3Al/Cr3C2, microstructure, M7C3, wear;resistance"/> 3Al alloy and Ni3Al/Cr3C2 composites were prepared on 304 stainless steel substrate by laser cladding technique. The microstructure, hardness and wear resistance of Ni3Al alloy and Ni3Al/Cr3C2 composites were investigated. The results show that the microstructure of the cladding layer of Ni3Al/Cr3C2 consists of matrix γ-Ni3Al phase and in-situ self-generated M7C3 (M=Cr,Fe) type carbides, and the fine near-circular M7C3 is dispersed in γ- Ni3Al matrix. Compared with the Ni3Al alloy cladding layer, the micro-hardness of the Ni3Al/Cr3C2 composites cladding layer is increased by 2.5 times, and the weight loss is only 28% of the vermicular graphite cast iron. Therefore, the laser cladding Ni3Al/Cr3C2 composite cladding layer has good wear resistance."/>

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Study on Wear Resistance of Laser Cladding Ni3Al/Cr3C2 Composites
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1.School of material science and technology,Hebei University of Technology;2.Central Iron and Steel Research Institute

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    Abstract:

    The wear resistant coatings of Ni3Al alloy and Ni3Al/Cr3C2 composites were prepared on 304 stainless steel substrate by laser cladding technique. The microstructure, hardness and wear resistance of Ni3Al alloy and Ni3Al/Cr3C2 composites were investigated. The results show that the microstructure of the cladding layer of Ni3Al/Cr3C2 consists of matrix γ"-Ni3Al phase and in-situ self-generated M7C3 (M=Cr,Fe) type carbides, and the fine near-circular M7C3 is dispersed in γ"- Ni3Al matrix. Compared with the Ni3Al alloy cladding layer, the micro-hardness of the Ni3Al/Cr3C2 composites cladding layer is increased by 2.5 times, and the weight loss is only 28% of the vermicular graphite cast iron. Therefore, the laser cladding Ni3Al/Cr3C2 composite cladding layer has good wear resistance.

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[Chen Cuixin, Zhao Xiangdong, Zhao Lin, Han Wei, Peng Yun, Yin Fuxing, Tian Zhiling. Study on Wear Resistance of Laser Cladding Ni3Al/Cr3C2 Composites[J]. Rare Metal Materials and Engineering,2020,49(4):1388~1394.]
DOI：10.12442/j. issn.1002-185X.20190012

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History
  • Received:January 04,2019
  • Revised:March 20,2019
  • Adopted:April 10,2019
  • Online: May 07,2020
  • Published: