무급유 베어링 최적 소결조건 도출을 위한 첨가제에 따른 겉보기 기공률 특성 평가 An Evaluation of Apparent Porosity Based on the Filler to Detect Optimum Sintering Conditions of Oilless Bearing
한국기계기술학회지
(韓國機械技術學會誌)
제19권 제5호
(2017.10)
pp.759-763
pp.759-763
한국기계기술학회
(Korean Society of Mechanical Technology)
초록
The object of this paper is to examine the optimum sintering condition which have excellent mechanical properties compared to the conventional oilless bearing. It is shown that the sintering rate is the most excellent at 850°C, especially KAB-23, KAB-23G, PBF-8 specimens. With increasing the nitrogen injection rate, the apparent porosity increased gradually. In contrast, with increasing the hydrogen injection rate, the apparent porosity decreased gradually. It is shown that the apparent porosity is very useful in the range of nitrogen injection rate 2Nm 3 and hydrogen injection rate 10Nm 3 .
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