Solid-state connection method of surface self-nanocrystallization TC17 alloy and TC4 alloy

A TC17, self-nanotechnology technology, used in welding equipment, metal processing equipment, non-electric welding equipment and other directions, can solve the problems of long connection time, long manufacturing cycle, increased energy consumption during connection time and other problems, and achieves dense organization without defects, The effect of promoting metallurgical bonding

Active Publication Date: 2019-05-14
南京三航智能制造科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the above-mentioned heterogeneous titanium alloy solid state connection method, the connection time required to obtain a high-performance connection joint is long, which will lead to the coarsening of the titanium alloy matrix structure and affect the overall ...

Method used

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  • Solid-state connection method of surface self-nanocrystallization TC17 alloy and TC4 alloy
  • Solid-state connection method of surface self-nanocrystallization TC17 alloy and TC4 alloy
  • Solid-state connection method of surface self-nanocrystallization TC17 alloy and TC4 alloy

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Experimental program
Comparison scheme
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Embodiment 1

[0026] Embodiment 1: A kind of solid-state connection method of surface self-nanometerized TC17 alloy and TC4 alloy, comprising the following steps:

[0027] (1) TC17 alloy is put into the shot blasting chamber, and the spray gun is adjusted apart from TC17 alloy 250-350mm, adopting the cast steel projectile that diameter size is 0.5-0.7mm carries out shot blasting to the surface of TC17 alloy; The air pressure is 0.25-0.45MPa, and the shot peening time is 20-60min;

[0028] (2) Put the TC17 alloy after shot blasting into absolute ethanol solution and carry out ultrasonic cleaning for 15-25min, then dry it with a blower for subsequent use;

[0029] (3) Use 180#, 240#, 400#, 600#, 800#, 1000#, 1200#, 1500# SiC water sandpaper to grind the TC4 alloy step by step; then, grind the TC4 alloy Put it in absolute ethanol solution for ultrasonic cleaning for 15-25min, then dry it with a hair dryer for later use;

[0030] (4) The shot peening surface of the TC17 alloy is closely attac...

Embodiment 2

[0032] Embodiment 2: the same as Embodiment 1, the difference is: the specific steps of this embodiment include the following steps:

[0033] (1) Put the TC17 alloy into the shot blasting chamber, and adjust the distance of the spray gun to 300mm from the TC17 alloy, and use cast steel projectiles with a size of Ф0.6mm to perform shot peening on the surface of the TC17 alloy. The specific shot peening process parameters are: the air pressure is 0.45MPa, shot peening time is 60min;

[0034] (2) Process the shot-peened TC17 alloy into a connection specimen: in figure 1 A rectangular parallelepiped TC17 alloy is shown in , on which the connecting specimen is processed, specifically, a cylindrical TC17 alloy connecting specimen with a size of Ф10mm×7.5mm is processed along the centerline of the rectangular parallelepiped TC17 alloy; it is a circular specimen of Ф10mm The shot blasting surface of TC17 alloy is reserved on the surface of the connection test piece;

[0035] (3) Put...

Embodiment 3

[0041] Embodiment 3: the same as Embodiment 2, the difference is: in step (7), the temperature is raised to 820° C. at a rate of 2° C. s −1 .

[0042] According to the steps of the above-mentioned embodiments, the solid-state connection between the surface self-nanoized TC17 alloy and the TC4 alloy can be realized. Depend on Image 6 It can be seen that the connection joints are well bonded, and the joint tissue is dense without obvious defects. After testing, the room temperature shear strength of the connection joint is 789MPa, which is higher than the room temperature shear strength of the TC4 alloy base material (720MPa).

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Abstract

The invention relates to a solid-state connection method of a surface self-nanocrystallization TC17 alloy and TC4 alloy. The solid-state connection method comprises the steps that shot blasting treatment is performed on the surface of a TC17 alloy by placing the TC17 alloy into a shot blasting chamber, then the TC17 alloy is placed in an anhydrous ethanol solution for ultrasonic cleaning and driedwith a blower for standby application, and further, SiC waterproof abrasive paper is used for grinding a TC4 alloy; then the ground TC4 alloy is placed in the anhydrous ethanol solution for ultrasonic cleaning for 15-25 min, and dried by a blower for standby application; the blasting surface of the TC17 alloy and the ground surface of the TC4 alloy are closely attached together and placed in a thermal simulation test machine, vacuum extraction is performed, pressurization at a constant temperature is performed for 10-30 min, and then pressure relief and cooling are performed; and finally, theconnected alloy test piece is air-cooled to the room temperature. The solid-state connection method enables a base layer of the TC 17 alloy to provide more diffusion channels for atomic diffusion atthe solid-state connection interface, promotes metallurgical bonding of a heterogeneous titanium alloy joint, and then obtains a high-performance surface layer surface self-nanocrystallization TC17 alloy and TC4 alloy joint.

Description

technical field [0001] The invention relates to the field of solid-state connection of heterogeneous titanium alloys, in particular to a solid-state connection method for surface self-nanometerized TC17 alloy and TC4 alloy. Background technique [0002] Modern aviation and aerospace fields require high-end equipment to achieve high reliability, low energy consumption, and high functional efficiency. Using high-performance lightweight materials to manufacture complex structural parts can realize the lightweight of key components of equipment and meet the requirements of equipment weight reduction and equipment performance improvement. . Titanium alloy is a high-performance lightweight alloy with excellent comprehensive properties and widely used in the aviation field. The effective connection of heterogeneous titanium alloys can make full use of the characteristics of different titanium alloys to meet the service requirements of different regions of the components, and then o...

Claims

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Application Information

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IPC IPC(8): B23K20/02B23K20/14B23K20/24
Inventor 李淼泉孙利星李莲
Owner 南京三航智能制造科技有限公司
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