TC17钛合金压气机前轴颈锻件β锻造工艺优化  

Optimization of β Forging Process for TC17 Titanium Alloy Front Axle Neck of a Compressor

作　　者：何俊 王鹏 覃佳栋 曾卫东[2] 徐建伟[2] He Jun;Wang Peng;Qin Jiadong;Zeng Weidong;Xu Jianwei(AECC Aviation Power Co.,Ltd.,Xi’an 710071,China;State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]中国航发动力股份有限公司,陕西西安710071 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《钛工业进展》2021年第4期5-10,共6页Titanium Industry Progress

基　　金：国家自然科学基金项目(51905436)。

摘　　要：采用有限元模拟分析了TC17钛合金压气机前轴颈锻件原工艺的成形过程,发现原工艺的预制坯采用棒材局部镦粗的成形方式不合理,造成了锻件轮盘部位应变过大,杆部应变过小,各部位组织不均匀。通过优化预制坯结构,采用饼坯挤压成形工艺后,显著地改善了锻件应变的均匀性和组织的均匀性,高倍组织为典型的网篮组织,β晶粒得到明显拉长,且晶界α相出现弯折。力学性能测试结果表明,优化后锻件各部位的室温拉伸性能、硬度和低周疲劳性能差异较小,满足相关技术标准的要求。The forming process of the TC17 titanium alloy front axle neck of a compressor was analyzed by finite element simulation.It is found that the local upsetting forming method of the preformed blank of the original process is unreasonable,which results in the excessive strain of the disk and the small strain of the rod as well as the uneven structure of each part.The strain homogeneity and microstructure homogeneity of the forgings are significantly improved by optimizing the structure process of the prefabricated billets and adopting the cake extrusion forming process.The microstructure is typical basket structure,theβgrains are obviously elongated,and the grain boundaryαphase appears bending.The test results of mechanical properties show that the tensile properties,hardness and low-cycle fatigue properties of forging after optimizing have little difference at room temperature,and meet the requirements of relevant technical standards.

关 键 词：前轴颈 有限元模拟 组织均匀性 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]