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Updated: Jul 1, 2025
09:17
Surrogate Model Development for Digital Experiments in Welding
Published on: March 28, 2025
842
Study on pulse current auxiliary heating process of submerged arc welding
Da-Long Li1, Xiang-Yu Sun1, Ming-Ming Shen1
1School of Mechanical Engineering, Yanshan University, Qinhuangdao, 066004, China.
Heliyon
|March 4, 2024
Summary
Auxiliary pulse current enhances welding quality by refining grain size and improving mechanical properties. This technology optimizes heat distribution and influences nucleation during the melting process.
Area of Science:
- Materials Science
- Mechanical Engineering
- Welding Technology
Background:
- Weldment temperature field distribution is critical for welding quality.
- Improving mechanical properties of welding joints is a key objective.
- Existing methods may not fully optimize the thermal aspects of welding.
Purpose of the Study:
- To investigate the effect of auxiliary pulse current on weldment heating and mechanical properties.
- To simulate and analyze the temperature field and current density distribution during welding with auxiliary pulse current.
- To understand the influence of auxiliary pulse current parameters on welding outcomes.
Main Methods:
- Metallographic, strength, and hardness experiments were conducted.
- Finite Element Analysis (FEA) using ANSYS and ANSYS Parametric Design Language (APDL) for process simulation.
- Quantitative analysis of auxiliary pulse current parameters' influence on temperature and current density.
Main Results:
- Auxiliary pulse current refines grain size and enhances mechanical properties of the welding joint.
- Simulation provided temperature field, pulse current density distribution, and effective pulse current time.
- A new parameter, time-current density, was defined to characterize current density changes over time.
Conclusions:
- Auxiliary pulse current significantly improves welding joint quality.
- Enhanced welding quality is attributed to altered heat distribution and influenced nucleation processes.
- The study provides a quantitative understanding of auxiliary pulse current effects for optimized welding.
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