Why is it said that high-quality welded joints can be obtained through process approaches?

High-quality weld joints can be achieved through a process approach. The key lies in scientifically controlling key parameters during the welding process to reduce defects and optimize performance.

Key Points in Process Control
Material and Parameter Matching
Select appropriate welding materials (such as electrodes and wires) based on the properties of the base material. Match parameters such as welding current, voltage, and welding speed to ensure a balance between heat input and material melting requirements.

Preheating and Post-Welding Treatment
Preheating (e.g., heating the weldment to a certain temperature) reduces thermal stresses. Combined with interpass insulation or post-weld heat treatment (e.g., tempering), this reduces the risk of defects such as cracks and porosity.

Thermal Cycle Adjustment
Optimize the welding sequence and cooling rate to avoid localized overheating or insufficient cooling, ensure uniform joint microstructure, and enhance mechanical properties.

Operational Specifications
Strictly adhere to groove design and welder operating standards, such as controlling electrode pressure and maintaining weldment cleanliness, to avoid problems such as burn-through and lack of fusion caused by improper parameters.