Explosive core of heat-resisting wear-resistant flux-cored wire

Abstract

The invention relates to a raw material composition of a flux core of an ovenproof and wearable flux-cored welding wire. Ferro-titanium powder accounts for 48 to 56 percent of the total weight of the flux core; ferrochrome powder accounts for 28 to 32 percent; coke powder accounts for 1 to 2 percent; ferrosilicon powder accounts for 4 to 8 percent; silicon-manganese alloy accounts for 2 to 8 percent; niobium powder accounts for 0.8 to 4 percent; nickel powder accounts for 0.6 to 5 percent; ferrovanadium powder accounts for 1 to 4 percent; rare earth accounts for 0.1 to 0.5 percent; rutile accounts for 0.1 to 0.3 percent; marble accounts for 0.1 to 0.6 percent; fluorite powder accounts for 0.1 to 0.8 percent; isinglass accounts for 0.1 to 0.6 percent; the heat resistance of the produced welding wire reaches 1,200 DEG C, the hardness reaches over 52 HRC; and the welding wire has extremely strong inoxidizability, heat resistance and fatigue impact performance.

Description

technical field [0001] The invention relates to a metal surfacing material, in particular to a flux core of a heat-resistant and wear-resistant flux-cored welding wire. Background technique [0002] In the welding industry, it is often necessary to manufacture or repair the surface of parts with poor surface wear resistance and high temperature resistance. The welding materials used include coated welding bridges, solid welding wires and flux-cored welding wires. Among them, the surfacing welding operation of the coating welding bridge is simple, flexible and convenient, but the disadvantage is low efficiency; the solid welding wire has strong rigidity and good process performance, but the excessive alloying elements are limited; the composition of the flux-cored welding wire is easy to adjust, and the required composition can be obtained according to the needs surfacing alloy, and submerged arc or gas shielded welding has high deposition efficiency, which is more suitable f...

AI Technical Summary

Problems solved by technology

Among them, the surfacing welding operation of the covered welding bridge is simple, flexible and convenient, but the disadvantage is low efficiency; the solid welding wire has strong rigidity and good process performance, but the excessive alloying elements are limited; the composition of the flux-cored welding wire is easy to adjust, and the required composition can be obtained according to the needs surfacing alloy, and submerged arc or gas shielded welding has high deposition efficiency, which is more suitable for enterprise production

At present, the raw materials of the existing flux-cored welding wire are mainly composed of high-carbon ferrochrome, nickel powder, silicon rare earth, lead powder, ferromolybdenum, ferro-titanium, etc. Some welding wires contain toxic gases, which are harmful to the human body. Gas protection, large splash, drug skin is not easy to fall off

The temperature resistance of the existing heat-resistant steel welding wire is usually below 1100°C. For example, the solid welding wire H25Cr3Mo2MnV used by domestic steel and electric power companies to repair rolls still has low wear resistance in high-temperature environments, and the working time is too short. The rolls are often replaced. This greatly affects the production efficiency