本文關(guān)鍵詞： 干摩擦 熱處理 自潤滑 摩擦性能指標　出處：《大連海事大學》2012年碩士論文　論文類型：學位論文

【摘要】：在許多極為苛刻的條件下,運動部件難以采用常規(guī)的油脂潤滑,如處于塵土泥沙、潮濕等惡劣環(huán)境的采礦機械的傳動件,處于海水和酸等腐蝕介質(zhì)下的船舶機械的傳動件,所以這些傳動件通常在干摩擦條件下工作。因此對材料在干摩擦條件下的摩擦學特性的研究十分必要。而熱處理組織對其摩擦磨損性能有著極大的影響,由于試樣的強度和硬度較低,試驗時產(chǎn)生嚴重的粘著磨損甚至膠合現(xiàn)象,因此采取的是承重圓環(huán)內(nèi)表面與旋轉(zhuǎn)軸配合的摩擦試驗方法。 本實驗對圓環(huán)(ZG25MnCrNiMo鋼)進行淬火處理,分別與淬火、調(diào)質(zhì)和退火的轉(zhuǎn)軸(40Mn2鋼)進行配對實驗,三組試驗中對圓環(huán)的影響均不大,而淬火、調(diào)質(zhì)、退火轉(zhuǎn)軸的磨損量依次增高。當對圓環(huán)進行調(diào)質(zhì)處理,對轉(zhuǎn)軸進行淬火、調(diào)質(zhì)和退火處理,結(jié)果進行退火處理的轉(zhuǎn)軸對圓環(huán)、轉(zhuǎn)軸磨損量的影響都遠大于調(diào)質(zhì)和淬火轉(zhuǎn)軸,而進行調(diào)質(zhì)和淬火的轉(zhuǎn)軸對圓環(huán)、轉(zhuǎn)軸磨損量的影響差距不大。最后對圓環(huán)進行局部淬火處理,分別對轉(zhuǎn)軸進行調(diào)質(zhì)和淬火處理,淬火轉(zhuǎn)軸比調(diào)質(zhì)轉(zhuǎn)軸對圓環(huán)的磨損量高,而調(diào)質(zhì)處理后對轉(zhuǎn)軸的磨損量要略高于淬火處理后對轉(zhuǎn)軸的磨損量。得出通過改變熱處理工藝(主要改變了其硬度),對圓環(huán)和軸的磨損量有了顯著影響的結(jié)論。 此外,對鋼基體鑲嵌固體潤滑劑PTFE與未鑲嵌固體潤滑劑的鋼基體進行摩擦磨損性能比較研究,鑲嵌了PTFE的金屬基體比未鑲嵌的金屬基體摩擦系數(shù)穩(wěn)定,且摩擦系數(shù)較低約為0.45,摩擦系數(shù)隨著固體潤滑劑嵌入量的增大而減小從0.45降低到0.35,未鑲嵌固體潤滑劑的摩擦系數(shù)穩(wěn)定在0.9。隨著載荷的增加,固體潤滑劑形成的潤滑膜逐步被破壞,摩擦系數(shù)開始增大,但仍小于未鑲嵌固體潤滑劑的摩擦系數(shù),在未鑲嵌固體潤滑劑的金屬基體中摩擦系數(shù)不能趨于一個穩(wěn)定值。隨著速度的增大,富集在表面的固體潤滑劑更加均勻,更容易形成潤滑膜,降低了磨損量。但速度仍不宜過大,避免破壞摩擦表面固體潤滑膜的完整性。因此,正確的采用鑲嵌式自潤滑復(fù)合材料對改變摩擦學性能有著重要的作用。
[Abstract]:In many extremely harsh conditions, it is difficult to use conventional grease lubrication for moving parts, such as driving parts of mining machinery in harsh environment, such as dust and silt, humidity and so on. The transmission of a ship's machinery in corrosive media such as sea water and acid. Therefore, it is necessary to study the tribological properties of materials under dry friction conditions, and the heat treatment structure has a great influence on the friction and wear properties. Due to the low strength and hardness of the specimen, serious adhesion wear and even adhesion phenomenon occur during the test. Therefore, the friction test method of the inner surface of the bearing ring and the rotation shaft is adopted. In this experiment, the ring ZG25MnCrNiMo steel was quenched and matched with the quenched, quenched and annealed rotating shaft steel 40Mn2. In the three groups of tests, the ring has little effect on the ring, but the wear amount of quenching, tempering and annealing rotation shaft increases in turn. When the ring is tempered, the rotation shaft is quenched, tempered and annealed. Results the effect of the rotation axis after annealing on the ring and the wear of the shaft is much greater than that of the quenched shaft and the quenched shaft, but the rotation shaft pair of the ring is tempered and quenched. Finally, the ring is treated by local quenching, quenching and quenching respectively. The quenching shaft is higher than the quenched shaft to the ring wear. The wear amount of the shaft after tempering treatment is slightly higher than that of the shaft after quenching treatment. It is concluded that the hardness of the shaft is changed by changing the heat treatment process. The results show that the wear rate of rings and shafts is significantly affected. In addition, the friction and wear properties of steel substrate embedded with solid lubricant PTFE and those without solid lubricant were compared. The friction coefficient of the metal matrix embedded with PTFE is stable than that of the unembedded metal matrix, and the friction coefficient is about 0.45. The friction coefficient decreases from 0.45 to 0.35 with the increase of solid lubricant intercalation, and the friction coefficient of unembedded solid lubricant is stable at 0.9. with the increase of load. The lubricating film formed by solid lubricant was destroyed gradually, and the friction coefficient began to increase, but still less than the friction coefficient of unembedded solid lubricant. The friction coefficient in the metal substrate without solid lubricant can not reach a stable value. With the increase of the velocity, the solid lubricant enriched on the surface becomes more uniform, and the lubricating film is more easily formed. The wear amount is reduced, but the velocity is not too large to avoid destroying the integrity of the solid lubricating film on the friction surface. Therefore, the correct use of the mosaic self-lubricating composite plays an important role in changing the tribological properties.
【學位授予單位】：大連海事大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH117.1

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