GB/T 40728-2021Remanufacturing—Quality inspection methods for repaired layers of mechanical products (English PDF)
再制造 机械产品修复层质量检测方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 11, 2021
Implementation date
May 1, 2022
Scope
GB/T 40728-2021 is the English-translated version of 再制造 机械产品修复层质量检测方法.
GB/T 40728-2021 gives the methods for inspecting the quality of repaired layers on remanufactured mechanical products. After terms, definitions and general requirements, it covers inspection of appearance quality, inspection of internal quality and performance testing.
Informative annexes classify repaired layers and list common methods for measuring layer thickness, judging gloss, identifying typical surface defects, applying non-destructive testing to internal defects, analysing phase and crystal structure, and analysing element composition.
The referenced standards include tensile, Charpy impact, Rockwell, Vickers and Leeb hardness tests, surface roughness, coating adhesion, porosity, grain size, tensile bond strength of thermal spray coatings, corrosion rating and X-ray photoelectron spectroscopy.
It applies to the inspection of repaired layers of remanufactured mechanical products. It was issued on 11 October 2021 and has applied since 1 May 2022.
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Document preview — GB/T 40728-2021
National Standard of the People's Republic of China
- ICS
- 25.220.01
- Classification
- J 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 General requirements
- 5 Appearance quality inspection
- 6 Internal quality inspection
- 7 Performance test
- Appendix A (informative) Classification of repaired layers
- Appendix B (Informative) Commonly used repair layer thickness detection methods and standard basis
- Appendix C (Informative) Judgment basis for the visual evaluation of the gloss of the restoration layer and the requirements of different grade gloss samples
- Appendix D (informative) The characteristics, causes, inspection methods and requirements of typical surface defects of the repair layer
- Appendix E (Informative) Application scope and standard basis of typical non-destructive testing techniques to detect and repair internal defects of the layer
- Appendix F (Informative) Commonly used repair layer phase and crystal structure detection and analysis methods and standard basis
- Appendix G (informative) Commonly used repair layer element composition and content analysis method
- Reference
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" Drafting.
1 Scope
This document specifies the terms, definitions, general requirements, and appearance quality of the repair layer (hereinafter referred to as the repair layer) quality inspection of remanufactured machinery Content, internal quality and performance testing methods.
This document is applicable to the detection of the repair layer of remanufactured mechanical products.
2 Normative references
The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 228.1 Tensile Test of Metallic Materials Part 1: Room Temperature Test Method
GB/T 229 Charpy Pendulum Impact Test Method for Metallic Materials
GB/T 230.1 Rockwell Hardness Test of Metallic Materials Part 1: Test Method
GB/T 1031 Product Geometric Technical Specification (GPS) Surface Texture Profile Method Surface Roughness Parameters and Numerical Values
GB/T 1817 Hard alloy room temperature impact toughness test method
GB/T 3138 Terminology for surface treatment of metal and other inorganic coatings
GB/T 3365 Test method for pore content and fiber volume content of carbon fiber reinforced plastics
GB/T 3489 Cemented carbide porosity and metallographic determination of non-combined carbon
GB/T 4340.1 Vickers hardness test of metallic materials Part 1: Test method
GB/T 5270 A review of test methods for the adhesion strength of metal coatings on metal substrates by electrodeposition and electroless deposition
GB/T 6394 Method for determination of average grain size of metals
GB/T 6461 Rating of samples and test pieces of metal and other inorganic coatings on metal substrates after corrosion tests
GB/T 8642 Determination of tensile bond strength of thermal spraying
GB/T 9790 Vickers and Knoop microhardness test of metallic materials and other inorganic coatings
GB/T 17394.1 Leeb Hardness Test of Metallic Materials Part 1: Test Method
GB/T 17394.4 Leeb Hardness Test of Metallic Materials Part 4: Hardness Conversion Table
GB/T 17720 Comment on Metal Covering Layer Porosity Test
GB/T 17721 Metal covering layer porosity test iron reagent test
GB/T 18179 Porosity Test of Metal Overlay Moist Sulfur (Sulfur Bloom) Test
GB/T 18590 Corrosion pitting assessment method of metals and alloys
GB/T 19291 General principles of corrosion test for metals and alloys
GB/T 19292.1 Corrosion of metals and alloys. Atmospheric corrosivity-Part 1: Classification, determination and evaluation
GB/T 19292.4 Corrosion of metals and alloys. Atmospheric corrosivity. Part 4: Corrosion of standard specimens used to evaluate corrosivity Rate determination
GB/T 19500 X-ray photoelectron spectroscopy analysis method general rule
GB/T 21650.1 Determination of pore size distribution and porosity of solid materials by mercury intrusion method and gas adsorption method Part 1: Mercury intrusion method
GB/T 21650.2 Determination of pore size distribution and porosity of solid materials by mercury intrusion method and gas adsorption method Part 2: Gas adsorption method
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 228.1Metallic Materials — Tensile Testing — Part 1: Method of Test at Room Temperature
- GB/T 229Metallic Materials — Charpy Pendulum Impact Test Method
- GB/T 230.1Metallic materials - Rockwell hardness test - Part 1: Test method
- GB/T 1031Geometrical product specifications(GPS) - Surface texture: Profile method - Surface roughness parameters and their values
- GB/T 1817Test method for impact toughness of cemented carbides at room temperature
- GB/T 3138Metallic and other inorganic coatings -- Surface treatment, metallic and other inorganic coatings -- Vocabulary
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