Erosion studies of cermet-coated ASTM A36 steel
Erosion studies of cermet-coated ASTM A36 steel
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DOI：
10.1108/ilt-01-2018-0001
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发表时间：
2019-03
影响因子：
1.6
通讯作者：
Vineet Shibe;V. Chawla
中科院分区：
文献类型：
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作者：
Vineet Shibe;V. Chawla
本文旨在对模拟燃煤锅炉工况下的固体颗粒侵蚀进行研究，比较两种不同爆轰枪（D-Gun）喷射金属陶瓷涂层粉末WC-12%Co和Cr3C2-25%NiCr对ASTM A36钢和裸（未涂层）ASTM A36钢的侵蚀行为。设计/方法/方法：在45°、60°和90°的冲击角下，使用空气射流侵蚀试验台进行侵蚀研究。在侵蚀研究过程中，利用光学剖面仪测定了以体积损失（mm3/g）为单位的侵蚀速率和侵蚀剖面的测量值。两种金属陶瓷涂层都成功地保护了ASTM A36钢在45°，60°和90°的冲击角下免受侵蚀。在ASTM A36裸钢的情况下，冲蚀速率在45°冲蚀角时最大，在90°冲蚀角时最小，从而描绘了韧性材料的特殊冲蚀行为。WC-12%Co涂层试样表现出更接近延性材料的侵蚀行为。Cr3C2-25%NiCr涂层试样在冲击角为90°时的冲蚀速率最大，在45°时的冲蚀速率最小，呈现出典型的脆性材料行为。应用D-Gun喷涂WC-12%Co和Cr3C2-25%NiCr合金涂层，可望提高引风机的抗冲蚀性能。原创性/价值本文评价了ASTM A36钢裸钢和涂覆金属陶瓷的固体颗粒侵蚀性能，这将有助于引风机应用中选择合适的金属陶瓷涂层。
PurposeThis paper aims to perform the solid particle erosion studies in simulated coal-fired boiler conditions with a view to compare the erosion behavior of two different types of detonation gun (D-Gun) sprayed cermet coating powders, that is, WC-12%Co and Cr3C2-25%NiCr on ASTM A36 steel and bare (uncoated) ASTM A36 steel.Design/methodology/approachErosion studies were performed using an air jet erosion test rig at impingement angles of 45°, 60° and 90°. During the erosion studies weight loss, erosion rates in terms of volume loss (mm3/g) and measurement of erosion profiles were determined using optical profilometer.FindingsBoth cermet coatings had successfully protected the ASTM A36 steel from erosion at impingement angles of 45°, 60° and 90°. In the case of bare ASTM A36 steel, the erosion rates were maximal at an impingement angle of 45° and minimal at an impingement angle of 90°, thus depicting the peculiar erosion behavior of ductile materials. WC-12%Co coated specimens exhibited erosion behavior that is closer to the behavior of ductile materials. Cr3C2-25%NiCr coated specimens exhibited the maximum erosion rate at an impingement angle of 90° and minimum at an impingement angle of 45°, hence depicting the typical behavior of brittle materials.Practical implicationsIt is expected that these results will contribute to the improvement of erosion resistance of induced draft fans, by the application of D-Gun sprayed WC-12%Co and Cr3C2-25%NiCr cermet coatings.Originality/valueThis paper evaluates the solid particle erosion behavior of bare and cermet-coated ASTM A36 steel which will be helpful in choosing the suitable cermet coating for induced draft fan applications.