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Method for judging metallurgical quality of titanium alloy blade

A titanium alloy and blade technology, applied in the field of metallurgical quality judgment of titanium alloy blades, can solve the problems of engine reliability blind spots, streamlines and microstructures, mechanical properties and usable performance, etc., to achieve perfect technical standards and save costs , the effect of improving production efficiency

Active Publication Date: 2012-01-25
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is little information on the streamline of titanium alloy blades, and the relationship between streamline and microstructure, mechanical properties, and service performance is not clear. It is a blind spot for the reliability of the engine, and it is very necessary to make an early analysis and judgment.

Method used

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  • Method for judging metallurgical quality of titanium alloy blade
  • Method for judging metallurgical quality of titanium alloy blade
  • Method for judging metallurgical quality of titanium alloy blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment provides a method for judging the metallurgical quality of titanium alloy blades, characterized in that: the method for judging the metallurgical quality of titanium alloy blades includes, during the blade forming process, including: rod extrusion, upsetting, pre-forging, Isothermal forming, isothermal correction, heat treatment, mechanical processing, low power corrosion; vacuum heat treatment: double annealing, heating at 920℃, heat preservation, heat preservation time calculated according to the maximum cross section; cooling with argon gas; heating at 550℃, heat preservation for 2h, argon filling Air cooling; machining method: CNC machining; low-power corrosion bath: HF (42%) 120ML / L, HNO 3 (65%~68%)260ML / L, H 3 PO 4 (85%) 160ML / L, urea 25g / L, others are water;

[0022] If the uniform equiaxed α-phase organization is the ideal organization, then the heterogeneous microstructures corresponding to the low-magnification morphologies of different color contr...

Embodiment 2

[0033] This embodiment provides a method for judging the metallurgical quality of titanium alloy blades, characterized in that: the method for judging the metallurgical quality of titanium alloy blades includes, during the blade forming process, including: rod extrusion, upsetting, pre-forging, Isothermal forming, isothermal correction, heat treatment, mechanical processing, low-power corrosion; vacuum heat treatment: double annealing, heating at 930℃, heat preservation, heat preservation time calculated according to the maximum cross section; cooling with argon gas; heating at 650℃, heat preservation for 4h, argon filling Air cooling; machining method: CNC machining; low-power corrosion bath: HF (42%) 120ML / L, HNO 3 (65%~68%)260ML / L, H 3 PO 4 (85%) 160ML / L, urea 25g / L, others are water;

[0034] If the uniform equiaxed α-phase organization is the ideal organization, then the heterogeneous microstructures corresponding to the low-magnification morphologies of different color contr...

Embodiment 3

[0045] This embodiment provides a method for judging the metallurgical quality of titanium alloy blades, characterized in that: the method for judging the metallurgical quality of titanium alloy blades includes, during the blade forming process, including: rod extrusion, upsetting, pre-forging, Isothermal forming, isothermal correction, heat treatment, mechanical processing, low power corrosion; vacuum heat treatment: double annealing, heating at 925℃, heat preservation, heat preservation time calculated according to the maximum cross section; cooling with argon gas; heating at 600℃, heat preservation for 3h, argon filling Air cooling; machining method: CNC machining; low-power corrosion bath: HF (42%) 120ML / L, HNO 3 (65%~68%)260ML / L, H 3 PO 4 (85%) 160ML / L, urea 25g / L, others are water;

[0046] If the uniform equiaxed α-phase organization is the ideal organization, then the heterogeneous microstructures corresponding to the low-magnification morphologies of different color contr...

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Abstract

The invention relates to a method for judging the metallurgical quality of a titanium alloy blade. The blade formation process comprises: squeezing, upsetting, pre-forging, constant-temperature formation, constant-temperature correction, thermal treatment, mechanical processing and macro etch; vacuum thermal treatment: double annealing; and the macro etch bath solution is: (42 percent ) 120Ml / L HF, (65 to 68 percent) 260ML / L of HNO3, (85 percent) 160ML / L of H3PO4, 25 g / L of urea, and the rest is water; uniform equiaxial alpha-phase structure is adopted as an ideal state structure, so heterogeneous micro-structure corresponding to hypoploidy appearance with different color contrasts is harmful to the integral performance of the blade, and the metallurgical quality of the blade is judged according to the structural type, the existence position and the size of the area. The method has the advantages that a standard picture is established to be used as a judge reference for the macro etchexamination, so the dissection expense of the blade can be saved, the judging period of the blade can be shortened, the technical standard of the forge piece can be completed, and the production efficiency can be improved.

Description

Technical field [0001] The invention relates to the field of determining the metallurgical quality of titanium alloy blades, and particularly provides a method for determining the metallurgical quality of titanium alloy blades. Background technique [0002] Streamline is the regular pattern shown by the collection of directional deformation traces of metal material in the forging process of forging at low power. At present, there are few data on the streamlines of titanium alloy blades, and the relationship between streamlines and microstructure, mechanical properties, and performance is not clear. It is a blind zone for the reliability of the engine, and it is very necessary to make an analysis and judgment early. Summary of the invention [0003] The purpose of the present invention is to understand the properties of titanium alloy forgings early, and provides a method for judging the metallurgical quality of titanium alloy blades. [0004] The present invention provides a method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/95C22F1/18
Inventor 关红邰清安李阁平史凤岭郑渠英史丽坤杨义王丹
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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