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Gas 이송용 Utility Materials의 전해연마 특성에 관한 연구
안세원,이종형,박무수,An, Se-Won,Lee, Jong-Hyung,Park, Moo-Soo 한국기계가공학회 2004 한국기계가공학회지 Vol.3 No.3
Many kinds of gases, such as erosion gas, dilution gas, and toxic gas have been used in manufacturing process of LCD at semiconductor. In order to increase accumulation rate of manufacturing process, high degree of purity in these gases and minimized metalllic dust are required. All wetted stainless steel surface must be 316L electro-polished with $0254{\mu}m$ in average. Based on the AES analysis, Cr/Fe 11 and $Cr_2O_3$ thickness $25{\AA}$ are measured Molybdenum and silicon contaminants which is characteristic of stainless steel and oxygen were found on the surface.
정형식 ( Hyung-sik Jeong ),안세원 ( Se-won An ),이종형 ( Jong-hyung Lee ),최성대 ( Seong-dae Choi ) 한국산업융합학회 2006 한국산업융합학회 논문집 Vol.9 No.1
The study is diagnosis about fatigue failure phenomenon of heating coil spring (sup9) and heat treatment method that is used to crusher. Because more than 80~90% of damage announcement of breakdown of machine and construction is been caused in fatigue present state, fatigue failure became important leading person at design. Calculated design load is imposed repeatedly that fatigue breakdown is safe. Is phenomenon that change load is imposed in the construction continuously. Used coil spring applies heat 30minute by Quenching temperature 86 0℃ if see manufacturing process and temperature of gasoline of 50℃ keep after quench that know tempering a 460℃ 90minute a product be. If doto apply heat 950℃ material at rolling process historically before quenching, austenite formation clay pipe being done AGS(Austenite Grain Size) by 2.5~4 become. Apply heat quenching 30minute by 820℃ by improvement method and after quench that keep 50℃ in oil tempering if do 450℃, 90minute spring ideal formation sorbite formation of the river form and condition that satisfy most more than AGS 7 appeared. Also, we can secure authoritativeness through MT since shot peening processing.
이종형(Jong-Hyung Lee),송득중(Deuk-Jung Song),이상영(Sang-Young Lee),안세원(Se-Won An) 한국산업융합학회 2004 한국산업융합학회 논문집 Vol.7 No.4
There have been numberous structure-related accidents including structural destruction from past to the present. This experiment used a beachmark technique that does not exceed the maximum stress and reduce the range of amplitude(or alternating stress).Difference in stress on the actual section affects the progress of crack.<br/> <br/>
이종형(Jong-Hyung Lee),이현환(Hyun-Whan Lee),안세원(Se-Won An),박신규(Shin-Kyu Park) 한국산업융합학회 2004 한국산업융합학회 논문집 Vol.7 No.2
According to the development of the aircraft industry, the fatigue strength of Aluminum Alloy becomes a great important material, but it seems that we don't understand an effect on the crack growth behaviour very well. This thesis is not only studied about the five kinds of 2017-T3, 2023-T3, 5083-0, 7075-T6, 7NOI-T6 among the Aluminum Alloy which are the main materials of the aircraft, but also small or large relations against the fatigue strength of them. The consequence of the research was being progressed the accordance with the order. That is, The order is 2024-T3> 2017-T3> 7N01-T6> 7075-T6> 5083-0. These inclusion came out the acceleration phenomena in the crack growth behaviour among the high △K section Nevertheless I figured out their effects were being ignored at the 2b step.