Microstructure and Mechanical Properties of a Wear-Resistant As-Cast Alloyed Bainite Ductile Iron
查看参考文献23篇
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文摘
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An as-cast bainite ductile iron with excellent mechanical properties and wear resistance was fabricated by alloying and centrifugal casting method, and the alloyed chemical composition was optimized by using the thermodynamic software Thermo-Calc. By using optical microscopy, transmission electron microscopy, scanning electron microscopy, and X-ray diffraction, the microstructure of the as-fabricated bainite ductile cast iron was characterized pertinent to the elements distribution in matrix and features of ferrite and retained austenite. The results of mechanical properties test show that the hardness and compressive strength of this alloyed ductile iron are 52 HRC and 2,200 MPa, respectively. The ascast bainite ductile iron possesses highly abrasive wear resistance and the reason can be ascribed to the solid solution of the elements Si, Ni, Cu, and Mn in the austenite and the formation of carbides of elements Cr and Mo. The strength of bainite ductile iron is increased by the acicular bainitic ferrite in the matrix. |
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来源
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Acta Metallurgica Sinica(English Letters)
,2014,27(3):476-482 【核心库】
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DOI
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10.1007/s40195-014-0067-x
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关键词
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Bainite ductile iron
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Alloying
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Microstructure
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Abrasive wear resistance
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地址
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1.
Northeastern University, State Key Laboratory of Rolling and Automation, Shenyang, 110819
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Northeastern University, Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Shenyang, 110819
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1006-7191 |
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学科
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金属学与金属工艺 |
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基金
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supported by the National High Technology Research and Development Program
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国家自然科学基金
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文献收藏号
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CSCD:5198098
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