Method for manufacturing a nickel-titanium alloy using a high vacuum crucibleless levitation melting process

A method for manufacturing a nickel-titanium alloy using a high vacuum crucibleless levitation melting process, the method comprising:

• step A:
• placing a titanium material on a first bracket, and placing a nickel material on a second bracket, so as to make the titanium nickel and materials located in a vacuum confined space of a melting chamber;
• step B:
• vacuumizing the vacuum confined space of the melting chamber to below a pressure of 10−5 Torr, and lifting up the titanium material placed on the first bracket to a working area of an induction coil;
• step C:
• introducing inert gases, to prevent the titanium material from producing an oxidization reaction in a subsequent high-temperature process;
• step D:
• starting the induction coil, to make the titanium material in a levitation state and electromagnetically stirred and heated;
• step E:
• dropping the first bracket, to make the titanium material stably levitate and electromagnetically stirred and heated;
• step F:
• measuring whether the temperature of the working area of the induction coil reaches a predetermined temperature range between 1200-1600° C., to confirm whether the first active metal is in a half molten state;
• step G:
• when the first active metal is in the half molten state, dropping the nickel material placed on the second bracket to be added to the titanium material, and obtaining a homogenizing nickel-titanium alloy by means of electromagnetic stirring and heating;
• and
• step H:
• recycling the homogenizing nickel-titanium alloy automatically or manually, to accomplish a high vacuum crucibleless levitation melting process.