Terminology Related to Welding of Steel Structures

 

Welding of steel structures

1. hydrogen relief treatment

For the structural steel with large tendency of cold cracking, heat the welded joints to 200℃～250℃ after welding and keep them warm for a period of time to accelerate the diffusion and escape of hydrogen from the welded joints to prevent cold cracking caused by the accumulation of welding hydrogen.

Temperature for a period of time to accelerate the diffusion of hydrogen in the welded joints to prevent the accumulation of hydrogen in the welded joints and lead to cold cracking of the post-weld heat treatment method.

2.Stress relief treatment

After welding, the welded joints are heated to a certain temperature below the Ac1 line of the base material and kept warm for a period of time to reduce the

Welding residual stress, reduce the tendency of cold cracking of welded joints for the purpose of post-welding heat treatment method.

3.Weld access hole

In the main weld and secondary weld cross position, in order to ensure the continuity of the main weld, to prevent the emergence of three-way stress, and have a

In order to ensure the continuity of the main weld to prevent three-way stress, and conducive to the welding operation, in the corresponding position of the secondary components of the weld through the hole opened.

4.effective thickness

The minimum distance from the surface of the weld to the root of the weld, minus the residual height of the weld in the butt weld.

5.Effective throat

In fillet welds, the minimum distance from the surface of the weld to the root of the weld, excluding the raised or recessed portion of the weld.


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