ABSTRACT
Surface analysis of defects in cast iron produced in cast iron castings is effective for evaluation of defects in castings and implementing preventive measures. The present authors previously reported in AFS Transactions studies on pinhole defect, penetration defect ,and inclusion defect.1~3 In the present report, we describe the results of analysis employing Energy Dispersive X-ray Spectrometer-Scanning Electron Microscope (SEM • EDS), a surface analyzer, on blowhole defect, shrinkage defect, orange peel defect, cold shut defect, crack defect, and veining defect.
INTRODUCTION
The present authors previously reported in AFS Transactions that application of surface analyzers such as SEM • EDS ,and
X-ray Micro Analyzer (EPMA) to casting defects produced in cast iron castings is effective for evaluating casting defects and
implementing countermeasures and preventive measures against such defects.1~3 Use of surface analyzers, which is a
micrographic analytical method, is especially effective for judging casting defects involving chemical reaction in portions that are difficult to judge with the naked eyes. For this reason, we first applied surface analyzers to pinhole defect, penetration defect, and inclusion defect involving chemical reaction, and explained (the results) in AFS Transactions. In addition to the defects, the authors also applied surface analyzers to blowhole defect, shrinkage defect, orange peel defect, cold shut defect, surface fold defect, crack defect (including tear defect), and veining defect. These are macrographic defects that can be judged to some extent even with the naked eye, and the information obtained by surface analysis of such defects may be rather little but will be helpful for evaluation of casting defects and implementing preventive measures against them. We will therefore apply surface analyzers also to such defects and explain typical examples in AFS Transactions.
castings of the required dimensions
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