Dedicated self-shield flux-cored surfacing welding wire for manufacturing and repairing roll surface of squeeze roller of roller press

Abstract

The invention discloses a dedicated self-shield flux-cored surfacing welding wire for manufacturing and repairing a squeeze roller of a roller press. The dedicated self-shield flux-cored surfacing welding wire comprises a steel belt layer and a flux-cored layer; the dedicated self-shield flux-cored surfacing welding wire is characterized in that alloy elements of metal powders added in the flux-cored layer in mass percentage are respectively 70%-80% of ferrochrome, 1%-5% of ferromanganese, 1%-5% of ferrosilicon, 1%-3% of ferrovanadium, 1%-3% of ferromolybdenum, 0.5%-2% of rare earth and 8%-12% of graphite. The dedicated self-shield flux-cored surfacing welding wire disclosed by the invention has excellent wear-resisting performance and anti-strip performance, is convenient to weld and does not need any medium protection, the applicability of a welding wire is greatly increased, conditions are provided for realizing automatic welding of a large workpiece, the production efficiency is increased, and the service life of a roll surface of the squeeze roller of the roller press is prolonged.

Description

technical field [0001] The invention relates to a welding material, in particular to a welding wire used for manufacturing and repairing surfacing welding of the extrusion roller surface of a roller press. Background technique [0002] Roller press is a kind of grinding equipment for brittle materials, suitable for grinding cement clinker, granular blast furnace slag, cement raw materials, such as limestone, sandstone and shale, as well as gypsum, coal, quartz sand and iron ore. The material is mainly squeezed and crushed through the surface of the squeeze roller. During the extrusion and crushing process of the extrusion roller to the material, the extrusion roller surface is subject to periodic high-stress abrasive wear and fatigue damage, which eventually causes the extrusion roller to fail to work normally. Therefore, the surfacing layer on the roller surface is required to have better abrasive wear resistance and higher hardness. Generally, the hardness is require...

AI Technical Summary

Problems solved by technology

During the extrusion and crushing of materials by the extrusion roller, the surface of the extrusion roller is subject to periodic high-stress abrasive wear and fatigue damage, which eventually leads to the failure of the extrusion roller to work normally.

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