http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김현승(H. S. Kim),이준상(J. S. Lee),조동현(D. H. Cho),강성웅(S. W. Kang),나태엽(T. Y. Na),장호(H. Jang) 한국트라이볼로지학회 2014 한국윤활학회지(윤활학회지) Vol.30 No.1
The temperature-dependent tribological properties of brake discs for a train were examined in this study. The discs were produced using heat-resistant alloy steel, which showed different thermal conductivity after the heat treatments. A commercial brake friction material was used to evaluate the friction effectiveness, and the friction tests were carried out using a 1/5 scale dynamometer under various initial braking temperature conditions. The results showed that the tribological property of the disc was strongly affected by the heat treatment schedule. At low temperatures (below 250℃), the friction coefficient increased as a function of disc temperature, indicating that frictional heat increased the adhesion between the disc and pad. In addition, fade was observed at high temperatures (above 250℃); it was pronounced in the case of the disc with low thermal conductivity. The different fade resistances observed in the discs with different heat treatment schedules appear to be influenced by microstructural changes such as carbide redistribution occurring during the heat treatments, which affected the thermal conductivity.
정근중(Geunjoong Jeong),권창안(Changan Kwon),송현우(Hyunwoo Song),최희범(Heebum Choi),김향래(Hyangrae Kim),운동주(Dong-Joo Yoon) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The purpose of this paper is to study the effect of heat treatment conditions of discs on the friction characteristics in the disc brake system. Test pieces are manufactured to apply different heat treatment conditions. It is observed physical properties and friction performance as thermal conductivity, hardness, tensile strength, coefficient of friction, fade, wear etc. The thermal conductivity of the unheat-treated disc is higher than that of heat-treated discs. In fade, the coefficient of friction of the unheat-treated disc is higher than that of heat-treated discs because of lower braking temperature.
티탄산칼륨 Morphology에 따른 마찰재 제동 특성 연구
정근중(Geunjoong Jeong),권창안(Changan Kwon),송현우(Hyunwoo Song),최희범(Heebum Choi),김향래(Hyangrae Kim),허명준(Myeong-jun Heo),정진오(Chung Jin-Oh) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
the purpose of this paper is to study the effect of morphology of potassium titanates on the friction characteristics in the NAO(Non Asbestos Organic) brake pad. 3 potassium titanates are selected and test pieces are manufactured by hot press forming. It is observed physical properties and friction performance as density, hardness, average coefficient of friction, fade, wear etc. In fade, the coefficient of friction of non fiberous potassium titanates is more stable than that of fiberous potassium titanate. In wear and disc roughness, fiberous potassium titanate is better than non fiberous potassium titanates.
물질-장 모델 분석을 이용한 카본 세라믹 복합재의 체결 구조 개발 및 마찰/마모 특성 제어에 관한 연구
심재훈(Jaehun Shim),전갑배(Gabbae Jeon),심상현(Sanghyun Shim),김윤철(Yooncheol Kim),임동원(DongWon Im),현은재(Eunjae Hyun),정광기(KwangKi Jung),김기정(Kijeong Kim),김홍기(Hongki Kim) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5
Needs of high performance brake system have strongly required for a long time because of increase of engine power and customer’s favorites etc. To solve these problems, a novel brake system was proposed using carbon ceramic composite. Also, a novel coupling structure between carbon ceramic composite and HAT was proposed using the substance-field model analysis and pugh matrix. The superiorities of developed brake system were verified via SiC, Si, C control, endurance, friction and fade analysis.
정근중(Geunjoong Jeong),권창안(Changan Kwon),송현우(Hyunwoo Song),김향래(Hyangrae Kim),최재희(Jae-Hee Choi),최광표(Gwang-Pyo, Chio),성경필(Kyung-Pil, Seong) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
NAO(Non Asbestos Organics) friction materials were investigated to study the role of metal sulfide lubricants on the friction performance. Four different metal sulfide lubricants including SbS₂, MoS₂, FeS and SnS were employed in this investigation. The tribological properties of friction materials like coefficient of friction, braking temperature, noise and wear were evaluated on a scale tester. In effectiveness, S4(SnS) shows better performance in low speed and S1(Sb₂S₃) shows good performance in high speed . S2(MoS2) and S3(FeS) show good noise property.
정근중(Geunjoong Jeong),권창안(Changan Kwon),송현우(Hyunwoo Song),김향래(Hyangrae Kim),최희범(Heebum Choi),윤동주(DongJood Yoon) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
The purpose of this paper is to study the effect of heat treatment conditions of discs on braking performance of brake pad. The test discs are manufactured to apply different heat treatment conditions. And friction materials for racing (Semi-Metallic type) are used as a counter material. It is observed physical properties and friction performance as thermal conductivity, hardness, tensile strength, coefficient of friction, fade, wear etc. The experimental results shown that coefficient of friction of the heat-treated discs are higher than the unheat-treated disc.
Graphite Paticle Size에 따른 고온영역에서의 윤활 및 마찰 특성
김향래(Hyangrae Kim),최희범(Heebum Choi),허명준(Myungjun Heo),선신규(Shinkyu Sun),김성민(Seongmin Kim) 한국트라이볼로지학회 2009 한국트라이볼로지학회 학술대회 Vol.2009 No.11
The purpose of this paper is to study the effect of particle size of the graphites on the friction characteristics in brake pads. Test pieces are manufactured in organic pads by the hot press method and observed the high temperature performance by the scale tester. COF of T2 is higher than that of others and Braking temperature of T2 is lower. In disc roughness, T4 is lower than that of others.