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Pin-on-Disc식 미끄럼마모시험 시 마모 거동에 미치는 접촉면적 및 하중 조합의 영향
이한영(Lee, Han-Young) 한국트라이볼로지학회 2013 한국트라이볼로지학회지 (Tribol. Lubr.) Vol.29 No.2
The effects of contact pressure on the sliding wear behavior of mild steel in a pin-on-disc type apparatus were investigated. Sliding wear tests were conducted with various combinations of the load and apparent area of contact. The wear behavior of mild steel as a function of sliding speed was independent of contact pressure. However, the wear rate at different sliding speeds was influenced by the load regardless of the apparent area of contact. This was attributed to the fact that there may be no difference in the real area of contact for any combination of the load and apparent area of contact.
송준혁(Joon Hyuk Song),양성모(Sung Mo Yang),김은성(Eun Sung Kim),김경재(Kyung-Jae Kim),오제하(Je-Ha Oh),강신재(Shin Jae Kang) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
Automotive engine has been improved with the requirements of customer for high speed, high torque, and horse power. These high performances of engine will create heat on the friction surface of synchronizer ring, and the temperature will rise to the limit, and because of this, the wear of synchronizer ring surface will rapidly increase by burn sticking. To solve this, it is studied the sintering process for friction materials. Sintering process is useful in the vehicle powertrain engineering with virtues of the net-shaping of complex component and high wear resistance at excessive friction temperature. This paper introduces an improved friction performance of Synchronizer system for high speed, high torque, and high horse power of automotive diesel engine. Copper based friction material is sintered to improve the friction performance and wear resistance. The friction coefficients and wear-weight were measured by Pin on disc Wear and friction test. And synchronizer rings were developed with diffusing ‘sintered friction material’ on the Fe-based mesh ring. Developed synchronizer ring were good to friction performance from the transmission dynamo.