Blue anodic oxidation process for titanium alloy

A technology of anodic oxidation and titanium alloy, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of difficult operation, existence of α-hardened layer, local overheating, etc., and achieve the effect of quick identification

Inactive Publication Date: 2009-04-22
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for workers to operate, and it is difficult to distinguish surface defects of parts, and it is not easy to operate
In addition, for the defects caused during the processing of parts, such as: grinding overheating, local overheating, local α-hardened layer, etc., it is impossible to use the current defect detection method

Method used

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  • Blue anodic oxidation process for titanium alloy
  • Blue anodic oxidation process for titanium alloy
  • Blue anodic oxidation process for titanium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A titanium alloy blue anodic oxidation process, characterized in that: the titanium alloy blue anodic oxidation process, the titanium alloy blue anodic oxidation process is: degreasing→cold water washing→removal of hardened layer→cold water washing→activation→ Cold water washing→titanium alloy anodization→cold water washing→deionized water washing→reverse transparent display→deionized water washing→hot water washing→drying→inspection.

[0048] In the titanium alloy blue anodizing process, the hot water washing condition is: 70-100° C., and the time is ≥ 2 minutes.

[0049] In the described titanium alloy blue anodizing process, the formula of the titanium alloy blue anodizing bath solution is:

[0050] Sodium phosphate 42~59g / L

[0051] water balance

[0052] PH value 8~9

[0053] Voltage 30±1V

[0054] Working time 30±1S

[0055] Working temperature 15~35℃

[0056] The apparent current is less than 1A.

[0057] In the described titanium alloy blue anodizing proc...

Embodiment 2

[0078] A titanium alloy blue anodic oxidation process, characterized in that: the titanium alloy blue anodic oxidation process, the titanium alloy blue anodic oxidation process is: degreasing→cold water washing→removal of hardened layer→cold water washing→activation→ Cold water washing→titanium alloy anodization→cold water washing→deionized water washing→reverse transparent display→deionized water washing→hot water washing→drying→inspection.

[0079] In the titanium alloy blue anodizing process, the hot water washing condition is: 70-100° C., and the time is ≥ 2 minutes.

[0080] In the described titanium alloy blue anodizing process, the formula of the titanium alloy blue anodizing bath solution is:

[0081] Sodium phosphate 42~59g / L

[0082] water balance

[0083] PH value 8~9

[0084] Voltage 30±1V

[0085] Working time 30±1S

[0086] Working temperature 15~35℃

[0087] The apparent current is less than 1A.

[0088] In the described titanium alloy blue anodizing proc...

Embodiment 3

[0109] A titanium alloy blue anodic oxidation process, characterized in that: the titanium alloy blue anodic oxidation process, the titanium alloy blue anodic oxidation process is: degreasing→cold water washing→removal of hardened layer→cold water washing→activation→ Cold water washing→titanium alloy anodization→cold water washing→deionized water washing→reverse transparent display→deionized water washing→hot water washing→drying→inspection.

[0110] In the titanium alloy blue anodizing process, the hot water washing condition is: 70-100° C., and the time is ≥ 2 minutes.

[0111] In the described titanium alloy blue anodizing process, the formula of the titanium alloy blue anodizing bath solution is:

[0112] Sodium phosphate 42~59g / L

[0113] water balance

[0114] PH value 8~9

[0115] Voltage 30±1V

[0116] Working time 30±1S

[0117] Working temperature 15~35℃

[0118] The apparent current is less than 1A.

[0119] In the described titanium alloy blue anodizing proc...

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PUM

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Abstract

The invention relates to a process for oxidizing a titanium alloy blue anode, which comprises the following steps: deoiling, cold water washing, hardened layer removal, cold water washing, activation, cold water washing, titanium alloy anodization, cold water washing, deionized water washing, transflective displaying, deionized water washing, hot water washing, drying, and inspection. The process has the advantage of distinguishing the alloy defect and processing defect on the surface of a titanium alloy part fast and effectively. The main representation comprises that after finishing the processes of the anodization and the transflective displaying, the surface of the part has a steel gray background, and the parts where defects exist present different colors; compared with a defect picture, the defects of forging fold, inclusion, overheating, partial supercooling, partial alpha phenomenon, beta concentration area, grinding ablation and the like of the parts due to metallurgy or processing reasons can be judged more clearly and reliably. Through detection, the result shows that the process is stable and reliable and has the advantage that the process can not replaced by the prior process.

Description

technical field [0001] The invention relates to the field of titanium alloy defect inspection, and in particular provides a titanium alloy blue anodic oxidation process. Background technique [0002] During the processing of titanium alloys, structural defects such as non-metallic inclusions, metal inclusions, and chemical composition segregation will appear. Among them, non-metallic inclusions mainly refer to the occurrence of α-layer phenomena such as oxygen-rich, carbon-rich, nitrogen-rich, and boron-rich. The oxygen element in the oxygen-rich α layer will form a concentration gradient on the interface with the substrate. When the oxygen element is too high, it is equivalent to an increase in the Al content, and Ti3Al will be precipitated. The nitrogen-enriched inclusions belong to the hard α-layer inclusions, forming titanium nitride TiN. The essence of the carbon-enriched inclusion is titanium carbide TiC, which has corrosion resistance and is in the form of a block. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
Inventor 孙慧艳贾东晨高鸽
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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