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Welding Knowledge | Measures to Solve Burn-through and Deformation of Stainless Steel Plate during Welding
Release time:
2021-08-30
Author:
Source:
The main measures to solve the burning and deformation of stainless steel sheet welding are: 1. Strictly control the heat input on the welded joint, select the appropriate welding method and process parameters (mainly welding current, arc voltage, welding speed). 2. Generally, smaller nozzles are used for sheet welding, but we recommend using larger nozzle diameters as much as possible, so that the weld protection surface during welding is larger, which can effectively and isolate air for a long time, so that the weld can form better. Strong oxidation resistance. 3. With Φ 1.5 cerium tungsten rod, the sharpness of grinding should be sharper, and the length of tungsten rod extending out of the nozzle should be as long as possible, which will make the base material faster.
The main measures to solve the burning and deformation of stainless steel sheet welding are:
1, strictly control the heat input on the welding joint 'select the appropriate welding method and process parameters (mainly welding current, arc voltage, welding speed).
2. Generally, smaller nozzles are used for sheet welding, but we recommend using larger nozzle diameters as much as possible, so that the weld protection surface during welding is larger, which can effectively and isolate air for a long time, so that the weld can form better. Strong oxidation resistance.
3. With Φ 1.5 cerium tungsten rod, the sharpness of grinding should be sharper, and the length of tungsten rod extending out of the nozzle should be as long as possible, which will make the base material melt faster, that is to say, the melting temperature will rise faster and the temperature will be more concentrated, which will enable us to melt the position to be melted as fast as possible, and will not let more mother materials rise in temperature, thus reducing the area where the internal stress of the material changes, finally, the deformation of the material will also be reduced.
4. Choosing a reasonable welding sequence is particularly important for controlling welding residual deformation. For the structure of symmetrical welds, symmetrical welding should be used as much as possible; for asymmetrical structures, the first welding seam is used, and the second welding seam is used. One side. The deformation of the post-weld is sufficient to eliminate the deformation of the front side so that the overall deformation is reduced.
5. The assembly size shall be as accurate as possible, and the interface clearance shall be as small as possible. A slightly larger gap is easy to burn through or form a larger weld.
6. Hardcover fixture must be used to balance the clamping force evenly.The key to welding stainless steel sheet is to pay attention to: strictly control the line energy on the welded joint, and strive to minimize the heat input on the premise that the welding can be completed, so as to reduce the heat affected zone to avoid the above defects.
7, stainless steel sheet is the best laser welding 0.1MM can be welded "laser spot size arbitrary adjustment" can be very good control. The deformation ratio is also not available.
Reprinted from welding and cutting online, infringement must be deleted
Key words:
Welding, deformation, as far as possible, adopt, weld, melting, sheet, reduce, stainless steel
