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Journal of Materials Engineering >

2020 , Vol. 48 >Issue 7: 111 - 118

DOI: https://doi.org/10.11868/j.issn.1001-4381.2019.000724

Research Article

Microstructure and mechanical properties of in -situ TiB reinforced Ti-based composite coating by induction cladding

  • Meng-qing ZHANG 1 ,
  • He-long YU , 1, * ,
  • Hong-mei WANG 1 ,
  • Yan-li YIN 1 ,
  • Min WEI 2 ,
  • Yu-lin QIAO 3 ,
  • Wei ZHANG 2 ,
  • Bin-shi XU 1
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  • 1 National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China
  • 2 Hebei Jingjinji Institute of Remanufacturing Industry & Technology, Hejian 062450, Hebei, China
  • 3 National Engineering Research Center for Mechanical Product Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China

Received date: 2019-08-06

  Online published: 2020-07-21

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All rights reserved, without authorization
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Abstract

Induction cladding TiB/Ti composite coating was in-situ synthesized by induction heating the preplaced powder mixture of 90% Ti (atom fraction, the same below) and 10% boron on a Ti6Al4V substrate. The microstructure, phase composition and micro/nano mechanical properties of the coating were studied by scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD), microhardness tester and nanoindentation tester. The results indicate that the composite coating has a smooth surface and a dense microstructure without cracks and pores. A strong metallurgical adherence is formed between the coating and the substrate. During induction cladding process, B and Ti are fully reacted to in-situ form TiB reinforcements. The matrix of the coating consists of α-Ti phase and a few β-Ti phases. The reinforcements of in-situ synthesized TiB are uniformly distributed in the coating with a volume fraction about of 9.4%. Indentation hardness and modulus of the in-situ TiB particles are about 35 GPa and 545 GPa, respectively, which cause the increase of the microhardness of the composite coating to about 525HV0.2. It is increased by 67% as against the Ti6Al4V substrate.

Key words： induction cladding; TiB; in-situ synthesis; Ti matrix composite coating; mechanical property

Cite this article

Meng-qing ZHANG , He-long YU , Hong-mei WANG , Yan-li YIN , Min WEI , Yu-lin QIAO , Wei ZHANG , Bin-shi XU . Microstructure and mechanical properties of in -situ TiB reinforced Ti-based composite coating by induction cladding[J]. Journal of Materials Engineering, 2020 , 48(7) : 111 -118 . DOI: 10.11868/j.issn.1001-4381.2019.000724

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