奥氏体化时间对奥氏体回火球墨铸铁耐腐蚀性和耐磨性的影响

IF 2.6 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING
F. Montes González, A. Magaña Hernández, A. Miranda Pérez, E. Almanza Casas, S. Luna Alvarez, F. García Vazquez
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引用次数: 0

摘要

在球墨铸铁的奥氏体化热处理过程中,奥氏体化的温度和时间具有非常重要的实际意义,因为这些因素会影响固态的转变,改变基体的微观结构以及随后奥氏体化后材料的机械性能。本研究的目的是调查奥氏体化时间对球墨铸铁微观结构特征、磨损和腐蚀速率的影响,球墨铸铁在 1050 ℃ 下进行奥氏体化热处理 120、180 和 240 分钟,然后在 350 ℃ 下进行奥氏体回火 60 分钟。为了评估样品的耐腐蚀性和耐磨性,分别在 3.5% 的氯化钠溶液中进行了电位测试,并进行了针盘摩擦学测试。结果表明,增加奥氏体化时间会产生富碳奥氏体含量更高的奥氏体微观结构,同时碳含量也更高,而且由于球墨铸铁中最后冻结区的存在,微观结构异质性较低。随着奥氏体化时间的延长,材料的耐腐蚀性和耐磨性也得到了改善。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effect of Austenitization Time on Corrosion and Wear Resistance in Austempered Ductile Iron

Effect of Austenitization Time on Corrosion and Wear Resistance in Austempered Ductile Iron

The temperature and time of austenitization are of great practical importance during the austempering heat treatment of ductile iron, as these factors influence the transformations in the solid state, modifying the matrix microstructure and the resulting mechanical properties of the material obtained after subsequent austempering. The objective of this research is to investigate the influence of austenitization time on the microstructural characteristics, wear, and corrosion rate of ductile iron subjected to an austenitization heat treatment at 1050 °C for 120, 180, and 240 min, followed by austempering at 350 °C for 60 min. To assess the corrosion and wear resistance of the samples, potentiodynamic tests in a 3.5% NaCl solution and pin-on-disk tribological tests were, respectively, conducted. The results demonstrated that increasing the austenitization time results in ausferritic microstructures with a higher content of carbon-rich austenite accompanied by a higher content of carbon, and lower microstructural heterogeneities due to the last to freeze zones in ductile iron. The material's corrosion and wear resistance improved as the austenitization time was increased.

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来源期刊
International Journal of Metalcasting
International Journal of Metalcasting 工程技术-冶金工程
CiteScore
4.20
自引率
42.30%
发文量
174
审稿时长
>12 weeks
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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