Surface treatment method for improving welding properties of Al2O3 ceramic and Ti6Al4V alloy

A surface treatment and welding performance technology, which is applied in the field of surface treatment to improve the welding performance of Al2O3 ceramics and Ti6Al4V alloys, can solve the problems of welding difficulties between ceramics and Ti6Al4V alloys, and achieve the effects of improving fracture toughness, high efficiency, and increasing wettability

Active Publication Date: 2019-01-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: for Al 2 o 3 Ceramics and Ti6Al4V alloy welding difficult problem, the present invention uses double glow plasma surface metallurgy method and ion implantation method as means, provides a kind of improving 2 o 3 The surface treatment method of ceramic and Ti6Al4V alloy welding performance can realize Al 2 o 3 Vacuum diffusion welding of ceramics and Ti6Al4V alloys, greatly improving the vacuum diffusion welding of Al 2 o 3 Application of Ceramic / Ti6Al4V Alloy Welding Process

Method used

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  • Surface treatment method for improving welding properties of Al2O3 ceramic and Ti6Al4V alloy
  • Surface treatment method for improving welding properties of Al2O3 ceramic and Ti6Al4V alloy

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Experimental program
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Embodiment 1

[0046] Embodiment 1: prepare the material used for welding, process according to the following steps:

[0047] (1) Put the Ti6Al4V alloy and Ni-Ti alloy target into the double-glow plasma surface alloying device, use the Ti6Al4V alloy as the workpiece pole, and use the Ni-Ti alloy target (Ni accounts for 70wt%, Ti accounts for 30wt%) as the source pole;

[0048] (2) Vacuumize to the ultimate vacuum, send in argon, start the glow, first clean the target and Ti6Al4V alloy, and prepare the Ni-Ti alloy layer after cleaning. The steps are as follows:

[0049] (2a) Low-temperature bombardment of the target (plasma cleaning) for 30 minutes to remove scale and impurities on the surface of the target. The process parameters are as follows:

[0050] Target voltage: 650V;

[0051] Workpiece voltage: 0V;

[0052] Argon pressure: 20Pa;

[0053] Distance between target and workpiece: 20mm;

[0054] Cleaning time: 30min;

[0055] (2b) Adjust the voltage of the target to zero, and conti...

Embodiment 2

[0071] Embodiment 2: prepare the material used for welding, process according to the following steps:

[0072] (1) Put the Ti6Al4V alloy and Ni-Ti alloy target into the double-glow plasma surface alloying device, use the Ti6Al4V alloy as the workpiece pole, and use the Ni-Ti alloy target (Ni accounts for 70wt%, Ti accounts for 30wt%) as the source pole;

[0073] (2) Vacuumize to the ultimate vacuum, send in argon, start the glow, first clean the target and Ti6Al4V alloy, and prepare the Ni-Ti alloy layer after cleaning. The steps are as follows:

[0074] (2a) Low-temperature bombardment of the target (plasma cleaning) for 30 minutes to remove scale and impurities on the surface of the target. The process parameters are as follows:

[0075] Target voltage: 750V;

[0076] Workpiece voltage: 0V;

[0077] Argon pressure: 25Pa;

[0078] Distance between target and workpiece: 15mm;

[0079] Cleaning time: 30min;

[0080] (2b) Adjust the voltage of the target to zero, and conti...

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Abstract

The invention discloses a surface treatment method for improving the welding properties of Al2O3 ceramic and Ti6Al4V alloy. The method comprises the following steps: (1), preparing Ni-Ti alloy layer on the surface of the Ti6Al4V alloy from a Ni-Ti alloy target material by adopting a double glow plasma surface metallurgy method, wherein the Ni-Ti alloy layer comprises a Ni-Ti deposition layer and an inter-diffused layer; (2), injecting Ti ions on the surface of the Al2O3 ceramic through an ion injection method; and (3), welding the Ti6Al4V alloy prepared in the first step and the Al2O3 ceramicsubjected to surface treatment in the second step in vacuum diffusion welding equipment. The method can directly realize vacuum diffusion welding between the Al2O3 ceramic and the Ti6Al4V alloy through the treatment of the double glow plasma surface metallurgy method and the ion injection method, is high in efficiency, and can greatly improve the application of vacuum diffusion welding to the welding technology of the Al2O3 ceramic and the Ti6Al4V alloy.

Description

technical field [0001] The present invention relates to a kind of welding technology of ceramic material, especially to a kind of improving Al 2 o 3 Surface treatment method for welding properties of ceramics and Ti6Al4V alloy. Background technique [0002] Ti6Al4V alloy is widely used as an important structural material in aviation, aerospace, energy, chemical and national defense equipment industries due to its high specific strength, excellent corrosion resistance and heat resistance. However, due to the high friction coefficient of Ti6Al4V alloy, poor room temperature and high temperature wear resistance, low high temperature oxidation resistance and other shortcomings, it limits its application as an important industrial structural material. It is difficult to further improve the performance of Ti6Al4V alloy by improving the melting technology and chemical composition. Al 2 o 3 Ceramic is the ceramic material with the largest production volume and the most widely u...

Claims

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Application Information

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IPC IPC(8): C23C14/48C23C14/46C23C14/16C23C14/18B23K20/14B23K20/22
CPCB23K20/14B23K20/22C23C14/165C23C14/18C23C14/46C23C14/48
Inventor 张平则魏东博李逢昆姚正军李淑琴田恬
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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