Flux-cored wire used for repairing continuous casting hollow foot roller sleeve, and cladding process of flux-cored wire

Abstract

The invention discloses a flux-cored wire used for repairing a continuous casting hollow foot roller sleeve, and a cladding process of the flux-cored wire. The flux-cored wire is prepared from self-fluxing alloy powder and a particle modificator; and the self-fluxing alloy powder is prepared from a mixture of carbon, chrome, nickel, silicon, boron, molybdenum, cobalt, niobium and tantalum, and thebalance of iron. A cladding method comprises the steps: 1, the surface of a roller sleeve base body is subjected to lathe polishing in a machining mode; 2, the flux-cored wire is cladded on the outersurface of the continuous casting hollow foot roller sleeve base body; and 3, a clad layer is polished to enable the roughness of the outer surface of the clad layer to reach 6.3. Through a coaxial lateral powder feeding method, a metallurgically bonded alloy coating is formed on the surface of the continuous casting hollow foot roller sleeve of a plate blank; and the iron-based flux-cored wire prepared from the self-fluxing alloy powder and the particle reinforced modificator, namely chromium nitride is selected as the coating, after cladding, a nitride is contained in the coating, and the properties of overall high-temperature fatigue resistance, impact abrasion resistance and corrosion resistance of a continuous casting roller are improved.

Description

technical field [0001] The invention relates to the technical field of continuous casting hollow foot roller sleeve repair materials, in particular to a flux-cored welding wire for repairing continuous casting hollow foot roll sleeves and a cladding process thereof. Background technique [0002] The continuous casting hollow foot roll is an important part of the crystallizer equipment in the continuous casting steel process. The hardness and strength of the surface put forward higher requirements. Due to the small diameter, thin wall and long axial dimension of the foot roller sleeve, it is difficult to adopt traditional repair methods. In the prior art, open arc surfacing welding is generally used for continuous welding. The above welding method is easy to cause bending of the shaft body Deformation, the axial shrinkage at both ends is reduced to 10-20mm, and it needs to be extended to solve it, which is time-consuming and labor-intensive; some repair techniques use therma...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technology adopts the technical means of surfacing welding. Although the bending deformation of the workpiece is reduced and the uniformity of the surface hardness of the workpiece is improved, there is still a technical problem of workpiece deformation, and the increase of the heat treatment process increases the cost. Based on the existing technology of the prior art Problem, the present invention proposes a flux-cored welding wire and its cladding process for repairing continuous casting hollow foot roller sleeves