Welding production method of bainite steel rails

Abstract

The invention discloses a welding production method of bainite steel rails. The welding production method comprises the following steps that the first bainite steel rail and the second bainite steel rail are machined; a first mounting end and a second mounting end abut against a mounting face parallel to the horizontal plane, and the end face of a first welding end and the end face of a second welding end are placed in an abutting mode; the first welding end is obliquely arranged upwards, and the inclination angle between the first welding end and the mounting face is an acute angle beta 1; the second welding end is obliquely arranged upwards, the inclination angle between the second welding end and the mounting face is an acute angle beta 2, and beta 2 is equal to beta 1; the end face of the first welding end and the end face of the second welding end are in butt joint and welded, and a welding connector is formed; and the cooled welding connector is subjected to tempering process treatment. According to the welding production method of the bainite steel rails, the straightness of the welding connector of the bainite steel rails, the structural stress of the welding connector of the bainite steel rails and the service life of the welded bainite steel rails are guaranteed, and the rail replacement overhaul cost is reduced.

Description

technical field [0001] The invention relates to the technical field of rail welding, and more specifically, relates to a welding production method for bainite rails. Background technique [0002] Bainitic rails have good wear resistance and anti-stripping properties. If bainitic rails are applied to railway rails, the service life of heavy-duty railway rails can be improved, and the cost of rail replacement and overhaul can be reduced. [0003] Railway rails require several rails to be welded together in sequence to make long rails that can be used. When the rails are welded, a weld joint is formed at the weld, and due to the influence of welding high temperature and deformation, a certain amount of deformation will occur at the weld joint, affecting its straightness. At present, due to the relatively high yield strength of bainitic rails, if the welded joints of the welded bainitic rails are straightened to make the straightness of the welded joints meet the requirements o...

AI Technical Summary

Problems solved by technology

At present, due to the relatively high yield strength of bainitic rails, if the welded joints of the welded bainitic rails are straightened to make the straightness of the welded joints meet the requirements of the railway industry standard (railway industry standard TB / T1632.1 -2014), the above-mentioned straightening force produces plastic deformation, and then there is a risk of cracking in the welded joint; A large amount of brittle structures such as martensite will be generated inside the weld of the bainite rail, which will lead to the risk of fatigue fracture of the weld during use

Images