Abstract：Different boron content and vanadium content were added to a new Fe- Cr- C system surfacing powder core, and deposited layer on Q235 substrate was prepared under the condition of nitrogen as the main protective gas. The microstructure of the deposited layer was observed by metallographic microscope, and the hardness of the sample after melting was measured and analyzed. The results showed the precipitation of hard nitrides, the hardness of cladding layer was further increased after adding boron. With the increase of boron content, the number of hard phase gradually increased. The precipitation was finer and more uniform distribution, with the content of vanadium increased, the change of the number of precipitated phase and the change of hardness is not obvious.
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2018, Vol. 25 
