Novel process for high-efficiency surfacing composite manufacturing (remanufacturing) of continuous casting roll

Abstract

The invention discloses a novel process for high-efficiency surfacing composite manufacturing (remanufacturing) of a continuous casting roll. The novel process comprises the following steps that (1),a surfacing process is determined after surfacing process evaluation according to a parent metal, surfacing materials and a surfacing mode and method, and process parameters are determined according to the surfacing process; (2), the roll is turned to 0.1 mm to 3 mm above the surfacing size required by a drawing according to the surfacing process parameters and in combination with the drawing requirements; (3), roll inspection is carried out before welding, wherein non-destructive inspection of the size, parent metal compositions, performance and internal and external defects is carried out; (4), single-layer surfacing for one-time forming is carried out, wherein the single-side surfacing thickness of the roll after single-layer surfacing reaches the surfacing thickness of +0.5-2.5 mm specified in the drawing; and (5), according to the drawing requirements, the compositions, hardness and structure of different positions after butt welding are inspected according to the drawing requirements, and meanwhile flaw detection is carried out on a surfacing layer. By the adoption of the continuous casting roll produced by surfacing composite manufacturing (remanufacturing) of the process, the uniformity of structure and performance is facilitated, and the service life of the roll is prolonged; and the efficiency and cost performance can be improved.

Description

technical field [0001] The invention relates to a new technology for high-efficiency surfacing composite (re)manufacturing continuous casting rolls, in particular to a single-layer surfacing composite (re)manufacturing process for continuous casting rolls, and belongs to the technical field of roll surfacing composite (re)manufacturing. Background technique [0002] As the core component of the continuous casting equipment, the continuous casting roll is responsible for the task of conveying the continuous casting slab. However, the continuous casting roll is under the dual action of high-temperature steel slab and cooling water, and the working conditions are very harsh. Under the action of mechanical and thermal loads, the continuous casting During the use of casting rolls, due to the different degrees of network cracks, oxidative corrosion, wear damage and other damages on the roll surface, the rolls not only consume a lot of money and are expensive, but also the quality o...

AI Technical Summary

Problems solved by technology

The working layer of this design is generally the second layer + third layer of the cover wire, about 3-6mm, and the alloy composition and hardness in this area can meet the standard requirements; There are many welding defects, and the waste is serious, and the cost performance is low

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