Effect of Cr3C2 Grain Size on the Microstructure and Wear Performance of Fe-based Alloy Plasma Transferred Arc Surfacing

被引：0
|
作者：
Xiao Y. [1 ,2 ,3 ]
Xu C. [1 ]
Min R. [3 ]
Cao J. [1 ]
机构：
[1] School of Mechanical Engineering, Nantong Vocational University, Nantong
[2] School of Engineering Science, University of Science and Technology of China, Hefei
[3] Department of Metallurgical Engineering, Inha University, Incheon
来源：
Cailiao Daobao/Materials Review | 2018年 / 32卷 / 12期
关键词：
Cr[!sub]3[!/sub]C[!sub]2[!/sub; Fe50; alloy; Grain size; Microstructure; Plasma surfacing; Wear resistance;
D O I：
10.11896/j.issn.1005-023X.2018.24.022
中图分类号：
学科分类号：
摘要：
Plasma surfacing with Fe50 and composite plasma surfacing with 40% (mass fraction) micron and nano Cr3C2 (Fe50+40% micro/nano Cr3C2) were prepared by plasma surfacing on low carbon steel surface. Effect of Cr3C2 with different dia-meter on microstructure and wear properties of Fe50 alloy plasma surfacing were comparatively studied. The phase composition of the plasma surfacing was analyzed by X-ray diffractometry (XRD), the microstructure and micro-area composition observed by scanning electron microscopy (SEM) and energy depressive spectroscopy (EDS), the hardness distribution tested by microhardness tester, and the wear performance investigated respectively by a sliding wear tester and impact wear tester. The results indicate that the microstructure of Fe50 plasma surfacing is mainly composed of columnar crystal α-Fe and its network eutectic α-Fe+Cr23C6. The solidification mode of Fe+40% micro/nano Cr3C2 plasma surfacing is hypereutectic, which is composed of a large number of pre-eutectic carbides and fine and uniform dendrites and eutectic structures among them, with additional phases such as γ-Fe, Cr7C3 and unmel-ted Cr3C2; however, the Fe+40% nano-Cr3C2 coating precipitates more than the pre-eutectic carbide of Fe+40% micron Cr3C2 coating, which is, furthermore finer, and denser. Compared with Fe50 plasma surfacing coating, the microhardness, sliding wear performance and impact wear performance of Fe+40% micron Cr3C2 coating were increased by 21%, 1.5 times and 0.8 times, respectively; whereas the performances of Fe+40% nano Cr3C2 coating were increased by 34.1%, 2.4 times and 1.7 times respectively, whose furrow, spalling and plastic deformation were significantly reduced, while the wear resistance notably improved. © 2018, Materials Review Magazine. All right reserved.
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页码：4329 / 4333and4338
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共 15 条
  • [1] Deng D., Chen R., Zhang H., Et al., Present status and development tendency of plasma transferred arc welding, Journal of Mechanical Engineering, 49, 7, (2013)
  • [2] Huang Z., Hou Q., Wang P., Microstructure and properties of Cr<sub>3</sub>C<sub>2</sub>-modified nickel-based alloy coating deposited by plasma transferred arc process, Surface and Coatings Technology, 202, 13, (2008)
  • [3] Zhao C., Xing Z., Wang H., Et al., Advances in laser cladding on the surface of iron carbon alloy matrix, Materials Review A: Review Papers, 32, 2, (2018)
  • [4] Surzhenkov A., Antonov M., Goljandin D., Et al., High-temperature erosion of Fe-based coatings reinforced with cermet particles, Surface Engineering, 32, 8, (2016)
  • [5] Zong L., Microstructure and wear resistance of plasmaclad Fe-based hardfacing alloy, Journal of Shenyang University of Technology, 4, (2011)
  • [6] Li S., Liu S., Chen H., Et al., Wear resistance of PTAW deposited Ni-based WC composite coating, Surface Technology, 47, 2, (2018)
  • [7] Farahmand P., Kovacevic R., Corrosion and wear behavior of laser cladded Ni-WC coatings, Surface and Coatings Technology, 276, (2015)
  • [8] Fan L., Chen H., Liu S., Et al., Microstructure and tribological properties of Fe-based composite coatings reinforced by spherical WC particles using plasma transferred arc, Tribology, 38, 1, (2018)
  • [9] Luo Y., Xu Z., Li F., Et al., Effect of Cr<sub>3</sub>C<sub>2</sub> on microstructure and properties of the Co-based alloy coatings produced by plasma transferred arc weld-surfacing process, Journal of Anhui University of Technology, 31, 1, (2014)
  • [10] Bai Y., Xing L., Li X., Et al., Effect of neutral salt spray corrosion on tribological properties of SPSed NiCr-Cr<sub>3</sub>C<sub>2</sub> coatings, Rare Metal Materials and Engineering, 46, 5, (2017)
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