INVESTIGATION OF THE EFFECT OF MOLYBDENUM AMOUNT ON WEAR BEHAVIOUR OF 17-4 PH STAINLESS STEEL PRODUCED BY POWDER METALLURGY


Nalcacioglu E., Ozyurek D., Cetinkaya K.

JOURNAL OF THE BALKAN TRIBOLOGICAL ASSOCIATION, cilt.22, ss.261-271, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 22 Konu: 1
  • Basım Tarihi: 2016
  • Dergi Adı: JOURNAL OF THE BALKAN TRIBOLOGICAL ASSOCIATION
  • Sayfa Sayıları: ss.261-271

Özet

In this study, dry sliding wear behaviour of 17-4 PH stainless steel alloys was investigated which were produced by powder metallurgy method by adding molybdenum at different amounts. Prepared alloy powders were cold pressing (800 MPa) to produce green compacts. Produced green compacts were sintered in 10(-6) mbar vacuum at 1300 degrees C for 1 h and cooled down to room temperature in the furnace. Sintered components were examined by scanning electron microscopy (SEM + EDS), X-ray diffraction (XRD), density and hardness measurements. Pin-on-disc apparatus was used for wear tests. Wear tests were performed at 0.8 m s(-1) sliding speed, 30 and 45 N loads, and at five different sliding distances between 600 and 3000 m. The results showed that increasing addition rate of Mo (0.5% - 1% - 2% - 4%) into the 17-4 PH stainless steel increased the density of the steels while decreased the hardness. It was also determined that the weight losses in 17-4 PH stainless steel alloy increased by the amount of Mo added.