Method for manufacturing high-chromium alloy overlaying composite abrasion resistant plate

Abstract

The invention discloses a method for manufacturing a high-chromium alloy overlaying composite abrasion resistant plate and relates to an abrasion resistant plate technology. The front of a contact tube of a self-protecting flux-cored wire is provided with a powder feeding device; while swinging and overlaying, the self-protecting flux-cored wire, a spray cooling device and a scraping plate synchronously swing; when visible arc swing overlaying is carried out, the spray cooling device sprays cooling water, a powder feeding pipe conveys alloy powder out, and the alloy powder is uniformly distributed on the upper surface of the abrasion resistant base plate by the scraping plate; and the self-protecting flux-cored wire is mixed with the alloy powder, the ratio of the mass of the alloy powder to the mass of the welding wire is larger than 0.8, the mixture is distributed on the surface of the abrasion resistant base plate by visible arc overlaying to form an abrasion resistant layer, thus the composite abrasion resistant plate is obtained. The method of the invention has simplicity, easy operation, low cost, good water-cooling effect, guarantee of oriented growth of carbide and even as well as fine cracks, and the product has dual performances of a high-hardness material and a ductile material and long service life.

Description

technical field [0001] The invention relates to the technical field of wear-resistant plates, and relates to a method for manufacturing a high-chromium alloy surfacing composite wear-resistant plate. Background technique [0002] In industrial and mining enterprises, the loss caused by the wear and tear of metal parts is serious. According to incomplete statistics, the weight of metal lost due to mechanical wear and tear in the country reaches more than one million tons every year; The losses are also quite serious. [0003] The wear-resistant composite plate is an ideal material for manufacturing the working lining under extremely severe wear conditions. The surface of the wear-resistant composite plate is made of 40-70% chromium carbide (Vickers hardness 1650V) - the high-hardness wear-resistant skeleton is evenly distributed in the toughness Composed of better austenite structure, the macro hardness of the composite plate is 55-62HRC, the exact value depends on the diffe...

AI Technical Summary

Problems solved by technology

Open arc welding is easy to achieve water cooling, but to achieve the deposited metal composition, the alloy composition in the flux-cored wire must be increased. Since the filling rate of the flux-cored wire is constant, the deposited metal needs to be filled to get more chromium carbide. Higher chromium carbide, discarding the cheap high-carbon ferrochrome with less carbide content, which seriously increases the cost and small profit

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