頁籤選單縮合
題名 | 大鋼胚表面品質改善=The Improvement of Bloom Surface Quality |
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作者 | 戴敏政; 林國治; 王文賢; 洪正雄; | 書刊名 | 技術與訓練 |
卷期 | 24:2=195 1999.04[民88.04] |
頁次 | 頁38-47 |
專輯 | 煉鋼專集 |
分類號 | 454.82 |
關鍵詞 | 針氣孔; 轉角直裂; Pinhole; Longitudinal corner crack; |
語文 | 中文(Chinese) |
中文摘要 | 轉角直裂及針氣孔為大鋼胚之主要表面缺陷。經工場實驗證實,造成針氣孔之 連鑄製程原因包括鋼液二次氧化、模液面向下偏離,導致浸入式注嘴浸入深度不足, 以及為了防止流鋼嘴堵塞所通入之氬氣,在不及逸出鋼液而被鑄胚殼捕捉等因素。轉 角直裂之發生則與鑄模銅板經長期使用後發生變形與磨損有關。經採取變更流鋼嘴通 氣位置設計,管制氬氣通入量、提升澆鑄氣密性、改善浸入式注嘴浸入深度偏離標準 現象及管制模子使用回數後,已獲致相當成效。 |
英文摘要 | Pinhole and longitudinal corner crack are the major surface defects found in the continuous casting bloom. In plant trials, it has been showed that the occurrence of pinhole was associated with the molten steel re-oxidation, insufficient submergence depth of nozzle due to abnormal mold level moving downward and the entrapment of argon bubbles (prevention of nozzle clogging) into solidified shell due to excessive argon flow rate. On the other hand, it also has been observed that the longitudinal corner crack was affected by the mold dimension variation due to mold distortion and wear. Great merit had been attained through adoption of the suitable countermeasures including modification of gas-purge position of upper nozzle, minimization of argon flow rate without causing nozzle clogging, enhancement of sealing effect, improvement of submergence-depth deviation, management of mold dimension. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。