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Influence of Sintering Parameters on the Mechanical Performance of PM Steels Pre-alloyed with Chromium

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한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
초록

Powder grades pre-alloyed with 1.5-3 wt% chromium can be successfully sintered at the conventional temperature although well-monitored sintering atmospheres are required to avoid oxidation. Mechanical properties of the Cr-alloyed PM grades are enhanced by a higher sintering temperature in the range , due to positive effects from pore rounding, increased density and more effective oxide reduction. Astaloy CrM (Fe-3 wt% Cr-0.5 wt% Mo) with 0.6 wt% graphite added obtains an ultimate tensile strength of 1470 MPa and an impact strength of 31 J at density , after sintering at followed by cooling at and tempering.

저자
  • Bergman
  • Ola
  • Lindqvist
  • Bjorn
  • Bengtsson
  • Sven