增材制造小缺陷的显微CT检测  

Micro-CT detection of small defects in additive manufacturing

作　　者：涂旺 王文强 陈佳慧 黄瑶 金翠娥[2] 危荃[2] TU Wang;WANG Wenqiang;CHEN Jiahui;HUANG Yao;JIN Cui′e;WEI Quan(Shanghai Shenjian Precision Machinery Technology Co.,Ltd.,Shanghai 201600,China;Shanghai Spaceflight Precision Machinery Institute,Shanghai 201600,China)

机构地区：[1]上海神剑精密机械科技有限公司,上海201600 [2]上海航天精密机械研究所,上海201600

出　　处：《无损检测》2024年第5期50-55,61,共7页Nondestructive Testing

基　　金：上海市产业发展项目(射线快速三维成像与智能识别技术研究及装备推广HCXBCY-2022-045)。

摘　　要：通过高精度金属增材制造技术设计制造了两组不同类型的缺陷试件,并基于显微CT检测技术和缺陷解剖金相检测方式,研究显微CT对增材制造小缺陷的实际检测能力。试验结果表明,显微CT在体素尺寸5μm下能有效检出尺寸为20μm的人工缺陷;金相检测与CT检测结果基本一致,缺陷尺寸测量差小于10μm;由于部分体积效应的影响,更小尺寸缺陷的尺寸测量结果误差更大。In this paper,two groups of different types of defective specimens were designed and manufactured through high-precision metal additive manufacturing technology.Based on the micro-CT detection technology and the defect anatomical metallographic detection method,the actual detection ability of micro-CT on small defects of additive manufacturing was studied.The research results showed that micro-CT can effectively detect the artificial defects of 20μm under the voxel size of 5μm;metallographic detection and CT detection results were basically the same,and the difference in the measurement of the defect size was less than 10μm;the defects of smaller sizes were more inaccurate due to the influence of the partial volume effect of the dimensional measurement results.

关 键 词：增材制造 显微CT 缺陷检测 尺寸测量 

分 类 号：TG115.28[金属学及工艺—物理冶金]