Method for macro-etching detection of titanium alloy blade metallurgical quality

A low-magnification corrosion and titanium alloy technology, which is applied in the direction of optical testing for defects/defects, can solve problems such as streamlines and microstructures, mechanical properties and performance, engine reliability blind spots, etc., to achieve perfect technical standards, shorten The effect of cycle time and cost savings

Active Publication Date: 2010-07-21
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 macro-etching detection of titanium alloy blade metallurgical quality
  • Method for macro-etching detection of titanium alloy blade metallurgical quality
  • Method for macro-etching detection of titanium alloy blade metallurgical quality

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Embodiment 1

[0022] This embodiment provides a method for inspecting the metallurgical quality of titanium alloy blades by low-magnification corrosion, which is characterized in that: the method for inspecting the metallurgical quality of titanium alloy blades by low-magnification corrosion includes, during the blade forming process, including: extruding rods, Heading, pre-forging, isothermal forming, isothermal correction, heat treatment, machining, low-magnification corrosion; vacuum heat treatment: double annealing, heating at 900°C, heat preservation, heat preservation time calculated according to the largest cross-section; cooling with argon; heating at 550°C , heat preservation for 4 hours, filled with argon to cool; machining method: CNC machining; low-magnification corrosion bath solution: HF (42%) 120ML / L, HNO 3 (65%~68%)260ML / L, H 3 PO 4 (85%) 160ML / L, urea 25g / L, others are water;

[0023] If the uniform equiaxed α-phase structure is the ideal structure, then the heterogeneous...

Embodiment 2

[0035] This embodiment provides a method for inspecting the metallurgical quality of titanium alloy blades by low-magnification corrosion, which is characterized in that: the method for inspecting the metallurgical quality of titanium alloy blades by low-magnification corrosion includes, during the blade forming process, including: extruding rods, Heading, pre-forging, isothermal forming, isothermal correction, heat treatment, machining, low-magnification corrosion; vacuum heat treatment: double annealing, heating at 920°C, heat preservation, heat preservation time calculated according to the largest cross-section; cooling with argon; heating at 650°C , heat preservation for 8h, filled with argon to cool; machining method: CNC machining; low-magnification corrosion bath solution: HF (42%) 120ML / L, HNO 3 (65%~68%)260ML / L, H 3 PO 4 (85%) 160ML / L, urea 25g / L, others are water;

[0036] If the uniform equiaxed α-phase structure is the ideal structure, then the heterogeneous micr...

Embodiment 3

[0048] This embodiment provides a method for inspecting the metallurgical quality of titanium alloy blades by low-magnification corrosion, which is characterized in that: the method for inspecting the metallurgical quality of titanium alloy blades by low-magnification corrosion includes, during the blade forming process, including: extruding rods, Heading, pre-forging, isothermal forming, isothermal correction, heat treatment, machining, low-magnification corrosion; vacuum heat treatment: double annealing, heating at 910°C, heat preservation, heat preservation time calculated according to the largest cross-section; cooling with argon; heating at 600°C , heat preservation for 6h, filled with argon to cool; machining method: CNC machining; low-magnification corrosion bath solution: HF (42%) 120ML / L, HNO 3 (65%~68%)260ML / L, H 3 PO 4 (85%) 160ML / L, urea 25g / L, others are water;

[0049] If the uniform equiaxed α-phase structure is the ideal structure, then the heterogeneous micr...

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Abstract

The invention relates to a method for macro-etching detection of titanium alloy blade metallurgical quality. The blade forming technological process includes rod extruding, heading, dummying, isothermal forming, isothermal correcting, heat treatment, machining and macro etching as well as vacuum heat treatment; macro etching bath solution includes 120ml/L of HF(42%), 260ml/L of HNO3(65-68%), 160ml/L of H3PO4(85%) and 25g/L of urea, the balance water; uniform equiaxial alpha phase structure is taken as structure in ideal state, thus heterogeneous microstructures corresponding to macro topographies in different colour contrasts can damage the overall performance of blade more or less and can be determined according to structure type, location and region size thereof. The invention has the advantages that standard photograph is made to be used as basis for macro-etching detection, so as to save expense for blade dissection and shorten blade judging period; and meanwhile forging technical standard is complete, so that production efficiency is improved.

Description

technical field [0001] The invention relates to the field of judging the metallurgical quality of titanium alloy blades, and in particular provides a method for low-magnification corrosion inspection of the metallurgical quality of titanium alloy blades. Background technique [0002] Streamline is the regular pattern that the collection of directional deformation traces of metal materials exhibits in low-magnification corrosion during the forging process of forgings. 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. Contents of the invention [0003] The purpose of the present invention is to provide an early understanding of the performance of titanium alloy forgings, especially to provide a method for ...

Claims

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Application Information

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Patent Type & Authority Applications(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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