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GB/T 44524-2024: Additive manufacturing - Porosity of metal parts - Industrial computed tomography(CT) testing method
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GB/T 44524-2024: Additive manufacturing - Porosity of metal parts - Industrial computed tomography(CT) testing method

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ICS 25.030 CCSH26 National Standard of the People's Republic of China Porosity of Additively Manufactured Metal Parts Industrial Computer Tomography (CT) Inspection Methods Released on 2024-09-29 Implementation on September 29, 2024 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Testing Agreement 2 5 General requirements 3 5.1 Testing personnel 3 5.2 Environmental conditions 3 6 System Requirements 3 6.1 Industrial CT System 3 6.2 Detector system 3 6.3 Computer System 3 7 System Maintenance 3 8 Test preparation 4 8.1 Fixture 4 8.2 Comparative Sample 4 8.3 Parts to be inspected 4 8.4 Inspection process card 4 9 Detection 4 9.1 Parameter Settings 4 9.2 Scan 5 10 Image reconstruction, processing and analysis 5 10.1 General requirements 5 10.2 Image Reconstruction 5 10.3 Image Processing 5 10.4 Image Analysis 5 11 Determination and expression of pore parameters 5 11.1 Selection of reference area or reference space 5 11.2 Determination of pore parameters 5 11.3 Pore parameter representation 6 11.4 Image Saving 7 12 Test records and reports 7 Appendix A (Informative) Technical Communication Table 9 Appendix B (Informative) Preparation of Comparative Samples 11 Appendix C (Informative) Test Process Card 12 Appendix D (Normative) Selection of reference areas in two-dimensional planes 13 Appendix E (Normative) Selection of reference space in three-dimensional space 15 Reference 17

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Machinery Industry Federation. This document is under the jurisdiction of the National Additive Manufacturing Standardization Technical Committee (SAC/TC562). This document was drafted by. Wuxi Inspection, Testing and Certification Institute, AVIC Matt Additive Technology (Beijing) Co., Ltd., State-owned Wuhu Machinery Factory, Beijing Yuding Additive Manufacturing Research Institute Co., Ltd., Zhejiang Flashcast Group Co., Ltd., Nanjing University of Aeronautics and Astronautics Wuxi Research Institute, AVIC Commercial Aircraft Engine Co., Ltd., China Machinery Research Institute of Standards and Technology (Beijing) Co., Ltd., Nanjing University of Aeronautics and Astronautics, Beijing Power Machinery Research Institute, China Nuclear Power Research Institute, Taihang National Laboratory, China Food and Drug Inspection Institute, China Classification Society, Jiangsu Mingya Technology Co., Ltd., and Beijing Chunlizhengda Medical Equipment Co., Ltd. The main drafters of this document are. Gao Yintao, Bao Jun, Gao Zhengjiang, Ci Shiwei, Qian Tingting, Qu Yuhui, Hu Juan, Shen Lida, Lei Liming, Song Yanyan, Xue Lian, Yan Lei, Xie Deqiao, Zhang Hong, Hu Yu, Shi Lei, Wang Jian, Zhou Hansen, Li Yucheng, Liu Yisheng, Xu Kuixue. Porosity of Additively Manufactured Metal Parts Industrial Computer Tomography (CT) Inspection Methods

1 Scope

This document describes the conventions, general requirements, and system requirements for industrial computed tomography (CT) testing of porosity in additively manufactured metal parts. Requirements, system maintenance, test preparation, testing, image reconstruction, processing and analysis, determination and representation of pore parameters and test records and reports, etc. This document is applicable to industrial CT detection of porosity of additively manufactured metal parts and reference for detection of porosity of additively manufactured non-metallic parts. use.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 9445 Qualification and certification of non-destructive testing personnel GB/T 12604.12-2021 Nondestructive testing terminology Part 12.Industrial X-ray computed tomography testing GB 18871 Basic Standard for Ionizing Radiation Protection and Radiation Source Safety GB/T 29068 Selection Guide for Industrial Computer Tomography (CT) Systems for Nondestructive Testing GB/T 29069 Non-destructive testing industrial computer tomography (CT) system performance test method GB/T 29070 General requirements for industrial non-destructive testing - Computerized tomography (CT) testing GBZ 98 Health requirements and monitoring standards for radiation workers

3 Terms and definitions

The terms and definitions defined in GB/T 12604.12-2021 and the following apply to this document. 3.1 Density resolution densityresolution The ability of CT images to resolve differences in linear attenuation coefficients. [Source. GB/T 12604.12-2021, 3.21] 3.2 Spatial resolution A measure of the ability of a CT system to identify and distinguish geometric details of an object being measured. [Source. GB/T 12604.12-2021, 3.43] 3.3 pore A discontinuity having a density lower than that of the bulk material. Note. Usually includes pores, lack of fusion, voids and cracks. ...