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題 名 | 鋼料經表面熱處理、固體潤滑劑與陶瓷被覆後之磨潤性能深討 |
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作 者 | 蘇演良; 林哲賢; 黃俊榮; | 書刊名 | 材料科學 |
卷 期 | 25:4 1993.12[民82.12] |
頁 次 | 頁283-294 |
分類號 | 440.365 |
關鍵詞 | 連續爆炸熔射; 電漿熔射; 固體潤滑劑; 表面熱處理; 微裂紋; 金屬轉移; Continuous detonation spraying; Plasma spraying; Soft film; Surface treatments; Microcracking; Material transfer; |
語 文 | 中文(Chinese) |
中文摘要 | 本文研究範疇分硬膜、軟膜及表面處理件三大部分,硬膜層被覆係以連 續爆炸熔射噴塗WC+12Co,另以電漿熔射噴塗Cr�烙�飢t不同比例ZrO�秘戊陴� 粉末於SCM440鉻鉬鋼上作為磨耗實驗件。軟膜層的選擇以常用的MoS�砥B Teflon、MoS��+Teflon等固體潤滑劑作研究的對象,熱處理件經滲碳、滲硫氮化、 鹽浴軟氮化(TF-1)+噴砂、高週波等熱處理後以SRV磨耗實驗機和鉻鋼球分別在乾 磨及潤滑條件下對磨,以評估其摩擦與磨耗特性。 實驗結果顯示,(1)乾磨條件下在所有陶瓷被覆件中WC-Co.有最低的摩擦係數 值,而且可將不同的配對材所得之摩擦係數圖形作幾種不同典型的分類。(2)至於 抗磨耗性:陶瓷以WC-Co最佳,軟膜層在乾磨時以軟氮化處理後被覆Teflon件,濕 磨時以經磷酸鹽皮膜之前處理者為佳,熱處理則以滲碳最耐磨。(3)乾磨條件下由 SEM觀察Cr�烙�倏i痕表面有微裂紋的存在,各陶瓷件的磨耗機構則因金屬轉移 層的緣故,黏附現象嚴重。在濕磨條件下,其金屬轉移情形較乾磨時輕微。(4) 固體潤滑劑選用時,摩擦係數越小則磨耗越小。但是表面處理件及陶瓷覆膜之粗 糙度越小則耐磨性越大。 |
英文摘要 | The objective of this research is to investigate the tribological performance of hard coating, soft film and surface treated parts. The hard coatings, deposited on SCM440, include WC+ 12%Co by continuous detonation spraying, ZrO��+8%Y�烙 ��,Cr�烙��+20%ZrO��,Cr�烙��+50%ZrO�� and Cr�烙�軏eramic coatings by plasma spraying. The soft films in this study are MoS��, teflon, and MoS�� blended with teflon, while the surface treatments include carburization, sursulf, salt bath soft nitriding (TF-I),and induction. The wear testing is performed on the SRV wear machine under dry and lubricated conditions, respectively. Scanning electron microscope was used for wear mechanism observation and X-Ray diffraction identified the phase transformation during coating process. The experiment concluded that : (1) Of all the ceramic coatings investigated under dry wear ,WC-Co possesses the lowest coefficient of friction, and the coefficient of friction plotted against time can be classified into four different types. (2) The WC-Co possesses the highest wear resistance. While among the solid lubricant, the teflon coating coupled with tufftrided pretreatment, under dry wear, and phosphating pre-treatment under lubricated wear, possesses the best wear resistance. Carburizationis the most wear resistant treatment of the surface treatments in this study. (3) The worn surface of Cr�烙�� under dry wear depicted the wear mechanisms of microcracking, while the dominant wear mechanism of steel/ceramic coating pair is material transfer of steel to the ceramic surface, the adhesionis very severe. The metal transfer, identified from ceramic surface, is much reduced under lubricatedwear. (4) The solid lubricant coated specimens that posses the lower coefficient of friction, and ceramiccoatings as well surface treatments that possess lower surface roughness, will induce better wear resistance. |
本系統中英文摘要資訊取自各篇刊載內容。