摩擦磁化機制之基礎研究

Fundamental studies on tribo-magnetization mechanisms

劉鑑德(Chien-te Liu)

指導教授 ： 張育斌 ； 周煥銘

崑山科技大學/工程學院/機械工程研究所/碩士(2006年)

https://doi.org/10.6828/KSU.2006.00023

摘要

本研究採旋轉式摩擦磁化試驗機，以鐵金屬為主要材料，在乾燥且嚴重磨耗的條件下，探討滑動速率、垂直負荷、含碳量百分比以及鎳薄膜鍍層對於表面磁化機制之影響。根據動態量測摩擦係數、摩擦磁化的實驗結果，配合磨耗損失及磨耗顆粒之SEM照片觀察，發現隨滑動速率之增加，界面溫昇呈現正比增加，且因摩擦熱而消磁之趨勢亦隨之明顯，其磁與速度之關係式：G = 7200 v-1.3。
並且，隨垂直負荷之增加，磨耗損失量增加而導致表面摩擦磁化之趨勢亦隨之明顯，其磁與荷重之關係式G = 0.1491L2 + 3.2196L - 4.4422。結合上述兩者之成果與物理學之學理，本研究因此而提出表面摩擦磁化機制如下：(a)因摩擦及磨耗而使得表面產生”磨耗磁化”。(b)因摩擦而使磁性分子分佈方向均一化的”同向磁化”。(c)因摩擦熱而使界面溫昇的”熱消磁”。
除上所述之結果外，尚追加研究碳鋼材料之含碳量對於表面磁化機制之影響，由於碳鋼材料之硬度取決於含碳量之多寡，因此，含碳量會同時影響磨潤性質與表面磁化機制。此部分之實驗結果發現隨含碳量之增加，摩擦係數與表面生磁量均隨之降低。
最後，更進一步以軟鐵為基材，並於表面鍍一層10μm之鎳薄膜，來研究工業電鍍薄膜之防鏽及抗磨耗的效果，且與鐵金屬自己配對摩擦之實驗結果作比較分析。綜合此部分之實驗結果可提出：(a)鐵鍍鎳薄膜之表面磁場與垂直負荷之關係式為G = 0.8511L2 + 0.7321L - 1.2038。(b)表面磁場之動態變化也具有成為動態監控硬質磁性薄膜磨潤行為的發展潛力。

關鍵字

摩擦磁化

並列摘要

The mechanisms of tribo-magnetization and the associated wear behavior of self-mated pair of iron in the form of pin on disk under dry severe wear condition were investigated using a rotating friction tester. The major parameters were the sliding speeds, normal loads, carbon content percentages, and the Ni-film coatings. According to the experimental results of friction coefficient and tribo-magnetization, with wear loss and the SEM observations of wear particles, it was found that the interface temperature rise increased with increasing the sliding speed, and the thermal demagnetization was obviously at the higher sliding speeds. Finally, the relationship between the sliding speed and tribo-magnetization was proposed as G = 7200 v-1.3.
Moreover, the wear loss increased with increasing the normal load, and the wear magnetization was obviously at the higher normal loads. Similarly, the relationship between the normal load and tribo-magnetization was proposed as G = 0.1491L2 + 3.2196L - 4.4422. Combined the above two formulas with the uniform magnetization proposed in the physical science, the tribo-magnetization mechanisms were concluded as: (a) wear magnetization, (b) uniform magnetization, (c) thermal demagnetization.
Furthermore, the effects of the carbon content percentage on the tribo-magnetization mechanisms wear also investigated in this paper. Generally, the surface hardness was significantly influenced by the carbon content percentage for the carbon steels. Hence, the carbon content percentage not only influenced the tribological properties but also the tribo-magnetization mechanisms. Experimental results showed that the friction coefficient and surface magnetization decreased with increasing the carbon content percentage.
Finally, the iron specimens with Ni-film coatings were used in this study to investigate the corrosion resistance and the wear resistance of the electroplating films. Moreover, the related results were compared with those of the self-mated iron pairs. The following results were proposed as: (a) the formula of normal load and tribo-magnetization for iron rubbing on iron with Ni-film coatings is G = 0.8511L2 + 0.7321L - 1.2038, (b) Variations of the tribo-magnetization can be successfully applied to monitor the tribological properties between the hard magnetic films.

並列關鍵字

tribo-magnetization mechanisms

參考文獻

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