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題名 | 空氣﹣丙烷混合氣體在流體床中對鋼料的高溫物理化學反應= |
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作者 | 陳永傳; 宋隆正; 黃振賢; |
期刊 | 材料科學 |
出版日期 | 19910600 |
卷期 | 23:2 1991.06[民80.06] |
頁次 | 頁203-216 |
分類號 | 472.3 |
語文 | chi |
關鍵詞 | 化學; 反應; 丙烷; 物理; 空氣; 流體床; 氣體; 高溫; 混合; 鋼料; |
中文摘要 | 為了發展鋼料在流體床中的熱處理技術,本研究以空氣及丙烷配製控制 爐氣,並在流體床中加熱鋼料,由加熱後鋼料的表面狀況、重量變化、含碳量、 顯微組織等探討爐氣的配製條件及流體化參數對爐氣與鋼料間作用性的影響,所 得結果如下; 由空氣及丙烷所配製的爐氣在流體床中對鋼料的滲碳能力隨著丙烷的比率、流體 化程度、反應區的長度之增加而增加。鋼料在流體床中央的滲碳速率比在流體床 邊緣的滲碳速率快,但在兩處滲碳所得的平衡含碳量大致相同。流體化介質的顆 粒適當大小(本實驗的結果為平均直徑97.3μm)時,爐氣對鋼料的滲碳速率最 快。在流體床中以空氣-丙烷混合氣體實施鋼料滲碳,所得滲碳效果與傳統吸熱 型爐氣相當,但可省去氣體轉化爐的設備。 |
英文摘要 | In order to develop the heat treatment technique in fluidized beds, steel samples were heated ina fluidized bed furnace under the atmosphere of air and propane mixtures. The reactions between theatmosphere and steel were investigated through studying the surface condition, weight change, carboncontent and microstructure of these carburized steels. The results are as follows: The carburizing ability of the atmosphere made from air and propane in a fluidized bed increaseswith increasing fraction of propane, the degree of fluidization and the length of reaction zone in afluidized bed. The carburizing rate in the middle of a fluidized bed is higher than that near the marginof the bed; however, the equilibrium carbon content of steels which were carburized at either locationis nearly identical. There exists an optimum size for the fluidized medium, which is 97.3 μm in this research,so that the carburizing rate reaches its maximum value. The result of carburization performed in a fluidizedbed under the air-propane mixture is roughly the same as that in a conventional furnace under an endothermic atmosphere; however, there is no need to use the atmosphere generating facilities in the formerprocess. |
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