Production technology of wire rod for solid surfacing welding wires

Abstract

The invention discloses a production technology of a wire rod for solid surfacing welding wires. The wire rod comprises the components in percentage by weight as follows: 0.32-0.39% of C, 1.10-1.40% of Si, 0.80-1.10% of Mn, 1.10-1.40% of Cr, smaller than or equal to 0.025% of S, smaller than or equal to 0.025% of P, smaller than or equal to 0.30% of Ni, smaller than or equal to 0.25% of Cu, smaller than or equal to 0.10% of Mo and the balance of Fe and inevitable impurities. A process route comprises blowing by a converter, refining by an LF (ladle furnace), continuous casting and high-speed wire rolling. The solid surfacing welding wires produced through the technology have the advantages of low production cost, high deposition and welding efficiency, convenience in automatic operation and the like; according to the production technology of the wire rod for the solid surfacing welding wires, the component design of medium carbon and high silicon and chrome is adopted in chemical component, and the cost increase caused by addition of a large number of Ni, Mo, V, Ti alloys and the like in the past is avoided, so that the production technology has obvious economic benefits; the produced wire rod is stable in mechanical property, the tensile strength is 840-890 MPa, the elongation is 17%-20%, the area reduction is 60%-70%, the metallographic structure is F (ferrite) +P (pearlite), the grain size is grade 8.0-9.0, and the size deviation is + / -0.15 mm.

Description

technical field [0001] The invention belongs to the technical field of medium-carbon alloy steel wire rod and its manufacturing process, and in particular relates to a wire rod production process for solid-core surfacing welding wire. Background technique [0002] Some large-scale equipment and parts in the fields of machinery manufacturing, metallurgy, and electric power are subject to harsh working conditions and are often exposed to high temperature, high pressure, friction, and corrosion environments, and are prone to defects such as wear, cracks, and peeling. If not repaired in time, it will lead to The entire workpiece is scrapped, causing significant waste of resources and energy, and may also cause serious safety accidents. At the same time, such parts are usually heavy, expensive, and difficult to replace. As an important surface treatment technology, surfacing welding directly deposits a layer of metal layer on the damaged part to repair worn, peeled and cracked p...

AI Technical Summary

Problems solved by technology

A patent application number 96115704.6, titled "A kind of surfacing welding wire for hot work dies", relates to a kind of surfacing welding wire for repairing or pre-strengthening hot work dies; a patent application number 200910237100.5, titled The document "Submerged arc surfacing welding method and surfacing welding wire material for cold-rolled back-up rolls" involves roll manufacturing technology, which contains more alloys such as Ni, Mo, V, W, Nb, etc., and the cost is extremely high, and Flux cored welding wire is used

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