http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박육 스테인리스 주강에 대한 유동 및 응고해석의 실험적 고찰
배차헌,정해용,최학규,박홍일,최병강 한국주조공학회 2000 한국주조공학회지 Vol.20 No.5
In order to find out the casting conditions of the thin wall stainless steel exhaust manifold for automobile, the melt flow and solidification behavior simulated by the Z-CAST program were evaluated, and experimental casting result on the test casting and exhaust manifold of SSC13 alloy were investigated. From the results of this study, it was shown that the calculated results on fluid flow were in good agreement with practical thin wall test castings under the same casting conditions, as pouring metal is austenitic stainless steel(SSC13) and pouring temperature is 1575, 1630, and 1665℃ respectively. That calculated result with designed thin wall exhaust manifold was predicted filling up into the mold cavity, and practical casting was sound. The solidification simulation was predicted shrinkages at the bosses for original exhaust manifold, and designed it without bosses was predicted no defect. Therefore practical exhaust manifold casting was sound and in good agreement with calculated solidification results.
원심분사주조법에 의한 Cu-X(=Al2O3 , W)p 복합재료의 미세조직 및 복합화
배차헌,정해용 ( Cha Hurn Bae,Gae Yong Jeong ) 한국주조공학회 1997 한국주조공학회지 Vol.17 No.5
N/A Particle reinforced metal matrix composites(MMCs) via a centrifugal spray-cast deposition(CSD) process were fabricated by injecting second phase particles(Al₂O₃<40 )㎛, W<17.3 ㎛) into copper melt on the atomizing disc. Compositing modes were investigated by combining microstructures and mathematical modeling between Cu droplets and the reinforced particles injected. The Cu/W_P powders were shown that the W particles penetrate and get embedded in the Cu droplets. It is considered that the W particles composite preferentially in Cu melt on the atomizing disc. On the other hand, the Al₂O, particles did not penetrate into the Cu droplets on the atomizing disc but get attached in surface of Cu droplets during the flight. It is considered that the compositing may be attained in the flight distance which the relative velocity between Cu droplet and Al₂O, particle is maximum. The microstructure of the Cu/W_P and the Cu/(Al₂O,)_P composite preform was strongly influenced by compositing modes of droplets, and after subsequent deposition it was comprised as it is called the dispersed type and the cell type of microstructure,respectively. (Received July 24, 1997)