http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
선택적 레이저 용융 공정시 공정 변수가 적층형상에 미치는 영향
성민영(M. Y. Sung),주병돈(B. D. Joo),김은화(E. H. Kim),김수희(S. H. Kim),문영훈(Y. H. Moon) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
Selective laser melting (SLM) is a fast growing process of rapid production for metallic based parts. The influence of processing variables such as powder, laser output power, and scan rate on the densification. Therefore a study on fabrication Fe-Cr-Ni powder by selective laser melting has been performed. In this study, the effect of the process parameters on shape of the fabricated part in the selective laser melting process is investigated by analysis of variance such as the height, depth of the fabricated part. With energy density decrease, the height and depth were decreased. Although the conditions are of the same energy density, the shape is different by laser power and scan rate. The shapes according to laser parameters were divided into 3 groups. And the Type Ⅱ is obtained under the conditions as 50㎛ of spread powder height, more than 15㎛ of pulse width.
SLS 공정을 이용한 Fe-Cr 분말의 적층에 관한 연구
손영명(Y. M. Son),장정환(J. J. Janag),주병돈(B. D. Joo),성민영(M. Y. Sung),문영훈(Y. H. Moon) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5
Selective laser sintering (SLS) is a fast growing process of rapid production for metallic based parts. To restore damaged mold surface using SLS, single layer experiments of 20 μm Fe-Cr Powder Provided feasible process parameters for the smooth regular surface. To estimate coherence between melted powder and basematal, tendency of hardness distribution has been observed. Hardness of melted zone and remelted zone was diversified from 5GPa to 6.5GPa. It is over 2 times compared of hardness of basemetal. Average surface roughness of each direction on surface of melted powder was measured. Experimental results show that the mold restoring process using SLS can be sucessfully applied in the mold repair industry.