Transactions of Materials and Heat Treatment

Title：Deformation heat treatment process of TC6 titanium alloy blades

Authors： Lu Yanliang Wu Yongbin Huang Lianjie Zhao Chunyan

Unit： The Aviation Power Co. Ltd. of AVIC Guizhou Liyang

KeyWords： TC6 titanium alloy deformation heat treatment thermal correction blade

ClassificationCode：TG156.93

year,vol(issue):pagenumber：2024,49(11):169-174

Abstract：

For the problem of serious deformation of TC6 titanium alloy blades after heat treatment, different deformation heat treatment processes were designed. The changes in key dimensions of blade profile before and after heat treatment and the metallographic structure and mechanical properties of samples after heat treatment were tested to study the feasibility of controlling the deformation of TC6 titanium alloy blades after heat treatment through deformation heat treatment process. The results show that adopting the deformation heat treatment process of “final forging + heat treatment (900-(Tβ-40)℃，holding for 12-16 min, final forging, and transferring the forgings to air and cooling to room temperature within 10 s) low temperature annealing (640 ℃，holding for 120-130 min, cooling to 60 ℃ with 0.1 MPa argon gas and then air cooling)” or “final forging ((Tβ-40)℃，holding for 12-16 min, final forging) thermal correction + heat treatment (850-900 ℃，holding for 12-16 min, thermal correction, and transferring the forgings to air and cooling to room temperature within 10 s) low temperature annealing (640 ℃，holding for 120-130 min, cooling to 60 ℃ with 0.1 MPa argon gas and then air cooling)” reduces the heat treatment deformation amount of TC6 titanium alloy blade by more than 60%. Deformation heat treatment in the thermal correction process after final forging obtains the expected microstructure and properties, which meets the technical requirements of blade forgings. Thus, in order to meet the requirements of dual performance indicators of strength and plasticity for the expected microstructure of blade forgings after deformation heat treatment, the holding temperature or time during deformation heat treatment can be appropriately adjusted.

Funds：

贵州省专项基金资助项目（2018036）

作者简介：陆彦良（1988-），男，学士，高级工程师 E-mail：wugaoaliang@163.com

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