Pile-up welding flux-cored wire for restoring cold rolling intermediate roller operational layer and method for manufacturing same

Abstract

The invention relates to a welding drug core welding wire used to repair the working layer of cold rolling middle roller. Wherein, said welding wire comprises coat and drug core; said drug core comprises medium-carbon ferromanganese at 1.2-1.6%, high carbon ferro-chrome at 6.0-8.0%, ferro-molybdenum at 1.0-3.0%, ferro-vanadium at 0.7-1.5%, ferrocolumbium at 0.06-0.16%, ferrotungsten at 1.0-2.8%, ferrotitanium at 0.05-0.09%, nickel at 0.7-1.2%, silicon iron at 0.80-1.5%, rare-earth at 1.0-5.0%, derbyshire spar at 4.5-10.5%, and the left is iron powder. The invention has simple method, and the rigidity is HRC55-59, without crack.

Description

technical field [0001] The invention belongs to welding materials and a manufacturing method thereof, in particular to a surfacing flux-cored welding wire for repairing the working layer of a cold-rolled intermediate roll and a manufacturing method thereof. Background technique [0002] The cold-rolled intermediate roll is a key part of the parts required for the production of cold-rolled steel plates. It bears a large alternating stress during work, and the hardness of the roll body reaches HRC56-59. It also requires better anti-stripping ability. Therefore, the current Manufacturers generally use high-carbon low-alloy steel such as 9Cr3Mo to manufacture through forging and complicated heat treatment processes, which are expensive, and the annual consumption of cold-rolled intermediate rolls is large, and because of the difficulty of repairing, they are almost scrapped without repairing, resulting in Huge economic loss. [0003] The repair of cold-rolled intermediate rolls...

AI Technical Summary

Problems solved by technology

At present, there is no special working layer welding wire for cold-rolled intermediate roll repair