Large rooler hard-surface build-up welding repairing method

Abstract

The present invention relates to a large roll hard face surfacing welding repairing method, in the concrete, according to a certain process, on the surface of roll three layers of materials, basic layer, transition layer and hard-face layer, are successively deposited, and its surface welding rod copmosition contains C, Cr, Si, Mn, S and Fe, etc. Its repairing effect of large roll is good, its component cost is reduced, and the service life of the large roll can be prolonged.

Description

technical field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for repairing hard surface welding of large rolls. Background technique

[0002] Metallurgical rolls are the key parts of steel rolling equipment in iron and steel enterprises. The quality and service life of the rolls affect the operating rate of the rolling mill, the quality of the steel, and the maintenance cost of the equipment, which will directly affect the cost of the steel. The working surface of the roll is subject to working pressure, impact, wear, heat, etc. After a second period of working time, the roll surface will be damaged. Therefore, it needs to be repaired by surface surfacing technology.

[0003] At present, some large-scale rolls in iron and steel plants are made into new rolls at one time, and they are directly scrapped after use. No domestic manufacturer has successfully repaired them, no matter whether the base material ...