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RISS 인기검색어
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- 저자 : 심창영(C. Y. Sim) (검색결과 2 건)
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주원경(W. K. Joo),왕일기(Y. Q. Wang),양현태(H. T. Yang),심창영(C. Y. Sim),송정일(J. I. Song) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
The microstructures and mechanical properties of OFHC copper/STKM 11A for D-tube joints brazed using BAg filler metal at 870℃ for 20 minutes in NH₃ atmospheres were performed. Interfacial microstructures were observed in reaction layer. A brazing strength causes of decline with defects of pin hole and base metal by lack of penetration. In tensile test, the properties of joints clearance of 0.01㎜ are better than other joints clearance that has yield strength of elasticity area with the brazing length of 2.5㎜, and also suitable for the case of brazing length of 5.0mm. According to the results of FEA (finite element analysis) on the tensile test, the maximum stress and strain were generated apart from the interface in large deformation. Diffused layer was formed by counter diffusion action of base metal and filler metal layer, and crack between two base metals was not discovered. This is the main reason that fracture of test piece does not appear in copper base metal, and brazing department forms good junctures.
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다구찌 방법을 이용한 유분리기의 브레이징 최적 공정 해석
주원경(W. K. Joo),왕일기(Y. Q. Wang),양현태(H. T. Yang),심창영(C. Y. Sim),송정일(J. I. Song) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.11
The purpose of this study is to find the optimization processing on Oil-separator brazing using Taguchi method which was generally used to analyze the effects of various control factors. Mini-Tab is a good for program that is making a selection using Taguchi method. The microstructures and mechanical properties of OFHC copper/STKM 11 A for Oil-separator joints brazed using BAg and BCuP filler metal in NH₃ atmospheres were performed. Interfacial microstructures were observed in reaction layer. First, We selected proper filler metal for Oil-separator brazing through the observation of SEM micrographs and tensile test. A brazing strength causes of decline with defects of pin hole and base metal by lack of penetration. In tensile test, the properties of BCuP are better than other filler metal that has yield strength of elasticity area But it have so many defects. Second, using seleted filler metal, We applied Diffused Taguchi method by Mini-Tab. Finally, selected conditions improved more 12% for brazing strength than current processing on Oil-separator.
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