Effect of Temperature on Microstructure and Formability of Al-10 mass%Si Coatings
查看参考文献18篇
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文摘
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The type-1 aluminized(Al-10 mass%Si)coating on hot stamped steel is used in commercial applications. The effect of temperature on microstructure and formability of the Al-10 mass%Si coating was investigated.Hot-dip aluminized 22MnB5 steel was heated at 870,900,930,and 1 050℃ for 5 min.After heat treatment at different temperatures,the microstructure of Al-10 mass%Si was characterized by field-emission scanning electron microscopy and energy-dispersive spectroscopy.The results show that when the Al-10 mass%Si coating was heated at 870℃ for 5 min,three types of intermetallic phases were formed:two ternary Fe-Si-Al phases(Fe_2SiAl_7+Fe_2Si_2Al_5 and Fe_2SiAl_2+Fe_2Si_2Al_5)and one binary Fe-Al phase(FeAl_3).The phases in the coating became Fe_2SiAl_2+Fe_2Si_2Al_5 and FeAl_3,the binary Fe-Al phase near the interface became Fe_2Al_5 and the Si-rich layers were decreased with the increase of heating temperature.When the heat treatment was 1 050℃ for 5 min,the Si-rich layer disappeared,the coating consisted of FeAl and Fe_3Al,and the Kirkendall voids were formed.When the heating temperature was increased through 870,900,and 930℃, the coating hardness was reduced and cracks were formed in the coating after hot stamping.The formability of the coating with temperature change was confirmed by a hot stamping test.When heated at 1 050℃, the coating was formable but continuous Kirkendall voids were observed. |
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来源
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Journal of Iron and Steel Research
, International,2016,23(3):270-275 【核心库】
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DOI
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10.1016/s1006-706x(16)30044-9
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关键词
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Al-Si coating
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heating temperature
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microstructure
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formability
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hot-stamping
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地址
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1.
Central Iron and Steel Research Institute, National Engineering Laboratory Advanced Coating Technology for Metals, Beijing, 100081
2.
School of Materials and Metallurgy,Northeastern University, Liaoning, Shenyang, 110004
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1006-706X |
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学科
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冶金工业 |
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文献收藏号
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CSCD:5660280
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