http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Type 316LN 스테인리스강의 절삭특성과 가공 변질층
오선세,이원,Oh, Sun-Sae,Yi, Won 대한기계학회 2004 大韓機械學會論文集A Vol.28 No.2
The cutting characteristics and the deformed layer of nitrogen(N)-added type 316LN stainless steel were comparatively investigated to type 316L stainless steel. The cutting force, the surface roughness(Ra) and the tool wear in face milling works were measured with cutting conditions, and the deformed layers were obtained from micro-hardness testing method. The cutting resistance of type 316LN was similar to type 316L in spite of its high strength. The surface roughness of type 316LN was superior to type 316L for all the cutting conditions. In particular, in the high cutting speed above 345m/min, the surface roughness of the two stainless steels was closely same. The deformed layer thickness of the two stainless steels was generated in the 150$\mu\textrm{m}$-300$\mu\textrm{m}$ ranges, and its value of type 316LN was lower than that of type 316L. This is due to the high strength properties by nitrogen effect. It was found that type 316LN was higher in the tool wear than that type 316L, and flank wear was dominant to crater wear. In face milling works of type 316LN steel, tool wear is regarded as a important problem.
자동차 경량화에 따른 이종재료 접착접합 이음에 대한 평가
윤송남(SongNam Yun),오승규(SeungKyu Oh),한준영(Jungyoung Han),오선세(Sunse Oh),장철섭(ChulSup Jang),이원(Won Yi) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In automobile industry, it is necessary to reduce the weight from the view point of energy and environmental problems in these days. One of the ways for weight reduction is the use of the adhesive aluminum structure. In this study we investigate that the ultrasonic signals transmitted through adhesive bonded joint plates is used to evaluate parameters related to attenuation and frequency in the adhesive bonded joint. An FFT is developed to determine bond-layer parameters such as effective thickness and frequency for adhesive bonded joint Al 6061 plates in comparison with measured and theoretical ratios. And the parameters of ultrasonic wave and the J-integral investigate the adhesive bonded joint strength by DCB specimens.<br/> <br/>