Microstructure and high-temperature properties of Fe-Ti-Cr-Mo-B-C-Y2O3 laser cladding coating
来源期刊：Journal of Rare Earths2020年第6期
论文作者：Min Zhang Xinhong Wang Shushuai Liu Kaili Qu
文章页码：683 - 688
摘 要：Fe-based composite coatings were fabricated on 5 CrNiMo die steel by laser beam melting a precursor mixture of ferrotitanium,ferrochromium,ferromolybdenum,B4 C and Y2 O3 powders.Micro structure 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）B2 with block-like shapes are in situ formed during laser cladding.Volume faction of multiple ceramic particles increases with the increasing of Y2 O3.The cumulative oxidation mass of the coating with 2 wt% Y2 O3 is decreased by one-third than that of the coating without Y2 O3.The oxidation layer of the coating with Y2 O3 is getting smooth.Meanwhile,high temperature wear volume loss of the coating with 2 wt% Y2 O3 is about 40% that of the coating without Y2 O3.The coating with 2 wt% Y2 O3 shows a smoother wear scar and few flat grooves are observed after high temperature wear test.
Min Zhang1，Xinhong Wang2，Shushuai Liu2，Kaili Qu2
1. School of Mechanical Engineering,Shandong University2. School of Materials Science and Engineering,Shandong University
摘 要：Fe-based composite coatings were fabricated on 5 CrNiMo die steel by laser beam melting a precursor mixture of ferrotitanium,ferrochromium,ferromolybdenum,B4 C and Y2 O3 powders.Micro structure 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）B2 with block-like shapes are in situ formed during laser cladding.Volume faction of multiple ceramic particles increases with the increasing of Y2 O3.The cumulative oxidation mass of the coating with 2 wt% Y2 O3 is decreased by one-third than that of the coating without Y2 O3.The oxidation layer of the coating with Y2 O3 is getting smooth.Meanwhile,high temperature wear volume loss of the coating with 2 wt% Y2 O3 is about 40% that of the coating without Y2 O3.The coating with 2 wt% Y2 O3 shows a smoother wear scar and few flat grooves are observed after high temperature wear test.
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