The eight most easily overlooked problems in welding construction
Release time:
2023-08-01
In the welding process, there are many things that need to be paid attention to. Once neglected, it may make a big mistake. Details determine success or failure, please read it patiently.
In the welding process, there are many things that need to be paid attention to. Once neglected, it may make a big mistake. Details determine success or failure, please read it patiently.
1, welding construction does not pay attention to the selection of the best voltage
[phenomenon] during welding, regardless of the size of the groove, the same arc voltage is selected. In this way, the required penetration depth and width may not be met, and defects such as undercut, pores and splash may occur.
[Measures] Generally, the corresponding long arc or short arc should be selected separately for different situations to obtain better welding quality and work efficiency.
For example, short arc operation should be adopted in order to obtain better penetration during backing welding, and arc voltage can be appropriately increased in order to obtain higher efficiency and melting width during filling welding or cover welding.
In the welding process, there are many things that need to be paid attention to. Once neglected, it may make a big mistake. Details determine success or failure, please read it patiently.
3. Welding does not control the welding current
[Phenomenon] During welding, in order to catch up with the progress, the butt weld of medium and heavy plate shall not be beveled. The strength index decreases, even fails to meet the standard requirements, and cracks appear during bending test, which will make the performance of weld joints can not be guaranteed and pose potential hazards to structural safety.
[Measures] Welding shall be controlled according to the welding current in the process qualification, allowing 10 ~ 15% floating, and the blunt edge size of the groove shall not exceed 6mm. When butt joint, when the plate thickness exceeds 6mm, the groove shall be opened for welding.
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