Unfused is mainly two types: the root is not fused and the interlayer is not fused. The root unmelted is mainly the weld metal and the base metal and the welded joint are not melted during the priming process. The inter-layer unmelted is mainly the unmelted weld metal between the layers during the multilayer and multi-pass welding process.
The main cause of non-fusion is the low welding line energy, fast welding speed or improper operation methods.
3. Prevention measures
⑴ Properly increase the welding current and increase the energy of the welding line
⑵ Welding speed is appropriate, not too fast.
(3) Skilled operation skills and correct electrode (gun) angle.
4. Governance measures
⑴Strengthen the practice, improve the operation technology, and the welder has a strong sense of responsibility
制定 For different base materials, welding materials, formulate and implement corresponding measures to deal with unfused defects at different positions.