Ti55531 alloy is a new type of high-strength and high-toughness β-type alloy with a nominal composition of Ti-5AI-5V-5Mo-3Cr-1Zr. The alloy has good hardenability and a wide range of processing technology and is particularly suitable for manufacturing parts that must withstand huge stress. It is more suitable for connecting devices between structural parts and landing gear, wings, and engine pylons. It is increasingly popular in the aerospace industry and is now used on A380 Airbus aircraft. Compared with the traditional near-beta alloy Ti-1023, the alloy has low smelting and processing costs, does not produce obvious component segregation, and has the advantages of excellent strength and high fracture strength, and gradually replaces Ti-1023.
At present, there have been many studies on the heat treatment process of the alloy bars, but the heat treatment of the plates has not been studied yet. The orthogonal test method is used to optimize the heat treatment process of the alloy plate, and the best heat treatment process is determined, which provides a basis for the production of the plate.
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