Abstract
The dynamic thermal process during double-sided asymmetrical TIG backing welding of large thick plates (1000 mm×700 mm×50 mm) is numerically simulated using MSC. MARC. The effect of arc distance on the thermal cycle in weld zone during double-sided asymmetrical TIG backing welding is investigated. The results show that the workpiece experiences double-peak thermal cycle in double-sided asymmetrical TIG backing welding. On the one hand, the fore arc has the pre-heating effect on the rear pass, and the pre-heating temperature depends on the distance between the double arcs, the heat input of fore arc, and the initial temperature of workpiece. On the other hand, the rear arc has the post-heating effect on the fore pass. The mutual effects of two heat sources decrease with the increase of arc distance.
| Original language | English |
|---|---|
| Pages (from-to) | 44-48 |
| Number of pages | 5 |
| Journal | China Welding (English Edition) |
| Volume | 20 |
| Issue number | 1 |
| State | Published - Mar 2011 |
Keywords
- Double heat sources on double sides
- Double-sided asymmetrical TIG backing welding
- Numerical simulation
- Thermal process
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