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GB/T 41477-2022: Testing methods for mechanical properties of metal parts repaired by laser cladding
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GB/T 41477-2022: Testing methods for mechanical properties of metal parts repaired by laser cladding

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Testing methods for mechanical properties of metal parts repaired by laser cladding ICS 77.040.10 CCSH22 National Standards of People's Republic of China Laser Cladding Repair of Metal Parts Mechanical properties test method Published on 2022-04-15 2022-08-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration directory Foreword V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 symbol 4 5 Basic Requirements 6 5.1 Test procedure 6 5.2 Specimen substrate 6 5.3 Cladding material 6 5.4 Process requirements 6 6 Sample preparation 6 6.1 Sample preparation method 6 6.2 Prototype production 6 7 Test method 7 7.1 Tensile test 7 7.2 Impact test 8 7.3 Fatigue test 8 8 Test report9 8.1 General 9 8.2 Tensile test report 9 8.3 Impact test report 9 8.4 Fatigue test report 9 Appendix A (normative) Tensile Specimen Preparation 10 A.1 General Requirements 10 A.2 Sampling direction of the sample 10 A.3 Rectangular cross-section tensile test specimen 10 A.4 Circular cross-section tensile test specimen 13 Appendix B (normative) Impact test specimen preparation 16 B.1 General requirements 16 B.2 Sampling direction of the sample 17 B.3 Preparation of Impact Specimen for Surface Repair 17 Appendix C (normative) Fatigue Specimen Preparation 20 C.1 General Requirements 20 C.2 Sampling direction of the sample 20 C.3 Fatigue Specimen with Rectangular Cross Section 20 C.4 Circular cross-section fatigue specimens 23 Figure 1 Schematic diagram of the proportion of repaired thickness 2 Figure 2 Schematic diagram of the proportion of repaired surface area 2 Fig.3 Schematic diagram of repair thickness, repair outer surface radius, fill bevel and fill fillet of the sample 3 Fig. 4 Schematic diagram of side length, filling bevel and filling fillet of the outer surface of the sample repaired 4 Figure 5 Schematic diagram of pit repair 6 Figure 6 Schematic diagram of groove repair 7 Figure 7 Schematic diagram of surface repair 7 Figure A.1 Schematic diagram of sample sampling direction 10 Figure A.2 Tensile test specimen with rectangular cross section 11 Figure A.3 Tensile specimens repaired with flat pits 12 Figure A.4 Tensile Specimen Repaired with Flat Groove 12 Figure A.5 Flat Surface Repair Form 1 --- Tensile Specimen 13 Figure A.6 Flat Surface Repair Form 2 --- Tensile Specimen 13 Figure A.7 Flat Surface Repair Form 3 --- Tensile Specimen 13 Figure A.8 Tensile test specimen with circular cross section 14 Figure A.9 Round bar surface repair form 1 --- Tensile specimen 14 Figure A.10 Round bar surface repair form 2 --- Tensile specimen 15 Figure B.1 V-type standard sample 16 Figure B.2 U-shaped standard sample 16 Figure B.3 Schematic diagram of sampling direction of impact specimen 17 Figure B.4 Surface Repair Form 1 --- Impact Specimen 18 Figure B.5 Surface Repair Form 2 --- Impact Specimen (away from the impact notch) 18 Figure B.6 Surface Repair Form 2 --- Impact Specimen (near the impact notch) 18 Figure B.7 Surface Repair Form 3 --- Impact Specimen 19 Figure C.1 Fatigue Specimen with Rectangular Cross Section 21 Figure C.2 Fatigue specimens repaired with flat pits 21 Figure C.3 Fatigue Specimen Repaired by Flat Groove 22 Figure C.4 Flat Surface Repair Form 1 --- Fatigue Specimen 23 Figure C.5 Flat Surface Repair Form 2 --- Fatigue Specimen 23 Figure C.6 Flat Surface Repair Form 3 --- Fatigue Specimen 23 Figure C.7 Circular cross-section fatigue specimen 24 Figure C.8 Round Bar Surface Repair Form 1 --- Fatigue Specimen 24 Figure C.9 Round Bar Surface Repair Form 2---Fatigue Specimen 25 Table 1 Symbols and Descriptions 5 Table A.1 Rectangular Cross Section Tensile Ratio Specimen Dimensions 11 Table A.2 Recommended Repair Thickness for Pit Repair and Groove Repair Tensile Specimens 11 Table A.3 Tensile test specimens for groove repair are recommended to repair the outer surface side length 12 Table A.4 Circular Cross Section Tensile Ratio Specimen Dimensions 14 Table B.1 Surface Repair Form 1 --- Impact Specimen Repair Thickness 18 Table B.2 Surface Repair Form 2 --- Impact Specimen Repair Thickness 19 Table C.1 Rectangular cross-section fatigue specimen size 20 Table C.2 Recommended Repair Thickness for Pit Repair and Groove Repair Fatigue Specimens 22 Table C.3 Groove repair fatigue specimens recommended repair outer surface side length 22 Table C.4 Dimensions of circular cross-section fatigue specimens 24

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 of Standardization Documents" drafted. Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents. This document is proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Standardization Committee of Laser Repair Technology (SAC/TC482). This document is drafted by. Shenyang University of Aeronautics and Astronautics, Shenyang Continental Laser Technology Co., Ltd., Shenyang Foundry Research Institute Co., Ltd., CRRC Qingdao Sifang Locomotive and Rolling Stock Co., Ltd., Shenyang Aircraft Industry (Group) Co., Ltd., China Civil Aviation Shenyang Aircraft Airworthiness Certification Heart, Shanghai Continental Laser Technology Co., Ltd., Shanghai Jiaotong University, Shanghai Institute of Electrical Engineering, Shenyang University of Technology, Institute of Metal Research, Chinese Academy of Sciences, Shenyang University, Offshore Oil Fudao Co., Ltd., National Center for Quality Supervision and Inspection of Remanufactured Machinery Products (Shandong), Northeastern University, Shenyang Shengyuan Testing Technology Co., Ltd., Baoshan Iron and Steel Co., Ltd., State-owned Sichuan West Machinery Factory, Xiangyang Hangtai Power Machinery Factory, Xi'an Shaangu Power Co., Ltd. Co., Ltd., Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang Jianzhu University, Chongqing Pump Factory Co., Ltd., Xi'an Thermal Engineering Research Institute have Ltd. The main drafters of this document. Hui Li, Zhou Song, Chen Jiang, Xu Liang, Yang Guang, Xie Huasheng, Zhang Zhenxian, Wang Yuguang, Wang Wei, Wang Lei, Pan Xin, Li Xiaodan, Zhao Jun, Shi Kun, Sun Jinbo, Zhang Jingbo, Feng Kai, Li Lei, Zhang Song, Yao Ge, He Chunlin, Xu Min, Lu Zhengjie, Zhao Bingfeng, Fan Jiancheng, Wu Chenliang, Xiao Jiulin, Su Lei, Sun Hongmei, Gui Min, Sun Biao, Wang Fan, Zhao Jibin, Zhang Xiaochen, Zhao Yuhui, Xie Wei. Laser Cladding Repair of Metal Parts Mechanical properties test method

1 Scope

This document specifies the basic requirements, sample preparation, test methods and test reports for the mechanical properties test of metal parts repaired by laser cladding. This document applies to the mechanical properties (tensile, impact and fatigue) tests of metal parts repaired by laser cladding (hereinafter referred to as "repair").

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document. GB/T 228.1-2010 Tensile test of metallic materials - Part 1.Test method at room temperature GB/T 228.2 Tensile Test of Metallic Materials Part 2.High Temperature Test Method GB/T 228.3 Tensile Test of Metallic Materials Part 3.Low Temperature Test Method GB/T 229-2020 Charpy Pendulum Impact Test Method for Metal Materials GB/T 3075-2021 Axial force control method for fatigue test of metallic materials GB/T 29795 Laser Repair Technical Terms and Definitions GB/T 29796 General technical specification for laser repair

3 Terms and Definitions

GB/T 228.1, GB/T 228.2, GB/T 228.3, GB/T 229, GB/T 3075, GB/T 29795, GB/T 29796 and the following terms and definitions apply to this document. 3.1 Tr On the repaired section of the repaired component, the thickness of the repaired part accounts for the percentage of the original thickness. Note 1.Tr=Th/Dh×100%, see Figure 1. Note 2.hereinafter referred to as "thickness ratio". ...