A Review of Surface Treatments for Sliding Bearings Used at Different Temperature

Abstract

The boundary lubrication and dry friction of plain bearings at different work temperature are unable to be avoided under the start and stop condition. The poor lubrication is one reason of bearing broken. In order to improve the tribological properties and select the best treatment for different bearings used at different temperature, the studies of different treatment technologies are reviewed in this paper. The review shows that the shortages of bonding fiber woven materials, inlaying solid lubricating materials, electro plating and magnetron sputtering are poor temperature resistance, low load capacity, environment pollution and low production efficiencies respectively. Based on the analyses and summaries, the liquid dope spraying and thermal powder spraying are suggested to deposit coating on the surface of bearing which working temperature is lower than 200 and above 800°C respectively. However, the technology processes, the mechanisms of spraying and self-lubrication materials should be studied further and deeply.

Development of Self-lubricating Polymeric Composites Based on PTFE

“…Lubrication-free plane bearings can be made of antifriction materials by powder metallurgy [2,9,10]. Powder metallurgy is used to make porous friction parts sintered from powders (porous bearings, multilayer, metal-plastic and metal-glass antifriction materials), which are impregnated with liquid lubricant before use in friction units [11][12][13].…”

“…It is known that the main criterion for the reliability and durability of machines and mechanisms is the operability of parts as well as operability of tribological pairing, which include sliding bearing units, bearing shells, guiding elements, hinges, etc. The working surfaces of such parts undergo intense wear during operation, because they operate in a wide range of speeds and loading conditions -dynamic loads and vibrations; the effect of abrasive and chemically active environments; insufficient lubrication [1][2][3][4][5][6]. Such operating conditions quickly lead these parts to achieve maximum wear of their working surfaces and, as a result, to the loss of performance of important components of the machine.…”