Microstructure and high-temperature properties of Fe-Ti-Cr-Mo-B-C-Y2O3 laser cladding coating

被引：24
作者：
Zhang, Min [1 ]
Wang, Xinhong [2 ]
Liu, Shushuai [2 ]
Qu, Kaili [2 ]
机构：
[1] Shandong Univ, Sch Mech Engn, Jinan 250061, Peoples R China
[2] Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2020年 / 38卷 / 06期
关键词：
Laser composite coatings; Rare earth oxide; High-temperature oxidation resistance; High-temperature wear resistance; MECHANICAL-PROPERTIES; WEAR-RESISTANCE; COMPOSITE; EVOLUTION;
D O I：
10.1016/j.jre.2019.05.013
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Fe-based composite coatings were fabricated on 5CrNiMo die steel by laser beam melting a precursor mixture of ferrotitanium, ferrochromium, ferromolybdenum, B4C and Y2O3 powders. Microstructure and properties of the coatings were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometer (EDS), resistance furnace and high-temperature tribometer. The results show that (Ti,Mo)C particles with flower-like and (Ti,Mo)B-2 with block-like shapes are in situ formed during laser cladding. Volume faction of multiple ceramic particles increases with the increasing of Y2O3. The cumulative oxidation mass of the coating with 2 wt% Y2O3 is decreased by one-third than that of the coating without Y2O3. The oxidation layer of the coating with Y2O3 is getting smooth. Meanwhile, high temperature wear volume loss of the coating with 2 wt% Y2O3 is about 40% that of the coating without Y2O3. The coating with 2 wt% Y2O3 shows a smoother wear scar and few flat grooves are observed after high temperature wear test. (C) 2020 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
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页码：683 / 688
页数：6
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