http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Al 탈산강의 Ca 첨가에 의한 비금속개재물의 형태제어
이원재,김경식,심재동,윤종규 대한금속재료학회(대한금속학회) 1983 대한금속·재료학회지 Vol.21 No.6
In order to clarify the shape control mechanism of nonmetallic inclusions in molten steel, the morphology changes of oxide and sulfide inclusions were investigated by Ca treatment in Al-deoxidized steel at 1600℃. The Ca addition of suitableamount into Al-deoxidized steel considerably improved the degree of steel cleanliness because the alumina cluster formed after Al-deoxidization changed to liquid phase calcium-aluminates which float out rapidly from steel bath. And also, when total oxygen content in molten steel was less than about 20ppm, MnS sulfide and Al₂O₃oxide were modified to C type inclusions such as (Ca, Al, Mn) O-(Ca, Mn) S or CaO-Al₂O₃-CaS
이원재,김석일 한국정밀공학회 2009 International Journal of Precision Engineering and Vol.10 No.5
In this study, to more quantitatively evaluate the structural characteristics of an ultra-precision machine for machining large-surface micro-features, the joint stiffnesses of hydrostatic guideways and bearings were identified based on a virtual prototype and compliances of the ultra-precision machine. The virtual prototype of the ultraprecision machine was constructed to include the joint stiffnesses to be identified, and the joint stiffnesses were identified through an optimization problem in order to minimize the error between the compliances measured from the physical prototype and the compliances predicted from the virtual prototype. In particular, the validity of the identified joint stiffnesses was verified by the fact that the loop stiffnesses of the ultra-precision machine predicted from the virtual prototype and the identified joint stiffnesses coincided well with those measured from the physical prototype.