METHOD FOR CONTACT RELIEF WELDING OF RAILS Russian patent published in 2022 - IPC B23K11/14 B23K101/26 E01B11/50 

FIELD: welding.

SUBSTANCE: invention relates to the field of welding and can be used in contact welding of rails made of carbon and alloy steels. After mechanical processing of the welded ends of the rails to ensure their perpendicularity to the axes of the rails, a relief is formed on one or both of the welded ends in the form of evenly spaced protrusions by cutting depressions with a depth of 1 to 7 mm. Then, heating and pulsed flash welding are carried out. The protrusions can be made in the form of a rectangle or a square. The number of protrusions at the end of the rail is selected from the condition of at least three in the minimum section of the rail neck.

EFFECT: method ensures uniform heating of contact surfaces with a complex shape and stability of the welding process.

3 cl, 5 dwg