Directional freeze method for TiAl-based alloy plate

Abstract

The continual casting directional solidification method for TiAl-base alloy plate comprises, putting TiAl alloy material bar 3 and dummy ingot 4 with rectangular intersection into the electromagnetic induction range of coil 6, galvanizing to coil 6 with single-phase alternating current with power of 75~100kW from electrical power for 20~25min; the alloy bar 3 and ingot 4 move downward with velocity of 0.01-0.05mm / min and get into the bottom crystallizer 8. This invention overcomes the limit to rectangular intersection blank and fits to press for high performance material in economy, science and national defense industry.

Description

Technical field:

[0001] The invention relates to a continuous melting and casting directional solidification method. Background technique:

[0002] The existing methods for directional solidification of TiAl-based alloys are combined with a circular cavity for melting and casting processing. Since the magnetic induction intensity distribution and metal melting temperature of the cold crucible of the circular cavity are relatively consistent in all directions, so The process conditions that need to be considered are relatively simple, but for relatively complex rectangular cross-section plates, melting and casting cannot be achieved through the existing melting and casting methods, because the directional solidification of the cold crucible is first faced with the heating and melting of the alloy and the electromagnetic force For the constrained forming problem, for electromagnetic melting and constrained forming in a cold crucible with a rectangular cross-section, compared w...

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