航空锻件的超声成像技术  

Ultrasonic imaging technology of aviation forged piece

作　　者：蒋志峰[1,2] 陈继芳[3] 

机构地区：[1]浙江科技学院机械与汽车工程学院,杭州310023 [2]浙江省计量科学研究院,杭州310013 [3]秦山第三核电有限公司,浙江海盐314300

出　　处：《声学技术》2009年第2期121-124,共4页Technical Acoustics

摘　　要：由于锻件表面不平整,且厚度不均,目前超声扫查系统普遍采用手工超声波探伤法检测锻件内部缺陷,无法应用标准的B扫描成像和C扫描成像,存在着效率低、探伤质量较差等不足之处。提出了以"厚度-灰度"超声检测为核心的基本成像过程,包括路径规划、全波采样、信号处理、波形分析和缺陷扫描成像等方法,并示例实现。该检测手段有助于促进航空锻件超声检测的智能化,提高检测的效率和可靠性。Due to rough surface and thickness non-uniformity of forging pieces, manual ultrasonic testing has been commonly used in forging scanning system. As a result, low efficiency and poor quality are unavoidable for not being able to use the standard B-scan and C-scan imaging techniques. In this paper the ultrasonic testing methods of ＂depth-gray＂ imaging, which includes the path planning, full-wave sampling, signal processing, wave-form analysis and scanning imaging for flaw, is proposed, and thereafter illustrated with its promising effects in practical application. The approach is especially useful in promoting intelligence and automation of ultrasonic testing of aircraft forging and thereby improves the efficiency and reliability of testing.

关 键 词：超声成像 缺陷识别 锻件 

分 类 号：TG115.28[金属学及工艺—物理冶金]