Railway brake beam material XWQ470E and machining method

Abstract

The invention discloses a railway brake beam material XWQ470E and a machining method. The material comprises the following components: 0.12-0.20 of C, 0.25-0.35 of Si, 1.20-1.50 of Mn, P not more than 0.020, S not more than 0.010, 0.20-0.30 of Cr, 0.30-0.55 of Ni, Mo not more than 0.20, 0.08-0.14 of V, 0.015-0.035 of Al, 0.015-0.030 of Nb, and 0.001-0.03 of Ce; in a continuous casting and straightening procedure, the straightening temperature of a continuous-cast blank is controlled within 930-950 DEG C; the normalization temperature is 920+-20 DEG C; the continuous-cast blank is insulated by 40 minutes, and then, is cooled by air; and the tempering temperature is 480+-30 DEG C. The material is prepared through hot cutting, drawing and shaping by brand new component design and production process, and is excellent in manufacturability and stable in quality. In the component design process, such alloy elements as nickel, niobium, vanadium and rare earth are added, so that the overall toughness, the welding performance and the wear resistance of the material are improved, and the excellent application effect is achieved.

Description

technical field [0001] The invention relates to the technical field of material preparation, and is especially suitable for materials used in vehicles and a heat treatment method thereof, specifically a railway brake beam material XWQ470E and a processing method thereof. Background technique [0002] With the speed-up, heavy-duty and development of new-type freight cars, new models have more and more strict requirements on the braking and balancing brake beams. The dispersion is large, thus endangering the safety of train driving. For this reason, XWQ470E, a material for speed-up, heavy-duty, and new truck brake beams, was designed and developed. [0003] The current steel materials for truck brake beams may have the following problems during production and use: [0004] (1) The fatigue limit is low, and safe driving under speed-up and high-speed conditions cannot be guaranteed; [0005] (2) The material is prone to surface cracks after rolling; [0006] (3) The performa...

AI Technical Summary

Problems solved by technology

[0004] (1) The fatigue limit is low, and safe driving under speed-up and high-speed conditions cannot be guaranteed;

[0005] (2) The material is prone to surface cracks after rolling;

[0006] (3) The performance index of the material is low after thermal cutting and forming

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