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

A new process, continuous casting roll technology, applied in the field of high-efficiency surfacing composite manufacturing of continuous casting rolls and single-layer surfacing composite manufacturing of continuous casting rolls, can solve the problems of long surfacing welding time, many surfacing welding defects, and low cost performance. Achieve the effect of reducing surfacing time, good process performance and reducing internal stress

Inactive Publication Date: 2019-03-26
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 (single-layer open-arc swing surfacing composite manufacturing of new rolls)

[0025] Taking surfacing composite manufacturing of Φ150mm continuous casting roll, the base material is 21CrMoV511 as an example, the drawing stipulates that the thickness of one side is 4mm, and the alloy composition (including carbon) meets voestalpine (TSC 4-TS No.03 / 94).

[0026] The surfacing composite manufacturing process is:

[0027] 1.1 Process the new roll blank to Φ144mm (that is, the design size of the base metal drawing + 1mm (one side)), and do the corresponding inspection;

[0028] 1.2 Select the appropriate self-shielding open arc surfacing welding consumables, especially the composition at Φ150mm and 142mm can meet the technical and mechanical performance requirements of voestalpine composition, structure and so on.

[0029] 1.3 Before welding, the roll blank is not preheated.

[0030] 1.4 Parameter requirements of surfacing welding specification (reference): ...

Embodiment 2

[0052] Embodiment 2 (single-layer open-arc swing surfacing composite manufacturing of new rolls)

[0053]Take surfacing composite manufacturing Φ150mm continuous casting roll, the base material is 42CrMo as an example, the drawing stipulates that the single side thickness is 4mm, and the alloy composition (except carbon) meets voestalpine (TSC 4-TS No.03 / 94).

[0054] The surfacing composite manufacturing process is:

[0055] 2.1 Process the new roll blank to Φ144mm (that is, the design size of the base metal drawing + 1.0mm (single side)), and perform corresponding inspections;

[0056] 2.2 Select the appropriate self-shielding open arc surfacing welding consumables, especially the composition at Φ150mm and 142mm can meet the technical and mechanical performance requirements of voestalpine composition, structure and so on.

[0057] 2.3 Before welding, the roll blank is not preheated.

[0058] 2.4 Parameter requirements of surfacing welding specification (reference):

[005...

Embodiment 3

[0081] Embodiment 3 (submerged arc single-layer submerged arc oscillating surfacing welding composite remanufacturing roll)

[0082] Taking 21CrMoV511 as an example for surfacing composite remanufacturing Φ180mm continuous casting base metal, the drawing stipulates that the thickness of one side is 5mm, and the alloy composition meets VAI (TSC 4-TS No.02 / 93).

[0083] The surfacing composite remanufacturing process is:

[0084] 3.1 The old roll blank is processed to Φ173mm (that is, the design size of the base metal drawing + 1.5mm (one side)), and the corresponding inspection is carried out. If there are local defects such as cracks, continue turning. For local defects, the mechanical properties similar to the base metal should be used. Repair welding with low alloy welding consumables;

[0085] 3.2 Select suitable submerged arc surfacing welding consumables, especially Φ180mm and Φ170mm to meet the requirements of VAI such as composition and hardness.

[0086] 3.3 Before w...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/04B23K9/32
CPCB23K9/04B23K9/32
Inventor 王清宝张赫
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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