High-carbon high-chromium high-niobium cast iron self-protecting flux-cored wire

Abstract

The invention provides a high-carbon high-chromium high-niobium cast iron self-protection flux-cored wire. The flux-cored wire has a steel belt as an outer skin. The flux core comprises the following components in weight percentage: 10 to 30 percent of ferroniobium, 20 to 30 percent of high carbon ferrochrome, 0.1 to 3 percent of V, 0.2 to 3 percent of W, 0.6 to 0.8 percent of ferromanganese, 0.2 to 0.8 percent of 75 ferrosilicon, 20 to 30 percent of chromium carbide, 5 to 12 percent of graphite, 1 to 10 percent of aluminum-magnesium alloy, 1 to 5 percent of silicon carbide and 1 to 3 percent of ferroboron; and the percentage of a counter weight is between 46 and 54 percent. The high-carbon high-chromium high-niobium cast iron self-protection flux-cored wire has the advantages of high hardness, good wear resistance, good oxidation resistance and strong shock resistance, and is widely applied to grinding rolls and grinding disks of coal grinding machines in thermal power plants and cement plants, material charging equipment in blast furnaces(material charging slots, receiving cones, material storage areas and sieve plates), slag vertical mills, hammer heads and rollers of crushers and sintering equipment workpieces in steel plants.

Description

technical field [0001] The invention belongs to the field of high-hardness material welding, and relates to a welding wire, in particular to a self-protected surfacing flux-cored welding wire containing high-carbon, high-niobium-chromium-iron. The content of niobium in the cladding metal is greater than 5%, has high hardness and belongs to the field of welding in material processing engineering. Background technique [0002] Workpieces of sintering equipment in steel mills, grinding rollers and grinding discs of coal mills in thermal power plants and vertical grinding rollers in cement plants, grinding disc lining tiles, blast furnace feeding equipment (feeding trough, material bell, material storage area, sieve plate), slag In many equipments such as vertical mills, crusher hammers and rollers, excavator shovel teeth, wear-resistant steel plates, etc., there are surfacing welding repairs for low, medium and high temperature severely wear-resistant workpieces. Among the met...

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Problems solved by technology

[0009] The purpose of the present invention is to provide a high-carbon, high-chromium, high-niobium cast iron self-shielding flux-cored wire to overcome the difficulties of high-carbon, high-carbon, ferrochrome self-shielding flux-cored wire containing niobium, such as sticky slag, large spatter, and poor wettability.

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