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Tagalog The influence of porosity on the performance of welded joints is multifaceted. The following are the main effects of porosity on the performance of welded joints:
1. * * Reduce strength and plasticity * *: Pores weaken the effective working surface of the weld metal, resulting in a decrease in the effective load-bearing cross-sectional area of the weld. This directly affects the mechanical properties of the joint, reducing the strength and plasticity of the weld.
2. * * Causing stress concentration * *: The presence of pores can cause stress concentration around them, making the joint more prone to fracture under load. This stress concentration phenomenon will seriously affect the fatigue strength and service life of the joint.
3. * * Impact on joint sealing * *: Pores can damage the density of the weld, leading to leakage problems in welded joints. This is a serious quality hazard for welded structures that require sealing.
4. * * Reduce joint corrosion resistance * *: The presence of pores will accelerate the diffusion and penetration of corrosive media in the weld, thereby reducing the corrosion resistance of the joint. This may lead to premature failure of the joint in harsh environments.
5. * * Impact on joint appearance quality * *: The pits formed by pores on the surface of the weld can reduce the appearance quality of the welded joint and affect the overall aesthetics. Meanwhile, this may also leave a negative impression on users and affect the reliability of the welding structure.
In summary, the influence of porosity on the performance of welded joints cannot be ignored. Therefore, strict control of welding parameters, selection of appropriate welding methods and materials, maintenance of cleanliness in the welding area, and use of protective gases should be taken during the welding process to prevent the formation of gas pores, in order to improve the quality and reliability of welding joints.
