Detectability of Defect and its Beginning on the Formed Cast-iron Cast

IF 0.6 Q4 METALLURGY & METALLURGICAL ENGINEERING Archives of Foundry Engineering Pub Date : 2023-11-06 DOI:10.24425/afe.2019.127119
E. Kantoríková
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引用次数: 0

Abstract

The article describes the detection of a defect in a cast iron casting. It analyzes the cause of the crack in the Turbine Component casting. In this article, we are focusing on a particular turbine casting that is commonly used in automobiles as one of the components for turbochargers. The turbine is a casting made of ductile cast iron with a visible crack on the naked eye. The formation of cracks in castings is a common but undesirable phenomenon in the foundry practice. It is important to identify the errors, but also to know the cause of defects in castings. The solution is a detailed error analysis. In this paper I used metallographic analysis and magnetic powder method. The crack formation is due to tension in the casting, which results in tensile, shear, or shear forces. The crack formation kinetics is difficult because it is still very low during hardening and shortly after the casting is overloaded. The crack is most often due to core resistance or shrinkage molds that begin after the surface layer is tightened when the strength of the material is negligible to the end of the crystallisation.
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成形铸铁件缺陷的可检测性及其开始
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来源期刊
Archives of Foundry Engineering
Archives of Foundry Engineering METALLURGY & METALLURGICAL ENGINEERING-
CiteScore
1.10
自引率
16.70%
发文量
0
期刊介绍: Thematic scope includes scientific issues of foundry industry: Theoretical Aspects of Casting Processes, Innovative Foundry Technologies and Materials, Foundry Processes Computer Aiding, Mechanization, Automation and Robotics in Foundry, Transport Systems in Foundry, Castings Quality Management, Environmental Protection. Why subscribe and read
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