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Electro-slag welding (ESW) has been widely used to join the box column because of high productivity. The heat input of ESW is far larger than those of other fusion welding processes, so ESW usually results in a long holding time over certain elevated temperature (∆tH time), a long cooling time from 800 to 500 °C (∆t8/5 time), and a wide heat-affected zone (HAZ). It can be foreseen that the mechanical...
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