Bainite steel wheel for rail traffic D-series high-speed train and manufacturing method thereof

A rail transit and bainite steel technology, applied in the field of rail transit, can solve the problems of randomness, cracking, and low fracture toughness in the detection of internal non-metallic inclusions

Pending Publication Date: 2018-11-13
MAGANG (GROUP) HOLDING CO LTD +1
View PDF8 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] High-speed wheels put forward strict requirements on internal inclusions and ultrasonically detectable defects, in order to prevent the generation of crack sources under high-speed running conditions, but the detection of internal non-metallic inclusions is random, and super-detection can find The defec

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bainite steel wheel for rail traffic D-series high-speed train and manufacturing method thereof
  • Bainite steel wheel for rail traffic D-series high-speed train and manufacturing method thereof
  • Bainite steel wheel for rail traffic D-series high-speed train and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] A kind of bainite steel wheel for rail transit EMU, containing the chemical composition as described in Table 2, Example 1.

[0070] The manufacturing method is as follows: the molten steel whose chemical composition is shown in Example 1 in Table 2 is passed through the steelmaking process, the refining process, the vacuum degassing process, the round billet continuous casting process, the ingot cutting process, the forging and rolling process, the heat treatment process, processing, and finished product inspection. formed by the process. The heat treatment process is as follows: heating to 920°C for 4.0 hours, cooling the rim tread to 220-400°C by spraying water under programmable control, and air cooling to room temperature, during which time the residual heat of the rim, web, and hub is used for self-tempering; and then Then heat to 270-400°C for medium and low temperature tempering for 4 hours, then air cool to room temperature after tempering.

[0071] Such as ...

Embodiment 2

[0073] A kind of bainite steel wheel for rail transit EMU, containing the chemical composition as described in Table 2, Example 1.

[0074] The manufacturing method is as follows: the molten steel whose chemical composition is shown in Example 2 of Table 2 is passed through the steelmaking process, the refining process, the vacuum degassing process, the round billet continuous casting process, the ingot cutting process, the forging and rolling process, the heat treatment process, processing, and finished product inspection. formed by the process. The heat treatment process is as follows: heating to 940°C for 4.3 hours, cooling the rim tread to 220-380°C by spraying water under programmable control, and air cooling to room temperature, during which the waste heat of the rim, web, and hub is used for self-tempering; and then Then heat to 250-360°C for medium and low temperature tempering for 4 hours, then air cool to room temperature after tempering.

[0075] Such as image 3 ...

Embodiment 3

[0078] A kind of bainite steel wheel for rail transit EMU, containing the chemical composition as described in Table 2, Example 1.

[0079] The manufacturing method is as follows: the molten steel whose chemical composition is as shown in Table 2, Example 3, goes through the steelmaking process, the refining process, the vacuum degassing process, the round billet continuous casting process, the ingot cutting process, the forging and rolling process, the heat treatment process, processing, and finished product inspection. formed by the process. The heat treatment process is as follows: heating to 920°C for 4.5 hours, cooling the rim tread to 200-385°C by spraying water under programmable control, and air cooling to room temperature, during which the residual heat of the rim, web, and hub is used for self-tempering; and then Then heat to 300-400°C for medium and low temperature tempering for 3.5 hours, then air cool to room temperature after tempering.

[0080] Such as Figure...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a bainite steel wheel for a rail traffic D-series high-speed train and a manufacturing method thereof. Chemical components of the bainite steel wheel comprise 0.05-0.30% of C,0.10-1.50% of Ni, 0.01-1.20% of Cr, 0.70-2.10% of Mn, 0.20-1.00% of Si, 0.01-1.00% of W, 0.05-0.60% of Mo, 0.01-0.80% of Cu, 0.01-0.20% of V, 0.001-0.20% of Nb, 0.0001-0.0350% of B, 0.001-0.040% of RE, smaller than or equal to 0.020% of P, smaller than or equal to 0.020% of S and the balance Fe and inevitable residual elements, and the sum of Mn and Cr is larger than or equal to 2.0% and smaller than or equal to 3.0%. According to the bainite steel wheel, the novel C-Ni-Mn-Cr-Mo alloy design system and the alloying principle are adopted, after the wheel is formed and subjected to advanced heattreatment, a rim obtains a no-carbide bainite structure, and the wheel has excellent comprehensive mechanical performance, anticorrosion performance and service performance, and especially has the beneficial effects of being high in strength, high in hardness, high in toughness, high in low-temperature toughness, high in wheeltrack rolling contact fatigue resisting performance (RCF), high in heatcrack resisting performance and the like.

Description

technical field [0001] The invention belongs to the technical field of rail transit, and relates to a bainitic steel wheel for a rail transit EMU and a manufacturing method thereof, in particular to a carbide-free bainitic wheel for a high-speed train with an axle load of ≤18t and a running speed of 200-350km / h Body steel wheel and method of manufacture thereof. Background technique [0002] Wheels are the "shoes" of rail transit and one of the most important walking parts, which directly affects the safety of operation, especially for high-speed wheels, which have strict requirements on the toughness index in order to ensure the safety of operation. There are differences between my country's railway lines and other countries. The maximum service temperature difference between the north and the south is over 80°C, the lowest winter temperature in the north is below minus 40°C, and the south is highly corrosive due to humid heat, which has more stringent requirements for whee...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/54C22C33/04B22C9/28C21D9/34
CPCB22C9/28C21D9/34C22C33/04C22C38/005C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/54Y02P10/20
Inventor 张明如程志远殷朝海赵海金友林张峰
Owner MAGANG (GROUP) HOLDING CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap