Polynomial Description of the Fe–C–Si Stable Phase Diagram for up to 4.5 wt% Si, Including the Effect of Cr, Cu, Mn and P

IF 2.6 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING International Journal of Metalcasting Pub Date : 2024-08-15 DOI:10.1007/s40962-024-01428-z
Jon Sertucha, Jacques Lacaze, Anna Regordosa, Ramon Suarez
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Abstract

Knowledge of the relevant stable equilibrium phase diagram is a prerequisite for taking account of deviations from equilibrium when modeling the solidification of silicon cast irons. While a linear description is practical for silicon contents up to 3 wt%, the curvature of the austenite liquidus at higher silicon contents necessitates the use of second-order polynomials. This study was carried out with the aim of obtaining an accurate description up to 4.5 wt% silicon, representative of today’s emerging high-silicon cast irons. In addition, alloying with up to 1 wt% copper, 0.5 wt% manganese and 0.25 wt% chromium and phosphorus was considered. In parallel to a description of the liquidus of austenite and graphite, the austenite-liquid partition coefficients of all alloying elements have been described. This paves the way for future work aimed at providing an accurate description of microsegregation and other non-equilibrium phenomena occurring during the solidification of silicon cast irons.

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硅含量高达 4.5 wt% 的铁-碳-硅稳定相图的多项式描述,包括铬、铜、锰和磷的影响
了解相关的稳定平衡相图是建立硅铸铁凝固模型时考虑偏离平衡的先决条件。虽然线性描述适用于硅含量不超过 3 wt%的情况,但硅含量较高时奥氏体液面的曲率要求使用二阶多项式。本研究的目的是准确描述硅含量高达 4.5 wt%(代表当今新兴的高硅铸铁)时的情况。此外,还考虑了最高 1 wt%的铜、0.5 wt%的锰、0.25 wt%的铬和磷合金。在描述奥氏体和石墨液相的同时,还描述了所有合金元素的奥氏体-液体分配系数。这为今后旨在准确描述硅铸铁凝固过程中发生的微偏析和其他非平衡现象的工作铺平了道路。
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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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