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

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 ...

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

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