INTERMETALLIC PHASES FORMED DURING HOT DIPPING OF LOW-CARBON STEEL IN A ZN-5 PCT AL MELT AT 450-DEGREES-C
INTERMETALLIC PHASES FORMED DURING HOT DIPPING OF LOW-CARBON STEEL IN A ZN-5 PCT AL MELT AT 450-DEGREES-C
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DOI：
10.1007/bf02658042
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发表时间：
1992-09-01
期刊：
影响因子：
--
通讯作者：
SHARP, RM
中科院分区：
文献类型：
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作者：
CHEN, ZW;GREGORY, JT;SHARP, RM
用扫描电子显微镜、X射线衍射仪和能谱仪研究了低碳钢在450℃的Galfan镀液(5wt%Al-Zn+0.05%混合稀土)中热浸镀过程中金属间化合物相的形成和长大。第一个出现的金属间化合物相是以基材/熔体界面局部喷发的形式出现的；金属间化合物相随后形成了脱离的形态。金属间化合物爆出和破裂都是Fe2Al5-Znx和FeAl3-Znx的混合物，后者都离金属间化合物/衬底界面更远。初步确定该相主要为Fe2Al5-Znx相，并沿[001]择优生长方向生长到衬底中。剥离主要是FeAl_3-Zn_x，Fe_2Al_5-Zn_x只在界面附近出现。这两种金属间化合物的生长形态都可以用Fe(衬底)/Fe2Al5-Znx/FeAl3-Znx/Galfan(熔体)的反应路径来表征。
The formation and growth of intermetallic phases during hot dipping of low carbon steel in a Galfan bath (5 wt pct Al-Zn plus 0.05 pct mischmetal) at 450-degrees-C have been studied by using scanning electron microscopy, X-ray diffraction, and energy dispersive spectroscopy (EDS). The first intermetallic phase to appear was in the form of local outbursts at the substrate/melt interface; intermetallic phases subsequently developed a breakaway morphology. Both the intermetallic outbursts and the breakaway were found to be mixtures of Fe2Al5-Znx and FeAl3-Znx, the latter being in each case further away from the intermetallic/substrate interface. The initial outbursts were determined to be mainly Fe2Al5-Znx; this phase grew into the substrate with a [001] preferred growth direction. The breakaway was mainly FeAl3-Znx with Fe2Al5-Znx found only close to the interface. Both intermetallic growth morphologies can be characterized by a reaction path of Fe (substrate)/Fe2Al5-Znx/FeAl3-Znx/galfan (melt).