飞机壁板钛合金T型焊缝的高频超声相控阵检测技术  

High Frequency Ultrasonic Phased Array Inspection Technology for T–Shaped Welds of Titanium Alloy in Aircraft Wall Panel

作　　者：陈伟兵 董德秀 陈振华[1] 李承庚 卢超[1,3] CHEN Weibing;DONG Dexiu;CHEN Zhenhua;LI Chenggeng;LU Chao(Key Laboratory of Nondestructive Testing of Ministry of Education,Nanchang Hangkong Universtiy,Nanchang 330063,China;AECC Shenyang Liming Aero-Engine Co.,Ltd.,Shenyang 110043,China;Gannan Normal University,Ganzhou 334001,China)

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,南昌330063 [2]中国航发沈阳黎明航空发动机有限责任公司,沈阳110043 [3]赣南师范大学,赣州334001

出　　处：《航空制造技术》2023年第23期66-69,78,共5页Aeronautical Manufacturing Technology

基　　金：装备预研重点实验室基金(6142908180102);江西省自然科学基金(20202BABL201023)。

摘　　要：飞机壁板钛合金双束激光焊逐渐成为高性能机身结构的主要连接方式。鉴于壁板焊缝质量要求高、缺陷类型多、焊缝规模大,亟须一种兼顾高效率和高精度的无损检测技术保障其安全性能。本研究提出飞机壁板焊缝的高频超声相控阵检测技术,设计了相控阵超声检测探头及对比试块对焊缝内外部缺陷进行扇扫成像检测,并通过金相方法验证了检测结果。结果表明,高频超声相控阵检测技术可有效检测壁板T型焊缝中的典型内外部缺陷,包括未熔合、气孔、咬边、焊缝成形不良,高频相控阵检测技术的高效率、高精度、直观可靠的特点使其适用于飞机壁板焊缝的无损检测。Dual-beam laser welding of titanium alloys for aircraft wall panels has gradually become the main connection method for high-performance fuselage structures.In view of the high requirements of wall panel welds,variety of defects,and large-scale welds,there is an urgent need for a non-destructive testing technology that takes into account the characteristics of high efficiency and high precision to ensure its safety performance.The high-frequency ultrasonic phased array inspection technology for the welding seam of aircraft wall panels is proposed in the research.The phased array ultrasonic inspection probe and the contrast test block are designed to perform fan-scan imaging detection of the internal and external defects of the weld seam,and then,the detection is verified by the metallographic method result.The research results show that the high-frequency ultrasonic phased array inspection technology can effectively detect the typical internal and external defects in the wall T–weld seam,including:non-fusion,pores,undercut,poor weld formation.The advantages of high efficiency,high precision,intuitive and reliable characteristics,make it suitable for non-destructive testing of aircraft wall welds.

关 键 词：双束激光焊 超声相控阵 飞机壁板 缺陷检测 金相法 

分 类 号：V262[航空宇航科学与技术—航空宇航制造工程]