How to improve the welding quality of submerged arc welding. The influence of key parameters is very different!
In modern manufacturing industry, submerged arc welded steel pipes are widely used in building engineering, bridge construction, fluid transportation and sludge transportation. Therefore, there is also a high requirement for welding quality. However, the shape and performance of weld are often affected by many factors, and these factors need to be accurately controlled to ensure the welding quality to meet the standard. This paper will discuss in detail the main factors affecting the shape and properties of submerged arc welding seam.
Importance of welding parameters
Welding parameters are the key factors in the welding process, which directly determine the quality and efficiency of welding. The following are the main welding parameters and their effects:
1.Welding current: welding current determines the heat input during welding. Excessive current may lead to overheating of weld, burning through, splashing and deformation. However, if the current is too small, it may lead to incomplete fusion or insufficient penetration.
2.Welding voltage: welding voltage is related to arc length and weld pool shape. Too high voltage may make the arc too long and reduce the welding efficiency; If the voltage is too low, the arc will be unstable and the weld quality will be affected.
3.Welding speed: the welding speed determines the length of the weld in unit time. Too fast may lead to too fast cooling of the weld, resulting in defects such as incomplete fusion and cold cracks; If the speed is too slow, it may increase the heat input and lead to overheating of the weld.
The quality of medium plate plays a decisive role in the performance of weld. Therefore, when selecting plates, plates with higher purity should be selected. The purity of welding material has a significant influence on the quality of weld. Impurities and inclusions may cause porosity, cracks and other defects in the weld.
Technical requirements of welding equipment
Advanced welding equipment is an important guarantee to ensure the quality of submerged arc welding seam. The following are some technical requirements for welding equipment:
1.Stability: Welding equipment should have good stability to ensure stable welding parameters and performance during long-term continuous work.
2.Accuracy: The equipment should be able to accurately control welding parameters, such as current, voltage and speed, to meet the welding requirements.
3.Maintenance and maintenance: Regular maintenance and maintenance of welding equipment is the key to ensure its long-term stable operation. Improper equipment maintenance may lead to performance degradation and frequent failures.
To ensure the welding quality up to standard, it is necessary to accurately control welding parameters, select high-quality plates and use advanced welding equipment. In the future, with the continuous progress and innovation of technology, submerged arc welding technology will play a more important role in modern manufacturing industry. Huayang steel pipe will also continue to innovate technology and improve the quality of steel pipe.Welcome to Hebei Huayang Steel Pipe Co., Ltd.We are waiting for you here.
