Submerged-arc surfacing flux-cored wire and technology for composite production and reproduction of continuous casting rollers

A technology of submerged arc surfacing and flux-cored welding wire, which is applied to manufacturing tools, arc welding equipment, welding media, etc., can solve the problems of damage to the service life of continuous casting rolls, low production efficiency, and difficult operation of the welding process. To achieve the effect of benefiting the uniformity of weld structure and performance, reducing surfacing time, and reducing heat affected zone
CN109014654AActive Publication Date: 2018-12-18CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
Publication Date
2018-12-18

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Abstract

The invention discloses a submerged-arc surfacing flux-cored wire and a technology for composite production and reproduction of continuous casting rollers. The deposited metals of the flux-cored wirecomprises components in percentage by weight as follows: 0.02%-0.3% of C, 0.8%-2.8% of Mn, 0.1%-1.0% of Si, 12.0%-15.0% of Cr, 0.3%-2.0% of Mo, 1.5%-5.0% of Ni, 0.01%-1.5% of rare-earth elements, 0-1.2% of V and Nb, 0-0.16% of N, less than 0.03% of S, less than 0.03% of P and the balance of Fe. The technology comprises steps as follows: (1) rollers are turned into the size before surfacing; (2) the rollers are detected before surfacing; (3) the surfacing technology is determined, and technological parameters are determined according to the surfacing technology; (4) single-layer surfacing forming is performed; (5) components, hardness and structures of different positions after surfacing are detected. The technology is good in technological property and has the high cost performance.
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Description

technical field

[0001] The invention relates to a submerged-arc surfacing flux-cored welding wire for composite (re)manufacturing continuous casting rolls and a technique, belonging to the field of welding technology. Background technique

[0002] Continuous casting equipment has been widely used in major steel mills in my country. Continuous casting rolls are the main consumption parts in continuous casting equipment. Continuous casting rolls include three parts: crystallization section, sector section and horizontal section. Due to the dual role of cooling water, the working conditions are very harsh. Under the action of mechanical and thermal loads, the continuous casting rolls will have different degrees of network cracks, oxidation corrosion, wear damage and other damages on the roll surface during use, which will affect the continuous casting machine. Operating rate, product output and quality, unit roll consumption and rolled material cost.

[0003] Surfacing welding c...

Claims

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