A method for controlling the deformation of titanium alloy welded components in vacuum heat treatment with a large window
A vacuum heat treatment and welding component technology, which is applied in the field of vacuum heat treatment deformation control of thin-walled titanium alloy parts and titanium alloy welded components, can solve the problems of ineffective control of component deformation, long thermal correction operation cycle, and high cost. Simple structure, solution to cracks and deflection, easy to operate
Active Publication Date: 2018-07-13
BEIJING HANGXING MACHINERY MFG CO LTD
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Problems solved by technology
This type of component is prone to complex deformation during heat treatment. In current production practice, the traditional heat treatment process parameter optimization alone cannot effectively control the deformation of different parts of the component, so it cannot meet the requirements of subsequent machining.
Due to the limitations of the structure and shape of the titanium alloy welded component with a large window, the thermal correction operation cycle of the integral mold is long and inconvenient, and the cost is expensive
Method used
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specific Embodiment approach
[0030] The specific embodiment is carried out according to the following process steps: the first step four points and straightness measurement records: measure the horizontal and vertical outer diameter dimensions (φ360 size parts) of the member cylinder, (that is, the horizontal direction determined by the four-dot dash line and the The outer diameter dimension in the vertical direction of 90°), to measure the overall straightness of the component cylinder. Step 2: Install protective support plates at both ends of the component. The structure of the support plate is as follows figure 2 . The support plate is connected and supported by the column, and the boss is installed on the column, which can support the support plate and reduce the pressure of the support plate on the component, such as image 3 . There is a certain gap between the outer diameter of the support plate and the inner diameter of the component (1.5mm in the radial direction) to ensure a good size fit und...
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The invention discloses a vacuum heat treatment deformation control method of a titanium alloy welding member with a large window. The method comprises the following steps: 1, respectively arranging protection supporting discs at two end portions of the member, and connecting and supporting through a column and a pull rod; 2, prescribing the placement mode of the member in a furnace according to the structural characteristics of the member, and downward vertically placing the long length end of a closed cylinder; 3, introducing the member into the furnace at room temperature, pre-evacuating, heating to a predetermined temperature, carrying out heat insulation, and carrying out furnace cooling; and 4, vertically dismounting the supporting discs when the supporting discs are cooled and have a certain gap to the cylinder of the member. Compared with deformation control methods of special dies, the method adopting the supporting discs at two ends and adopting pull rod connection shape maintenance in the middle has the advantages of simple structure, easy operation, control of the ovality and flexure deformation of the member, and avoiding of repeated heating calibration.
Description
technical field [0001] The invention belongs to a titanium alloy vacuum heat treatment method, in particular to a vacuum heat treatment deformation control method for titanium alloy welded components with large windows, which is suitable for thin-walled titanium alloy parts with large windows. Background technique [0002] Titanium alloy components are increasingly used in aerospace products. On the one hand, large windows must be opened to facilitate the installation of a large number of equipment inside; The cylinder is combined and welded. The components include multiple longitudinal and circumferential welds and the welding residual stress is large. Stress relief annealing is required to prevent deformation and cracking. This type of component is prone to complex deformation during heat treatment. In current production practice, only traditional heat treatment process parameter optimization cannot effectively control the deformation of different parts of the component, s...
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IPC IPC(8): C22F1/18
CPCC22F1/02C22F1/183
Inventor 吴凯尤逢海姚为张铁军俞川尹峰贺晓军
Owner BEIJING HANGXING MACHINERY MFG CO LTD