Diffusion bonding of Al2O3-TiC composite ceramic and W18Cr4V high speed steel in vacuum
作者： Xiaoqin Shen , Li Yajiang , Wang Juan , Huang Wanqun , Yu Fusheng
DOI: 10.1016/J.VACUUM.2009.07.012
关键词: Diffusion 、 Diffusion bonding 、 High-speed steel 、 Optical microscope 、 Metallurgy 、 Scanning electron microscope 、 Composite material 、 Materials science 、 Microstructure 、 Indentation hardness 、 Solid solution
摘要: Abstract Al2O3-TiC composite ceramic and W18Cr4V high speed steel were joined by diffusion bonding with a Ti-Cu-Ti multi-interlayer in vacuum of 10−4–10−5 Pa. The interfacial microstructures the Al2O3-TiC/W18Cr4V joint investigated optical microscope scanning electron microscopy. elemental concentration near interface was evaluated probe microanalysis. The results indicate that an obvious transition zone formed between during bonding. elements are mainly Ti Cu small amount Fe. Element concentrates two interfaces Al2O3-TiC/transition zone/W18Cr4V. microhardness is lower than higher W18Cr4V. formation process consists five stages: (i) Formation Cu-Ti liquid phase; (ii) Full melt Cu; (iii) Ti; (iv) reaction layer; (v) solid solution increment layer.
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