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Heavy-duty locomotive wheel steel resistant to surface contact fatigue and wheel production method

A heavy-duty locomotive, surface contact technology, applied in furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problem of high incidence of wheel tread peeling, achieve high incidence of tread peeling, reduce unplanned turning repair frequency, and simple process easy effect

Active Publication Date: 2021-10-22
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Another object of the present invention is to provide a method for producing wheels using heavy-duty locomotive wheel steel that is resistant to surface contact fatigue. The anti-surface contact fatigue peeling performance of the wheel is obviously better than that of traditional locomotive wheels, and solves the problem of high incidence of tread peeling of traditional locomotive wheels. , improve the anti-surface contact fatigue performance of heavy-duty locomotive wheels, reduce the frequency of unplanned wheel repairs, and prolong the service life of wheels

Method used

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  • Heavy-duty locomotive wheel steel resistant to surface contact fatigue and wheel production method
  • Heavy-duty locomotive wheel steel resistant to surface contact fatigue and wheel production method
  • Heavy-duty locomotive wheel steel resistant to surface contact fatigue and wheel production method

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Embodiment 1- Embodiment 3

[0043] A heavy-duty locomotive wheel steel resistant to surface contact fatigue, including the following components in mass percentages, as shown in Table 1, and the balance not shown in Table 1 is Fe and unavoidable impurities.

Embodiment 1

[0057] Embodiment 1 and comparative example 1 wheel samples wear amount under different cycles times as Figure 4 shown. It can be seen that under the same experimental conditions, the wear rate of the wheel sample of Example 1 is slightly higher than that of Comparative Example 1, which conforms to the invention design of balancing and coordinating the "competitive relationship between wear and contact fatigue". The weight loss and contact fatigue crack density and crack depth of the wheel samples of Example 1 and Comparative Example 1 after the dry grinding + water lubrication combined contact test are shown in Table 3, and the surface contact fatigue cracks and longitudinal section crack morphology, microstructure and plasticity The shape of the longitudinal section of the deformed layer is as follows: Figure 5-10 shown. It can be seen that the wheel material of Example 1 is more resistant to initiation and propagation of contact fatigue cracks than the wheel material of...

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Abstract

The invention provides heavy-duty locomotive wheel steel resistant to surface contact fatigue and a wheel production method. Components of the wheel steel comprise 0.60%-0.67% of C, 0.15%-1.00% of Si, 0.60%-0.90% of Mn, 0.04%-0.15% of V, 0.10%-0.25% of Cr, not larger than 0.040% of Al, not larger than 0.015% of Als, (70-100) * 10 <-4 >% of N, not larger than 0.003% of Ti, not larger than 0.020% of P, not larger than 0.015% of S and the balance Fe and inevitable impurity elements. In wheel production, the austenitizing soaking temperature is 30-50 DEG C higher than the conventional heating temperature, and the holding time of the soaking section is not shorter than 1.5 h. Compared with the prior art, the surface contact fatigue resistance of the wheel is obviously superior to that of a traditional locomotive wheel, the non-planned turning repair frequency of the wheel is reduced, and the service life of the wheel is prolonged.

Description

technical field [0001] The invention belongs to the technical field of railway wheel preparation, and in particular relates to a heavy-duty locomotive wheel steel and a wheel production method capable of resisting surface contact fatigue. Background technique [0002] The locomotive wheel is one of the key parts of the locomotive, and its service conditions are very different from other wheels, and it is the main transmission of traction power and braking force. For locomotives towing heavy-duty freight trains, due to the high traction coefficient and large traction moment, the maximum shear stress borne by the wheels is on the tread surface and at a higher level. Therefore, the susceptibility of heavy-duty locomotive wheels to surface contact fatigue damage is significantly higher than that of other-purpose wheels, and the tread peeling caused by contact fatigue cracks on the surface is a common and frequent failure mode of locomotive wheels. [0003] Tread peeling causes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/24C21D9/34C21D1/18C22C38/22C22C38/20C22C38/46C22C38/44C22C38/42
CPCC22C38/02C22C38/04C22C38/24C21D9/34C21D1/18C22C38/22C22C38/20C22C38/46C22C38/44C22C38/42C21D2211/009C21D2211/005
Inventor 江波姚三成邹强刘学华赵海万志健杜松林陈刚丛韬张关震
Owner MAANSHAN IRON & STEEL CO LTD
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