Method and product for manufacturing titanium alloy dual-structure turbine disk based on partial hydrogenation

A method for manufacturing a titanium alloy dual-structure turbine disk based on partial hydrogenation, comprising the following steps:

• S1:
• coating a glass coating on the partial surface of the round titanium alloy billet which does not require hydrogenation, and sintering the titanium alloy billet coated with the glass coating at a glass coating softening temperature;
• S2:
• placing the sintered titanium alloy billet in a vacuum hydrogenation furnace for hydrogenation, and keeping the sintered titanium alloy billet at a required hydrogenation temperature for a period of time, such that the hydrogen element diffuses inward from the lateral side of the titanium alloy billet, so that the content of hydrogen in the titanium alloy billet is distributed in gradient from outside to inside along radial direction, and the hydrogen content at the configuration position of the wheel rim and the transition region between the wheel rim and the wheel hub reaches the predetermined concentration, and then the furnace is cooled to room temperature;
• S3:
• taking out the titanium alloy billet that has been treated with hydrogenation, and removing the glass coating on the titanium alloy billet;
• S4:
• preheating the titanium alloy billet from which the glass coating has been removed to the specific forging temperature, so that the structure of the wheel hub not subjected to hydrogenation is a α+β phase structure, and the structure of the wheel rim subjected to hydrogenation is a β phase structure, Then, the preheated titanium alloy billet is subjected to high temperature die forging and cooled to room temperature;
• S5:
• the turbine disk obtained by die forging is subjected to vacuum dehydrogenation treatment to remove hydrogen elements inside the forging, so that the hydrogen content is less than 0.015 wt. %.