钛合金空心点阵超塑成形/扩散连接成形工艺和性能研究  

Research on SPF/DB Process and Properties of Titanium Alloy Hollow Lattice

作　　者：赵冰 杨毅 李志强 慕延宏 刘胜京 张斌 张超 孙朝阳[5] 刘杨 王新筑[6] 褚兴荣 韩数 ZHAO Bing;YANG Yi;LI Zhiqiang;MU Yanhong;LIU Shengjing;ZHANG Bin;ZHANG Chao;SUN Chaoyang;LIU Yang;WANG Xinzhu;CHU Xingrong;HAN Shu(AVIC Manufacturing Technology Institute,Beijing 100024,China;Aviation Key Laboratory of Science and Technology on Plastic Forming,Beijing 100024,China;Beijing Key Laboratory on Digital Plastic Forming and Equipment,Beijing 100024,China;AVIC Shaanxi Aircraft Industry Co.,Ltd.,Hanzhong 723213,China;School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;College of Aerospace Engineering,Chongqing University,Chongqing 400044,China;School of Mechanical,Electrical and Information Engineering,Shandong University,Weihai 264209,China)

机构地区：[1]中国航空制造技术研究院,北京100024 [2]塑性成形技术航空科技重点实验室,北京100024 [3]数字化塑性成形技术与装备北京市重点实验室,北京100024 [4]航空工业陕西飞机工业(集团)有限公司,汉中723213 [5]北京科技大学机械工程学院,北京100083 [6]重庆大学航空航天学院,重庆400044 [7]山东大学机电与信息工程学院,威海264209

出　　处：《航空制造技术》2023年第9期24-35,共12页Aeronautical Manufacturing Technology

摘　　要：钛合金空心点阵是典型的承载–功能一体化结构,采用单轴拉伸方法,在不同温度、应变速率条件下测定TA15、TA32钛合金的超塑拉伸延伸率,最大延伸率分别达到1450%和950%,后在不同温度、压力条件下进行扩散连接试验。根据超塑拉伸和扩散连接试验,确定了超塑成形和扩散连接(Superplastic forming/diffusion bonding,SPF/DB)的最佳工艺参数为:920℃/1.5~2.0 MPa/2 h,制备了不同构型和几何参数的TA15、TA32钛合金空心点阵结构件。采用平压方法和三点弯曲方法测定了钛合金空心点阵的力学性能,压缩和弯曲强度最大值分别达到23.83 MPa、596MPa,通过有限元和试验分析的方法,研究了几何参数对钛合金空心点阵平压和弯曲性能的影响规律。采用单面加热方法,研究了钛合金空心点阵结构的隔热性能,在400℃/1 h条件下,隔热温差达到276.3~310℃。Titanium alloy hollow lattice has excellent mechanical properties and physical functions,which is a typical load-function integration structure,and has good application prospects in future aircraft.The superplastic tensile elongation of TA15 and TA32 titanium alloys was measured by uniaxial tensile method at different temperatures and strain rates,the maximum elongation reached 1450%and 950%respectively.The diffusion bonding tests of TA15 and TA32 titanium alloys were carried out at different temperatures and pressures.According to the superplastic tensile and diffusion bonding tests,the optimal process parameters of superplastic forming and diffusion bonding were determined as 920℃/1.5–2.0 MPa/2 h.The hollow lattice structure of TA15 and TA32 titanium alloys with different configurations and geometric parameters were formed by superplastic forming/diffusion bonding(SPF/DB)process at optimal craft.The mechanical properties of titanium alloy hollow lattice were measured by flat compression and three-point bending method,the maximum strength reached 23.83 MPa and 596 MPa respectively.The influence of geometric parameters on the flat compression and bending properties of titanium alloy hollow lattice was studied by means of finite element analysis and experimental analysis.The thermal insulation performance of titanium alloy hollow lattice structure was studied by measuring the temperature difference between the cold and hot surfaces by single-side heating method.At 400℃/1 h,the thermal insulation temperature difference reached 276.3–310℃.

关 键 词：钛合金空心点阵结构 超塑成形/扩散连接(SPF/DB) 空心筋条钛合金空心点阵结构 力学性能 隔热性能 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]