添加铈对球墨铸铁微观结构和机械性能的影响

IF 1.9 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING
Zhongyan Xie, Yubao Liu, Ying Ren, Lifeng Zhang
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引用次数: 0

摘要

研究了添加铈对球墨铸铁微观结构和性能的影响。通过添加铈铁,获得了铈含量为 10-750 ppm 的球墨铸铁样品。在铈含量为 60ppm 的球墨铸铁中,石墨的数量和球化率最高。球墨铸铁的抗拉强度为 488 兆帕,伸长率达到 20.17%。对于韧性要求较高的球墨铸铁,有必要在球墨铸铁中添加 60 ppm Ce,以提高石墨的数量密度和球化率。CeS 包裹体的形成可有效促进石墨的异质成核,增加石墨的数量。共晶过程中较强的碳扩散会增加球墨铸铁中铁素体的形成,从而导致较低的抗拉强度和较高的伸长率。当铈含量超过 460 ppm 时,析出的 Ce2C3 会显著降低球墨铸铁的性能。
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 Cerium Addition on Microstructure and Mechanical Properties of the Ductile Iron
The effect of the cerium addition on the microstructure and properties of the ductile iron is investigated. The ferrocerium is added to obtain ductile iron samples with cerium contents of 10–750 ppm. In the ductile iron with a cerium content of 60 ppm, the amount and the spheroidization rate of graphites are the highest. The tensile strength of the ductile iron is 488 MPa and the elongation rate reaches 20.17%. For the ductile iron with a high toughness demand, it is necessary to add 60 ppm Ce in the ductile iron to increase the number density and spheroidization rate of graphites. The formation of CeS inclusions effectively promotes the heterogeneous nucleation of graphites, increasing the amount of graphites. The stronger carbon diffusion during the eutectic process increases the ferrite formation in the ductile iron, leading to a lower tensile strength and a higher elongation rate. When the cerium content exceeds 460 ppm, the precipitated Ce2C3 significantly reduces the performance of the ductile iron.
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来源期刊
steel research international
steel research international 工程技术-冶金工程
CiteScore
3.30
自引率
18.20%
发文量
319
审稿时长
1.9 months
期刊介绍: steel research international is a journal providing a forum for the publication of high-quality manuscripts in areas ranging from process metallurgy and metal forming to materials engineering as well as process control and testing. The emphasis is on steel and on materials involved in steelmaking and the processing of steel, such as refractories and slags. steel research international welcomes manuscripts describing basic scientific research as well as industrial research. The journal received a further increased, record-high Impact Factor of 1.522 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). The journal was formerly well known as "Archiv für das Eisenhüttenwesen" and "steel research"; with effect from January 1, 2006, the former "Scandinavian Journal of Metallurgy" merged with Steel Research International. Hot Topics: -Steels for Automotive Applications -High-strength Steels -Sustainable steelmaking -Interstitially Alloyed Steels -Electromagnetic Processing of Metals -High Speed Forming
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