Rework Welding Process of T-joint Full Penetration Weld Seam in Central Steel Structure of Marine Engineering Crane
A technology of marine engineering and welding technology, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., to avoid hydrogen-induced cracks, improve crack resistance, and avoid major hazards
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[0015] The invention relates to a repair welding process for full-penetration welds of T-shaped joints of a central steel structure of a marine engineering crane. The bottom plate and side plates of the T-shaped joints of the central steel structure are made of high-strength marine steel plates E36.
[0016] The specific steps are:
[0017] Step S1: Firstly, preheat the horizontal weld at the T-shaped joint between the bottom plate 1 and the side plate 2. The preheating adopts electric heating and attaches an electric heating block from the back of the bottom plate;
[0018] Step S2: After the preheating temperature reaches 110°C, check the defective welds at the T-joints shown by the flaw detection (see figure 2 Central cloud line area 5) Grind and remove the inner and outer sides of the T-joint by carbon arc gouging; cut a length of weld at the butt joint of side plate 2 on the extension path of the problem weld, see figure 2 Middle rectangular dotted line area 6; make th...
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