Laser & Optoelectronics Progress, Volume. 59, Issue 19, 1916003(2022)
Microstructure and Properties of 35.8%Fe-20%Ti-20%Al-24%Cr- 0.2%Y2O3 Coatings Prepared by Laser Cladding
The alloy coating with mass fraction of 35.8%Fe-20%Ti-20%Al-24%Cr-0.2%Y2O3 was fabricated on the surface of 304 stainless steel by laser cladding process. The microstructures, elemental distributions, and mechanical properties of the coating were characterized. The results show that under the conditions of laser power of 2200 W, scanning velocity of 5 mm/s, and overlapping rate of 50%, the obtained coating has a uniform and dense structure without defects such as cracks and pores. There is a metallurgical bond between the coating and the substrate, and the dilution rate is 7.31%. Phase compositions of the coating are mainly (Fe,Cr)Al, Y2TiO7, and TiO2. The average grain size is less than 6.7 μm. As a result, the coating has high hardness and good high temperature wear resistance, the hardness reaches 550 HV (the substrate is 210 HV). The mass loss rate of wear test at 400 ℃ is only 3.67% of that of 304 stainless steel.
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Hongyi Jiang, Xinyi Zhao, Tianqing Li, Qiang Zhu, Dan Wang, Yucheng Lei. Microstructure and Properties of 35.8%Fe-20%Ti-20%Al-24%Cr- 0.2%Y2O3 Coatings Prepared by Laser Cladding[J]. Laser & Optoelectronics Progress, 2022, 59(19): 1916003
Category: Materials
Received: Aug. 24, 2021
Accepted: Sep. 29, 2021
Published Online: Oct. 12, 2022
The Author Email: Zhao Xinyi (zhaoxinyi21@126.com), Lei Yucheng (yclei@ujs.edu.cn)