Production and processing method of pearlitic steel rail and lifting and moving steel lifting machine

Abstract

The invention discloses and relates to the technical field of metal heat treatment and particularly relates to a pearlite steel rail production treatment method and a lifting steel lifting and shifting machine thereof. The method comprises the followings steps that a, rolled pearlite steel rails are placed on a lifting steel lifting and shifting machine; b, during conveying of the pearlite steel rails, the lifting steel lifting and shifting machine applies acting force on the steel rails, so that S-shaped bending deformation or circular-arc bending deformation of the pearlite steel rails in the horizontal plane is achieved; c, the pearlite steel rails are conveyed to an inlet of a heat treatment unit; and d, the pearlite steel rails are fed into the heat treatment unit, and a cooling device is arranged in the heat treatment unit and used for cooling the pearlite steel rails in an accelerated mode. The strength and tenacity of the steel rails can be improved through bending deformation,an accelerated cooling medium is applied to the pearlite steel rails through the cooling device, the comprehensive performance of the steel rails is improved, the fatigue damage probability of the pearlite steel rails is lowered, and the overall service lives of the steel rails are prolonged.

Description

technical field [0001] The invention relates to the technical field of metal heat treatment, in particular to a method for producing and treating pearlite rails and a lifting and moving steel lifting machine thereof. Background technique [0002] At present, my country's railways are in a stage of rapid development. High-speed passenger railways, passenger-freight mixed railways, and heavy-duty freight railways are all undergoing rapid and large-scale construction, and the demand for steel rails is increasing. [0003] Pearlitic rails have good mechanical properties and contact fatigue resistance, and have a high service life, and are increasingly used. The production process of pearlitic steel rail is as follows: firstly, smelting by converter, LF refining, then RH vacuum treatment, continuous casting to obtain billet, and finally rolling and heat treatment for billet. At present, the rolled pearlitic rail is cooled by air cooling, the cooling rate is not uniform, the perf...

AI Technical Summary

Problems solved by technology

At present, the rolled pearlitic rail is cooled by air cooling, the cooling rate is not uniform, the performance of the rail is poor, and it is easy to generate large residual stress, which affects the straightness of the rail and increases the occurrence of contact fatigue damage probability, affect the overall performance of the rail, and reduce the overall service life of the rail

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