1 Scope
This standard specifies the terms and definitions, ordering information, model dimension and limit deviations, technical requirements, test methods, inspection rules, marking and quality certificate, quality assurance, etc. for 43 kg/m~75 kg/m rails.
This standard is applicable to 43 kg/m~75 kg/m hot-rolled and online heat-treated rails for railway with a maximum running speed of 160 km/h. For heat-treated rails for high speed railway, it may apply.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The N-benzoy-N-phenylhydroxylamine Extraction Photometric Method for the Determination of Vanadium Content
GB/T 223.49 Methods for Chemical Analysis of Iron, Steel and Alloy Extraction Separation - Chlorophosphonazo mA Spectrophotometric Method for the Determination of the Total Rare Earth Content
GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy - The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content
GB/T 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy - The Butyl Acetate Extraction Photometric Method for the Determination of Phosphorus Content
GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium (Potassium) Periodate Photometric Method for the Determination of Manganese Content
GB/T 223.68 Methods for Chemical Analysis of Iron, Steel and Alloy - The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content
GB/T 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy - The Gravimetric Method after Combustion in the Pipe Furnace for the Determination of Carbon Content
GB/T 223.82 Steel and Iron - Determination of Hydrogen Content - Inert Gas Impulse Fusion Heat Conductivity Method
GB/T 226 Etch Test for Macrostructure and Defect of Steels
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1: Method of Test at Room Temperature"
GB/T 230.1 Metallic Materials - Rockwell Hardness Test Part 1: Test Method
GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1: Test Method
GB/T 3075 Metallic Materials - Fatigue Testing - Axial-force-controlled Method
GB/T 4161 Plane strain Fracture Toughness KIC Test Method for Metal Material
GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)
GB/T 4340.1 Metallic Materials-Vickers Hardness Test - Part 1: Test Method
GB/T 6398. STANDARD Test Method for Fatigue Crack Growth Rates of Metallic Materials
GB/T 10561-2005 Steel Determination of Content of Nonmetallic Inclusions Micrographic Method Using Standards Diagrams
GB/T 11261 Steel and Iron - Determination of Oxygen Content - The Pulse Heating Inert Gas Fusion-Infra-red Absorption Method
GB/T 13298 Metal-Inspection Method of Microstructure
GB/T 19001 Quality Management Systems Requirements
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition
GB/T 20123 Steel and Iron - Determination of Total Carbon and Sulfur Content Infrared Absorption Method after Combustion in an Induction Furnace (Routine Method)
GB/T 20124 Steel and Iron - Determination of Nitrogen Content - Thermal Conductimetric Method after Fusion in a Current of Inert Gas
YB/T 081 Rule for Rounding off of Numerical Values and Judgment of Testing Values for Technical Standards of Metallurgy
YB/T 951 Method of the Ultrasonic Inspection for Rails
3 Terms and Definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
Heat
All the blanks casted with one heat, excluding the first blank casted with the next heat entering into the tundish
3.2
Sequence
Continuous casting of different heats of the same designation in tundish
3.3
Transition area
Parts casted by two heats
3.4
Online heat-treatment
Heat treatment by which fine lamellar pearlite structures are obtained by direct accelerated cooling with the residual heat of rolling.
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Ordering Information
5 Model Dimension, Length, Weight and Limit Deviations
5.1 Model Dimension and Limit Deviations
5.2 Straightness and Distortion
5.3 Bolthole
5.4 Rail End Chamfering
5.5 Length and Weight
6 Technical Requirements
6.1 Manufacturing Method
6.2 Designation and Chemical Composition
6.3 Tensile Property
6.4 Hardness
6.5 Microstructure
6.6 Decarburized Layer
6.7 Nonmetallic Inclusion
6.8 Macrostructure
6.9 Drop Weight
6.10 Surface Quality
6.11 Ultrasonic Testing
6.12 Residual Stress of Foot
6.13 Fracture Toughness
6.14 Fatigue Crack Growth
6.15 Fatigue
6.16 Heat Treatment of Rail End
7 Test Method
7.1 Inspection Item, Inspection Frequency, Sampling Position and Test Method
7.2 Hydrogen Content
7.3 Total Oxygen Content and Nitrogen Content
7.4 Hardness
7.5 Microstructure
7.6 Drop weight
7.7 Ultrasonic Testing
7.8 Residual Stress at Rail Root
7.9 Fracture Toughness
7.10 Fatigue Crack Growth
7.11 Fatigue
8 Inspection Rules
8.1 Supervision
8.2 Type Inspection
8.3 Delivery Inspection
8.4 Re-inspection and Judgment
8.5 Numerical Rounding
9 Mark and Quality Certificate
9.1 Mark
9.2 Quality Certification
10 Quality Assurance
10.1 Quality Assurance System
10.2 Quality Guarantee Period
Appendix A (Normative) Type and Dimension of 43kg/m ~ 75kg/m Rails
Appendix B (Normative) Schematic Diagram for the Geometric Dimension Inspection Template of Rail
Appendix C (Normative) Unallowable Defects on the Transversal Acid Leached Test Plate of Rail
Appendix D (Normative) Test Method for Rail Plane Strain Fracture Toughness KIC
Appendix E (Normative) Heat-Treatment Technical Conditions for Rail End
Appendix F (Normative) Measured Method for Longitudinal Residual Stress of Foot
1 Scope
This standard specifies the terms and definitions, ordering information, model dimension and limit deviations, technical requirements, test methods, inspection rules, marking and quality certificate, quality assurance, etc. for 43 kg/m~75 kg/m rails.
This standard is applicable to 43 kg/m~75 kg/m hot-rolled and online heat-treated rails for railway with a maximum running speed of 160 km/h. For heat-treated rails for high speed railway, it may apply.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 223.14 Methods for Chemical Analysis of Iron, Steel and Alloy - The N-benzoy-N-phenylhydroxylamine Extraction Photometric Method for the Determination of Vanadium Content
GB/T 223.49 Methods for Chemical Analysis of Iron, Steel and Alloy Extraction Separation - Chlorophosphonazo mA Spectrophotometric Method for the Determination of the Total Rare Earth Content
GB/T 223.60 Methods for Chemical Analysis of Iron, Steel and Alloy - The Perchloric Acid Dehydration Gravimetric Method for the Determination of Silicon Content
GB/T 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy - The Butyl Acetate Extraction Photometric Method for the Determination of Phosphorus Content
GB/T 223.63 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium (Potassium) Periodate Photometric Method for the Determination of Manganese Content
GB/T 223.68 Methods for Chemical Analysis of Iron, Steel and Alloy - The Potassium Iodate Titration Method after Combustion in the Pipe Furnace for the Determination of Sulfur Content
GB/T 223.71 Methods for Chemical Analysis of Iron, Steel and Alloy - The Gravimetric Method after Combustion in the Pipe Furnace for the Determination of Carbon Content
GB/T 223.82 Steel and Iron - Determination of Hydrogen Content - Inert Gas Impulse Fusion Heat Conductivity Method
GB/T 226 Etch Test for Macrostructure and Defect of Steels
GB/T 228.1 Metallic Materials - Tensile Testing - Part 1: Method of Test at Room Temperature"
GB/T 230.1 Metallic Materials - Rockwell Hardness Test Part 1: Test Method
GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1: Test Method
GB/T 3075 Metallic Materials - Fatigue Testing - Axial-force-controlled Method
GB/T 4161 Plane strain Fracture Toughness KIC Test Method for Metal Material
GB/T 4336 Standard Test Method for Spark Discharge Atomic Emission Spectrometric Analysis of Carbon and Low-alloy Steel (Routine Method)
GB/T 4340.1 Metallic Materials-Vickers Hardness Test - Part 1: Test Method
GB/T 6398. STANDARD Test Method for Fatigue Crack Growth Rates of Metallic Materials
GB/T 10561-2005 Steel Determination of Content of Nonmetallic Inclusions Micrographic Method Using Standards Diagrams
GB/T 11261 Steel and Iron - Determination of Oxygen Content - The Pulse Heating Inert Gas Fusion-Infra-red Absorption Method
GB/T 13298 Metal-Inspection Method of Microstructure
GB/T 19001 Quality Management Systems Requirements
GB/T 20066 Steel and Iron - Sampling and Preparation of Samples for the Determination of Chemical Composition
GB/T 20123 Steel and Iron - Determination of Total Carbon and Sulfur Content Infrared Absorption Method after Combustion in an Induction Furnace (Routine Method)
GB/T 20124 Steel and Iron - Determination of Nitrogen Content - Thermal Conductimetric Method after Fusion in a Current of Inert Gas
YB/T 081 Rule for Rounding off of Numerical Values and Judgment of Testing Values for Technical Standards of Metallurgy
YB/T 951 Method of the Ultrasonic Inspection for Rails
3 Terms and Definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
Heat
All the blanks casted with one heat, excluding the first blank casted with the next heat entering into the tundish
3.2
Sequence
Continuous casting of different heats of the same designation in tundish
3.3
Transition area
Parts casted by two heats
3.4
Online heat-treatment
Heat treatment by which fine lamellar pearlite structures are obtained by direct accelerated cooling with the residual heat of rolling.
Contents of TB/T 2344-2012
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Ordering Information
5 Model Dimension, Length, Weight and Limit Deviations
5.1 Model Dimension and Limit Deviations
5.2 Straightness and Distortion
5.3 Bolthole
5.4 Rail End Chamfering
5.5 Length and Weight
6 Technical Requirements
6.1 Manufacturing Method
6.2 Designation and Chemical Composition
6.3 Tensile Property
6.4 Hardness
6.5 Microstructure
6.6 Decarburized Layer
6.7 Nonmetallic Inclusion
6.8 Macrostructure
6.9 Drop Weight
6.10 Surface Quality
6.11 Ultrasonic Testing
6.12 Residual Stress of Foot
6.13 Fracture Toughness
6.14 Fatigue Crack Growth
6.15 Fatigue
6.16 Heat Treatment of Rail End
7 Test Method
7.1 Inspection Item, Inspection Frequency, Sampling Position and Test Method
7.2 Hydrogen Content
7.3 Total Oxygen Content and Nitrogen Content
7.4 Hardness
7.5 Microstructure
7.6 Drop weight
7.7 Ultrasonic Testing
7.8 Residual Stress at Rail Root
7.9 Fracture Toughness
7.10 Fatigue Crack Growth
7.11 Fatigue
8 Inspection Rules
8.1 Supervision
8.2 Type Inspection
8.3 Delivery Inspection
8.4 Re-inspection and Judgment
8.5 Numerical Rounding
9 Mark and Quality Certificate
9.1 Mark
9.2 Quality Certification
10 Quality Assurance
10.1 Quality Assurance System
10.2 Quality Guarantee Period
Appendix A (Normative) Type and Dimension of 43kg/m ~ 75kg/m Rails
Appendix B (Normative) Schematic Diagram for the Geometric Dimension Inspection Template of Rail
Appendix C (Normative) Unallowable Defects on the Transversal Acid Leached Test Plate of Rail
Appendix D (Normative) Test Method for Rail Plane Strain Fracture Toughness KIC
Appendix E (Normative) Heat-Treatment Technical Conditions for Rail End
Appendix F (Normative) Measured Method for Longitudinal Residual Stress of Foot
