum nanometal matrix composites
  16. Manganese ferrite–graphene nanocomposite as a high-performance anode material for lithium-ion batteries
  17. Facile synthesis of TiO2 nanoplates decorated with Ag nanoparticles for electro-oxidation of hydrazine
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