High-temperature alloy bar blank upsetting forming device and method based on high-temperature-resistant medium

Abstract

The invention relates to a high-temperature alloy bar blank upsetting forming device and method based on a high-temperature-resistant medium. A bar blank and the high-temperature-resistant medium are placed in an extrusion cylinder to be subjected to primary upsetting forming; and the high-temperature-resistant medium flows out from a discharge hole formed in the wall of the extrusion cylinder. According to the method, the steady-state upsetting deformation of the high-temperature alloy which is large in height-diameter ratio and difficult to deform is achieved, and meanwhile the cracking defect caused by rapid temperature reduction in the deformation process of the alloy bar blank is effectively avoided. Besides, according to the forming method, in the large-deformation upsetting deformation process, a die does not need to be replaced, one-time forging forming is adopted, and the heating times and forming procedures in the hard-to-deform high-temperature alloy upsetting process are reduced; and under the condition that a traditional isothermal forging technology is not adopted, the defect of instability or cracking of the bar billet with the large height-diameter ratio in the upsetting deformation process can be avoided, the cost is saved, and the production efficiency is improved. And a new selection way is provided for upsetting deformation of small-batch high-temperature alloy bar billets which are large in height-diameter ratio and difficult to deform.

Description

technical field [0001] The invention relates to the technical field of thermal processing and forging, and provides a high-temperature-resistant medium-based high-temperature alloy billet upsetting forming device and method thereof. Background technique [0002] The diameter of the new generation of aero-engine turbine disk forgings is generally above Φ400mm, and the disk forging requires fine-grained blanks above Φ200mm. However, the content of γ' phase in refractory superalloys is relatively high, which leads to more serious segregation of alloy ingots with the increase of diameter. At this stage, it is difficult to produce large-scale low-segregation ingots above Φ360mm, and it is difficult to obtain a large amount of deformation when medium-sized ingots are opened to prepare rods with specifications above Φ200mm, resulting in coarse grain structure of the rods. The upsetting deformation process is a process of uneven deformation, and the height-to-diameter ratio of the ...

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Problems solved by technology

[0004] The purpose of the present invention is to design and provide a method for upsetting high-temperature-diameter-ratio high-temperature alloy billets based on high-temperature-resistant medium shape control in view of the above-mentioned existing domestic technical conditions. In the roughing process, the reusable high-temperature-resistant medium is used, which not only acts as a radial constraint on the billet, but also plays the role of heat preservation for the jacket, so as to realize the stable upsetting deformation of the high-height-to-diameter ratio difficult-to-deform superalloy, and effectively Avoid cracking defects caused by the rapid drop in temperature during the deformation of the alloy billet

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