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Yapılan bu çalışmada, toz metalürjisi ile farklı presleme basınçları ile üretilen Fe-%3Si-%2Ni-%0,35Gr bileşimine sahip alaşımlarının sabit yük altında aşınma davranışları incelenmiştir. Türbüla tipi değirmende 20 dk karıştırılan tozlar üç farklı (300 MPa, 500 MPa ve 700 MPa) presleme basıncı kullanılarak preslenmiş ve ham numuneler üretilmiştir. Üretilen ham numuneler argon gazı atmosferinde, 1200 °C sıcaklıkta 30 dakika sinterlenmiştir. Üretilen numuneler, mikro yapı incelemeleri, sertlik ve yoğunluk ölçümleri ile karakterize edilmiştir. Sinterleme öncesi ve sonrası yoğunluk ölçümleri yapılmış ve gözeneklilik oranı belirlenmiştir. Aşınma testleri standart pin on disk aşınma tipi test cihazında 50 N yük altında 3 farklı (1000 m, 2000 m ve 3000 m) kayma mesafesi kullanılmıştır. Elde edilen sonuçlarda artan presleme basıncı ile yoğunluğun arttığı ve beraberinde gözenek oranının azaldığı görülmüştür. Aşınma testleri sonucunda en yüksek ağırlık kaybının 500 MPa basınçla preslenen alaşımda elde edilirken, en düşük ağırlık kaybının 700 MPa basınçla preslenen alaşımda elde edilmiştir.
In this study, we have studied the compounding behaviour under a fixed load of the alloys with the Fe-%3Si-%2Ni-%0,35Gr composition produced with different pressing pressures with dust metallurgy. 20 min mixed powder in the turbo-type moisture is pressed and raw samples are produced using three different (300 MPa, 500 MPa and 700 MPa) pressing pressure. The raw samples produced are synthesized in the atmosphere of argon gas, at a temperature of 1200 °C for 30 minutes. Produced samples are characterized by micro-structure examinations, hardness and intensity measurements. Pre- and post-sintering intensity measurements have been made and the portionability rate has been determined. Switching tests are used in the standard pin on disk switching type test device with 3 different switches (1000 m, 2000 m and 3000 m) under 50 N load. In the results obtained, the increased pressure and intensity increased and the percentage of portion decreased. The highest weight loss is achieved in the 500 MPa pressure-pressed alloy, while the lowest weight loss is achieved in the 700 MPa pressure-pressed alloy.
In this study, was investigated the wear behavior of alloys with Fe - 3%Si - 2%Ni -% 0.35 Gr composition produced by different pressing pressures with powder metallurgy. The powders were mixed for 20 minutes in the turbine type mill, green compacts were produced that pressed using three different pressing pressures (300 MPa, 500 MPa and 700 MPa). The produced green compacts were sintered in argon gas atmosphere, at 1200 °C temperature for 30 min. The produced samples were characterized by microstructure analysis, hardness and density measurements. The density measurements were made before and after sintering and the porosity rate was determined. The wear tests were made on the standard pin-on-disc wear machine, at 3 different (1000 m, 2000 m and 3000 m) sliding distances and under 50 N load. In the results, it was observed that the porosity decreases and the density increased with the increasing pressing pressure. As a result of the wear tests, the highest weight loss was obtained in the pressed alloy with 500 MPa pressure, while the lowest weight loss was obtained in the pressed alloy with 700 MPa pressure.
Alan : Fen Bilimleri ve Matematik; Mühendislik
Dergi Türü : Ulusal
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