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GB/T 45169-2025 English PDF

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GB/T 45169-2025: Additive manufacturing - Residual stress of metal parts - Method of sound beam control
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Basic data

Standard ID GB/T 45169-2025 (GB/T45169-2025)
Description (Translated English) Additive manufacturing - Residual stress of metal parts - Method of sound beam control
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H22
Classification of International Standard 25.030
Word Count Estimation 14,189
Date of Issue 2025-01-24
Date of Implementation 2025-01-24
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 45169-2025: Additive manufacturing - Residual stress of metal parts - Method of sound beam control


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 25.030 CCSH22 National Standard of the People's Republic of China Residual stress in additively manufactured metal parts Beam Steering Released on 2025-01-24 2025-01-24 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Principle 2 5 Operators 2 6 Beam control system 2 7 Working process 4 8 Inspection methods 6 9 Process Record Documents 6 Appendix A (Informative) Exciter Arrangement for Acoustic Beam Control of Residual Stress in Typical Structural Metal Parts 7

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. Beijing Institute of Technology, China Machinery Productivity Promotion Center Co., Ltd., Inner Mongolia First Machinery Group Co., Ltd. China Ordnance Science Academy Ningbo Branch, China Aviation Manufacturing Technology Research Institute, Taihang National Laboratory, Xi'an National Research Institute of Additive Manufacturing Institute Co., Ltd., Huazhi Excellence Productivity Promotion (Beijing) Co., Ltd., China Machinery Research Institute of Standards and Technology (Beijing) Co., Ltd., Guangdong Hanbang Laser Technology Co., Ltd., Xi'an Jiaotong University, Aerospace Additive Technology (Beijing) Co., Ltd., Northwestern Polytechnical University, Wuxi Inspection and Certification Research Institute, South China University of Technology, Beijing Xinjinghe Additive Manufacturing Technology Co., Ltd., University of Science and Technology Beijing, and Huazhong University of Science and Technology. The main drafters of this document are. Xu Chunguang, Xue Lian, Zhang Wenjun, Li Peilu, Mingzhu, Zhang Jie, Lei Liming, Hou Ying, Li Jianqiang, Hu Fan, Niu Liuhui, Guo Wenhua, Zhang Wei, Yu Jun, Mao Yuyi, Wang Di, Li Guangsheng, Zhou Xianglin, Liu Xinwang, Li Cencheng, Yin Peng.

Introduction

The complex thermal cycle and other factors in the metal additive manufacturing process lead to unevenly distributed residual stress inside the additive component, which seriously Influencing component performance and manufacturing accuracy, controlling the generation process of residual stress while adding materials will effectively improve the quality of metal parts. The introduction of residual stress acoustic beam control in additive manufacturing not only inhibits the generation and growth of residual stress, but also enables additive parts to be designed more precisely. It is thinner, smaller, more complex, and can refine the grains in the grain nucleation stage to meet the requirements of various additive manufacturing processes for internal thermal stress control, deformation This method can be used to replace the traditional method of reducing residual stress. Residual stress in additively manufactured metal parts Beam Steering

1 Scope

This document specifies the principles, operators, and beam control system of the residual stress acoustic beam control method in the production process of additively manufactured metal parts. systems, work processes, inspection methods and process record documents. This document applies to the production of aluminum alloy, titanium alloy and cemented carbide metal parts produced by arc additive manufacturing using the acoustic beam control method. Residual stress generated is reduced and homogenized.

2 Normative references

The contents of the following documents constitute the 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 12604.1 Nondestructive testing terminology Ultrasonic testing GB/T 32073 Nondestructive testing of residual stress by ultrasonic critical refraction longitudinal wave testing method GB/T 35351 Terminology for Additive Manufacturing GB/T 38811 Acoustic beam control method for residual stress in metallic materials GB/T 38952 Nondestructive testing of residual stresses by ultrasonic body wave testing GB/T 40121 Technical product documentation - Symbolic representation of residual stress in products

3 Terms and definitions

The terms and definitions defined in GB/T 12604.1 and GB/T 35351 and the following apply to this document. 3.1 Sound beam control sound beam control Inject sound waves or elastic waves with a certain amount of energy into the material in a certain direction and within a certain range, so that the residual stress inside the material is The process of reducing and equalizing force to a certain extent. 3.2 Timing control The process of controlling the acoustic energy at different spatial locations according to the location and speed of different heat sources. 3.3 exciter A device that can generate a certain amount of energy, and the frequency and amplitude of the energy are controllable elastic waves. Note. The actuator is usually prepared using principles such as piezoelectric ceramics. [Source. GB/T 38811-2020, 5.4, modified] 3.4 Luffing pole ultrasonichorn A component installed at the end of the exciter and tightly coupled to the back side of the substrate working surface for heat insulation and sound wave conduction and conversion.

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