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Cu 와 P 를 첨가한 주철분말의 액상소결에 관한 연구
김형수,김철범,나형용 대한금속재료학회(대한금속학회) 1992 대한금속·재료학회지 Vol.30 No.10
Liquid phase sintering of cast iron powder compacts added 0-5% Cu, or the same contents Cu and 0.4% phosphor, at 1100℃ or 1120℃ in H_2 atmosphere was studied. In the case of copper addition, the maximum sintered density of 6.3g/㎤ and the maximum tensile strength of 300㎫ were obtained at 2% copper. On the contrary, in the case of both copper and phosphor addition, the sintered density decreased with increasing copper content because of compacts swelling in pressing direction. This phenomenon might be due to the bad wettability of P-containing liquid phase on the surface of cast iron powder.
주철분말의 소결성에 (燒結性) 미치는 산화철 (酸化鐵) 첨가의 효과
김형수,김철범,나형용 ( Hyung Soo Kim,Chul Bohm Kim,Hyung Young Ra ) 한국주조공학회 1990 한국주조공학회지 Vol.10 No.1
N/A In order to lower the cabon content of sintered products below the solubility of austenite, Fe-oxide was added to cast iron powder of which matrix was pearlite. And the effects of it on some sintering properties and mechanical properties were investigated. Roughly speaking, the linear shrinkage, density, and tensile strendth of sintered properties increased as the sintering temperature became higher, the size distribution of powder became finer, and the amount of Fe-oxide added became less. The maximum tensile strength of sintered products was 78㎏f/㎟ more or less, of which carbon content was 1.4% and sintering temperature was 1180℃.
주철분말의 소결조직에 (燒結組織) 미치는 산화철 (酸化鐵) 첨가의 효과
김형수,김철범,나형용 ( Hyung Soo Kim,Chul Bohm Kim,Hyung Yong Ra ) 한국주조공학회 1990 한국주조공학회지 Vol.10 No.2
N/A The microstructures of sintered products of Fe₂O₃or Fe₃O₄-Oxide added cast iron powder was investigated. And the effects of particle size distribution was investigated too. As the result, the structures of sintered products did not related to the species of Fe-Oxide. Th porosity of sintered products was decreased in size and spherodized with increasing sintering temperature, decreasing Fe-Oxide quantity. Fe-Oxide itself did not hinder sintering of cast iron powder particularly, therefore sintering could be occurred without termination of reduction of it. And the sintered products of finer particle size distribution had finer and more spherodized porosity, and had minimized the deviation of size and shape of porosity.