Standard No.:	TB/T 2403-2010
English Name:	Brake shoes for fright rolling stock of railways
Chinese Name:	铁道货车用合成闸瓦
Professional Classification:	TB    Professional Standard - Railway Transport
Issued by:	MOR
Issued on:	2010-12-2
Implemented on:	2011-6-1
Status:	valid
Superseded by:	TB/T 3104.1-2020 Locomotive brake shoes Part 1: Synthetic brake shoes
Superseding:	TB/T 2404-1999
Language:	English
File Format:	PDF
Word Count:	7000 words
Price(USD):	140.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the terminologies, definitions and symbols, technical requirements, inspection and test methods, inspection rules and marking, packaging, transportation and storage of brake shoes for freight rolling stock of railways. This standard is applicable to brake shoes for freight rolling stock of railways with the maximum running speed of 120km/h and axle weight of 25t at maximum. Brake shoes for freight rolling stock of railways with axle weight greater than 25t may also refer to this standard. 2 Normative References The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition (including any amendments) applies to this document GB/T 700-2006 Carbon Structural Steels GB/T 1033.1-2008 Plastics - Methods for Determining the Density of Non-cellular Plastics - Part 1: Immersion Method, Liquid Pyknometer Method and Titration Method GB/T 1041-2008 Plastics - Determination of Compressive Properties GB/T 1043.1-2008 Plastics - Determination of Charpy Impact Properties - Part 1: Non-instrumented Impact Test GB/T 2918-1998 Plastics - Standard Atmospheres for Conditioning and Testing GB/T 3398.2-2008 Plastics - Determination of Hardness - Part 2: Rockwell Hardness GB/T 4617-2009 Plastics - Phenolic Mouldings - Determination of Acetone-soluble Matter GB/T 6040-2002 General Rules for Infrared Analysis GB/T 9341-2008 Plastics - Determination of Flexural Properties TB/T 449 Wheel Profile for Locomotive and Car TB/T 2456.20-2006 Brake Shoe Plate for Railway Rolling Stock ISO 11358:1997 Plastics - Thermogravimetry (TG) of Polymers - General principles 3 Terminologies, Definitions and Symbols For the purposes of this document, the following terminologies and definitions apply. 3.1 Instantaneous friction coefficient The function of speed. It is the ratio of braking force to the brake shoe thrust at every instant during the braking process, expressed in φk.

Foreword i 1 Scope 2 Normative References 3 Terminologies, Definitions and Symbols 4 Classification and Application Requirements 5 Technical Requirements 5.1 Structure and Boundary Dimension 5.2 Appearance 5.3 Usage 5.4 Physical and Mechanical Properties 5.5 Brake Friction and Abrasion Properties 5.6 Bonding Strength of Friction Piece and Shoe Back 5.7 Materials and Manufacturing 6 Inspection and Test Methods 6.1 Appearance Inspection 6.2 Boundary and Fit Dimension Inspection 6.3 Physical and Mechanical Properties Test 6.4 Bonding Strength Test of Friction Piece and Shoe Back 6.5 Brake Friction and Abrasion Properties Test 6.6 Infrared Spectrum Analysis 6.7 Thermogravimetric Analysis 7 Inspection Rules 7.1 Delivery Inspection 7.2 Periodic Inspection 7.3 Type Inspection 7.4 Line Usage Assessment 8 Marking, Packaging, Transportation and Storage 8.1 Marking 8.2 Packaging 8.3 Transportation and Storage Appendix A (Normative) Boundary and Fit Dimension of Brake Shoe Appendix B (Normative) Permissible Range of the Instantaneous Friction Coefficient of Brake Shoe Appendix C (Normative) Sampling Positions of Physical and Mechanical Properties Specimen Appendix D (Normative) Determination Method of Compression Modulus Appendix E (Normative) Test Method for Bonding Strength of Friction Piece and Shoe Back Appendix F (Normative) Brake Friction Property Test Methods References