1 Scope
This standard specifies technical requirements, inspection methods, inspection rules, marking, quality certificate, storage, packaging and transportation for couplers and coupler yokes for railway rolling stock.
This standard is applicable to couplers and coupler yokes for newly-developed railway rolling stocks (for passenger and freight).
This standard is not applicable to tight lock couplers for passenger vehicles.
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 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223 Methods for Chemical Analysis of Iron, Steel and Alloy
GB/T 228.1 Metallic Material—Tensile Test—Part 1: Method of Test at Room Temperature(GB/T 228.1-2010, ISO 6892-1:2009, MOD)
GB/T 229 Metallic Materials—Charpy Pendulum Impact Test Method (GB/T 229-2007, ISO 448-1:2006, MOD)
GB/T 231.1 Metallic Materials—Brinell Hardness Test—Part 1: Test Method (GB/T 231.1-2009, ISO 6506-1:2005, MOD)
GB/T 5482 Test Method of Metallic Materials—Dynamic Tear
GB/T 6414-1999 Castings—System of Dimensional Tolerances and Machining Allowances (eqv ISO 8062:1994)
GB/T 6803 Test Method for Drop-weight Test to Determine Nil-ductility Transition Temperature of Ferritic Steels
GB/T 8923.1-2011 Preparation of Steel Substrates before Application of Paints and Related Products—Visual Assessment of Surface Cleanliness—Part 1: Rust Grades and Related Products—Uncoated Steel Substrates and of Steel Substrates after Overall Removal of Previous Coatings
GB/T 11352 Carbon Steel Castings for General Engineering Purposes
GB/T 15056 Evaluation Method on Cast Surface Roughness
GB/T15822.2 Non-destructive Testing—Magnetic Particle Testing—Part 2: Detection Media
HG/T 2453-1993 Alkyd Varnish
JB/T 8290 Non-destructive Testing Instruments—Magnetic Particle Flaw Detectors
TB/T 1669 Gauge for No.13 Coupler
TB/T 1670 Gauge for No.15 Coupler
TB/T 2451-1993 Metallographic Inspection for Non-metallic Inclusion in Cast Steel
TB/T 2604 Gauge for No.13A Type Coupler Yoke
TB/T 2942 General Technical Specifications of Steel Castings for Rolling Stock
TB/T 2943.1 Couplers Components for Railway Locomotive and Vehicle—Part 1: Specification of Knuckle Pivot Pin and Yoke Key
TB/T 2943.2 Couplers Components for Railway Locomotive and Vehicle—Part 2: Specification of Anticreep Top Locklift Assembly for No.13A Type Coupler
TB/T 2950 Coupler Connection Contour for Locomotives and Rolling Stock
TB/T 3212.2 Metallographic Atlas for Metallographic Microstructure Examination of Low Alloy Cast Steel for Rolling Stock—Part 2: Grades C Cast Steel
TB/T 3212.3 Metallographic Atlas for Metallographic Microstructure Examination of Low Alloy Cast Steel for Rolling Stock—Part 3: Grades E Cast Steel
TB/T 3420 Measuring tools for Type 16 and Type 17 Couplers
TB/T3461 Forged Coupler Yoke for Freight Rolling Stock of Railways
3 Technical Requirements
3.1 Basic Requirements
3.1.1 Couplers and coupler yokes shall be manufactured in accordance with the product drawing approved through established procedure.
3.1.2 The dimensions of coupler connection contour shall meet the requirements of TB/T 2950.
3.1.3 Coupler shall have functions of locking, unlocking and fully open and shall function well.
3.1.4 Coupler shall reliably prevent automatic uncoupling caused by vibration-incurred coupler lock and latch gear creep.
3.1.5 The maximum permanent deformation, minimum fracture load and minimum limit load of couplers and coupler yokes shall meet those specified in Table 1.
Table 1 Maximum Permanent Deformation, Minimum Fracture Load and Minimum Limit Load of Couplers and Coupler Yokes
Foreword i
1 Scope
2 Normative References
3 Technical Requirements
3.1 Basic Requirements
3.2 Material Requirements
3.3 Process Requirements
3.4 Surface Quality
3.5 Magnetic Particle Inspection
3.6 Repair Welding Requirements
3.7 Dimensional Tolerance
3.8 Metal Wear Plate Welding
3.9 Inner Compactness of the Casting
3.10 Casting Mass
3.11 Lubricating
3.12 Coating of Casting
4 Inspection Methods
4.1 Sample Preparation
4.2 Chemical Composition
4.3 Mechanical Properties
4.4 Hardness
4.5 Metallography
4.6 Fracture Toughness
4.7 Surface Quality and Magnetic Particle Inspection.
4.8 Geometric Dimensions
4.9 Inner Compactness of Casting
4.10 Tensile Test under Static Load
4.11 Vertical Load Test
4.12 Three States of Coupler Operation
4.13 Anti-creep Performance Inspection of Coupler
5 Inspection Rules
5.1 Type Inspection
5.2 Delivery Inspection
6 Marking and Quality Certificate
7 Storage, Packaging and Transportation
Annex A (Normative) Standard Pictures for Compactness of Steel Castings
Annex B (Normative) Magnetic Particle Inspection Method
1 Scope
This standard specifies technical requirements, inspection methods, inspection rules, marking, quality certificate, storage, packaging and transportation for couplers and coupler yokes for railway rolling stock.
This standard is applicable to couplers and coupler yokes for newly-developed railway rolling stocks (for passenger and freight).
This standard is not applicable to tight lock couplers for passenger vehicles.
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 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 223 Methods for Chemical Analysis of Iron, Steel and Alloy
GB/T 228.1 Metallic Material—Tensile Test—Part 1: Method of Test at Room Temperature(GB/T 228.1-2010, ISO 6892-1:2009, MOD)
GB/T 229 Metallic Materials—Charpy Pendulum Impact Test Method (GB/T 229-2007, ISO 448-1:2006, MOD)
GB/T 231.1 Metallic Materials—Brinell Hardness Test—Part 1: Test Method (GB/T 231.1-2009, ISO 6506-1:2005, MOD)
GB/T 5482 Test Method of Metallic Materials—Dynamic Tear
GB/T 6414-1999 Castings—System of Dimensional Tolerances and Machining Allowances (eqv ISO 8062:1994)
GB/T 6803 Test Method for Drop-weight Test to Determine Nil-ductility Transition Temperature of Ferritic Steels
GB/T 8923.1-2011 Preparation of Steel Substrates before Application of Paints and Related Products—Visual Assessment of Surface Cleanliness—Part 1: Rust Grades and Related Products—Uncoated Steel Substrates and of Steel Substrates after Overall Removal of Previous Coatings
GB/T 11352 Carbon Steel Castings for General Engineering Purposes
GB/T 15056 Evaluation Method on Cast Surface Roughness
GB/T15822.2 Non-destructive Testing—Magnetic Particle Testing—Part 2: Detection Media
HG/T 2453-1993 Alkyd Varnish
JB/T 8290 Non-destructive Testing Instruments—Magnetic Particle Flaw Detectors
TB/T 1669 Gauge for No.13 Coupler
TB/T 1670 Gauge for No.15 Coupler
TB/T 2451-1993 Metallographic Inspection for Non-metallic Inclusion in Cast Steel
TB/T 2604 Gauge for No.13A Type Coupler Yoke
TB/T 2942 General Technical Specifications of Steel Castings for Rolling Stock
TB/T 2943.1 Couplers Components for Railway Locomotive and Vehicle—Part 1: Specification of Knuckle Pivot Pin and Yoke Key
TB/T 2943.2 Couplers Components for Railway Locomotive and Vehicle—Part 2: Specification of Anticreep Top Locklift Assembly for No.13A Type Coupler
TB/T 2950 Coupler Connection Contour for Locomotives and Rolling Stock
TB/T 3212.2 Metallographic Atlas for Metallographic Microstructure Examination of Low Alloy Cast Steel for Rolling Stock—Part 2: Grades C Cast Steel
TB/T 3212.3 Metallographic Atlas for Metallographic Microstructure Examination of Low Alloy Cast Steel for Rolling Stock—Part 3: Grades E Cast Steel
TB/T 3420 Measuring tools for Type 16 and Type 17 Couplers
TB/T3461 Forged Coupler Yoke for Freight Rolling Stock of Railways
3 Technical Requirements
3.1 Basic Requirements
3.1.1 Couplers and coupler yokes shall be manufactured in accordance with the product drawing approved through established procedure.
3.1.2 The dimensions of coupler connection contour shall meet the requirements of TB/T 2950.
3.1.3 Coupler shall have functions of locking, unlocking and fully open and shall function well.
3.1.4 Coupler shall reliably prevent automatic uncoupling caused by vibration-incurred coupler lock and latch gear creep.
3.1.5 The maximum permanent deformation, minimum fracture load and minimum limit load of couplers and coupler yokes shall meet those specified in Table 1.
Table 1 Maximum Permanent Deformation, Minimum Fracture Load and Minimum Limit Load of Couplers and Coupler Yokes
Contents of TB/T 456-2016
Foreword i
1 Scope
2 Normative References
3 Technical Requirements
3.1 Basic Requirements
3.2 Material Requirements
3.3 Process Requirements
3.4 Surface Quality
3.5 Magnetic Particle Inspection
3.6 Repair Welding Requirements
3.7 Dimensional Tolerance
3.8 Metal Wear Plate Welding
3.9 Inner Compactness of the Casting
3.10 Casting Mass
3.11 Lubricating
3.12 Coating of Casting
4 Inspection Methods
4.1 Sample Preparation
4.2 Chemical Composition
4.3 Mechanical Properties
4.4 Hardness
4.5 Metallography
4.6 Fracture Toughness
4.7 Surface Quality and Magnetic Particle Inspection.
4.8 Geometric Dimensions
4.9 Inner Compactness of Casting
4.10 Tensile Test under Static Load
4.11 Vertical Load Test
4.12 Three States of Coupler Operation
4.13 Anti-creep Performance Inspection of Coupler
5 Inspection Rules
5.1 Type Inspection
5.2 Delivery Inspection
6 Marking and Quality Certificate
7 Storage, Packaging and Transportation
Annex A (Normative) Standard Pictures for Compactness of Steel Castings
Annex B (Normative) Magnetic Particle Inspection Method
