THE EFFECT OF STEEL CHEMISTRY ON THE FORMATION OF FE-ZN INTERMETALLIC COMPOUNDS OF GALVANNEAL-COATED STEEL SHEETS

被引:49
作者
LIN, CS [1 ]
MESHII, M [1 ]
机构
[1] NORTHWESTERN UNIV, DEPT MAT SCI & ENGN, EVANSTON, IL 60208 USA
来源
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 1994年 / 25卷 / 05期
关键词
D O I
10.1007/BF02655180
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effects of steel chemistry on the formation of Fe-Zn intermetallic compounds in the galvanneal coatings have been investigated by examining the microstructure of galvanneal coat ings on extra-low-carbon (ELC) steel, interstitial-free (IF) steel, and interstitial-free rephosphorized (IFP) steel. The layer structure of the coatings was revealed by chemical etching. Phases present in each layer were then identified using electron diffraction in transmission electron microscopy (TEM). A two-layer structure one consisting of the delta phase with a small fraction of the zeta phase dispersed on the surface and Gamma phases and another consisting of the delta and Gamma(1) phases, was observed in the ELC sample and the IFP sample, respectively. A three-layer structure consisting of the delta, Gamma(1) + delta, and Gamma phases was observed in the IF sample. The presence of C in the steel substrate retarded the alloying between Fe and Zn; while P in the steel favored the formation of the Gamma(1) phase over the Gamma phase by its surface segregation in the steel substrate. The orientation relationship between coating and substrate was also studied by electron diffraction. Three alpha-Fe/Gamma orientation relationships were frequently observed.
引用
收藏
页码:721 / 730
页数:10
相关论文
共 31 条
[1]  
ABE M, 1983, T IRON STEEL I JPN, V23, pB60
[2]  
BONNER K, 1992, CH1J136 INL STEEL CO
[3]  
BORZILLO AR, 1969, T ASM, V62, P729
[4]  
Cheng C.W., 1992, GALVATECH 92 AMSTERD, V92, P122
[5]  
DREWIEN CA, 1990, P TMS S ZINC BASED S, P31
[6]  
GHONIEM MA, 1972, METALL, V26, P1026
[7]   REACTION MECHANISMS FOR COATINGS FORMED DURING HOT DIPPING OF IRON IN 0 TO 10 PCT AL-ZN BATHS AT 450 DEGREES TO 700 DEGREES C [J].
GHUMAN, ARP ;
GOLDSTEIN, JI .
METALLURGICAL TRANSACTIONS, 1971, 2 (10) :2903-+
[8]  
GIANNAZZI LA, 1992, GALVATECH 92 AMSTERD, P461
[9]  
INAGAKI JI, 1982, T IRON STEEL I JPN, V22, pB130
[10]  
JAGANNATHAN V, 1992, GALVATECH 92, P127