Quality improvement of cast parts of ice: accounting technological aspects of the automated foundry
DOI:
https://doi.org/10.15587/1729-4061.2015.56039Keywords:
cast part, internal combustion engine, aluminum iron, vermicular graphiteAbstract
The design-technological schematics, providing the possibility to meet the alloy quality requirements at the "melting - casting" stage, taking into account a number of technological factors, in particular, melting and thermo-temporal treatment processes and modification processes were proposed. The latter is associated with the presence of the modifier survivability effect. Using the on-off equipment: double-bath electric arc furnaces; induction melting complexes, operating on the "butterfly" system; on-off casting machines, considered as elements of the queuing system "furnace - foundry conveyor" in layouts was proposed. The presented options have the advantage of rational combining of a number of technological operations, providing compromise solutions by the management efficiency criteria: speed, energy efficiency and performance.
The application of aluminum compacted graphite iron for body parts and pistons of ICE was substantiated, and it was shown how the selection of the optimal chemical composition by Al and Si can provide a transition to a higher brand of cast iron. In particular, the optimum concentrations of these elements, ensuring maximum tensile strength - about 300MPa: Al = 1,8% and Si = 1,5% were given. The prospects of using aluminum iron to increase the tensile strength up to 500 MPa due to the modifying effect, providing vermicular or nodular graphite in the microstructure were shown.
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Copyright (c) 2015 Олег Викторович Акимов, Оксана Сергеевна Коваль, Антон Анатольевич Пуляев, Егор Павлович Дымко, Татьяна Александровна Егоренко, Святослав Викторович Высоцкий
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