Method for repairing open arc welding and surfacing of continuous casting roller of continuous casting fan-shaped section

A repair method and technology of continuous casting rolls, which are applied in the direction of arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of easy cracks on the weld surface, complex submerged arc welding process, and unsuitability for multiple repairs, etc., and achieve good results. Effects of toughness, increased service life, and improved productivity

Inactive Publication Date: 2014-08-27
上海一钢机电有限公司 +1
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The submerged arc welding process is more complicated (requires preheating before welding, heat treatment after welding), and the factory needs to increase heat treatment equipment
Cracks are prone to appear on the surface of the weld, and the service life is short, so it is not suitable for multiple repairs

Method used

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  • Method for repairing open arc welding and surfacing of continuous casting roller of continuous casting fan-shaped section
  • Method for repairing open arc welding and surfacing of continuous casting roller of continuous casting fan-shaped section
  • Method for repairing open arc welding and surfacing of continuous casting roller of continuous casting fan-shaped section

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Embodiment Construction

[0045] see Figure 1 to Figure 4 , a continuous casting segment continuous casting roll open arc welding repair method of the present invention, comprising the following steps:

[0046] 1. Selection of welding materials

[0047] Select the appropriate welding material, among which, the transition layer is 430-O, Welding wire; the working layer is 414N-O, welding wire.

[0048] 2. Open arc welding surfacing process

[0049] 2.1 Inspection before continuous casting roll welding, check whether there is oil stain, rust and crack on the roll surface.

[0050] 2.2 Fabrication of the arc ignition circle

[0051] The arc starting ring is made of low-carbon φ10mm round steel. The outer circle of the arc starting ring 30 is 11mm smaller than the nominal size of the continuous casting roll 10. The arc starting ring is welded to the end face of the continuous casting roll. 0.5mm; Welding with J502 electrode, electrode diameter Use an AC / DC welding machine with a welding current ...

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Abstract

A method for repairing open arc welding and surfacing of a continuous casting roller of a continuous casting fan-shaped section includes the following steps of (1) welding material selection, (2) open arc welding and surfacing processing and (3) roller surface welding. By means of the method for repairing open arc welding and surfacing, a surfacing layer of the continuous casting roller has high anti-stripping performance, good abrasion resistance, good fatigue resistance and good machinable performance, production efficiency is high due to surfacing, the requirement for multiple times of surfacing repairing can be met, and the service life of the continuous casting roller after surfacing repairing is not shorter than that of an original roller.

Description

technical field [0001] The invention relates to continuous casting equipment, in particular to a method for repairing continuous casting rolls by open arc welding in continuous casting segments. Background technique [0002] The working conditions of the continuous casting rolls are extremely harsh. The surface temperature of the continuous casting slab from the crystallizer to the sector is about 850-1000°C. High temperature, extreme cold and extrusion wear, the surface temperature of the roller changes from 240 to 480°C during one rotation, and the roller surface bears tension and compression stress alternately. Continuous casting rolls are rapidly cooled by high-pressure cooling water while in contact with high-temperature casting slabs, and are subjected to severe cold and heat fatigue caused by cold and hot cycles. While the continuous casting roll is subjected to the mechanical stress, it also bears the thermal stress of the high-temperature billet. In addition, the ...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/235
CPCB23K9/048B23K9/235
Inventor 徐伟国韩英华
Owner 上海一钢机电有限公司
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