Research Article
Specimen Test of Large-Heat-Input Fusion Welding Method for Use of SM570TMCP
Table 3
Large-heat-input welding test details and specimens (SM490TMCP).
| Steel type | Plate thickness (mm) | Preheat tem. (°C) | Interlayer tem. (°C) | Welding method | Input heat (kJ/cm) | Voltage (V) | Current (A) | Speed (Cm/min) | Welding materials |
| SM490TMCP | 35 | None | None | ESW | 61 | 40 ± 5 | 380 ± 10 | 15 | KD-50 | None | None | 56 | 45 ± 5 | 380 ± 10 | 18 | KD-50 | 40 | None | Max. 250°C | SAW | 50 | DC | DC | | Welding rod | Flux | 1st: 22~30 2nd: 26~34 3rd: 28~36 | 1st: 510~540 2nd: 580~640 3rd: 560~620 | 1st: 22~30 2nd: 34~42 3rd: 36~40 | Korea KD60 | EF260 | None | Max. 250°C | 70 | Same for SAW | None | Max. 250°C | FCAW | 50 | 1st: 20~26 2nd: 26~34 3rd: 22~30 | 1st: 138~155 2nd: 180~220 3rd: 160~200 | 1st: 6~12 2nd: 10~18 3rd: 12~20 | Hyundai Supercored 81-k2 | 80 | 50°C | Max. 250°C | SAW | 50 | Same for SAW | 50°C | Max. 250°C | 70 | Same for SAW | 50°C | Max. 250°C | FCAW | Dangjin (50) | Same for FCAW | Hyundai Supercored 81-k2 |
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