Technical Factors Affect The Quality of Welded Joints

The technical factors that affect the quality of welded joints include the following:

1.Material.

Includes base metal filler metal. Manual welding: electrode E4303, drying. Carbon dioxide welding, carbon dioxide gas purity ≥99.5%, material H08Mn2SiA.

2.Welding methods and processes.

The welding method is suitable for the properties of the joint material to be welded and the welding position of the joint.

The way to eliminate stress is shot blasting, grinding the steel ring as a whole to remove rust, dirt and reduce welding stress.

3.Stress.

The presence of stress in welded joints is one of the causes of various types of cracks. The way to eliminate stress is shot blasting, grinding the steel ring as a whole to remove rust, dirt and reduce welding stress.

4.Geometric shapes.

The geometry of the joint has a great influence on the stress distribution. Because the higher the stress concentration factor, the greater the impact on welding.

5. Environment.

When there is corrosion, high temperature, low temperature and changes in climatic conditions in the use environment, the influence of the material on the welding defects and the quality of the joint should be considered.

6 Post-weld treatment.

Post-weld treatment includes post-weld heat treatment and post-weld mechanical treatment. Post-weld heat treatment such as: rim, welding first and then heat treatment to reduce welding residual stress. Post-weld mechanical treatment. Such as: grinding welds.