Self-protecting wearable flux-cored wire of hot-rolling blooming roll

Abstract

The invention relates to a self-protecting wearable flux-cored wire of a hot-rolling blooming roll. The flux-cored wire consists of a low-carbon steel outer skin and a flux core, and is characterized by comprising the following components in percentage by total mass of the flux-cored wire: 0.2 to 0.3 percent of C, 1.1 to 1.3 percent of Si, 1.5 to 1.8 percent of Mn, 6 to 7 percent of Cr, 1.4 to 1.6 percent of Mo, 0.5 to 1 percent of V, 1.2 to 2 percent of W, 5 to 6 percent of CaF, 2, 4 to 5 percent of TiO2, 0.45 to 0.6 percent of CaCO3, 0.4 to 0.6 percent of SiO2 and the balance of iron. The flux-cored wire has the advantage that the hardness of a surfacing alloy can be guaranteed to be more than HRC55.

Description

technical field [0001] This patent belongs to the technical field of welding materials B23k35, in particular to a self-protecting wear-resistant flux-cored welding wire for hot-rolled blanking rolls. Background technique [0002] Hot rolling is to heat a thick steel billet to 1000-1250 degrees Celsius to open the billet according to a certain shape. The rolls required for billet opening are called hot rolling billet rolls. The most common hot rolling is to use slabs (mainly continuous casting slabs) as raw materials, and roll the slabs into intermediate billets with a thickness of about 30-60mm through strip billet rolls, and then the next step of finishing rolling requires size of. The hot-rolled billet rolls of section steel rolls are usually composed of several different-shaped pass types to achieve reversible rolling. Due to the high rolling temperature, the roll needs to be water-cooled, so the hot roll is required to have sufficient thermal strength, wear resistance,...

AI Technical Summary

Problems solved by technology

The existing hot-rolled blanking roller repair surfacing welding wires on the market are all submerged arc welding wires, which need to be used with flux