New Development of Transient Liquid Insert Metal Diffusion Bonding Using Alloying Powder

概要

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This study developed a new Transient Liquid Insert Metal Diffusion Bonding (TLIM-bonding) technique using alloying powder whose chemical compositions were similar to those of base metal. The base metals used were commercial Ni-base superalloys such as MM007, MarM247 and Inconel 713C alloys. They were bonded with both a Ni-15% Cr-4%B amorphous insert metal and an IN100 alloying powder sheet with a thickness of about 250 μm. In the case of a MM007 alloy, the times required for completion of the isothermal solidification and the sequent homogenizing process were about 0.6 ks and 86.4 ks at 1423 K, respectively using this technique even with a bonding clearance of about 100 /μm. The former time was about 1/80 and the latter time was about 1/30 compared to times obtained by a conventional TLIM bonding. Such short period of the homogenizing process may be due to elements diffusing from alloying powder to inter-powder region by three-dimensional diffusion process. Tensile strengths of MM007. MarM247 and Inconel 713Cjoints at a testing temperature of 1255 K were almost equal to those of each base metal. The experimental results indicate that it is useful to insert alloying powder into a wide bonding clearance joint during the TLIM-bonding in fabrication.
社団法人溶接学会の論文
1992-10-01