高温滑板润滑剂的研制与应用

采用高纯鳞片石墨微粉为主原料,去离子水为分散介质,辅以有机、无机结合剂及表面活性剂、消泡剂和各种抗氧化剂,采用球磨混合工艺制备了水基高温滑板润滑剂,研究了抗氧化剂种类(分别为B4C微粉、SiC微粉、h-BN微粉、TiB2微粉以及Si微粉)和加入量对润滑剂高温抗氧化性能的影响,并将自制润滑剂与日本进口润滑剂进行了不同温度(20～800℃)下的润滑性对比。结果表明:1)外加3%(w)h-BN微粉可赋予润滑剂涂层最佳的高温氧化防护效果;2)与日本滑板润滑剂相比,自制润滑剂在高温(200～800℃)下表现出更好的润滑性;3)显微形貌观察发现,自制滑板润滑剂的石墨较日本的粒度小,结合较紧密,更有利于润滑剂高温抗氧化性和耐磨性的提高;4)实际应用表明,自制滑板润滑剂在滑板表面形成润滑剂涂层后,能满足滑板4～5次连滑的要求,其应用效果与日本进口产品相似。

Preparation and application of high temperature lubricant for slide plate

The water based high temperature lubricant for slide plates was prepared using high purity flake graphite micropowder as starting material,deionized water as disperse medium,adding organic and inorganic binders as well as surfactant,defoaming agent and antioxidants,then ball mill mixing.The effects of various antioxidants(B4C micropowder,SiC micropowder,h-BN micropowder,TiB2 micropowder and Si micropowder,respectively) as well as their additions on the antioxidation of the lubricant at high temperatures were studied.The lubricating property of the prepared lubricant was compared with the imported lubricant from Japan at different temperatures(20-800 ℃).The results show that:1)the lubricant with 3 mass% of h-BN performs the best antioxidation at high temperatures;2)the prepared lubricant performs better lubricating property at high temperatures(200-800 ℃) than that from Japan;3)the SEM photos show that the prepared lubricant has smaller graphite,consequently better bonding strength,antioxidation and abrasion resistance than that from Japan;4)during practical application,the prepared lubricant coating on the slide plate can be used for 4-5 cycles,which is similar to that of the imported lubricant.