http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 김석원(S. W. Kim) (검색결과 62 건)
- 무료
- 기관 내 무료
- 유료
-
-
-
-
-
-
김석원(S. W. Kim),김상기(S. K. Kim),정우섭(W. S. Jung),이채문(C. M. Lee),이득우(D. W. Lee) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
In recent years, a demand for micro-structure machining is increasing by the development of information and optics industries. Micro machining technology is in general well known in the field of lithograghy. However, the requirement of producing micro machine and/or micro mechanism with metal materials will be increased since a variety of workpiece configurations can be easily made. In this paper, ultra precision machine is developed to obtain micro groove and mirror surface using single crystal diamond tool. According to the cutting experiment, no burr was found at the edge of V-grooves, and the surface roughness of copper is about 1~3㎚ Ra. It is verified that ultra precision machine is effective to high precision machining.
-
-
-
김완두(W. D. Kim),우창수(C. S. Woo),이학주(H. J. Lee),정승일(S. I. Jung),김석원(S. W. Kim),김영구(Y. K. Kim),최경진(K. J. Choi),이동형(D. H. Lee) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
An air spring was accepted for rail vehicle secondary suspension to reduce and absorb the vibration and the noise. The air spring for the electric railway was developed with domestic technology, which consisted of a cord reinforced rubber bellows, a upper plate, a lower plate and a stopper rubber spring. The fatigue test was conducted in laboratory by using servo hydraulic fatigue testing system to verify the durability. And to guarantee the adaptation of this air spring, the ride comfort and the air pressure variation were measured in train test on Boondang line.
-
자동차 부품용 내열, 고온 내산화성 고Si 구상흑연주철의 제조기술개발
김석원(S. W. Kim),우기도(K. D. Woo),한상원(S. W. Han),김정규(J. K. Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
The study aims to compare the characteristics of high temperature oxidation in various High Si Ductile Cast Iron (HSOCI) in order to improve the material for exhaust manifolds which require stronger heat resistance. The specimens containing 2~6% Si and 0~4%Mo were heated in 650℃~950℃ for 100hrs, and 650℃ for 5~20 day. Consequently, amount of oxidation were decreased<br/> with increase of Si, Mo, due to the formation of Fe₂SiO₄and Mo carbide. As the amount of Si and Mo increase, hardness is increased but charpy impact energy in deceased. This is because that the Si solution and Mo carbide in matrix increase with increase of Si, Mo. As a result of addition of various alloy elements in the cast iron which contained 3.5%C, anti-oxidation property is improved, but toughness is decreased with increase of Si, Mo
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
