In situ synthesis of TiB₂/Fe composite coating by laser cladding

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• 作者：Baoshuai Du ; Zengda Zou ; Xinhong Wang ; Shiyao Qu
• 关键词：In situ ; TiB₂/Fe composite coating ; Laser cladding ; Microstructure
• 刊名：Materials Letters
• 出版年：2008
• 出版时间：29 February 2008
• 年：2008
• 卷：62
• 期：4-5
• 页码：689-691
• 全文大小：380 K

文摘

In situ synthesized TiB₂ reinforced Fe based coating was fabricated by laser cladding on steel substrate using cheaper Fe–Ti alloy, Fe–B alloy and Fe as the precursor powders. The phase composition and microstructure of the clad layer were investigated by means of X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). Results showed that uniformly distributed TiB₂ particles with the hexagonal shape could be synthesized by the in situ reaction. The hardness and wear properties of the clad layer were greatly improved due to the presence of TiB₂ particles in comparison with the substrate.