航空用超大规格TC18钛合金棒材的制备及组织性能研究  

Study on Preparation,Microstructure and Mechanical Properties of Oversized TC18 Titanium Alloy Bar for Aviation

作　　者：任晓龙 陈宇 张胜 杨晶 王涛[1] 赵宁 Ren Xiaolong;Chen Yu;Zhang Sheng;Yang Jing;Wang Tao;Zhao Ning(Western Superconducting Technologies Co.,Ltd.,National&Local Joint Engineering Laboratory for Special Titanium Alloy Processing Technologies,Xi’an Key Laboratory of Special Titanium Alloy Processing and Simulation Technologies,Xi’an 710018,China)

机构地区：[1]西部超导材料科技股份有限公司特种钛合金材料制备技术国家地方联合工程实验室西安市特种钛合金制备及仿真技术重点实验室,陕西西安710018

出　　处：《钛工业进展》2024年第3期14-18,共5页Titanium Industry Progress

基　　金：秦创原引用高层次创新创业人才项目(QCYRCXM-2023-003)。

摘　　要：经3次真空自耗电弧熔炼得到规格为φ720 mm的TC18钛合金铸锭,再经80 MN快锻机开坯锻造和多道次镦拔锻造,成功制备了航空用φ500 mm超大规格棒材,并对其组织均匀性及力学性能稳定性进行了评价分析。结果表明:TC18钛合金铸锭头、中、尾不同部位的主元素极差在0.1%以内,成分均匀性良好;TC18钛合金棒材不同部位的低倍组织均匀模糊,高倍组织呈现出典型的双态组织,且组织均匀一致性良好;棒材不同部位的力学性能差异较小,具有良好的性能稳定性。The TC18 titanium alloy ingot with diameter of 720 mm was prepared by three times vacuum consumable arc melting.The oversizedφ500 mm TC18 titanium alloy bar for aviation was successfully prepared by 80 MN rapid forging machine via cogging,multiple pass upsetting and drawing.The uniformity of microstructure and the stability of mechanical properties were evaluated and analyzed.The results show that the range of main elements at different positions of TC18 titanium alloy ingot is less than 0.1%indicating well composition uniformity.The macrostructure of TC18 titanium alloy bar at different positions is uniform and fuzzy,and the microstructure presents a typical bimodal microstructure with good uniformity.The mechanical properties of the bar at different positions show well consistency and performance stability.

关 键 词：TC18钛合金 超大规格棒材 化学成分 组织 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]