Grain refining processing method of titanium alloy tube blank for spinning

A processing method, the technology of titanium alloy tubes, applied in the field of titanium alloy material processing, can solve the problems of low material utilization rate, high production cost, difficult processing, etc., and achieve the effect of simplifying the production process, shortening the processing process and improving production efficiency

Active Publication Date: 2021-01-29
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation method of titanium alloy pipes for spinning is mainly rod machining, that is, hollow tubes are cut out of titanium alloy finished rods. The material utilization rate of this method is low, especially when deep drilling and cutting are very difficult. Large, resulting in long processing cycle and high production cost
In addition, in the reported pipe rolling and extrusion processes, the blanks used are obtained after forging, punching, and machining of qualified titanium alloy rods, which have the disadvantages of large input blanks, complicated procedures, and long processing cycles. And other issues

Method used

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  • Grain refining processing method of titanium alloy tube blank for spinning
  • Grain refining processing method of titanium alloy tube blank for spinning
  • Grain refining processing method of titanium alloy tube blank for spinning

Examples

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Embodiment 1

[0048] In this embodiment, a TC4 titanium alloy ingot with a diameter of 180 mm and a length of 200 mm is used. The riser and bottom pad of the ingot are cut off by machining, and the scale and defects on the surface of the ingot are removed by peeling, and pouring is carried out at both ends of the ingot. horn. After testing, the phase transition point of the TC4 titanium alloy used in this embodiment is T β =995°C.

[0049] Adopt a kind of fine-grain processing method of the titanium alloy pipe material for spinning of the present invention, take TC4 titanium alloy ingot as raw material, the step of producing the TC4 titanium alloy fine-grain pipe material for spinning is as follows:

[0050] Step 1. Firstly, heat the TC4 titanium alloy ingot at 1170°C, heat it for 90 minutes, and then perform one upsetting and one pulling out forging. The total deformation of upsetting is completed by n=5 pressing deformations, and the deformation coefficients of each pressing are respecti...

Embodiment 2

[0056] In this embodiment, a TC4 titanium alloy coarse-grained bar with a diameter of 150 mm and a length of 160 mm is used to remove oxide scales and defects on the surface by machining, and chamfer at both ends. After testing, the phase transition point (T β ) for T β =995°C.

[0057] Adopt a kind of fine-grain processing method of titanium alloy pipe material for spinning of the present invention, the steps of producing qualified TC4 titanium alloy pipe material for spinning are as follows:

[0058] Step 1. First, heat the TC4 titanium alloy coarse-grained rod at 1175°C, hold it for 80 minutes, and perform one upsetting and one drawing forging. The total deformation of upsetting is completed by n=6 times of pressing deformation, and the deformation coefficient of each pressing is respectively for alpha 1 =0.05, α 2 =0.05, α 3 =0.06, α 4 =0.06, α 5 =0.07, α 6 = 0.07, the total deformation of upsetting Q = 31%, the length after elongation is the same as the initial le...

Embodiment 3

[0064] In this embodiment, a TC4 titanium alloy ingot with a diameter of 230mm and a length of 300mm is used, the riser and bottom pad of the ingot are removed by machining, the scale and defects on the surface of the ingot are removed by peeling, and the ingot is reversed at both ends of the ingot. horn. After testing, the phase transition point (T β ) for T β =995°C.

[0065] Adopt a kind of fine-grain processing method of titanium alloy pipe material for spinning of the present invention, the steps of producing qualified TC4 titanium alloy pipe material for spinning from TC4 titanium alloy ingot casting are as follows:

[0066] Step 1. First heat the TC4 titanium alloy ingot at 1180°C, heat it for 105 minutes, and then perform one upsetting and one drawing forging. The total deformation of upsetting is completed by n=7 pressing deformations, and the deformation coefficients of each pressing are α 1 =0.05, α 2 =0.05, α 3 =0.05, α 4 =0.06, α 5 =0.06, α 6 =0.06, α 7 =...

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Abstract

The invention belongs to the technical field of titanium alloy material processing, and relates to a grain refining processing method of a titanium alloy tube blank for spinning. The method comprisesthe following steps: 1. forging at 150-200 DEG C and 50-120 DEG C above a phase transformation point to obtain a bar blank; 2, upsetting and drawing out are conducted at the temperature 20-50 DEG C below the phase transformation point, and obtaining a ring blank after punching; 3, performing reducing forging at the temperature 15-50 DEG C above the phase transformation point, and obtaining a pipeblank; and 4, rolling at the temperature of 25-90 DEG C below the phase transformation point, and obtaining a titanium alloy fine grain pipe with the wall thickness of 10-25 mm for spinning. The method is short in technological process, stable and controllable, the prepared titanium alloy pipe is fine in grain and uniform in structure, and the related technical requirements of the spinning formingprocess are met.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy material processing, and relates to a fine-grain processing method for a titanium alloy tube blank for spinning. Background technique [0002] Titanium alloys have excellent properties such as high specific strength, low density, good corrosion resistance, non-magnetic properties, and good weldability, and have been widely used in aerospace, ships, weapons and other weaponry fields. Spinning forming technology has the advantages of simple process, less and no cutting process, high product precision and excellent performance. It is an advanced manufacturing technology for manufacturing titanium alloy thin-walled rotary parts. Spinning technology has been widely used at home and abroad to prepare titanium alloy thin-walled rotary parts, such as combustion chamber cylinders, pressure vessels and storage tanks, engine casings, vector nozzles, etc. performance design needs. [0003] When using...

Claims

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Application Information

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IPC IPC(8): B21C37/06C22F1/18
CPCB21C37/06C22F1/183
Inventor 祝力伟李静朱知寿王新南商国强李明兵
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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