Soviet Powder Metallurgy and Metal Ceramics

, Volume 22, Issue 1, pp 39–44 | Cite as

Structure and mechanical and corrosion properties of P/M Kh23N18 stainless steel

  • I. D. Radomysel'skii
  • S. G. Napara-Volgina
  • L. N. Orlova
  • L. M. Apininskaya
  • A. K. Grabchak
  • N. M. Vergeles
Test Methods and Properties of Powder Metallurgical Materials

Conclusions

HVP and HFPB of a prealloyed powder enable high-density Kh23N18 stainless steel to be obtained exhibiting good mechanical and corrosion properties. Such steel, when produced by any of the processes investigated, is superior in strength to cast steel; its elongation and corrosion resistance are comparable to or better than those of cast steel only when additional operations of presintering of blanks and diffusional annealing after hot plastic working are employed. The mechanical and corrosion characteristics of Kh23N18 steel produced by the HVP method from a mixture of iron, chromium, and nickel metal powders are satisfactory, but appreciably poorer than those of the same steel obtained from an alloy powder. Use of a prealloyed powder with a small carbonyl nickel powder addition in the manufacture of Kh23N18 steel by the HFPB method makes it possible markedly to activate the processes taking place during the presintering and short-time heating of porous blanks for HFPB, which manifests itself in an improvement in their strength and ductility characteristics. For the production of P/M Kh23N18 steel and other sintered stainless steels of the austenitic class on an industrial scale the hot-forging method is recommended, since it requires a simpler installation and enables parts of complex configuration to be produced.

Keywords

Corrosion Resistance Cast Steel Plastic Working Corrosion Property Nickel Powder 

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Literature cited

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Copyright information

© Plenum Publishing Corporation 1983

Authors and Affiliations

  • I. D. Radomysel'skii
    • 1
  • S. G. Napara-Volgina
    • 1
  • L. N. Orlova
    • 1
  • L. M. Apininskaya
    • 1
  • A. K. Grabchak
    • 1
  • N. M. Vergeles
    • 1
  1. 1.Institute of Materials ScienceAcademy of Sciences of the Ukrainian SSRUkraine

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