Program for the thickness of composite surface layer counting
Czesław Baron, Jan Szajnar Politechnika Śląska, Wydział Mechaniczny Technologiczny, Instytut Materiałów Inżynierskich i Biomedycznych, Zakład Odlewnictwa ul. Towarowa 7, 44-100 Gliwice, Poland
Quarterly No. 1, 2008 pages 15-21
DOI:
keywords: cast steel, composite, casting composite, surfacing alloy layer, computer simulation
abstract The production of cast with composite surface layer is not complicated for technological reasons. However, the process of forming these layers is complex and depends on many technological and material factors. Because of great amount of factors, which influence the thickness, it is possible to use the theory of probability to calculate the thickness of composite layer in particular part of the cast. The composite layer can be 1 mm thick or 2 mm thick and so on. So we can deal with the composite layer formation process as with the process of forming some partial layers. It is assumed that these layers appears in turn, of course - with a certain probability. It means, that the composite layer is formed by a random variable. Its thickness is a the expected value of this random variable. It is assumed, that the layers appears in turn and in this way form whole composite layer, so we can treat this process as a simply stochastic process of entries. The preform temperature (concretely the preform time of staying in the temperature between TS – TL) was assumed as a basic factor which influences the thickness of composite layer. The algorithm (to determine the thickness of composite layer with the use of stochastic process) was worked out and used to build the program Preforma 1.1. The aim of researches was to prove the correctness of the method based on the calculus of probability thanks to the results of real casts. To prove the correctness of the stochastic method of determination the thickness of composite layer, the real thickness of composite formed during the real experiment were compared with the thickness of composite obtained from the simulation and program Preforma 1.1. In order to prove the correspondence between the preform times of staying in the temperature between TS – TL obtained from real experiment and simulation, the comparative analysis should be done in the same points of measurement. The goodness was obtained and allowed to use the results of simulation and real cast to build and check the mathematical model and computer program Preforma 1.1. The main conclusion is that the determined thickness of composite layer, with the use of program Preforma 1.1, are compatible with the thickness of composite layers measured during the experiment so this program is a useful tool to project the thickness of composite layers.