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EV 브레이크 경량화를 위한 하드아노다이징 부의 성능 평가
박창선(C. S. Park),성백섭(B. S. Sung),차용훈(Y. H. Cha),김재열(J. Y. Kim),이재희(J. H. Lee),박용순(Y. S. Park),강대진(D. J. Kang) 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.1
This study evaluates the strength of surface treatment parts using the hard anodizing method to the aluminum alloy brake disks. In order to achieve weight reduction of vehicles, Eco-friendly cars parts of the high-quality and competitive price is to equip. Especially while pursuing parts of weight reduction, it has to maintain the strength of the surface of the brake by nature. To enhance surface strength of aluminum alloy, we use hard anodizing technology in the surface treatment. This study is resulted of 3 times greater the hardness value of the hard anodized specimen than the aluminum alloy specimen for the lightweight parts of EV brake disk
PC의 흡기 팬과 배기 팬의 위치가 CPU의 냉각 성능에 미치는 영향에 대한 실험 및 수치해석
양소라(S.R. Yang),김경모(K.M. Kim),유계룡(G.R. You),신동열(D.Y. Shin),장성일(S.I. Jang),박창선(C.S. Park),최형권(H.G. Choi) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
In this paper, the effect of the configuration of intake/exhaust fans on the cooling performance of CPU was investigated both numerically and experimentally. In the experiment, the temperatures of CPU and exhaust air were measured for various fan-configurations in order to find an optimal fan-configuration when the wall of PC case was in an adiabatic condition and CPU was cooled down by a fan with heat-sink. In the numerical simulations, steady conjugate heat transfer problems, where CPU with heat source is cooled down by both conduction and convection, were solved using a commercial code. The results of simulations qualitatively agreed with those of experiment in terms of cooling performance of CPU and the temperature and velocity fields obtained from simulations with four configurations were discussed.
염소공법을 위한 Ilmenite 와 Ti 슬랙 불순물의 예비환원
조환종,박창선,반봉찬 대한금속재료학회(대한금속학회) 1989 대한금속·재료학회지 Vol.27 No.6
Behavior of the reduction of iron oxide in ilmenite and titanium slags by various solid carbons was investigated in the temperature range of 1000℃ l150℃. A laboratory scale rotary kiln for the prereduction was employed to study the effects of reduction time and temperature, using various carbons as reducing agents of the prereduction process. Maximum metallization (95%) of FeO in ilmenite was achieved at about 1100℃. The reduction process of ilmenite including newly confirmed phase (pseudorutile) could be expressed in four elementary reduction stages, and also the phase transformation of ilmenite and titanium slags during the reduction process was investigated with the aid of X-ray diffraction analysis and electronmicroscopy.