Effect of Porosity on the Mechanical Properties and Wear Performance of 2% Copper Reinforced Sintered Steel Used in Shock Absorber Piston Production


Yalcin B.

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, cilt.25, ss.577-582, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 25 Konu: 5
  • Basım Tarihi: 2009
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
  • Sayfa Sayıları: ss.577-582

Özet

Powder metallurgy (P/M) method has mainly been used to produce automobile parts such as self-lubrication beds, shock absorber parts, and gear wheels In order to investigate the effect of porosity on the mechanical and tribological properties in sintered steel, specimens with 10%, 15%, and 20% porosity were produced in a 10 mmx10 mmx55 mm prismatic shape by pre-alloying powders of the MPIF Fe-C-0 205 alloy used in the production of shock absorber pistons Sintering was carried out at 900 degrees C for 45 min in an argon atmosphere Tensile, charpy, and microhardness tests were performed on these specimens. In addition, the wear performance of a 2% Cu reinforced sintered steel alloy under dry sliding conditions was determined Metallographic studies such as pore formation, worn surface, and fractured surface analyses were performed by scanning electron microscopy and optical microscopy The results indicate that irregular pore formation tendencies increase with an increase in porosity (%). Furthermore, an increase in porosity was shown to decrease the mechanical properties and increase the wear trace area and the friction coefficient of sintered steel