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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  • Abstract
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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 inc

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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Example Embodiment

[0045] See Figure 1 ~ Figure 4 , The open-arc welding and surfacing repair method of continuous casting segment continuous casting roll of the present invention includes the following steps:

[0046] 1. Welding material selection

[0047] Choose suitable welding materials, among which, the transition layer is 430-O, Welding wire; 414N-O is selected for the working layer, Welding wire.

[0048] 2. Open arc welding surfacing process

[0049] 2.1 Inspect the continuous casting roll before welding to check whether the roll surface is oily, rusty, or cracked.

[0050] 2.2 Making the arc pilot ring

[0051] The material of the pilot arc ring is low-carbon φ10mm round steel. The outer circle of the pilot arc ring 30 is reduced by 11mm from the nominal size of the continuous casting roll 10, and the pilot arc ring is welded to the end face of the continuous casting roll. The height difference between the outer circle of the pilot arc ring and the roll surface is not greater than 0.5mm; weld...

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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 ...

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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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