Microstructure and high-temperature properties of Fe-Ti-Cr-Mo-B-C-Y_2O_3 laser cladding coating |
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| Affiliation: | 1. School of Mechanical Engineering, Shandong University, Jinan 250061, China;2. School of Materials Science and Engineering, Shandong University, Jinan 250061, China;1. School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China;2. School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan 250101, Shandong, China;3. School of Material Science and Engineering, Shandong University, Jinan 250061, China;4. Institute for Superconducting and Electronic Materials Australian Institute of Innovative Materials, The University of Wollongong, AIIM Facility (Building 231), Innovation Campus, Squires Way, North Wollongong, NSW 2500, Australia;1. School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China;2. School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China;3. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, 541004, PR China |
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| Abstract: | 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 Y_2 O_3 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)B_2 with block-like shapes are in situ formed during laser cladding.Volume faction of multiple ceramic particles increases with the increasing of Y_2 O_3.The cumulative oxidation mass of the coating with 2 wt% Y_2 O_3 is decreased by one-third than that of the coating without Y_2 O_3.The oxidation layer of the coating with Y_2 O_3 is getting smooth.Meanwhile,high temperature wear volume loss of the coating with 2 wt% Y_2 O_3 is about 40% that of the coating without Y_2 O_3.The coating with 2 wt% Y_2 O_3 shows a smoother wear scar and few flat grooves are observed after high temperature wear test. |
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| Keywords: | Laser composite coatings Rare earth oxide High-temperature oxidation resistance High-temperature wear resistance |
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