engleski

The knowledge bases for selecting the surface modification treatment

The main influence factors on the type and intensity of tribological wear are: construction of tribological system, the properties of substrate material and surface layer, and the working parameters. Because of that, wear problems are usually very complex for solving. Another obstacle is the lack of quantitative and comparable data on wear resistance of materials. Data, information and knowledge needed for decision making are mostly qualitative and come from experts and from the exploitation of the tribological systems. Knowledge bases are the basic modules in the development of the expert system for solving the tribological problems. The following knowledge bases, related to particular surface modification treatments, are defined and established: the technical characteristics of the treatment - description, achievable properties ; the characteristics about the base materials (substrata) commercial characteristics of the treatment &#8211 ; ; ; the investment and labour cost, manufacturers and users of the equipment ; the properties of surface treated and exploited tribological workpieces ; description and photos of worn out workpieces ; the standards for determination of the layer depth and the methods for testing wear resistance ; the microstructures of the surface layers. Besides the traditional heat treatment processes - carburising, nitriding, boriding, surface hardening etc, many new surface modification processes in today's use are recommended in order to decrease wear intensity. For now, the described surface modification treatments come from the following groups: treatments with the martensitic transformation, treatments with the modification of chemical composition, thermal spraying, PVD and CVD, weld hard facing, laser modification. Browsing, searching and linking between particular modules of this expert system are enabled.

surface modification treatment; selection of treatment; expert systems

nije evidentirano