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Titanium alloy oxygen permeation surface strengthening treatment method

A technology of surface strengthening and treatment method, applied in metal material coating process, air transportation, coating and other directions, can solve the problems of inconvenient operation, difficult sealing, re-opening after treatment, etc. The effect of microhardness

Inactive Publication Date: 2013-06-19
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method requires the use of a sealing device, the sealing device needs to be made of superalloy, and the sealing is welded by laser welding or other welding means, so there are problems of sealing difficulty and re-opening after processing, and the operation is inconvenient

Method used

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  • Titanium alloy oxygen permeation surface strengthening treatment method
  • Titanium alloy oxygen permeation surface strengthening treatment method
  • Titanium alloy oxygen permeation surface strengthening treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A titanium alloy oxygen penetration surface strengthening treatment method, the material used is TA2 titanium alloy, the specific steps are as follows: the titanium alloy material is placed in the medium ZrO which has been pickled and purified. 2 Medium, medium ZrO 2 The particle size is 200 mesh to 360 mesh. Heating in an ordinary air furnace at 800°C and holding for 8 hours (480 minutes), then turn off the power of the furnace, let the sample and the jar cool down with the furnace; remove the sample to see that there is a thin oxide film on the surface, Discoloration and blackening; the microhardness of the oxygen-infiltrated strengthened layer can reach HV780, and the depth of the infiltrated layer can reach 100 μm; the surface is smooth.

[0041] Such as figure 1 , 2 , 5, and 8 show the cross-section, element distribution diagram, hardness distribution diagram and XRD phase analysis results of the oxygen permeation layer after oxygen permeation strengthening treat...

Embodiment 2

[0043] A titanium alloy oxygen permeation surface strengthening treatment method, the difference from Example 1 is: the titanium alloy material is placed in the medium ZrO which has been pickled and purified. 2 Medium, medium ZrO 2 The particle size is 200 mesh to 360 mesh, heated in an ordinary air furnace at 850°C, and kept for 3 hours (180min), then turn off the power of the furnace, let the sample and the jar cool down with the furnace; a very small amount of oxide film is formed on the surface; The microhardness can reach HV750, and the penetration depth can reach 100 μm; the surface is smooth.

[0044] Such as image 3 , 4 , 6, and 9 show the cross-section, element distribution diagram, hardness distribution diagram and XRD phase analysis results of the oxygen permeation layer after oxygen permeation strengthening treatment. As a comparison, Figure 7 It is the XRD analysis curve of the surface layer of TA without treatment, and it can be seen that the distribution o...

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Abstract

The invention discloses a titanium alloy oxygen permeation surface strengthening treatment method, which comprises the following steps of: putting a titanium alloy material into a treated medium, heating the titanium alloy material to the temperature of between 700 and 850 DEG C in atmosphere in a common air furnace, and preserving the heat for 30 to 6,000 minutes; and forming an oxygen solid solution hardening layer on the surface of a titanium alloy test piece by using the method, wherein the depth of the oxygen solid solution hardening layer is 80 to 120 microns, and the medium is ZrO2 powder. The surface treatment method is simple, surface strengthening of the titanium alloy can be realized by only one step, the hardness of the titanium alloy surface layer can reach over HV780, the solid solution hardening depth of oxygen can reach 100 microns, and good effects are achieved.

Description

technical field [0001] The invention relates to a metal surface treatment method, in particular to a titanium alloy oxygen permeation surface strengthening treatment method. Background technique [0002] Titanium alloys are widely used in defense industries such as aviation and aerospace, as well as civil industries, due to a series of excellent properties such as small specific gravity, high specific strength, excellent corrosion resistance, and excellent biocompatibility. However, due to its low hardness, one of the biggest obstacles in the application process is the problem of surface wear resistance. The easy wear and tear of parts leads to a great increase in the use cost of the product. In addition, because the titanium alloy is not wear-resistant, its wear will increase during use, which will seriously affect the safety and reliability of the entire aircraft or locomotive. [0003] Oxygenation treatment is a method to improve the surface hardness of titanium alloys....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/10
CPCY02T50/60
Inventor 陈长军张敏
Owner SUZHOU UNIV