Diffusion bonding preparation method of titanium alloy hollow structure

Abstract

The invention relates to a diffusion bonding preparation method of a titanium alloy hollow structure, which comprises the following steps: machining of titanium alloy prefabricated blanks: machining two titanium alloy prefabricated blanks which are oppositely combined into a hollow structure; coating for the first time: coating the two oppositely combined titanium alloy prefabricated blanks with ablock type high-temperature alloy coating mold; coating for the second time: coating the block type high-temperature alloy coating mold with a low-carbon steel jacket, and then sequentially carryingout edge sealing welding, baking and vacuum packaging on the low-carbon steel jacket; diffusion bonding: placing the low-carbon steel jacket into a gas diffusion furnace, and conducting diffusion bonding on the two titanium alloy prefabricated blanks; and finished product machining: taking out the titanium alloy prefabricated blanks obtained after diffusion bonding, and machining a finished workpiece of a hollow structure.

Description

technical field [0001] The invention relates to the technical field of titanium alloy manufacturing, in particular to a method for preparing a titanium alloy hollow structure by diffusion connection. Background technique [0002] Titanium alloy hollow sandwich structure can be prepared by dividing two parts into two halves, and then diffusion connection. This method has the characteristics of simple process path, low equipment requirements, and wide range of applicable materials. It is widely used in aerospace There are many fields of application. [0003] The existing diffusion bonding method to prepare titanium alloy and titanium-aluminum alloy hollow sandwich structures has the following shortcomings: [0004] 1. The mold has high requirements. Under the action of high temperature and high pressure for a long time, the mold will be deformed, and it needs to be replaced or reprocessed after a certain number of uses; [0005] 2. The requirements for hydraulic press equipm...

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Problems solved by technology

[0004] 1. The mold has high requirements. Under the action of high temperature and high pressure for a long time, the mold will be deformed, and it needs to be replaced or reprocessed after a certain number of uses;

[0005] 2. The requirements for hydraulic press equipment are high. As the size and air pressure continue to increase, the table top of the press increases, and the required tonnage also increases significantly;

[0006] 3. Insufficient manufacturing efficiency leads to high manufacturing cost;

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