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Common rail traffic bainite steel wheel used under cold and rigor service environment and manufacturing method of common rail traffic bainite steel wheel

A service environment, rail transit technology, applied in the field of rail transit, can solve problems such as easy expansion, cracking, traffic safety accidents, etc.

Inactive Publication Date: 2018-10-26
MAGANG (GROUP) HOLDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once a crack source appears inside the material, it is easy to expand and crack, causing traffic safety accidents

Method used

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  • Common rail traffic bainite steel wheel used under cold and rigor service environment and manufacturing method of common rail traffic bainite steel wheel
  • Common rail traffic bainite steel wheel used under cold and rigor service environment and manufacturing method of common rail traffic bainite steel wheel
  • Common rail traffic bainite steel wheel used under cold and rigor service environment and manufacturing method of common rail traffic bainite steel wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A kind of bainite steel wheel for rail traffic under cold and severe service environment, containing the chemical composition as described in Example 1 of Table 3.

[0073] The manufacturing method is as follows: the molten steel whose chemical composition is shown in Example 1 in Table 3 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 945°C for 4.1 hours, cooling the rim tread to 200-400°C by spraying water under programmable control, and air cooling to room temperature, during which the waste heat of the rim, spoke plate, and hub is used for self-tempering; and then Then heat to 320-400°C for medium and low temperature tempering for 4 hours, then air cool to room temperatu...

Embodiment 2

[0076] A kind of bainite steel wheel for rail traffic under cold and severe service environment, containing the chemical composition as described in Example 1 of Table 3.

[0077] The manufacturing method is as follows: the molten steel whose chemical composition is shown in Example 2 of Table 3 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 936°C for 3.5 hours, cooling the rim tread to 200-375°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 270-320°C for medium and low temperature tempering for 3.5 hours, then air cool to room temperature aft...

Embodiment 3

[0081] A kind of bainite steel wheel for rail traffic under cold and severe service environment, containing the chemical composition as described in Example 1 of Table 3.

[0082] The manufacturing method is as follows: the molten steel whose chemical composition is as shown in Table 3, 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 943°C for 4.0 hours, cooling the rim tread to 200-350°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 300-360°C for medium and low temperature tempering for 3.8 hours, then air cool to room temperature after ...

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Abstract

The invention discloses a common rail traffic bainite steel wheel used under the cold and rigor service environment and a manufacturing method of the common rail traffic bainite steel wheel. The common rail traffic bainite steel wheel comprises chemical components including 0.05%-0.30% of C, 0.50%-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, not larger than 0.020% of P, not larger than 0.020% of S and the balance Fe and inevitable residual elements, wherein the sum of Mn and Cr is larger than or equal to 2.0% and smaller than or equal to 3.0%. By adopting a new alloy design system and alloying principle of C-Ni-Mn-Cr-Mo, after thewheel is molded, a rim obtained after advanced heat treatment obtains a carbide-free bainite organization structure, and the wheel has the excellent comprehensive mechanical property, decay resistance and service performance, in particular has the high low-temperature toughness and low-temperature breaking toughness, meets performance and service safety requirement under the low-temperature environment and is suitable for the cold zone under rigor conditions.

Description

technical field [0001] The invention belongs to the technical field of rail transit, and relates to a bainitic steel wheel for rail transit in a cold and harsh service environment and a manufacturing method thereof, in particular to a cold and harsh service environment in which the minimum service temperature is -60°C A carbide-free bainitic steel wheel for rail transit and a manufacturing method 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 passenger wheels and high-speed wheels. Not lower than the toughness index under normal temperature conditions. The traditional wheel steel is medium-high carbon ferrite-pearlite steel, and the ductile-brittle transition temperature is around zero degrees Celsius. At present, the countries and regions where high-speed trains are put into use are mainly Europe, Japan and China. From the perspective...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/58C22C38/02C22C38/44C22C38/42C22C38/46C22C38/48C22C38/54C21D9/34C21D1/18B60B17/00
Inventor 张明如赵海谢世红肖锋方政张峰
Owner MAGANG (GROUP) HOLDING CO LTD
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