Hardfacing electrode covering and electrode containing same

Abstract

The invention discloses a hardfacing electrode covering and an electrode containing the same. The covering is prepared from the following components in percentage by mass: 14 to 18 percent of boron carbide, 28 percent of atomized iron powder, 0 to 6 percent of atomized ferrosilicon, 0 to 41 percent of high-carbon ferro-chrome, 0 to 33 percent of micro-carbon ferro-chrome, 0 to 20 percent of ferroniobium, 0 to 8 percent of cobalt powder, 3 to 9 percent of graphite powder, 0 to 4 percent of medium-carbon ferromanganese, 0 to 4 percent of ferrovanadium, and 0 to 20 percent of chromium metal. The hardfacing electrode covering disclosed by the invention is low in melting point, high in melting speed, convenient to perform welding and attractive in molding; metal on a surfacing layer of the hardfacing electrode covering has high hardness, high wear resistance and a certain brittleness resistance; moreover, in the using process, the hardfacing electrode covering is relatively high in cost performance. Meanwhile, the invention further discloses the electrode containing the hardfacing electrode covering and a preparation method of the electrode.

Description

technical field [0001] The invention relates to a wear-resistant surfacing welding material, in particular to a coating for a wear-resistant surfacing electrode, an electrode containing the coating, and a preparation method for the electrode. Background technique [0002] Screw propellers for extrusion in bamboo charcoal and rubber and plastic industries, concrete mixing blades, liners, concrete pump delivery S pipes, cutting rings, grinding discs in the production of quartz powder and silicon micropowder, hook bucket teeth, etc. The ferrous metal surface of the parts, due to the long-lasting and intense mutual extrusion and grinding of hard substances such as bamboo wood chips, lime, sand, iron filings, slag, rubber and plastic particles, quartz stone particles, etc., resulting in serious wear and tear. Particle wear and scratches, resulting in greatly shortened service life of these parts, resulting in huge economic losses. People use various methods to prevent this from ...

AI Technical Summary

Problems solved by technology

[0006] In terms of improving the deposition rate of surfacing electrodes, such as patent CN101073861A, it is realized by adding a large amount of iron powder (up to 72%) in the coating. Unfortunately, only 2-6% of boron carbide is contained in the coating, and the deposition efficiency is very high. The weld hardness and wear resistance can only have a higher value when the outer diameter of the coating increases. For example, taking the Φ4.0mm welding core as an example, the outer diameter of the coating should reach Φ9.0mm; if it is reduced, the hardness may be affected And wear-resistant effect, because boron carbide will be diluted when a large amount of iron powder in the molten droplet and molten pool is molten, causing its concentration to drop greatly, resulting in a decrease in hardness and wear resistance

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