查詢結果分析
來源資料
頁籤選單縮合
題名 | A Study on the High Temperature Carburizing in Water-Gas by Fluidized Bed Furnace=流體床高溫木炭水煤氣滲碳之研究 |
---|---|
作者姓名(中文) | 陳繁雄; 謝聰明; | 書刊名 | 大同學報 |
卷期 | 27 1997.11[民86.11] |
頁次 | 頁281-290+320 |
分類號 | 440.3 |
關鍵詞 | 流體床; 高溫木炭; 水煤氣; 滲碳; |
語文 | 英文(English) |
中文摘要 | 工業上滲碳所使用的氣氛種類甚多。以吸熱型爐氣及滴注式木精分解爐氣為主,兩者均在930℃左右的溫度下操作。該系列之滲碳性氣體如保持氣氛成份不變,皆會因溫度之昇高而降低其碳勢,且如提昇其碳勢至某較高值時,則有積碳之虞,使得碳勢不昇反降。以流體床滲碳由於顆粒之沖刷,無虞因積碳而降低碳勢,正可改善此缺點。本論文以高於傳統之滲碳溫度,在流體床中以水煤氣研究提昇滲碳速率之可行性。 本研究是以木炭粉混合不同比率的麵粉(用作結合劑)及碳酸鋇(當作催化劑)經攪拌、擠製、截斷等製程使成適合流體化之碳粒。並以空氣中內含不同比率的飽和水蒸氣作為流體化氣體,通入950℃∼1100℃流體床爐內與碳粒反應生成水煤氣爐氣,研究不同比率的飽和水蒸氣與碳酸鋇添加量對滲碳能力的影響。同時,兩種不同材質的鋼種,於1100℃下晶粒成長的情形也一併討論。 結果顯示,組成比75wt%(77wt%木炭粉+23wt%麵粉)+25wt%碳酸鋇之碳粒,以空氣中內含 42.4%水份之飽和水蒸氣量作為流體化氣體於1100℃下處理10分鐘,所獲得的0.48mm有效滲碳層效果為最佳,原沃斯田鐵晶粒成長2號之ASTM結晶粒度。 |
英文摘要 | In industry, carburizing treatment has been carried out in various types of atmosphere, such as endothermic atmosphere, methanol drip cracking atmosphere, etc. Both of them are treated at the temperature around 930 ℃, but due to sooting problem, higher carbon potential can not be obtained by conducting these processes in conventional facilities. This research studied the water gas carburizing treatment processed at 950 ℃-1100 ℃ in a fluidized bed furnace for taking the advantages of without sooting problem and conducted at higher temperature for acquiring higher carburizing rate. The carburizer was made of charcoal powder mixed with different amount of flour (used as a bonding agent) and barium carbonate (used as an energizer) then extruded and cut into granule shape. The air used for fluidization was premoistured. The carburizing abilities of the atmospheres were investigated by varying the water content of the fluidizing air, and amount of barium carbonate additions. The grain growth of the steels have also been studied by using two kinds of killed-steel since majority of the experiments were conducted at 1100℃ where grain growth is of concern. The best condition to render 0.48 mm of effective case depth was when conducting fluidized bed carburization at 1100 ℃ for 10 minutes with 75wt% carburizer (containing 77wt% charcoal powder +23wt% flour) and 25wt% barium carbonate addition, fluidized in the air containing 42.4% of water. The prior austenite grain size grew 2 ASTM numbers after such a treatment. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。