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Aero-engine blade tenon roughening texture coating treatment method and engine blade

A technology for aero-engines and engine blades, applied in the direction of engine components, machines/engines, coatings, etc., can solve problems such as fretting damage, shedding, and fracture, and achieve the effects of prolonging service life, enhancing hardness, and reducing friction and wear

Active Publication Date: 2017-12-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patent relates to the composite structure of dimple texture and coating, which utilizes the load-carrying capacity of dimple texture and the anti-friction and wear resistance of the coating. Failure modes such as fretting damage, falling off, and fracture are prone to occur during work

Method used

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  • Aero-engine blade tenon roughening texture coating treatment method and engine blade
  • Aero-engine blade tenon roughening texture coating treatment method and engine blade
  • Aero-engine blade tenon roughening texture coating treatment method and engine blade

Examples

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Effect test

example example 1

[0044] Step 1: Pre-treatment of the tenon surface 1, polishing the processed surface of the tenon to a mirror surface, ensuring that the roughness is less than 0.05um, and ultrasonic cleaning with alcohol for 20 minutes.

[0045] Step 2: Texturize the tenon surface 1. SPI fiber laser is used to roughen the tenon surface 1, that is, the upper surface. The output is collimated parallel light, the divergence angle is less than 0.4mrad, and the output beam quality is M 2 <1.1, the spot diameter is not more than 5mm, the output power is 100W, the pulse frequency is 10KHz, the laser wavelength is 1064nm, and the pulse width is 10us. Nitrogen was selected as the auxiliary gas, the blowing angle of the auxiliary gas was 20° to the normal direction of the workpiece, the gas flow rate was 10ml / min, and the textured morphology was spherical crown.

[0046] Step 3: Prepare the coating process. Ultrasonic clean the mortise obtained by laser texturing with alcohol and acetone for 20 minutes...

example example 2

[0052] Step 1: Pre-treatment of the tenon surface 1, polishing the processed surface of the tenon to a mirror surface, ensuring that the roughness is less than 0.05um, and ultrasonic cleaning with alcohol for 20 minutes.

[0053] Step 2: Texturize the tenon surface 1. SPI fiber laser is used to roughen the tenon surface 1, that is, the upper surface. The output is collimated parallel light, the divergence angle is less than 0.4mrad, and the output beam quality is M 2 <1.1, the spot diameter is not greater than 5mm, the output power is 200W, the pulse frequency is 60KHz, the laser wavelength is 1064nm, and the pulse width is 35us. Nitrogen was selected as the auxiliary gas, the blowing angle of the auxiliary gas was 40° to the normal direction of the workpiece, the gas flow rate was 200ml / min, and the textured morphology was spherical crown.

[0054] Step 3: Prepare the coating process. Ultrasonic clean the mortise obtained by laser texturing with alcohol and acetone for 20 min...

example example 3

[0059] Step 1: Pre-treatment of the tenon surface 1, polishing the processed surface of the tenon to a mirror surface, ensuring that the roughness is less than 0.05um, and ultrasonic cleaning with alcohol for 20 minutes.

[0060] Step 2: Texturize the tenon surface 1. SPI fiber laser is used to roughen the tenon surface 1, that is, the upper surface. The output is collimated parallel light, the divergence angle is less than 0.4mrad, and the output beam quality is M 2 <1.1, the spot diameter is not more than 5mm, the output power is 400W, the pulse frequency is 120KHz, the laser wavelength is 1064nm, and the pulse width is 70us. Nitrogen is selected as the auxiliary gas, the blowing angle of the auxiliary gas is 0-60° to the normal direction of the workpiece, the gas flow rate is 450ml / min, and the textured morphology is spherical crown.

[0061] Step 3: Prepare the coating process. Ultrasonic clean the mortise obtained by laser texturing with alcohol and acetone for 20 minutes...

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Abstract

The invention provides an aero-engine blade tenon roughening texture coating treatment method and an engine blade. The aero-engine blade tenon roughening texture coating treatment method comprises the following steps that the surface of a tenon is subjected to pretreatment; the surface of the tenon is subjected to roughening machining, and a spherical-crown-shaped type with the roughening shape being convex in the middle and concave at the two edges is obtained; coating technique preparation is conducted; a Zr transitional layer is deposited; and an MoS2 soft coating is deposited. According to the aero-engine blade tenon roughening texture coating treatment method and the engine blade, the tenon part of the aero-engine blade adopts a roughening (a concave-convex composite structure) texture and a soft coating composite structure; the roughened surface hardening effect is utilized to enable the tenon to be tightly engaged with a mortise, fretting damage is avoided, and meanwhile the soft coating can achieve the friction reduction and abrasion resistance effects; and the concave pit part of a roughening structure can also collect a soft coating material. All the structural functions are coordinated and coupled, the connecting reliability between the tenon and the mortise can be effectively reinforced, the fatigue strength of the surface of the tenon is improved, friction and abrasion are reduced, the fretting damage and fatigue breakage are avoided, the connecting reliability of the tenon and the mortise of the aero-engine blade are greatly improved, and the service life is greatly prolonged.

Description

technical field [0001] The invention belongs to the surface treatment technology of aero-engine blades, in particular to an aero-engine blade mortise texture coating treatment method and an engine blade. Background technique [0002] The tenon and tenon joints of aeroengine blades often have slight relative sliding between the joint surfaces. In actual working conditions, when the engine speed changes, the blades vibrate, and the tenon and tenon joints vibrate accordingly. When the vibration amplitude When it is too large, the tenon and tenon joint will break. [0003] When the vibration amplitude of the aeroengine blade is large to a certain extent, when the stress caused by the vibration bending stress superimposed on the centrifugal load exceeds the fatigue strength of the blade, it will lead to the fatigue fracture failure of the blade. [0004] Aeroengine blades are often made of titanium alloy, which is extremely sensitive to fretting damage due to its large friction ...

Claims

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Application Information

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IPC IPC(8): C23C14/06C23C14/35C23C14/32C23C14/02F01D5/14F01D5/28
CPCC23C14/022C23C14/025C23C14/0623C23C14/325C23C14/35F01D5/141F01D5/286F01D5/288F05D2230/31F05D2230/90F05D2240/31
Inventor 解玄华希俊尹必峰张培耘王浩俆上符永宏
Owner JIANGSU UNIV
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