Forging molding method for million kilowatt nuclear power main pipe
A technology of forging and main pipes, which is applied in the field of forging technology, can solve the problems that the main pipes of million-kilowatt nuclear power technology cannot be manufactured, and achieve the effect of small weight, low cost and weight reduction
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[0040] Such as Figure 16 Shown, the forging molding method of the million-kilowatt class nuclear power main pipeline of the present invention adopts the following method to forge the steel ingot that the material is 316LN high-grade stainless steel:
[0041] 1. Upsetting; heating the steel ingot to 1200°C and upsetting on the hydraulic press to make it become figure 1 The shape shown; if the temperature of the forging drops below 900°C during the upsetting process, reheat the forging to keep the temperature of the forging within the range of 900-1200°C;
[0042] 2. Elongation: heat the forging to 1200°C, elongate it on a hydraulic press, and use the wide anvil strong pressure method to elongate the cross-section of the forging into a regular octagon, making it a figure 2 The shape shown; if the temperature of the forging drops below 900°C during the elongation process, reheat the forging so that the temperature of the forging is always kept within the range of 900-1200°C; ...
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