Spray deposition densifying device and application thereof

Abstract

The invention discloses a spray deposition densifying device and the application thereof. The device disclosed by the invention includes a rotating shaft, wherein a plurality of rotating balls are fixed on the rotating shaft; each rotating ball is fixed on the rotating shaft through a flexible chain; during the rotation of the rotating shaft, the rotating balls are distributed in a spiral line around the rotating shaft, the extending direction of the spiral line is the same as the axial direction of the rotating shaft, and the length of the flexible chain in the direction the same as the rotating direction of the rotating shaft periodically changes along the spiral line; within each period, the length of the flexible chain is gradually increased in the direction the same as the rotating direction of the rotating shaft; the screw pitch of the spiral line is 30-50 mm; and the central angle of ball centers of the two adjacent rotating balls is 10-15 degrees. During the spray deposition, the rotating balls in the densifying device are used for impacting the surface of a deposition blank, metallurgical bonding is generated under the shearing action, the deposition blank is densified layer by layer through the rotation of a pipe blank during the spray deposition, the entire densification is realized in an accumulated manner, so that the pipe stock with high performance is obtained.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and in particular relates to a spray deposition densification device, spray deposition equipment and a processing method for preparing an aluminum alloy tube by using the spray deposition equipment. Background technique [0002] Compared with other material forming and preparation methods such as traditional casting and powder metallurgy, spray deposition not only has the advantages of one-step forming of traditional casting, but also has the advantages of rapid solidification and high cooling rate. It is another method between manufacturing and powder metallurgy. A metal forming process. [0003] Although the spray deposition process has the advantages of economy and wide application range, the relative density of the spray-deposited billet is generally 85% to 90%, and there are a large number of micropores in the billet. This brings about two problems: first, the mechanical p...

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Problems solved by technology

[0003] Although the spray deposition process has the advantages of economy and wide application range, the relative density of the spray-deposited billet is generally 85% to 90%, and there are a large number of micropores in the billet. This brings about two problems: first, the mechanical properties of the material are reduced, especially the high-temperature mechanical properties are greatly reduced due to the existence of holes; second, there is almost no plasticity in the formability

However, due to the limitation of equipment tonnage, specificity and mold size, it is difficult to realize the forming process of large-size (diameter greater than or equal to 300mm) tube billet by hot extrusion due to high cost, while spinning forming has a great influence on the formability of tube billet material. have higher requirements

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