雷射表面紋理油袋幾何特徵對缺油潤滑磨潤行為的影響

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研究生：	羅健升 Jian-Sheng Luo
論文名稱：	雷射表面紋理油袋幾何特徵對缺油潤滑磨潤行為的影響 Effect of the geometry of oil pocket by laser textured surface on the tribological behavior under starved lubrication
指導教授：	林原慶 Yuan-Ching Lin
口試委員:	郭俊良 Chun-Liang Kuo 周育任 Yu-Jen Chou
學位類別：	碩士 Master
系所名稱：	工程學院 - 機械工程系 Department of Mechanical Engineering
論文出版年：	2021
畢業學年度：	109
語文別：	中文
論文頁數：	141
中文關鍵詞：	雷射表面紋理、微液動壓效應、物理楔面、物理吸附、油袋、磨潤性能
外文關鍵詞：	Laser surface texture, Micro hydrodynamic effect, Physical wedge, Physical adsorption, Oil pockets, Tribological performance
相關次數：	點閱：197 下載：2
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本研究在於探討雷射表面紋理(LST)油袋幾何特徵對於磨潤行為的影響。藉由奈秒光纖雷射於低碳鋼板材表面加工不同幾何特徵之油袋，並透過迴轉式磨耗試驗機，進行Pin-on-Disc之缺油潤滑的磨耗測試，利用場發射雙束型聚焦離子束顯微鏡、能量散佈光譜儀等分析設備觀察其磨耗型態，藉此評估不同油袋幾何特徵對磨潤性能的影響。
研究結果表明，當表面具有油袋時，在滑動過程中，利用物理吸附效應，將油袋內潤滑油帶入兩接觸表面接觸之摩擦區，可以減緩失油潤滑的現象，使整個磨耗過程中，摩擦區保有一定的潤滑油，進而保持平穩的摩擦行為。此外，具有物理楔面幾何特徵的油袋，其摩擦表現優於矩形幾何特徵者，主要原因為物理楔面能產生較大的流體壓縮比，使油袋附近的微液動壓效應較為明顯，進而使摩擦係數較低且穩定。

This study aims to investigate the effect of the geometric characteristics of the oil pockets scraped by laser under starved lubrication on the tribological performance. The different surface patterns on the low carbon steel specimen were fabricated by nano-second fiber laser. The frictional test were conducted using a rotating type tribometer. Carry out Pin-on-Disc wear test under starved lubrication. And by using analysis equipment such as Dual Beam Focused Lon Beam and EDS to observe the type of wear, to evaluate the impact of the wear performance of oil pockets with different geometric characteristics.
The experiment results showed that the sliding surface will bring the lubricant from the oil pockets into the friction zone by the physical adsorption effect, resulting in maintaining a stable friction performance. In addition, the friction performance of the oil pocket with physical wedge surface geometry is better than that of rectangular geometry. The main reason is that the physical wedge surface can produce a larger fluid compression ratio, which makes the micro hydrodynamic effect near the oil pocket more obvious. The friction coefficient is low and stable.

摘要 I
Abstract II
誌謝 III
目錄 IV
表索引 VI
圖索引 VII
第一章 前言 1
1-1研究動機 1
1-2研究目的 2
第二章 文獻回顧 3
2-1潤滑模式型態 3
2-2磨耗型態(Wear Type) 5
2-3液動壓效應研究 11
2-4表面紋理之微液動壓效應研究 21
2-5不同雷射種類對於表面紋理之研究 28
2-6雷射表面紋理對於磨潤行為之研究 32
第三章 實驗方法及步驟 37
3-1實驗設備 37
3-1-1奈秒光纖雷射加工機 37
3-1-2迴轉式磨耗試驗機台 38
3-2分析儀器 40
3-2-1 全自動洛氏硬度試驗機 40
3-2-2光學顯微鏡 41
3-2-3可見光干涉儀 42
3-2-4場發射雙束型聚焦離子束顯微鏡 43
3-3試片製備 44
3-3-1下試片製備(固定試片)    44
3-3-2上試片製備(滑動試片)    46
3-3-3治具準備 49
3-4雷射單向加工參數與材料移除深度之關係 52
3-5雷射表面紋理設計 59
3-5-1油袋外觀及分布 59
3-5-2油袋縱向截面之幾何特徵 62
3-6磨耗試驗 66
3-6-1磨耗試驗相關參數設定 66
3-6-2磨耗試驗步驟 68
第四章 結果與討論 70
4-1不同雷射掃描路徑與表面紋理的形貌 71
4-2未表面紋理試片之磨潤行為分析 84
4-2-1摩擦行為分析 84
4-2-2磨耗型態分析 86
4-3不同深度之矩形油袋對磨潤行為的影響 89
4-3-1摩擦行為分析 89
4-3-2磨耗型態分析 92
4-4物理楔面之油袋對於磨潤行為之影響 97
4-4-1油袋傾角效應 97
4-4-2漸縮與漸擴物理楔面之比較 103
4-5不同油袋幾何特徵之磨潤行為分析 109
4-6加工造成的段差深度對物理楔面磨潤行為之影響 111
4-6-1摩擦行為分析 111
4-6-2磨耗型態分析 115
4-7物理楔面之油袋分布對於磨潤行為的影響 119
4-7-1不同油袋寬度之效應 120
4-7-2單位長度油袋數目對於摩擦行為的影響 120
第五章 結論 124
參考文獻 126

                                

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