Isothermal forward and backward composite extrusion and vacuum diffusion welding composite producing method of cladding first wall

Abstract

The invention discloses an isothermal forward and backward composite extrusion and vacuum diffusion welding composite producing method of a cladding first wall. The method is characterized by comprising the following steps: firstly, bending a plate blank with a rectangular initial cross section to form a pre-formed U-shaped piece; secondly, performing forward and backward composite extrusion on the pre-formed U-shaped piece by an isothermal precision plastic forming process to form a U-shaped piece with a double-way opened H-shaped section to serve as a first component; thirdly, performing one-way extrusion on the pre-formed U-shaped piece by an isothermal precision plastic forming process to form a U-shaped piece with a one-way opened U-shaped section to serve as a second component; finally performing butt welding on the first components by vacuum diffusion welding in the opening-to-opening form, and performing encapsulation welding on the second component and the first components positioned at the two ends in the opening-to-opening form to form the cladding first wall. The cladding first wall formed by the method provided by the invention has the advantages of high shape and dimension precision, uniform wall thickness, no distortion of runner section, high runner and welding line structure property, high material utilization ratio and production efficiency, and stable process.

Description

[0001] This application is a divisional application of the invention patent application with the application date of 20150213, the application number of 2015100808041, the invention name is the cladding first wall isothermal positive and negative composite extrusion and vacuum diffusion welding composite manufacturing process, and the applicant is Hefei University of Technology. technical field [0002] The invention relates to a compound manufacturing process of isothermal positive and negative compound extrusion and vacuum diffusion welding of the first wall of a cladding layer, belonging to the technical field of material processing. Background technique [0003] Fusion reactor cladding is the core of future fusion reactor components, and is a key component for deposition and conversion of neutron energy, as well as tritium breeding and shielding. The first wall is an important part of the cladding module. As a part of the cladding structure that directly faces the high-te...

AI Technical Summary

Problems solved by technology

However, the current manufacturing process has defects such as low material utilization rate and production efficiency, poor flow path structure performance, low dimensional accuracy, and unstable process.

Although the hot isostatic pressing diffusion bonding process has been applied in the assembly of the first wall of the test cladding module, the process must be in a sealed environment, and the requirements for the weldment are very high, and the secondary welding of the weld will occur during the welding process. Sub-free deformation, unable to control its forming accuracy

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