Method for forging double-lug U-shaped forged piece for thermonuclear fusion reactor

Abstract

The invention discloses a method for forging a double-lug U-shaped forged piece for a thermonuclear fusion reactor. The method comprises the steps that firstly, a raw material ingot is heated to an initial forging temperature; secondly, a circular-ring-shaped blank is manufactured through the process of upsetting, punching, chambering and rounding, the circular-ring-shaped blank is forged into a rectangular-ring-shaped blank, the rectangular-ring-shaped blank is sawn off from the middle, and U-shaped blanks are obtained; thirdly, pressing is conducted through a hollow punch, so that the bottom of each U-shaped blank deforms to meet the size requirement; fourthly, the U-shaped blanks and the hollow punch are turned over together, each U-shaped blank is stretched, so that double-lug U-shaped blanks are obtained, and each double-lug U-shaped blank and the hollow punch are placed into a double-lug upsetting forming die together for overall upsetting; finally, the double-lug U-shaped forged piece is obtained. According to the method for forging the double-lug U-shaped forged piece for the thermonuclear fusion reactor, the metal fiber flow of the forged piece is distributed according to the shape of the product through integrated forging forming of complicated-structure parts, the structure is even, grain refinement is achieved, the shape is regular, and the special use demand of the thermonuclear fusion reactor can be met.

Description

technical field [0001] The invention belongs to the technical field of forging, in particular to a method for forging a double-ear U-shaped forging for a thermonuclear fusion reactor. Background technique [0002] The International Thermonuclear Experimental Reactor (ITER) program is an international thermonuclear experimental reactor built by the European Union, China, the United States, Russia, Japan, South Korea and India in 2005. The purpose is to develop controllable nuclear fusion technology , and ultimately provide mankind with unlimited, clean, and safe new energy. This plan is currently one of the largest and most far-reaching international scientific research cooperation projects in the world. A binaural U-shaped part in the thermonuclear fusion experimental reactor ( See figure 1 ), the part needs to be forged from 316LN austenitic stainless steel material. Since 316LN material belongs to austenitic structure and has no allotropic transformation, the grain size c...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the existing problems in the prior art. The design provides a method for forging double-eared U-shaped forgings for thermonuclear fusion reactors, which can effectively solve the problems of welding deformation and grain coarsening at the welding position of the parts. , the metal fiber streamline of the forged piece forged by this method is distributed according to the shape of the product, the structure is uniform, the grain is refined, the shape is regular, the quality of the forging is high, the cutting amount of machining is small, and the production efficiency is high

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