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은-동계의 전기접점재료의 조직특성이 접점사용특성에 미치는 영향
문인형,정명상,김영입 대한금속재료학회(대한금속학회) 1981 대한금속·재료학회지 Vol.19 No.9
The relationship between the microstructures and some their related material properties was investigated in order to design the best suitable microstructure of the Ag-Cu electrical contact alloy. The Ag-Cu eutectic alloy was unidirectionally solidified in order to obtain an anisotropic microstructure. Some part of such unidirectionally solidified eutectic alloy has undergone also the rolling deformation to get the more elongated microstructure, characterizing the more anisotropic microstructural features. The specimen of a unidirectionally solidified eutectic structure has shown the better properties in regard to its application on electrical contact than the others. Furthermore its properties relevant to the contact performance was able to be improved by an appropriate rolling deformation. The specimen of the narrower lamellar spacing obtained by rolling deformation in direction to unidirectional solidification has shonw the best properties among the various types of the specimens investigated in this study. Possible explanation on the experimental result was also carried out.
소결 T1 재종 고속도공구강조직에 미치는 여분 탄소첨가의 영향
문인형,오중석,김영입 대한금속재료학회(대한금속학회) 1983 대한금속·재료학회지 Vol.21 No.9
The effect of carbon additive on the sinterability and the micro-structure of P/M-T1 grade high speed steel was investigated. The additional carbon added to the nominal composition of T1 grade high speed steel was very useful for adjustment of carbon content as well as for achievement of full densification, so far as this steel should be produced by conventional P/M technique. The optimal sintering condition was related closely with the excess carbon content. In the present work, the optimal condition was proved that the sintering temperature was 1310℃ for the specimen with 0.3w/o excess carbon.