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dc.contributor.authorChen, Ching Hungen_US
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dc.description.abstract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。zh_TW
dc.description.abstractHydrogen 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.en_US
dc.description.tableofcontents摘要 i Abstract ii 目錄 iii 表目錄 v 圖目錄 vii 符號表 ix 1 前言 1 1.1 文獻回顧 2 1.1.1 氫脆 2 1.1.2 氫脆理論 4 1.1.3 氫源損害形式 8 1.1.4 氫相關損害形式 9 1.1.5 鋼材氫脆性質 13 1.1.6 氫脆相關研究 13 1.2 研究目的與方法 18 2 實驗設計與執行 19 2.1 實驗設計 19 2.2 熱處理 22 2.3 酸洗環境設定 24 2.4 實驗流程 25 3 結果與討論 30 3.1 酸洗環境實驗斷裂情況 30 3.2 純酸環境實驗結果 31 3.3 望目品質分析 34 3.4 迴歸分析 42 4 結論 50 5 參考文獻 51 附錄A 實驗設計 55 A.1 直交表 55 A.2 信號雜音比 55 A.3 變異數分析法 56 附錄B 治具設計圖 57 附錄C 滲碳 59 C.1 滲碳處理 59 C.2 氣體滲碳 59 附錄D 有限元素分析 61 D.1 分析模型建立 61 D.2 軸用扣環型號 5 64 D.3 軸用扣環型號 10 67 D.4 軸用扣環型號 20 70 D.5 應力情況比較 73 附錄E 抑制劑環境實驗 75 E.1 抑制劑環境實驗 75 E.2 變異數分析 80 E.2.1 高濃度酸劑暨添加A抑制劑實驗 80 E.2.2 高濃度酸劑暨添加B抑制劑實驗 81 E.2.3 低濃度酸劑暨添加A抑制劑實驗 82 E.2.4 低濃度酸劑暨添加B抑制劑實驗 83zh_TW
dc.subjecthydrogen embrittlementen_US
dc.subjectretaining ringen_US
dc.subjectDesign of Experimenten_US
dc.subjectTaguchi methoden_US
dc.subjectregression analysisen_US
dc.titleApplication of Retaining Ring to Environmental Hydrogen Embrittlement Test in Pickling Process of Steelen_US
dc.typeThesis and Dissertationzh_TW
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