Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/1551
標題: 應用工業軸用扣環於鋼鐵材料酸洗製程的環境氫脆檢驗研究
Application of Retaining Ring to Environmental Hydrogen Embrittlement Test in Pickling Process of Steel
作者: 陳勁宏
Chen, Ching Hung
關鍵字: 氫脆
hydrogen embrittlement
扣環
酸洗
實驗設計
田口方法
迴歸分析
retaining ring
pickling
Design of Experiment
Taguchi method
regression analysis
出版社: 機械工程學系所
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摘要: 氫脆乃是環境破壞的一種方式,亦是影響產品良率高低與否的因素之一,若能加以探討因子在酸洗製程環境影響,亦是對製程環境改善,減少損失有所助益。 本研究利用軸用扣環,應用實驗設計法檢驗製程環境氫脆現象,制訂實驗計畫表,將扣環幾何型號大小、硬度、開度及扣環開啟後等待酸洗浸泡時間納為實驗因子,並應用於純酸的酸洗製程環境,觀察由上述因子及其水準所搭配的實驗當中,扣環在浸泡過程產生斷裂的數量。再根據具低、高濃度差異的純酸環境,進行依扣環斷裂數的望目品質特性分析,以尋求適合檢驗氫脆的因子水準值,而其實驗的條件組合可作為檢驗的參考。 本研究針對兩純酸環境可能的望目值進行迴歸分析並加以預測驗證,就檢驗氫脆效果而言,以實驗計畫表中的扣環型號5、硬度區間HV590-620、開度的百分比100%及扣環開啟等待浸泡時間30分鐘的條件組合,於兩純酸環境的實驗值與預測值,差異較顯著,且實驗值與預測值,亦差距不大,故此實驗組合可適於純酸環境檢驗氫脆現象。
Hydrogen embrittlement is an environmental damage which affects the quality of products. If the factors causing hydrogen embrittlement af-fected by environment during pickling process could be fixed, the envi-ronment in the process would be improved and thus the loss would be re-duced. Before that, a method to check pickling environment without im-mersing products should be well defined. Thus, in this study, a retaining ring was applied to examine the pick-ling environment on hydrogen embrittlement. By setting the size, hardness, and opening of the ring and the pre-immersion duration prior to pickling as the factors for Design of Experiments, a series of experiments with dif-ferent setting levels for each factor were executed to observe the number of broken retaining rings pickled in different concentrations of acid with-out any additions, respectively. Among the experiment results, the most suitable level of each factor to sift a pickling environment was sought by setting various nominals for each concentration of acid according Taguchi method. As a result, a ring of type 5 having hardness between HV 590 and 620 clamped onto a round rod in diameter 5 mm and waiting for 30 min-utes before immersing into the pickling liquid was found as the most suit-able condition for checking the environment for hydrogen embrittlement in the pickling process by using regression analysis, additionally, which matched the experiment results.
URI: http://hdl.handle.net/11455/1551
其他識別: U0005-1708201114031100
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-1708201114031100
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