Influence of Feedstock Materials and Spray Parameters on Thermal Conductivity of Wire-Arc-Sprayed Coatings
Influence of Feedstock Materials and Spray Parameters on Thermal Conductivity of Wire-Arc-Sprayed Coatings
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DOI：
10.1007/s11665-017-2567-0
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发表时间：
2017-03-01
影响因子：
2.3
通讯作者：
Konigstein, T.
中科院分区：
文献类型：
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作者：
Yao, H. H.;Zhou, Z.;Konigstein, T.
为了在造纸机烘缸上制备高导热系数的防护涂层，研制了一种FeCrB粉芯丝材，并对电弧喷涂工艺参数进行了优化。在相同的实验条件下制备了常规工程材料FeCrAl和FeCrMo涂层作为参考涂层。结果表明，涂层中的氧化物含量对涂层的导热系数有显著影响。与传统的FeCrAl和FeCrMo涂层相比，FeCrB涂层由于较低的氧化物含量而表现出相对较高的热导率。此外，通过减小喷涂距离可以减少飞行中颗粒的氧化，从而有助于提高涂层的热导率。如果涂布到干燥部的涂料具有高导热性，则可以显著降低造纸机的总能耗。因此，在这项研究中开发的FeCrB涂层是一个非常有前途的涂层系统烘缸的改善导热性和低运营成本的造纸工业。
To manufacture a protective coating with high thermal conductivity on drying cylinders in paper production machines, a FeCrB-cored wire was developed, and the spraying parameters for wire-arc spraying were optimized in this study. The conventional engineering materials FeCrAl and FeCrMo coatings were produced as the reference coatings under the same experimental condition. It has been shown that the oxide content in coating influences the thermal conductivity of coating significantly. The FeCrB coating exhibits a relative higher thermal conductivity due to the lower oxide content in comparison with conventional FeCrAl and FeCrMo coatings. Moreover, the oxidation of in-flight particles can be reduced by decreasing the standoff distance contributing to the increase in the thermal conductivity of coating. Total energy consumption of a papermaking machine can be significantly reduced if the coatings applied to dryer section exhibit high thermal conductivity. Therefore, the FeCrB coating developed in this study is a highly promising coating system for drying cylinders regarding the improved thermal conductivity and low operation costs in paper production industry.