Electron beam welding method of adding transition layer into compound between metals of titanium aluminium alloy

Abstract

An electronic beam welding method of Ti-Al alloy by adding transmission layer to generate intermetallic compound includes thermally treating the Ti-Al alloy to be welded for eliminating stress, chemically and physically cleaning the surfaces of TiAl alloy and metallic foil, filling the metallic foil in the seam to be welded, preheating by electronic beam, microalloying by electronic beam, and natural cooling.

Description

Technical field:

[0001] The invention relates to the technical field of welding of titanium-aluminum alloy intermetallic compounds. Background technique:

[0002] The metal bonds and covalent bonds in the existing titanium-aluminum (TiAl) alloy crystals coexist, so that it has both the strength of metal and the high-temperature performance of ceramics, and thus produces high specific strength, specific modulus, and good oxidation resistance. , creep resistance, etc. These advantages make it a good application prospect as a heat-resistant structural material for aero-engines and automobiles. The successful application of such alloys to actual production will inevitably involve the secondary processing of the alloy (such as weldability). From the current research status, it can be seen that the connection of titanium-aluminum intermetallic compound itself and the connection with other metals are mainly based on solid phase connection. Although brazing and diffusion welding h...

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