Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for effectively improving stress corrosion resistance of titanium alloy

A technology of stress corrosion resistance and titanium alloy, which is applied in the direction of surface reaction electrolytic coating, metal material coating process, vacuum evaporation plating, etc., can solve the lack of stress corrosion resistance of α-Ti alloy, weaken other properties, and cannot improve α-Ti alloy stress corrosion resistance and other issues to achieve the effect of reducing failure damage, ensuring excellent performance and high specific strength

Active Publication Date: 2020-03-17
CHONGQING UNIV OF ARTS & SCI
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, various technologies for processing titanium alloys are becoming mature, but they are still lacking in improving the stress corrosion resistance of α-Ti alloys; not only cannot improve the stress corrosion resistance of α-Ti alloys, but also weaken other Performance, can not meet the relevant application requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for effectively improving stress corrosion resistance of titanium alloy
  • Method for effectively improving stress corrosion resistance of titanium alloy
  • Method for effectively improving stress corrosion resistance of titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for effectively improving the stress corrosion resistance of titanium alloys, suitable for α-Ti alloys (titanium alloys containing aluminum, tin and (or) lead, mainly TA4(Ti 3 Al), TA5(Ti 4 al 0.005 B), TA6(Ti 5 Al) and TA7(Ti 5 al 2.5 Sn)), it is characterized in that: it first anodizes the α-Ti alloy sample, and then sputters Pd, Mo and Ti on the sample by magnetron sputtering, and its mass percentage is 0.8:0.3: 95, forming a composite layer of Mo-Pd-Ti containing Pd ions and Mo ions; the specific steps are as follows:

[0033] a. Select and pretreat the sample: select the α-Ti alloy to be processed and make a block sample; then grind and polish; then use degreasing liquid to degrease, the degreasing liquid is NaOH, NaOH 3 PO 4 、Na 2 CO 3 The mixed solution with a volume ratio of 3.5:4:2.5; finally wash with deionized water to avoid bringing in some ions that will affect the performance of the anodized film.

[0034] b. Transfer the pretreated α-Ti ...

Embodiment 2

[0040] A method for effectively improving the stress corrosion resistance of titanium alloys, suitable for α-Ti alloys (titanium alloys containing aluminum, tin and (or) lead, mainly TA4(Ti 3 Al), TA5(Ti 4 al 0.005 B), TA6(Ti 5 Al) and TA7(Ti 5 al 2.5 Sn)), it is characterized in that: it first carries out anodic oxidation treatment to the α-Ti alloy sample, and then sputters Pd, Mo and Ti on the sample by magnetron sputtering, and its mass percentage is 1:0.5: 100, forming a composite layer of Mo-Pd-Ti containing Pd ions and Mo ions; the specific steps are as follows:

[0041] a. Select and pretreat the sample: select the α-Ti alloy to be processed and make a block sample; then grind and polish; then use degreasing liquid to degrease, the degreasing liquid is NaOH, NaOH 3 PO 4 、Na 2 CO 3 The mixed solution with a volume ratio of 4:4.5:3; finally wash with deionized water to avoid bringing in some ions that will affect the performance of the anodized film.

[0042] b....

Embodiment 3

[0048] A method for effectively improving the stress corrosion resistance of titanium alloys, suitable for α-Ti alloys (titanium alloys containing aluminum, tin and (or) lead, mainly TA4(Ti 3 Al), TA5(Ti 4 al 0.005 B), TA6(Ti 5 Al) and TA7(Ti 5 al 2.5 Sn)), which is characterized in that: it first anodizes the α-Ti alloy sample, and then sputters Pd, Mo and Ti on the sample by magnetron sputtering, and its mass percentage is 1.2: 0.7: 105, forming a composite layer of Mo-Pd-Ti containing Pd ions and Mo ions; the specific steps are as follows:

[0049] a. Select and pretreat the sample: select the α-Ti alloy to be processed and make a block sample; then grind and polish; then use degreasing liquid to degrease, the degreasing liquid is NaOH, NaOH 3 PO 4 、Na 2 CO 3 mixed solution, the volume ratio of which is 4.5:5:3.5; finally wash with deionized water to avoid bringing in some ions that will affect the performance of the anodized film.

[0050] b. Transfer the pretreat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
compressive stressaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for effectively improving the stress corrosion resistance of titanium alloy. The method is suitable for alpha-Ti alloy (the titanium alloy containing aluminum, tin and / or lead and mainly comprising TA4 (Ti3Al), TA5 (Ti4Al0.005 B), TA6 (Ti5Al) and TA7 (Ti5Al2.5Sn)). The method comprises the following steps: firstly, anodic oxidation treatment is carried out on an alpha-Ti alloy sample; hole sealing treatment is not performed after the anodic oxidation treatment; and then Pd, Mo and Ti are sputtered on the sample through magnetron sputtering to form a Mo-Pd-Ti composite layer containing Pd ions and Mo ions. According to the invention, on the premise that other excellent properties of the titanium alloy are not affected, the stress corrosion resistance of the alpha-Ti alloy is improved, failure damage of the alpha-Ti alloy is reduced, and the service life of the alpha-Ti alloy is prolonged.

Description

technical field [0001] The invention relates to the technical field of titanium alloy surface treatment, in particular to a method for effectively improving the stress corrosion resistance of titanium alloys. Background technique [0002] Titanium and titanium alloys have low density, high specific strength, excellent corrosion resistance, non-magnetism and good low temperature impact resistance. Therefore, titanium and titanium alloys are widely used in various fields. At present, stress corrosion (SCC) accidents caused by residual stress generated by titanium alloys during cold working, forging, welding, heat treatment or assembly account for 40% of the total accidents; in addition, the external stress generated during work or due to the volume of corrosion products The uneven stress caused by the effect is the source of stress for SCC; the higher the stress level, the shorter the time for SCC to appear. As an important class of titanium alloys, α-Ti alloys also play an i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C23C14/35C23C14/16
CPCC23C14/165C23C14/352C25D11/26
Inventor 徐照英胡卿卿邓川宁
Owner CHONGQING UNIV OF ARTS & SCI