The As-Quenched Microstructure and Tempering Behaviour of Rapidly Solidified Tungsten Steels.

Abstract

Transmission electron microscopy and microhardness testing were used to examine the as-quenched structure and mechanical properties of a series of iron-tungsten-carbon alloys ranging from 6 to 23 % tungsten with a constant W:C atomic ratio of 2:1 and T1 tool steel. The iron-tungsten-carbon alloys were found to exhibit a significant change in microstructure and hardness as the tungsten and carbon content were increased. The change in morphology was from lath martensite in the lower tungsten alloys to a solidification structure of delta-ferrite cells surrounded by austenite and M6C carbide, in the higher tungsten alloys. An increase in the hardness from 700 kg/sq mm to 1050 kg/sq. mm accompanied this change in morphology. A model is proposed to explain the morphological change, in addition, the tempering behaviours of rapidly solidified Fe-6.3 wt%W-O.21wt%C, Fe-23wt%W-0.75wt%C and T1 tool steel were examined and compared to those observed for the conventional solution-treated and quenched alloys. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 12, 1980
Accession Number
ADA089042

Entities

People

  • B. Cantor
  • J. J. Rayment

Organizations

  • University of Sussex

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alloys
  • Carbon Alloys
  • Cellular Structures
  • Chemistry
  • Crystal Structure
  • Diffraction
  • Electron Microscopy
  • Engineering
  • Hardening
  • Hardness
  • Heat Treatment
  • Iron
  • Mechanical Properties
  • Microscopes
  • Solid Solutions
  • Transmission Electron Microscopy
  • Tungsten Alloys

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics