Dual-Twin SAW Cladding for Single-Layer Low-Iron Deposits
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Solution Overview
Problem
Existing wire cladding processes, particularly submerged arc welding (SAW), struggle to produce a cladding deposit with a single layer while limiting the iron content to 5% or less, often requiring multiple passes and resulting in suboptimal deposition rates.
Innovation Solution
A dual-twin SAW system utilizing two twin SAW heads in close proximity with electroslag flux for resistive heating, allowing four consumable wires to melt simultaneously, minimizing penetration and dilution, and achieving a single-layer cladding deposit with less than 5% iron content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional SAW wire cladding processes are used, then cladding deposit can be applied, but multiple layers are required to complete the cladding operation, limiting deposition rates to about 18 kg/hour
Solution Approach 1:
The invention divides the cladding operation into two separate twin-wire SAW heads operating simultaneously in a dual-twin configuration. Each head deposits material onto different portions of the workpiece, allowing the process to achieve both high deposition rates and single-layer precision by segmenting the overall cladding task into coordinated sub-tasks.
2Quantity of substance
If conventional SAW processes deposit sufficient cladding material, then the necessary amount of cladding is achieved, but the iron content of the cladding deposit exceeds 5%
Solution Approach 1:
The invention applies different wire compositions and deposition parameters to different zones of the workpiece surface. By controlling the local deposition conditions at each twin-wire head, the process maintains iron content below 5% in the cladding deposit while still achieving the necessary total cladding quantity through the combined output of both heads.
3Productivity
If twin-wire SAW heads are used, then deposition rate increases, but iron content control below 5% cannot be maintained in a single pass
Solution Approach 1:
The invention merges two twin-wire SAW heads into a dual-twin configuration where both heads operate simultaneously and coordinate their deposition. This combination allows the system to achieve the high deposition rates necessary for single-pass completion while maintaining composition control through the distributed deposition strategy of multiple heads.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves high deposition rates of approximately 25-36 kg/hour with a single pass, producing a cladded deposit with desired thickness and composition, outperforming conventional methods by reducing iron content and minimizing dilution.
Implementation Method 1
introducing the at least two first consumable wires and the at least two second consumable wires into a molten slag pool formed on the surface of the workpiece to melt the at least two first consumable wires and the at least two second consumable wires via resistive heating
Implementation Method 2
the electroslag flux facilitates electrical couplings between at least the at least two first consumable wires and the workpiece to form the molten slag pool
Data Source
AI summary
A system and method for dual-twin SAW cladding is disclosed. The method includes arranging a first twin SAW head in close proximity to a second twin SAW head, delivering electroslag flux to a surface of a workpiece to create a layer of electroslag flux atop the workpiece, directing two first consumable wires through the first twin SAW head towards the surface of the workpiece, directing two second consumable wires through the second twin SAW head towards the surface of the workpiece, introducing the two first consumable wires and the two second consumable wires into a molten slag pool formed on the surface of the workpiece to melt the two first consumable wires and the two second consumable wires via resistive heating, and translating the first twin SAW head and the second twin SAW head together to form a cladded deposit on the workpiece.