Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

Yazarlar: Mehmet Akif ERDEN

Konular:Malzeme Bilimleri, Ortak Disiplinler

DOI:10.28948/ngumuh.298186

Anahtar Kelimeler:Powder metallurgy,Powder metallurgy steels,Pressing pressure,Microstructure,Mechanical properties

Özet:    In this work, pressing pressure on microstructure and mechanical properties of non-alloyed powder metallurgy (PM) steels were investigated. The mixed powders prepared in the predetermined proportions were pressed unidirectionally under 650, 700, 750, 800 and 850 MPa. Samples of the tensile experiment were turned into blocks by squeezing with the mould which had been prepared according to ASTM (E 8M) standards of powder metal material tension sample. The pressed samples were sintered at argon atmosphere at 1200ºC for 1 hour. The microstructure of the PM steels was characterised by optic microscope, SEM and EDS. Results indicated that PM steel pressed at 750 MPa showed the highest values of yield strength and ultimate tensile strength. However, when the amount of pressing pressure increased from 750 MPa to 850 MPa, yield strength, ultimate tensile strength and elongation decreased. 

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