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Abstract

An electron beam welding system having improved deep penetration weld characteristics in which the electron beam is repeatedly deflected from an undeflected nominal position, as the beam traverses along a weld zone, to build up a heat distribution pattern in the vicinity of the weld zone. The heat distribution pattern is made up of a number of substantially distinct zones of different heat density with a preferred pattern comprising three zones with a space between the first and second zones. The third zone leads the second zone and the space trails the second zone in the direction of traversal of the beam with the maximum heat density occurring in the second zone.

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First Claim