Flux-Cored Welding Wire for Low-Alloy Steel Slag Removal
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Solution Overview
Problem
Conventional welding wires struggle with cleaning welding slags and galvanizing zinc layers on low-alloy high-strength steel electric tower components, leading to rough surfaces, increased costs, and reduced load capacity due to corrosion.
Innovation Solution
A flux-cored welding wire with a composition of Mn, Si, TiO2, SiO2, Mo, Mg, and Al, accommodated in a hollow section of a round-shaped shell, facilitates slag removal and forms a dense oxide layer for effective galvanization, using gas shielding arc welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional welding wire is used to weld low-alloy high-strength steel, then welding can be performed, but welding slags are firmly bonded and difficult to clean, resulting in rough surfaces
Solution Approach 1:
The patent changes the chemical composition parameters of the flux core by specifying precise ranges for Mn (5-20%), Si (1-15%), TiO2 (5-25%), SiO2 (0.1-10%), Mo (0.1-5%), and other elements. These parameter changes modify the flux properties to reduce slag adhesion and improve surface quality, directly resolving the contradiction between ease of cleaning and surface smoothness
Solution Approach 2:
The patent creates a composite welding wire structure with a steel shell and a multi-component flux core. The flux core combines multiple oxides and metallic elements in specific proportions to achieve both easy slag removal and smooth surface finish, resolving the contradiction through material composition optimization
2Reliability
If conventional welding wire is used, then welding can be performed, but galvanization quality is poor due to rough surfaces and slag residue
Solution Approach 1:
The flux core performs preliminary cleaning action during the welding process itself, removing slags and preparing a smooth surface before galvanization. This preliminary action eliminates the need for separate surface preparation steps and ensures high-quality galvanization coating adhesion
Solution Approach 2:
The welding wire's flux core automatically performs the surface preparation function that would otherwise require separate manual or mechanical processes. The flux self-cleans the welding bead during solidification, making the surface ready for galvanization without additional intervention
3Strength
If low-alloy high-strength steel is used to increase load capacity, then electric towers can sustain higher loads, but the steel requires specialized welding that is difficult to galvanize
Solution Approach 1:
The patent adjusts the flux composition parameters specifically for low-alloy high-strength steel welding, with controlled ranges of deoxidizing elements (Si, Mn, Al) and oxide formers (TiO2, SiO2). These parameter changes enable the flux to handle the specific metallurgical characteristics of high-strength steel while producing galvanizable surfaces
4Length of moving object
If electric towers are made taller to increase transmitting distance, then transmitting distance increases, but the components require higher load capacity which increases manufacturing complexity
Solution Approach 1:
The patent changes the material strength parameters by using low-alloy high-strength steel with optimized flux welding, enabling components to sustain higher loads required for taller towers. The flux composition parameters are specifically adjusted to accommodate the metallurgical requirements of high-strength steel
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 solution results in smoother, easier-to-clean welding surfaces, improved galvanization quality, reduced environmental impact, and enhanced load capacity of electric towers by minimizing slag residue and ensuring consistent zinc coating thickness.
Implementation Method 1
the hollow section in the welding wire accommodating flux, the flux containing a composition including: Mn: 5%-20%; Si: 1%-15%; TiO2: 5%-25%; SiO2: 0.1%-10%; Mo: 0.1%-5% by weight
Implementation Method 2
facilitates slag removal and forms a dense oxide layer for effective galvanization
Implementation Method 3
using gas shielding arc welding
Data Source
AI summary
A welding wire is provided with a hollow section for accommodating flux. The flux has a composition including: Mn: 5-20%, Si: 1-15%, TiO2: 5-25%, SiO2: 0.1-10%, Mo: 0.1-5% by weight, the balance being iron. When welding low alloy high strength steel by using the welding wire, the slag on the welding bead can be easily cleaned and a smooth surface can be formed on the welding bead which makes it easier to galvanize a zinc layer over the surface of the welding bead. The welding wire provides better welding operation performance and generates less welding spatters.