How to ensure the welding quality after adjusting the hot wire TIG welding process?

2024-11-27 11:10:21

TIG (Tungsten Inert Gas) hot wire welding is a high-precision and high-quality welding process commonly used for repairing or processing thin-walled, high-strength, and high-precision components. Reasonable adjustment of process parameters plays a crucial role in the quality of TIG hot wire welding. The following will introduce how to adjust the TIG hot wire welding process parameters and how to ensure welding quality.

1. Selection of current and voltage:

In TIG hot wire welding, current and voltage are one of the most critical parameters. Generally speaking, lower current can reduce heat input, decrease deformation and residual stress; Higher current can improve the penetration and welding speed of the weld seam. According to the requirements of welding and the characteristics of the workpiece, the appropriate current and voltage are usually determined after experimental verification.

2. Control of speed and angle:

Welding speed and welding angle are also important factors affecting welding quality. Too fast speed can easily cause slag inclusion and porosity between welds, while too slow speed can easily lead to overheating zones and welding deformation. Meanwhile, for the welding process, the selection of welding angle is also crucial. It is usually recommended to choose a smaller welding angle to achieve better welding quality.

3. Control of protective gases and heat sources:

In TIG hot wire welding, shielding gas is one of the key factors to ensure welding quality. The selection and flow rate of shielding gas should be determined according to the welding material and overlay requirements. Generally, commonly used shielding gases include argon and argon hydrogen mixed gas. At the same time, maintaining the stability of the heat source is also very important, and the welding quality can be ensured by adjusting the angle between the welding gun and the workpiece appropriately.

4. Automatic control and detection device:

In order to improve the stability and accuracy of TIG hot wire welding, automatic control systems and detection devices can be used. By monitoring welding parameters and weld quality in real-time, adjusting process parameters in a timely manner, and ensuring that welding quality meets requirements. Meanwhile, the use of automatic control systems can reduce the influence of human factors and improve the consistency and stability of welding.

In general, to ensure the welding quality of TIG hot wire welding, the key is to adjust the process parameters reasonably, pay attention to the control of protective gas and heat source, control the welding speed and angle, and use automatic control and detection devices to improve the stability and accuracy of welding. By strictly following the process requirements and continuously optimizing the process parameters, the welding quality of TIG hot wire surfacing can be ensured to reach a higher level.