GB/T 2585-2021 English PDF (GB/T2585-2021)

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GB/T 2585-2021: Hot-rolled steel rails for railway
GB/T 2585-2021
Hot-rolled steel rails for railway
ICS 77.140.60;45.080
H52
National Standards of People's Republic of China
Replace GB/T 2585-2007
Hot rolled steel rail for railway
Released on 2021-03-09
2021-10-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Ordering content 2
5 Category 2
6 Size, shape, weight and allowable deviation 3
7 Technical requirements 6
8 Test method 12
9 Inspection rules 16
10 Mark and Quality Certificate 18
Appendix A (Normative Appendix) Rail Section Type Dimension Drawing 20
Appendix B (Normative Appendix) Rail Dimension Inspection Sample Drawing 35
Appendix C (Normative Appendix) Rail Macrostructure Rating Chart 48
Appendix D (Normative Appendix) Test Method for Residual Stress of Rail Bottom 60
Appendix E (Normative Appendix) Rail Plane Strain Fracture Toughness (KⅠC) Test Method 62
Hot rolled steel rail for railway
1 Scope
This standard specifies the order content, classification, size, shape, quality and allowable deviation, technical requirements, test methods, and inspection of railway rails.
Inspection rules, signs and quality certificates.
This standard applies to 38kg/m~75kg/m symmetrical section hot-rolled steel rails and online heat-treated steel rails.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 222 The allowable deviation of the chemical composition of the finished steel
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy. The diantipyrine methane phosphomolybdic acid gravimetric method for the determination of phosphorus content
GB/T 223.5 Iron and steel-Determination of acid-soluble silicon and total silicon content-Reduced molybdosilicate spectrophotometric method
GB/T 223.9 Steel and alloy determination of aluminum content-Chromazurol S spectrophotometric method
GB/T 223.11 Determination of chromium content in iron, steel and alloy by visual titration or potentiometric titration
GB/T 223.12 Methods for chemical analysis of iron, steel and alloy. The sodium carbonate separation-diphenylcarbazide photometric method for the determination of chromium content
GB/T 223.14 Methods for chemical analysis of iron, steel and alloy-The tantalum reagent extraction spectrophotometric method for the determination of vanadium content
GB/T 223.18 Methods for chemical analysis of iron, steel and alloy. The sodium thiosulfate separation-iodometric method for the determination of copper content
GB/T 223.19 Methods for chemical analysis of iron, steel and alloy, neocuproine-chloroform extraction spectrophotometric method for the determination of copper content
GB/T 223.23 Iron, steel and alloy-Determination of nickel content-Dimethylglyoxime spectrophotometric method
GB/T 223.26 Steel and alloy determination of molybdenum content-Thiocyanate spectrophotometric method
GB/T 223.40 Steel and alloy determination of niobium content-Chloroiodophenol S spectrophotometric method
GB/T 223.54 Methods for chemical analysis of iron, steel and alloy-The flame atomic absorption spectrophotometric method for the determination of nickel content
GB/T 223.58 Methods for chemical analysis of iron, steel and alloy. The sodium arsenite-sodium nitrite titration method for the determination of manganese content
GB/T 223.59 Steel and alloy determination of phosphorus content-Bismuth phosphomolybdenum blue spectrophotometric method and antimony phosphomolybdenum blue spectrophotometric method
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 223.61 Methods for chemical analysis of iron, steel and alloy-The ammonium phosphomolybdate volumetric method for the determination of phosphorus content
GB/T 223.62 Methods for Chemical Analysis of Iron, Steel and Alloy-The Butyl Acetate Extraction Spectrophotometric 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 223.64 Determination of manganese content in iron, steel and alloy by flame atomic absorption spectrometry
GB/T 223.67 Steel and alloy determination of sulfur content-Methylene blue spectrophotometric method
GB/T 223.68 Methods for chemical analysis of iron, steel and alloy, the determination of sulfur content by potassium iodate titration after combustion in a tube furnace
GB/T 223.69 Steel and alloy carbon content determination after combustion in tube furnace gas volume method
GB/T 223.71 Methods for chemical analysis of iron, steel and alloy, the determination of carbon content by gravimetric method after combustion in a tube furnace
GB/T 223.72 Determination of Sulfur Content in Iron and Steel and Alloy Gravimetric Method
GB/T 223.76 Methods for chemical analysis of iron, steel and alloy. The flame atomic absorption spectrometric method for the determination of vanadium content
GB/T 223.82 Determination of hydrogen content of iron and steel inert gas fusion-thermal conductivity or infrared method
GB/T 224 Steel Decarburization Depth Measurement Method
GB/T 226 Steel Macrostructure and Defect Etching Test Method
GB/T 228.1 Tensile Test of Metallic Materials Part 1.Room Temperature Test Method
GB/T 230.1 Rockwell Hardness Test of Metallic Materials Part 1.Test Method
GB/T 231.1 Brinell Hardness Test of Metallic Materials Part 1.Test Method
GB/T 3075 Axial force control method for fatigue test of metallic materials
GB/T 4161 Plane strain fracture toughness KIC test method for metallic materials
GB/T 4336 Carbon steel and low- and medium-alloy steel determination of multi-element content Spark discharge atomic emission spectrometry (conventional method)
GB/T 6398 Fatigue crack growth method for fatigue test of metallic materials
GB/T 10561-2005 Determination of the content of non-metallic inclusions in steel Standard Grading Chart Microscopic Inspection Method
GB/T 11261 Determination of oxygen content of iron and steel pulse heating inert gas melting-infrared absorption method
GB/T 13298 Metal Microstructure Inspection Method
GB/T 20066 Sampling and sample preparation methods for the determination of the chemical composition of steel and iron
GB/T 20123 Determination of total carbon and sulfur content of iron and steel-Infrared absorption method after combustion in high-frequency induction furnace (conventional method)
GB/T 20124 Determination of nitrogen content of iron and steel inert gas fusion thermal conductivity method (conventional method)
GB/T 20125 Low-alloy steel-Determination of multi-element content-Inductively coupled plasma atomic emission spectrometry
YB/T 081 Rounding off the numerical value of metallurgical technology standards and judging the detection value
YB/T 951 Rail ultrasonic flaw detection method
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Heat
All slabs cast by one furnace of molten steel until a certain steel slab is completely cast by the next furnace of molten steel (excluding the billet).
3.2
Continuous pouring sequence
Continuous casting of molten steel of the same grade with different heat numbers in the tundish.
3.3
Onlineheat-treatment
The heat treatment process of using the rolling waste heat to directly accelerate the cooling to obtain the fine flake pearlite structure.
4 Order content
When ordering, the buyer should provide the supplier with the following information.
a) Product name;
b) Number of this standard;
c) Rail type and speed grade;
d) Grade and delivery status (hot rolling, heat treatment);
e) Rail end status (number of holes);
f) Quantity, length, short-length rate (fixed-length, non-fixed-length);
g) Other special requirements.
5 categories
According to the operating speed, it is divided into rails below.200km/h and rails above.200km/h.
9.3 Batching rules
Rails should be accepted in batches. Each batch is composed of steel rails rolled by billets of the same brand, the same model, and continuous casting of molten steel in several furnaces.
9.4 Re-inspection and judgment
9.4.1 Chemical composition
If the chemical composition and hydrogen content are unqualified, it should not be retested. When the oxygen and nitrogen elements are unqualified, each batch of steel shall be re-inspected, and the re-inspection results
The rails of qualified furnaces can be accepted, but the rails of unqualified furnaces shall not be accepted.
9.4.2 Tensile test
When the initial inspection result is unqualified, a re-inspection sample shall be taken from each of the other two rails in the same furnace for re-inspection. One of the retest samples
It should be taken from the steel rail rolled by the same strand as the initial sample, and another piece of re-test sample is sampled on the rail rolled by other strands. Two retest samples
When the inspection results meet the requirements of this standard, the furnace rail shall be accepted.
If the test results of the two retest samples do not meet the requirements of this standard, they should be sampled and retested. That is, the two inspection results of the same cast steel rail are both
When unqualified, the cast steel rail should not be accepted. If an inspection fails, the casting stream where the unqualified rail is located and the rolling of other streams
Continue to sample and inspect the steel rails in accordance with the above sampling method until they are qualified.
9.4.3 Decarburized layer, non-metallic inclusions
9.4.3.1 Decarburization layer
When the initial inspection fails, one sample shall be taken from each of the two adjacent rails in the same batch for re-inspection. The inspection results of the two samples are consistent
The remaining rails of this batch of rails can be accepted. If the result of the re-inspection test is unqualified, you can continue to take samples on the adjacent side rails for re-inspection.
Until qualified. The rail between the two retest samples shall not be accepted.
9.4.3.2 Non-metallic inclusions
When the initial inspection is unqualified, a re-inspection sample shall be taken from the other two rails of the same furnace in the initial inspection for re-inspection. The two samples for reinspection should be taken separately
On the rails rolled from the same casting stream and another casting stream from the initial inspection, if the re-inspection results of the two re-inspection samples are both qualified, the entire batch of rails is qualified. If where
If the test result of a sample is unqualified, the casting stream where the unqualified rail is located and the rails rolled by other casting streams shall continue to be sampled and inspected until
Until qualified. If the same cast steel rail fails in two inspection results, the cast steel rail shall not be accepted.
9.4.4 Low power
9.4.4.1 The white spot of the rail shall not be re-inspected.
9.4.4.2 When the initial macrostructure inspection does not meet the requirements of this standard, one sample shall be taken on the front and back sides of the sampling site for the initial inspection of the same cast stream.
Perform a reinspection. Of the two re-inspection samples, at least one of them is taken from the rail of the same casting billet as the initial inspection sample. The rails between the two re-inspection positions should not be
acceptance. If the re-inspection results of the two re-inspection samples meet the requirements, the rest of the batch of rails can be accepted. If there is a retest sample that does not match
Grid, you can continue to sample and re-inspect until it is qualified.
9.4.4.3 When the low-power structure defect is difficult to identify, further inspection can be performed at a higher magnification.
9.4.5 Microstructure
When the inspection result does not meet the requirements, the two adjacent rails in the same batch shall be sampled for re-inspection. If the test results of two specimens
If they are in compliance with the regulations, the batch can be accepted (except for the unqualified rails in the initial inspection). If one result of the sample test is unsatisfactory, continue
Take samples on adjacent rails and re-inspect them until they are qualified. The rails between the two retest samples shall not be accepted.
9.5 Numerical rounding
The rounding of mechanical property inspection results shall be carried out in accordance with the provisions of GB/T 228.1, and the numerical rounding of other inspection results shall be carried out in accordance with the regulations of YB/T 081.
Definitely proceed.
10 Mark and quality certificate
10.1 Logo
10.1.1 The following clear and raised signs shall be rolled on the waist of each rail at least every 4m, and the height of the characters shall be 20mm~
28mm, protrusion 0.3mm~1.5mm.
a) The logo of the manufacturer;
b) Rail type;
c) Steel grade;
d) Speed class (rails with operating speeds not less than.200km/h are marked with "G", and operating speeds are less than.200km/h
The rails are not marked);
e) Manufacturing year (two digits at the end of the rolling year) and month.
10.1.2 Rails that do not meet the requirements for operating speeds greater than or equal to.200km/h, but meet the requirements for operating speeds less than.200km/h can be lowered
It is used for rails with operating speeds less than.200km/h, but one hot-rolled mark "G" at each end of the rail should be ground and removed.
10.1.3 On the other side rail waist of each rail, the distance from the rail end is not less than 0.6m, and the interval is not more than 15m.
(Print) Press the following clear signs in order. The stamped characters should have a straight or arc-shaped surface, and the characters are 10mm~16mm high and deep.
0.3mm~1.5mm, width 1mm~1.5mm, the side should be inclined, the letters and numbers should ...