Qu Dongdong, Gear Matthew, Gu Qinfen, Setargew Nega, Renshaw Wayne, McDonald Stuart, StJohn David, Nogita Kazuhiro
School of Mechanical and Mining Engineering, The University of Queensland, Brisbane 4072, Australia.
ARC Research Hub for Australian Steel Manufacturing, Wollongong 2522, Australia.
Materials (Basel). 2023 Jan 31;16(3):1211. doi: 10.3390/ma16031211.
Dross in a Zn-55wt%Al-1.6wt%Si metal coating bath is a mixture of bath metal and the quaternary intermetallic phase τ5c-AlFeSi(+Zn). Understanding the properties and formation of dross in a hot-dip Al-Zn galvanizing bath at the processing temperature (~600 °C) is critical for improving the production quality of steel sheet coating. However, dross analysis is usually conducted at room temperature with dross samples taken from the hot-dip bath and it is not known how representative these samples are of the phase(s) existing at high temperature. Using in-situ synchrotron X-ray diffraction (XRD), the crystal lattice and the coefficient of thermal expansion (CTE) of the intermetallic phase have been determined in the temperature range of 30 °C to 660 °C. Phase formation and phase stability of the intermetallic phase in the dross powder have been determined, providing fundamental knowledge for optimizing the production and quality of steel sheet coating.
在含55wt%铝和1.6wt%硅的锌金属镀浴中，浮渣是镀浴金属与四元金属间相τ5c-AlFeSi(+Zn)的混合物。了解热浸铝锌镀锌浴在加工温度（约600°C）下浮渣的性质和形成对于提高钢板涂层的生产质量至关重要。然而，浮渣分析通常在室温下进行，浮渣样品取自热浸浴，目前尚不清楚这些样品对高温下存在的相的代表性如何。利用原位同步辐射X射线衍射（XRD），在30°C至660°C的温度范围内测定了金属间相的晶格和热膨胀系数（CTE）。已确定了浮渣粉末中金属间相的相形成和相稳定性，为优化钢板涂层的生产和质量提供了基础知识。
