Mini-Thixoforming of a Steel Produced by Powder Metallurgy

Jirková, H.; Aišman, D.; Sen, I.; Wagner, M.F.-X.; Behúlová, M.; Kusý, M.; Mašek, B.

doi:10.4028/www.scientific.net/SSP.192-193.500

Mini-Thixoforming of a Steel Produced by Powder Metallurgy (bibtex)

by H. Jirková, D. Aišman, I. Sen, M.F.-X. Wagner, M. Behúlová, M. Kusý, B. Mašek

Abstract:

Semi-solid processing is complicated by various inherent technical problems. However, once these problems are solved, thixoforming allows intricately shaped components to be manufactured very effectively – often with microstructures that cannot be produced by any other techniques. The recently introduced mini-thixoforming method is an example of such a novel technique for semi-solid processing of steel. The wall thicknesses of resulting parts are about 1 mm. Microstructures of semi-solid-processed steels typically consist of a high proportion of globular particles of metastable austenite embedded in a carbide network, the latter being much harder and more brittle. This paper illustrates that mini-thixoforming allows inverting that microstructural configuration. As an experimental material, powder steel with increased content of vanadium and chromium was used. The post-thixoforming microstructure consisted of a dispersion of carbides and high-vanadium and high-chromium eutectic in an austenitic matrix. Applying optimised processing parameters, complex-shaped parts could be produced. According to the high hardness of resulting microstructural components, the new materials are likely to exhibit extraordinary strength and wear resistance.

View PDF

Reference:

Jirková, H., Aišman, D., Sen, I., Wagner, M.F.-X., Behúlová, M., Kusý, M., Mašek, B.: Mini-Thixoforming of a Steel Produced by Powder Metallurgy, Solid State Phenomena 192-193, 500-505, 2013.

Bibtex Entry:

@Article{Jirkova2013,
  author   = {Jirkov\'{a}, H. and Ai\v{s}man, D. and Sen, I. and Wagner, M.F.-X. and Beh\'{u}lov\'{a}, M. and Kus\'{y}, M. and Ma\v{s}ek, B.},
  journal  = {Solid State Phenomena},
  title    = {{Mini-Thixoforming of a Steel Produced by Powder Metallurgy}},
  year     = {2013},
  issn     = {1662-9779},
  pages    = {500--505},
  volume   = {192-193},
  abstract = {Semi-solid processing is complicated by various inherent technical problems. However, once these problems are solved, thixoforming allows intricately shaped components to be manufactured very effectively – often with microstructures that cannot be produced by any other techniques. The recently introduced mini-thixoforming method is an example of such a novel technique for semi-solid processing of steel. The wall thicknesses of resulting parts are about 1 mm. Microstructures of semi-solid-processed steels typically consist of a high proportion of globular particles of metastable austenite embedded in a carbide network, the latter being much harder and more brittle. This paper illustrates that mini-thixoforming allows inverting that microstructural configuration. As an experimental material, powder steel with increased content of vanadium and chromium was used. The post-thixoforming microstructure consisted of a dispersion of carbides and high-vanadium and high-chromium eutectic in an austenitic matrix. Applying optimised processing parameters, complex-shaped parts could be produced. According to the high hardness of resulting microstructural components, the new materials are likely to exhibit extraordinary strength and wear resistance.},
  doi      = {10.4028/www.scientific.net/SSP.192-193.500},
  keywords = {Complex Shape Component, Mini-Thixoforming, Powder Metallurgy Steel},
  url      = {http://www.scientific.net/SSP.192-193.500},
}