Study on Microstructure and Mechanical Properties of A100-Y2O3 Coatings on Low-Carbon Steel by Laser Cladding
Author:
Zhou Kexin12, Han Tengfei123, Zhu Xinghui4, Chen Zhongyu3, Zhou Chao5, Cao Hanbo3, Shen Yifu1ORCID
Affiliation:
1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics (NUAA), Nanjing 210016, China 2. State-Owned Wuhu Machinery Factory, Wuhu 241007, China 3. College of Mechanical Engineering, Nanjing Vocational University of Industry Technology, Nanjing 210023, China 4. China Special Equipment Inspection & Research Institute, Beijing 100029, China 5. College of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
Abstract
To enhance the microhardness and wear resistance of low-carbon steel, laser cladding was employed to create A100-Y2O3 cladding coatings that remained free of cracks. The phase composition, microstructure, and element distribution of these coatings were examined using XRD and SEM analyses, respectively. The microhardness and wear resistance of the A100-Y2O3 cladding coatings were tested by an HXS-1000 A type digital liquid crystal intelligent microhardness tester and an ML-10 friction and wear tester, respectively. The XRD results show that the addition of Y2O3 did not change the phase composition of the A100-Y2O3 cladding coatings. With the addition of Y2O3, the grains of the A100-Y2O3 cladding coatings are finer compared with those of the A100-0%Y2O3 cladding coating. The upper part of the A100-Y2O3 cladding coatings were composed of fine equiaxed grains. The average microhardness of the A100-0%Y2O3 cladding coatings was 532.489 HV. With the addition of Y2O3, the microhardness of the A100-Y2O3 cladding coatings was obviously improved, and the average microhardness of A100-1.5%Y2O3 coating reached 617.290 HV. The A100-Y2O3 cladding coatings were reduced, and the worn surface became relatively smooth owing to the addition of Y2O3. The addition of Y2O3 significantly improved the wear resistance of the A100-Y2O3 cladding coatings.
Funder
Project of Talent Introduction and Scientific Research Start-Up Fund of Nanjing Vocational University of Industry Technology Jiangsu Province Industrial Sensing and Intelligent Manufacturing Equipment Engineering Research Center Open Fund Project
Subject
Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces
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