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송재형(Jae-Hyung Song) 산업기술교육훈련학회 2012 산업기술연구논문지 (JITR) Vol.17 No.4
This research discusses the pin-on-disk test and the hardness test against the Fe-base low alloy powder sinter to automotive transmission materials must provide high and stable friction, low noise and vibration, and high wear resistance, under various conditions such as temperature, vehicle speed and pressure. To satisfy the above requirements, several different material ingredients are usually combined to form complex friction materials. find out the friction and wear characteristics, and the investigation on automotive transmission to establish the theoretical friction and wear characteristics. It was observed almost pearlite and Ni particle in sintered specimen and porosity which was characteristic of sintered alloy. Surface of the carburization specimen was mostly martensite that was included micro porosity. Tensile strength of sinter and carburization specimen was observed 592.5 MPa and 1173 MPa. In the case of impact energy was showed 28.4J and 17.7J respectively. Average friction coefficient of sintered was reduced largely compare with carburization specimen. Wear depth of sintered specimen was increased with load increment, but an amount of increment was trifled in the case of carburization. It was expected that was possible to improve friction and wear characteristics largely. Because of very micro porosity by making powder form delayed oil long time in lubrication condition.
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변상용(SANG-YONG BYUN),송재형(JAE-HYUNG SONG),이경환(KYUNG-WRAN LEE) 한국정보과학회 1987 한국정보과학회 학술발표논문집 Vol.14 No.1
본 논문은 시스템의 요구를 분석하는데 있어서, 구조화 분석의 도구인 자료흐름도 자료사전 등을 컴퓨터와 대화를 통하여 사용할 수 있도록 한다. 구현언어는 한글과 그래픽 기능을 이용할 수 있는 베이직 언어를 사용하며, 사용자의 정의에 따라서 자료흐름도를 그리도록 하며, 완전성과 일치성에 대하여 검토하도록 한다. 최종적으로는, 정의된 프로세스와 자료사전을 보고서로 작성하도록 한다.
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