Quality Control in Foundry – Analysis of Casting Defects

Abstract

Quality can be perceived in accordance with requirements, costumer needs. It, in returns, implicates necessity of verification of this accordance, i.e. quality inspection. And that means how, on the ground of this inspection, to improve quality of articles and services. To speak about possible usage of repairing methods in firm, it is necessary to mention exact qualifications of criterions usage of quality improvement tools. Separations of quality criterions takes place to investigate all spheres of formation and usage of products: preproduction, production and after production phase. Casting defects can negatively impact the bottom line of a foundry. At the simples’ level, they manifest as rework costs or casting scrap costs. However, in many cases, the casting defects may be discovered at the machining stage, at the assembly stage or during use of the component. The resultant value added costs and warranty costs may sometimes be passed on to the foundry by their customer. In this chapter the most common foundry defects in three kinds of castings are analysis. It was observed quantity of defected castings and kinds of defects in the castings during the year. The attention was paid to sand inclusions and factors that can influence the sand inclusions origin.