The Fe-Cr-Zn system in relation with the galvanizing process in chromium-added zinc bath

被引：15

作者：

Reumont, G ^{[1
]}

Mathon, M ^{[1
]}

Fourmentin, R ^{[1
]}

Perrot, P ^{[1
]}

机构：

[1] Univ Lille 1, CNRS, UMR 8517, Lab Met Phys & Genie Mat, F-59655 Villeneuve Dascq, France

来源：

ZEITSCHRIFT FUR METALLKUNDE | 2003年 / 94卷 / 04期

关键词：

thermodynamtics modeling; galvanizing process; solidification; Fe-Cr-Zn system;

D O I：

10.3139/146.030411

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Taking into account new experimental measurements, the Fe-Zn-Cr ternary system is critically modified at 460 degreesC. A continuous solid solution between zeta-FeZn13 and CrZn13 compounds is shown but is shared at 460 degreesC by the stable CrZn17 compound containing about 2 wt.% Fe. This ternary system is assessed with the CALPHAD method using the PARROT modulus of the Thermo-Calc software. The liquid and solid solution phases are modeled with Redlich-Kister-Muggianu equations. The intermetallic compounds zeta-(Fe,Cr)Zn-13 and CrZn17 are treated as stoichiometric compounds in the binary systems. The experimental Fe and Cr solubilities at various temperatures modify the shape of the liquidus curve and are satisfying for industrial applications. A set of parameters consistent with most of the available experimental data on both phase diagram and solubility measurements is obtained by optimization. A comparison with previous experimental work is also presented and a reactional model between iron substrate and Zn-Cr bath is proposed. This optimization allows to interpret the growth of intermetallic layers and the formation of dross when galvanizing in Cr-added Zn bath.

引用

页码：411 / 418

页数：8

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