Hot isostatic pressing shape control method for titanium alloy thin-wall part

Abstract

The invention discloses a hot isostatic pressing shape control method for a titanium alloy thin-wall part in the technical field of aerospace manufacturing. A cover plate with a vacuum hole, a top plate with a powder filling opening, a cylindrical wall, a rigid base plate for fixing a die, a bottom plate and titanium alloy powder. The method comprises the steps of die design and preparation, jacket preparation, hot isostatic pressing pretreatment, hot isostatic pressing process control, post treatment and the like, and provides a die shape and size design method aiming at the deformation problem of the titanium alloy thin-wall part in the whole forming process. According to the hot isostatic pressing shape control method constrained by the die and a jacket, the forming efficiency of the part and the utilization rate of raw materials can be improved, the compactness of the formed titanium alloy thin-wall part is high, the structure is uniform, the performance is excellent, an inner cavity of the formed titanium alloy thin-wall part can be near to the final shape, and the outer wall has enough machining allowance to meet the final size requirement.

Description

technical field [0001] The invention relates to the technical field of aerospace manufacturing, in particular to a hot isostatic pressure shape control method for titanium alloy thin-walled parts. Background technique [0002] Titanium alloy thin-walled parts have the characteristics of light weight, high strength and high temperature corrosion resistance, and have been widely used in the aerospace field. These titanium alloy thin-walled parts usually require high dimensional accuracy and surface quality. However, traditional titanium alloy thin-walled parts forming processes such as casting, forging, welding and machining have disadvantages such as unstable processing quality, long production cycle, and high manufacturing cost. Moreover, due to the poor rigidity of titanium alloy thin-walled parts, the processing process is extremely easy Problems such as deformation, instability and vibration occur. [0003] Hot isostatic pressing technology is an advanced manufacturing ...

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Problems solved by technology

[0004] The object of the present invention is to provide a method for controlling the shape of titanium alloy thin-walled parts by hot isostatic pressing to solve the problems raised in the above-mentioned background technology: first, to overcome the deformation of thin-walled parts caused by high temperature and high pressure in the hot isostatic pressing process; Secondly, reduce the machining allowance of titanium alloy thin-walled parts; finally, optimize the material selection and shape design of the jacket and built-in mold during the hot isostatic pressing process

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