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Steel rail for passenger and freight mixed transportation railway and manufacturing method of steel rail

A technology of mixed transportation of passengers and cargo, and a manufacturing method, which is applied in the field of rails, can solve problems such as poor performance of pearlitic rails, and achieve the effect of low equipment requirements, simple operation, and improved comprehensive performance of strength and toughness

Inactive Publication Date: 2018-02-09
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: in the prior art, the methods of different cooling rates in different temperature ranges are used to heat-treat the rails, and the obtained pearlitic rails have poor performance

Method used

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  • Steel rail for passenger and freight mixed transportation railway and manufacturing method of steel rail
  • Steel rail for passenger and freight mixed transportation railway and manufacturing method of steel rail
  • Steel rail for passenger and freight mixed transportation railway and manufacturing method of steel rail

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0038] Embodiment 1~6 uses the inventive method to manufacture the pearlitic steel rail for passenger-cargo mixed railway

[0039] The chemical composition of the pearlitic rail billets used in Examples 1 to 6 is shown in Table 1 below:

[0040] The chemical composition list (%) of pearlitic rail billet of table 1

[0041]

C

Si

mn

P

S

Cr

V / Ti / Nb

Example 1

0.82

0.37

0.70

0.011

0.007

0.44

0.03V

Example 2

0.85

0.19

0.88

0.012

0.005

0.15

0.04Nb

Example 3

0.70

0.60

1.05

0.013

0.006

0.27

0.019Ti

Example 4

0.77

0.52

0.94

0.010

0.006

0.38

0.07Nb

Example 5

0.80

0.15

0.77

0.015

0.008

0.50

0.10V

Example 6

0.74

0.44

0.98

0.011

0.007

0.22

0.009Nb

[0042] Roll the billets shown in the above table into 60kg / m rails, and cool them in the following way:

[0043] a. Rail rolling

[0044...

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PUM

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Abstract

The invention belongs to the technical field of steel rail manufacturing, and particularly relates to a steel rail for a passenger and freight mixed transportation railway and a manufacturing method of the steel rail. The manufacturing method of the steel rail for the passenger and freight mixed transportation railway aims to solve the problem that the toughness comprehensive performance of the pearlite steel rail prepared by the prior art is low, and comprises the following steps that a, a steel slab is subjected to hot rolling to be the steel rail, and the finish rolling temperature is 900-1000 DEG C; and b, when the temperature of the center of the top face of the steel rail is air-cooled to be 800-850 DEG C, jetting of cooling media is conducted on the top face of a railhead, the two side faces of the railhead and lower jaws on the two sides of the railhead correspondingly, cooling is conducted till the temperature of the center of the top face is 520-550 DEG C, and air cooling isconducted till the temperature of the center of the top face reaches the room temperature. According to the steel rail for the passenger and freight mixed transportation railway and the manufacturingmethod of the steel rail, the steel rail with the performance being more excellent is prepared and obtained through a mode that steel components are controlled, and accelerated cooling is conducted onthe two sections, and the steel rail is suitable for the passenger and freight mixed transportation railway.

Description

technical field [0001] The invention relates to a steel rail, more specifically, to a steel rail for a passenger-freight mixed railway and a manufacturing method thereof. Background technique [0002] The rapid development of railways puts forward higher requirements on the service performance of rails. With the continuous improvement of my country's high-speed railway network, the existing mixed passenger and freight trunk lines will gradually implement heavy-duty transformation. Large capacity, large axle load, and high density are the development direction of heavy-duty railways in the future. As a key component of the railway, the quality and performance of the rail are closely related to the transportation efficiency and driving safety of the railway. With the improvement of railway transportation capacity, the service environment of rails is becoming more and more harsh and complex, and various damages are prominent. Some rails in small-radius curved sections also suf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/04C22C38/02C22C38/04C22C38/28C22C38/26C22C38/24
CPCC21D9/04B21B1/085B21B1/22B21B2001/225C21D1/667C21D2211/009C22C38/02C22C38/04C22C38/24C22C38/26C22C38/28E01B5/02
Inventor 韩振宇邹明郭华袁俊
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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