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Integral forming method of large size thin-walled titanium alloy cylindrical part without welding line

A kind of overall forming, titanium alloy technology, applied in the direction of furnace type, furnace, heat treatment furnace, etc.

Active Publication Date: 2009-11-18
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there are no literature reports on the preparation of titanium alloy sheets into large-scale thin-walled seamless cylindrical parts (pipes) at home and abroad.

Method used

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  • Integral forming method of large size thin-walled titanium alloy cylindrical part without welding line

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Adopt the method of the present invention to make the overall forming method of the large-scale thin-walled titanium alloy cylindrical part with 600 mm in diameter, 400 mm in length and 2 mm in wall thickness, such as figure 1 As shown, the specific steps are as follows:

[0026] (1) Plate blanking: adopt the existing technology to calculate the required diameter of the titanium alloy plate according to the size of the prepared pipe, and then process the titanium alloy plate into a circular plate blank;

[0027] (2) Stamping to prepare tube blanks: Coat the round plate blank with a glass powder coating of 0.05 mm to prevent titanium alloy oxidation and hydrogen absorption, then put the circular plate blank into a heating furnace and heat it to 800 ° C, take it out and immediately punch and stretch it , Stop stamping when the blank temperature is lower than 700°C, and then repeat the above heating stamping process 3 times until a cylindrical tube blank is prepared.

[0...

Embodiment 2

[0041] Adopt the method of the present invention to make the overall forming method of the large-scale thin-walled titanium alloy cylindrical part with a diameter of 400mm, a length of 200mm, and a wall thickness of 1mm, and the specific steps are as follows:

[0042] (1) Plate blanking: adopt the existing technology to calculate the required diameter of the titanium alloy plate according to the size of the prepared pipe, and then process the titanium alloy plate into a circular plate blank;

[0043] (2) Stamping to prepare the tube blank: Coat the disc blank with a glass powder coating of 0.1mm to prevent titanium alloy oxidation and hydrogen absorption, then put the disc blank into a heating furnace and heat it to 700°C, take it out and immediately punch and stretch it , Stop stamping when the blank temperature is lower than 600°C, repeat the above-mentioned heating stamping process twice until a cylindrical tube blank is prepared.

[0044] (3) High-temperature vacuum heat t...

Embodiment 3

[0052] Adopt the method of the present invention to make the overall forming method of the large-scale thin-walled titanium alloy cylindrical part with 800mm in diameter, 500mm in length, and 7mm in wall thickness, and the specific steps are as follows:

[0053] (1) Plate blanking: adopt the existing technology to calculate the required diameter of the titanium alloy plate according to the size of the prepared pipe, and then process the titanium alloy plate into a circular plate blank;

[0054] (2) Stamping to prepare tube blanks: Coat 0.08 mm of glass powder coating to prevent titanium alloy oxidation and hydrogen absorption on the circular plate blanks, then put the circular plate blanks into a heating furnace and heat them to 900 ° C, take them out and stamp them immediately , Stop stamping when the blank temperature is lower than 700°C, and repeat the above-mentioned heating stamping process 7 times until a cylindrical tube blank is prepared.

[0055] (3) High-temperature ...

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Abstract

The invention provides an integral forming method of a large size thin-walled titanium alloy cylindrical part without a welding line. The integral forming method comprises the following steps of: (1) tube blank preparation by stamping; (2) high-temperature vacuum heat treatment; (3) heating power spinning thinning; (4) unheating power spinning diameter expanding; (5) repetitive and alternate conduction of steps (3) and (4) for 2-3 times; (6) high-temperature vacuum heat treatment; (7) finish turning treatment; and (8) stabilizing treatment. The integral forming method prepares the large size thin-walled titanium alloy cylindrical part without the welding line (wall thickness is 1-7mm) which has high precision and high performance by utilizing titanium alloy plates and adopting a composite technique combining a stamping method, a spinning method and a stabilizing treatment method, and solves the problems of low material utilization ratio, having longitudinal welding lines, low precision of tube performance and the like in the forging and roll bending welding forming of the large size titanium alloy thin-walled tubes.

Description

technical field [0001] The invention relates to a method for manufacturing a titanium alloy cylindrical part, in particular to a method for integrally forming a large-scale thin-walled titanium alloy cylindrical part without welds. Background technique [0002] Titanium alloy cylindrical parts are widely used in military and civilian products. However, it is very difficult to process and form titanium alloy cylindrical parts, especially large-size and thin-walled products. [0003] The document "Research on the Application of Titanium Alloy Forming Technology in Aeronautical Missiles" reported that the two hemispherical parts of the TC4 titanium alloy spherical gas cylinder of the Atlas Intercontinental Missile are formed by sheet metal and hot spinning, and the heating temperature is 535 ° C ~ 595°C. The titanium alloy nozzle parts are formed by one-pass spinning by flat blank and powerful spinning method, and the hot spinning temperature is 750℃~850℃. There is also a 7....

Claims

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Application Information

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IPC IPC(8): B23P15/00B21D22/02B21D22/14C22F1/18C22F1/02C21D9/08C21D1/26
Inventor 吕宏军王琪李启军阴中炜
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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