Properties of tungsten wire in powder metallurgical processing with ultrafine powder

Authors

  • L. A. Barkov South Ural State University, Chelyabinsk
  • M. N. Samodurova South Ural State University, Chelyabinsk
  • S. A. Mymrin SPA “PROMIN”, Chelyabinsk
  • Yu. S. Latfulina South Ural State University, Chelyabinsk

DOI:

https://doi.org/10.14529/met160317

Keywords:

sintering, ultrafine powder, wire, properties

Abstract

The paper presents the results of the investigation of properties of the tungsten wire obtained from powders with particle sizes from 1 to 5 μm with the addition of ultrafine powders with particle sizes of less than 0.5 μm produced by the reduction of hydrogen plasma at a high temperature. Different compositions of mixtures were studied and a new optimal composition was developed. Methods of its compressing and presintering of bars were also developed. The results showed that mechanical and performance properties of the wire with a new composition have higher stability compared to the properties of the wire obtained by the standard technology. They allowed:

– to lower the creep for the wire with the diameter of 1250 μm,

– to achieve a stapel structure for the wire with the diameter of 650–1450 μm;

– to improve the spiralability of the wire;

– to increase the good-to-bad yield to 3.79 % for the wire with the diameter of 120 μm.

Downloads

Published

2016-11-16

Issue

Vol. 16 No. 3 (2016)

Section

Physical Chemistry and Physics of Metallurgical Systems