Estudo de redução de custos no setor de fundição de uma empresa de médio porte por meio de adequação de liga não-ferrosa ao processo.

Abstract

The present work is a cost reduction project involving the alloy fluidity parameter and the correction elements for this parameter, which are zinc, aluminum, refining salt and magnesium. A packing in the casting matrix outside the parameters can generate fill failure problems, for lack of flowability, and cracking, for the excess of components which impart fluidity to the alloy. We have that the aluminum inserted in the alloy entails at the same flow potential that six times the amount of zinc and the cost of one is close to half the cost of the other. This cost difference brought the opportunity for partial replacement of zinc by aluminum in the alloy correction. The factors that should be impacted were controlled in order to measure the viability of the process. The results showed that the addition of aluminum reduced the cost of correction per ton without damaging the production. As a consequence of the higher flowability for packaging, there has also been a considerable reduction in the consumption of magnesium and refining salt, a set of elements used for grain refining and also gives greater alloy fluidity by the addition of magnesium.