In a significant advancement for the energy sector, researchers have unveiled a promising method to enhance the quality of weld joints in small diameter fittings, particularly those used in nuclear power plants. The study, led by Yu. V. Poletaev from the Don State Technical University, explores the potential of friction welding (FW) as a superior alternative to traditional manual arc welding (MAW).
Current practices in MAW often fall short of the stringent quality standards required for the robust and safe operation of nuclear facilities, particularly when it comes to thick-walled fittings up to 80 mm in diameter. “Our research demonstrates that friction welding can provide the optimal heat input necessary for creating high-quality welds that meet regulatory requirements,” Poletaev stated.
The research focused on fittings made from low-alloy steel 10GN2MFA, employing a specialized friction welding machine known as MST–41. By meticulously analyzing the conical contact surfaces of the fittings, the team identified an ideal angle range of 30º–40º for the conical surfaces, which significantly improves the welding process. This innovative approach allows for a more controlled heat application, resulting in welds that not only meet but exceed the necessary standards.
The study also produced a detailed cyclogram of the friction welding process, illustrating the gradual formation of the weld joint through the sequential engagement of the conical surfaces. This methodical approach to welding not only enhances the mechanical properties of the joints but also paves the way for broader applications in the energy sector. “The implications of this research extend beyond just fittings; it could redefine welding processes for pipes and other components made from carbon and low-alloy steels,” Poletaev added.
The findings, published in the journal ‘Advanced Engineering Research’, highlight a pivotal shift in welding technology that could lead to safer and more reliable infrastructure in nuclear power plants. As the energy sector continues to evolve, the adoption of friction welding could mitigate risks associated with weld quality, ultimately fostering a more resilient energy framework.
This research not only addresses immediate quality concerns but also opens up new avenues for technological innovation in welding practices. As the industry moves towards more stringent safety regulations and efficiency standards, the integration of advanced welding techniques like friction welding could be a game-changer for manufacturers and operators alike.
