{"title":"Comparison of Microstructure and Non-metallic Inclusions in Top-Filled and Bottom-Filled Gray Iron Castings","authors":"Evan Carter, Jingjing Qing, Mingzhi Xu","doi":"10.1007/s40962-024-01356-y","DOIUrl":null,"url":null,"abstract":"<p>A bottom-filled rigging system was designed to produce gray iron castings, which was compared with a top-filled design in the present study. Filling and solidification of gray iron produced with the bottom-filled mold were compared with that for the top-filled mold. At similar cooling rate and solidification condition, the count of Type A graphite flakes was greater in the bottom-filled casting, while its graphite flakes were also finer in size. In addition, the statistical analysis of non-metallic inclusions using a scanning electron microscope equipped with auto feature analysis software also showed differences in inclusion composition, size, and population density between two castings. The results indicated that the filling turbulence promoted interactions between metal with air, which in turn influenced the formation of non-metallic inclusions. As a result, this impacted the nucleation of flake graphite in the gray iron.</p>","PeriodicalId":14231,"journal":{"name":"International Journal of Metalcasting","volume":"209 1","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Metalcasting","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s40962-024-01356-y","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
Abstract
A bottom-filled rigging system was designed to produce gray iron castings, which was compared with a top-filled design in the present study. Filling and solidification of gray iron produced with the bottom-filled mold were compared with that for the top-filled mold. At similar cooling rate and solidification condition, the count of Type A graphite flakes was greater in the bottom-filled casting, while its graphite flakes were also finer in size. In addition, the statistical analysis of non-metallic inclusions using a scanning electron microscope equipped with auto feature analysis software also showed differences in inclusion composition, size, and population density between two castings. The results indicated that the filling turbulence promoted interactions between metal with air, which in turn influenced the formation of non-metallic inclusions. As a result, this impacted the nucleation of flake graphite in the gray iron.
为生产灰铁铸件，设计了一种底部填充的索具系统，并在本研究中将其与顶部填充的设计进行了比较。对使用底部填充模具和顶部填充模具生产的灰铁的填充和凝固情况进行了比较。在相似的冷却速度和凝固条件下，底部填充铸件的 A 型石墨片数量更多，石墨片的尺寸也更细。此外，使用配备自动特征分析软件的扫描电子显微镜对非金属夹杂物进行统计分析，也显示出两种铸件在夹杂物成分、尺寸和数量密度上的差异。结果表明，充填湍流促进了金属与空气之间的相互作用，进而影响了非金属夹杂物的形成。因此，这影响了灰铁中片状石墨的成核。
期刊介绍：
The International Journal of Metalcasting is dedicated to leading the transfer of research and technology for the global metalcasting industry. The quarterly publication keeps the latest developments in metalcasting research and technology in front of the scientific leaders in our global industry throughout the year. All papers published in the the journal are approved after a rigorous peer review process. The editorial peer review board represents three international metalcasting groups: academia (metalcasting professors), science and research (personnel from national labs, research and scientific institutions), and industry (leading technical personnel from metalcasting facilities).
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