The Microstructure of Ni-Based Surface Infiltrated Layer on Cast Steel Substrate

Abstract:

The Ni-based alloying powder was successfully used as the raw materials for fabricating surface infiltrated layers on cast steel ZG45 substrate through a vacuum infiltration casting technique (VICT). The microstructures of surface Ni-based infiltrated layer, the micro-hardness distribution are investigated. The infiltrated layer includes three areas that are surface part-melting area, melting completely fusion area and diffusion solid solution area. The main composition of surface infiltrated layer was intermetallic compound Cr₂B，NiB and solid solution. The main phase of transition layer was solid solution. The micro-hardness of Ni-based infiltrated layer presented gradient change from surface infiltrated layer to substrate. The average micro-hardness was about 550HV.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 1133-1136
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.1133
• Online since: October 2011
• Authors: Gui Rong Yang, Wen Ming Song, Ying Ma, Yuan Hao
• Keywords: Microhardness, Microstructure, Ni-Based Infiltrated Layer, Vacuum Infiltration Casting, ZG45

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