http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
윤동석,신경환 대한금속재료학회(대한금속학회) 1981 대한금속·재료학회지 Vol.19 No.8
The majority of early ironmaking sites in Korea were situated in the valleys of large rivers near rich iron ore deposits. This study examines, for the first time, the metallurgical characteristics of early iron age artifacts excavated from one of the two major river basins in the Republic of Korea. Chemical analysis and metallographic examination have been carried out on both these artifacts and their related ironmaking residues. From these studies, the technological development of this area at that time has been assessed. It has been shown that, 1) Ironmaking originated in this area in the second or third century B.C. 2) White cast irons were produced from molten metal by high temperature reduction. 3) Steels were produced from sponge iron(Low temperature reduction) by puddling (i.e. repeat forging operations) to eliminate slag. 4) Internal carburization of the low carbon steel produced from sponge iron may have been obtained by multiple piling and forging operations.
함티탄자철광석의 염화반응 속도에 관한 연구 : 중고온도에서의 철의 선택염화속도에 관하여
윤동석,백영현 대한금속재료학회(대한금속학회) 1977 대한금속·재료학회지 Vol.15 No.3
함티탄자철광석의 염화반응 특성은 구성광물인 자철광과 티탄철광의 그것과 관련지어 연구되었다. 염화반응 속도는 300-800℃은 온도 범위에서 batch-boat-weighing technique에 의하여 측정되었다. 함티탄자철광석의 염화반응은 초기에 자철광의 염화에 의하여 주도되며 후기에는 티탄철광의 염화반응에 의하여 특성 지워진다. 티탄철광의 염화탈철 반응도 역시 두단계로 구분된다. 즉 FeO의 초기 염화와 Fe₂O₃ 후기염화, 실험결과들은 반응기구 및 속도론적 관점에서 논의되었다. Chlorination of titaniferous magnetite was investigated by means of batch-boat-weighing technique at elevated temperatures. The chlorination of titaniferous magnetite was characterized by the chlorination of magnetite at the initial stage of reaction, followed by that of ilmenite. It is also interesting to note that the chlorination of ilmenite was affected by two-step process: chlorination of ferrous oxide at the initial stage of reaction, followed by that of ferric oxide. Results were interpreted in terms of rate equations as well as chlorination mechanisms.
함티탄자철광의 염화반응성에 관한 연구 : 티탄철광석의 선택염화속도에 관하여 Selective Chlorination Rate of Ilmenite
윤동석,백영현 대한금속재료학회(대한금속학회) 1976 대한금속·재료학회지 Vol.14 No.1
티탄鐵鑛石, 磁鐵鑛石 및 含티탄磁鐵鑛石들에 對한 鹽化反應性들이 TGA 方法에 依하여 調査되었다. 磁鐵鑛石과 合티탄磁鐵鑛石은 쉽게 鹽化되는 반면에 티탄 鐵鑛石의 鹽化는 比較的 어려웠다. 選擇鹽化에 依한 티탄鐵鑛石 中의 鐵分의 除去는 炭素, 鹽素가스의 流速, 時間 및 溫度變化에 따라 測定되었으며 이 結果들로부터 鹽化反應의 機構가 論議되었다. Chlorination behaviours of ilmenite, magnetite, and titaniferous magnetite were investigated by means of a thermogravimetric analysis. Magnetite and titaniferous magnetite could be chlorinated readily, while ilmenite was rather difficult. The preferential removal of the iron from ilmenite by selective chlorination was extensively studied by measuring effects of carbon, chlorine flow rate, time, and temperature. Rate equation correlating the results as well as chlorination mechanism was also discussed.