Challenges of welding process qualification in the application of new materials
With the development of science and technology and the continuous emergence of new materials, welding process qualification is facing more and more challenges. The application of new materials puts forward higher requirements for the welding process, and how to deal with these challenges under the premise of ensuring the welding quality has become the focus of attention in the welding industry.
First, the challenge of new materials to the welding process.
1.High-strength and high-hardness materials.
As the strength and hardness of the new material increases, so does the heat input and welding stress during the welding process. This can lead to problems such as degraded performance of welded joints and cracking of welds. Therefore, for this type of material, the welding process qualification needs to fully consider the welding heat input, welding sequence and cooling rate and other factors to ensure the performance of the welded joint.
2.Dissimilar material welding.
When dissimilar materials are welded, differences in welding properties and weldability of different materials may lead to unstable weld quality. The qualification of welding process needs to reasonably select welding methods, welding materials and heat treatment processes according to the characteristics of dissimilar materials to ensure the quality of welds.
3.Composites and laminates.
The welding of composite materials and laminates is difficult, and due to the difference in the properties of the material layers, it is easy to have problems such as peeling and warping between layers. For this type of material, welding process qualification requires the study of appropriate welding methods and parameters to achieve high-quality welding.
2. Countermeasures for welding process qualification in the application of new materials.
1.Strengthen the research on welding process.
In view of the welding challenges of new materials, the welding process qualification needs to strengthen the research of welding process, and optimize the welding method, welding parameters and heat treatment process. Through continuous exploration and practice, a set of welding processes suitable for new materials have been summarized.
2.Improve the quality of welding materials.
The quality and performance of welding materials have an important impact on the quality of welded joints. Therefore, in the welding process of new materials, it is necessary to select high-quality and well-matched welding materials to improve the performance of welded joints.
3.Enhanced welding process control.
In the welding process, the welding current, voltage, speed and other parameters are strictly controlled to ensure the stable welding quality. At the same time, strengthen the monitoring and detection in the welding process, and find and solve welding quality problems in a timely manner.
4.Improve the welding process qualification system.
Establish a sound welding process qualification system, including welding process qualification standards, evaluation methods and evaluation procedures. This will help to better meet the challenges in the welding process of new materials and ensure the quality of welding.
Summary. With the continuous application of new materials, welding process qualification faces many challenges. By strengthening the research of welding technology, improving the quality of welding materials, strengthening the control of welding process and improving the welding process qualification system, we can deal with the problems in the welding process of new materials and ensure the welding quality. In the future, the welding industry should continue to pay attention to the development of new materials, continuously optimize the welding process qualification method, and provide strong support for the application of new materials.