本文關(guān)鍵詞：滑石粉為鋁合金熱擠壓用潤滑劑的實驗研究　出處：《中北大學(xué)》2011年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 滑石粉 潤滑劑 圓環(huán)鐓粗 摩擦系數(shù)

【摘要】：目前,在熱擠壓生產(chǎn)加工成形過程中使用的潤滑劑主要是石墨水劑或油劑,它的潤滑效果非常明顯,但是在使用過程中,空氣和設(shè)備中殘留著大量的石墨粉塵,污染環(huán)境,嚴重影響到了操作人員的健康和工作環(huán)境質(zhì)量。因而,希望能夠制備其它的潤滑劑來代替石墨,以改善現(xiàn)在的工作環(huán)境。 本文針對鋁合金熱擠壓對潤滑提出的環(huán)保要求,以滑石粉為主要基體,通過添加氧化銅抗磨劑、三氧化二鋁脫模劑和聚丙烯酰胺粘結(jié)劑等添加劑,獲得了一種新型潤滑劑。在圓環(huán)鐓粗實驗的基礎(chǔ)上確定了各組分件的最佳配比,同時還研究了最佳配比潤滑劑的潤滑性能并對其進行實體零件熱擠壓模擬實驗。 實驗結(jié)果表明: 1.通過圓環(huán)鐓粗法對不同配比潤滑劑摩擦系數(shù)的測定,最終確定潤滑劑中滑石粉、Al_2O_3、CuO和聚丙烯酰胺的最佳質(zhì)量配比為7:1:1:1。 2.最佳配比滑石粉新型潤滑劑摩擦系數(shù)隨著溫度的升高而增大,溫度至440℃出現(xiàn)最小值,μ=0.185。 3.此潤滑劑可以有效的促進鋁合金均勻變形,反映變形均勻性指標的腰鼓百分比變化曲線與其摩擦系數(shù)變化曲線的變化趨勢一致,均隨溫度的升高而增大,至440℃出現(xiàn)最小值,這也說明了本文實驗的可靠性。 4.在摩擦系數(shù)對比圖中,在440℃前該潤滑劑摩擦系數(shù)平均比石墨的大0.03,在440℃時,兩者相差0.005;從金相圖可知該潤滑劑同石墨潤滑劑相似對鋁合金微觀組織沒有影響。因此,配比為7:1:1:1的滑石粉新型潤滑劑作為一種環(huán)保潤滑劑取代石墨具有一定的可行性。 5.通過模擬實驗的驗證,該滑石粉潤滑劑能有效的減少金屬動態(tài)損傷的分布、增加動態(tài)損傷的均勻性,具有較好的潤滑作用。
[Abstract]:At present, the lubricant used in hot extrusion process is mainly graphite water agent or oil agent, its lubricating effect is very obvious, but in the process of use, a large amount of graphite dust remains in the air and equipment. Pollution of the environment has seriously affected the health of the operators and the quality of the working environment. Therefore, it is hoped that other lubricants can be prepared to replace graphite in order to improve the present working environment. In this paper, aiming at the environmental protection requirement of aluminum alloy hot extrusion for lubrication, with talc powder as the main matrix, the additives such as copper oxide antiwear agent, aluminum trioxide release agent and polyacrylamide binder were added. A new lubricant was obtained and the optimum proportion of each component was determined on the basis of ring upsetting experiment. At the same time, the lubricating performance of the best proportion lubricant was studied and the hot extrusion simulation experiment of solid parts was carried out. The experimental results show that: 1. The friction coefficient of lubricant with different ratio was determined by ring upsetting method. Finally, the talc powder and AlSZ _ 2O _ 3 in lubricant were determined. The best mass ratio of CuO and polyacrylamide is 7: 1: 1: 1. 2. The friction coefficient of the new type lubricant increases with the increase of temperature, and the minimum temperature is 440 鈩，

本文編號：1424355