| 摘要 |
PURPOSE:To enhance the strength of an intermetallic compd. Ti-Al alloy having a specified compsn. and to improve the ductility and toughness, by subjecting the alloy to isothermal forging, annealing and isothermal forging in one ore more steps. CONSTITUTION:An intermetallic compd. Ti-Al alloy consisting of 30-40% Al and the balance Ti with inevitable impurities is isothermally forged at >=800 deg.C to destroy the coarse structure and to form a fine uniform structure. The forged alloy is annealed at >=800 deg.C to make the structure isometric and homogeneous. The annealed alloy is isothermally forged again in one or more steps at 700-1,100 deg.C and >=10% working rate. The structure is made finer by the forging to enhance the strength. The resulting alloy has satisfactory hot workability and can be used as the material of engine members for an airplane and an automobile.
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