TC6钛合金叶片形变热处理工艺  

Deformation heat treatment process of TC6 titanium alloy blades

作　　者：陆彦良 吴永斌 黄联杰 赵春燕 Lu Yanliang;Wu Yongbin;Huang Lianjie;Zhao Chunyan(The Aviation Power Co.,Ltd.of AVIC Guizhou Liyang,Guiyang 550000,China)

机构地区：[1]中国航发贵州黎阳航空动力有限公司,贵州贵阳550000

出　　处：《锻压技术》2024年第11期169-174,共6页Forging & Stamping Technology

基　　金：贵州省专项基金资助项目(2018036)

摘　　要：针对TC6钛合金叶片在热处理后发生严重变形的问题,设计了不同的形变热处理工艺,对热处理前后叶片叶型关键尺寸变化以及热处理后试样的金相组织和力学性能进行检测,研究了通过形变热处理工艺控制TC6钛合金叶片热处理后变形的可行性。结果表明:采用“终锻+热处理(900~(T_(β)-40)℃,保温12~16min,终锻,10s内将锻件转移至空气中冷却至室温)→低温退火(640℃,保温120~130min,0.1MPa氩气冷却至60℃后空冷)”或“终锻((T_(β)-40)℃,保温12~16min,终锻)→热校+热处理(850~900℃,保温12~16min,热校,10s内将锻件转移至空气中冷却至室温)→低温退火(640℃,保温120~130min,0.1MPa氩气冷却至60℃后空冷)”的形变热处理工艺,可降低60%以上的TC6钛合金叶片的热处理变形量;在终锻之后的热校正工序中进行形变热处理可获得预期的组织及性能,能够满足叶片锻件的技术要求;为满足强度与塑性双重性能指标对叶片锻件形变热处理后的预期组织的要求,可适当调整形变热处理时的保温温度或保温时间。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-(T_(β)-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((T_(β)-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.

关 键 词：TC6钛合金 形变 热处理 热校 叶片 

分 类 号：TG156.93[金属学及工艺—热处理]