High-carbon high-chrome high-vanadium wearable surfacing self-shielded flux-cored wire

Abstract

The invention discloses a high-carbon high-chrome high-vanadium wearable surfacing self-shielded flux-cored wire. According to the flux-cored wire, the core is prepared from the following components in mass percentage: 5-25% of high carbon ferro-chrome, 30-60% of chromium carbide, 15-35% of ferrovanadium, 0.5-5% of ferromolybdenum, 1-4% of electrolytic manganese, 1-4% of ferrosilicon, 1-4% of ferroboron, 1-5% of graphite, 1-5% of aluminium magnesium, 0-3% of zircon sand, 0-4% of marble, 0-3% of barium fluoride, 0-5% of barium carbonate, 0-3% of sodium fluosilicate, and 0-5% of fluorite; the skin of the flux-cored wire is a mild-carbon steel strip, the diameter is 1.6-4.0mm, and the counterweight ratio is 44-53%. According to the flux-cored wire disclosed by the invention, the rigidity and wearability of surfacing alloy can be greatly improved and the toughness of the surfacing alloy cannot be reduced; and the prepared surfacing alloy can be widely applied to surfacing repair of parts with severe low and intermediate stress abrasion at low temperature, intermediate temperature and high temperature and manufacture of new parts.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and relates to a high-carbon, high-chromium, high-vanadium wear-resistant surfacing self-protecting flux-cored welding wire. Background technique [0002] Wear is one of the main causes of mechanical failure, of which abrasive wear accounts for more than 50%. With the development of modern industry, mechanical equipment and its parts have higher and higher requirements on the wear resistance of materials in use, and their service life has become an increasingly important factor affecting the production efficiency of mechanical equipment. According to the incomplete statistics of the five departments of my country's electric power, building materials, metallurgy, coal mining and agricultural machinery, the annual consumption of metal materials is more than 3 million tons, and the loss of energy consumption and shutdown due to replacement parts is as high as several billion yuan. Especia...

AI Technical Summary

Problems solved by technology

The traditional high-chromium cast iron surfacing alloy has low hardness, poor wear resistance, and high brittleness, and is easy to fall off during wear; the hardness of the high-chromium wear-resistant surfacing alloy containing boron can reach HRC60, but its brittleness is large, so that Its lifespan is greatly reduced

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