Specialty carbon steel electrodes with a medium carbon content deposit

Abstract

The invention discloses a special carbon-steel welding rod with carbon content deposited metal, the welding rod comprises a welding core and a coating, wherein the welding core is a medium carbon steel core; the coating consists of the following components in percentage by weight: 7-12wt% of rutile, 42-48wt% of marbles, 18-22wt% of fluorite, 9-12wt% of ferrosilicon, 5-8wt% of electrolytic manganese, 1.5-2.8wt% of high carbon ferro-chrome, 2-4wt% of nickel powder, 0.8-1.5wt% of ferrotitanium, 0.3-1.0wt% of ferromolybdenum and the balance of Fe. The welding rod is applied to a base material for workpeice welding connection of medium carbon steel, so that the workpiece, which is subjected to thermal treatment and quenching, has welding seam hardness consistent with that of a workpiece base material, and therefore, the deposited metal is guaranteed to have enough carbon content, and to have relatively good toughness and crack resistance, and the welding quality of the workpiece is guaranteed.

Description

technical field [0001] The invention relates to metal welding materials, in particular to a special carbon steel welding rod with medium carbon content deposited metal. Background technique [0002] Welding rods are widely used in the welding of metal components. In some occasions where the welded steel structure needs surface quenching, such as the process roll of the cold rolling production line of the steel company, the material of the roll body is usually 45# steel or 50# steel. Use this type of steel plate Welding after coiling is round, because the welding consumables are generally low-carbon or ultra-low-carbon materials, the structure composition of the weld seam is very different from the base material of the roll body, resulting in a large difference in the hardness of the weld seam after the quenching of the roll body and the roll body When the surface coating treatment is carried out on the roller body, there will be obvious color difference on the surface of the...

AI Technical Summary

Problems solved by technology

At present, there is no medium-high-carbon alloy welding consumables for such purposes in the market, and the existing medium-high-carbon alloy welding materials are only surfacing electrodes suitable for surface surfacing wear-resistant fields, such as high-chromium cast iron electrodes, etc.