增材制造流道多余物X射线成像检出能力研究

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中文摘要：采用激光选区熔化工艺增材制造了含复杂流道的燃烧室模拟件,流道内部预制了不同尺寸的凸出立方体多余物,并放置一组标准尺寸金属丝模拟线形多余物.采用计算机射线照相(Computed radiology,CR)和显微计算机层析成像(Computed tomogra-phy,CT)对试样进行检测,研究X射线成像方法对增材制件内部流道多余物的检测能力,并采用显微CT对流道壁厚进行分析与评估.结果表明,CR可检出最小设计尺寸为0.15 mm的凸出立方体多余物和最小丝径为0.1 mm的线形多余物;显微CT可检出最小设计尺寸为0.08 mm的凸出立方体多余物和最小丝径为0.1 mm的线形多余物.显微CT尺寸测量结果显示,线形多余物测量尺寸与标准尺寸一致,凸出立方体多余物测量尺寸普遍大于设计尺寸,最大绝对误差不超过50 μm.通过显微CT壁厚分析发现,宽段流道均匀性良好.

外文标题：X-ray Imaging Detection Capability of Residues in Additive Manufactured Channels

外文摘要：A combustion chamber simulator with complex channels was manufactured by selective laser melting tech-nique.Convex cubic residues with different sizes were prefabricated in the channels,and a set of standard size metal wires were placed to simulate linear residues.Computed radiology(CR)and microscopic computed tomography(CT)were utilized to investigate the detection capability of X-ray imaging method for residues in the internal channels of addi-tive parts,and the wall thickness of channel was analyzed and evaluated by micro-CT.The results indicate that CR can detect the convex cubic residues with a minimum size of 0.15 mm and linear residues with a minimum diameter of 0.1 mm,while micro-CT can detect the convex cubic residues with a minimum size of 0.08 mm and linear residues with a minimum diameter of 0.1 mm.The measurement sizes of linear residues are consistent with standard size,while that of convex cubic residues are generally larger than the designed sizes with the maximum absolute error less than 50 μm.Moreover,the wide-section channels exhibit desirable uniformity by micro-CT.

外文关键词：

Selective Laser MeltingMicro Computed TomographyComputed RadiologyResidueChannel

作者：

布树鹏、敖波、宋鸿玉、刘玲玲、刘海强

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作者单位：

南昌航空大学无损检测技术教育部重点实验室,南昌 330063

中国航发沈阳黎明航空发动机有限责任公司,沈阳 110044

关键词：

激光选区熔化显微计算机层析成像计算机射线照相多余物流道

基金：

国防基础科研资助项目国家自然科学基金资助项目江西省自然科学基金资助项目无损检测技术教育部重点实验室开放基金资助项目无损检测技术教育部重点实验室开放基金资助项目

项目编号：

JCKY2019401D0016236104420232BAB212001EW202101217EW201908440

出版年：

2024

DOI：

10.15980/j.tzzz.2024.09.011

特种铸造及有色合金

中国机械工程学会铸造分会

特种铸造及有色合金

CSTPCD北大核心

影响因子：0.481

ISSN：1001-2249

年,卷(期)：2024.44(9)