Transformation of Fe-Al phase to Fe-Zn phase on pure iron during galvanizing

被引：35

作者：

Adachi, Y ^{[1
]}

Arai, M ^{[1
]}

机构：

[1] Sumitomo Met Ind Ltd, Corp Res & Dev Labs, Amagasaki, Hyogo 660, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1998年 / 254卷 / 1-2期

关键词：

Fe-Zn intermetallics; galvanization; phase transformation;

D O I：

10.1016/S0921-5093(97)00840-X

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Focussing on a nucleation site of Fe-Zn intermetallics, phase transformation of Fe-Al intermetallics to Fe-Zn intermetallics in galvanized coatings are studied by combined ECP-SEM techniques. This study sheds new light on the effects of retained Fe-Al intermetallics on the orientation relationship of Fe-Zn intermetallics with respect to substrates. Pure iron substrates are galvanized using 0.20 mass%Al-bearing molten zinc bath. The parent high Al galvanized coatings are subsequently annealed using a molten salt bath kept at 430 degrees C, followed by water quenching. The Fe-Al phase formed during galvanizing shows no effect on the orientation relationship between a FeZn13(zeta) phase formed during galvannealing and an underlying substrate. Based on this result, and in conjunction with published reports by others, the nucleation mechanism of Fe-Zn intermetallics in high aluminum coatings is discussed. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：305 / 310

页数：6

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