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Processing method for realizing integrity of surface of titanium alloy impeller

A technology of surface integrity and processing method, applied in the processing field, can solve problems such as blanking of specific steps of processing, and achieve the effect of improving life and obvious effect.

Inactive Publication Date: 2013-02-13
HARBIN DONGAN ENGINE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] These impeller surface integrity requirements can guarantee the life of the impeller, but the specific steps for its processing are still blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] The second-stage impeller of a turboshaft aeroengine is made of titanium alloy, and the required indicators after processing are:

[0039] Blade surface roughness reaches Ra0.4;

[0040] Surface residual stress requirements: if the stress measurement value |σ|≥210 MPa, then the stress change at each point satisfies Δσ≤60 MPa, and the tangential stress satisfies τ≤8 MPa; if the stress measurement value |σ|< 210 MPa, then The stress change at each point satisfies Δσ≤30 MPa or σ / 4 (the largest of the two values), and the tangential stress satisfies τ≤8 MPa;

[0041] After grinding, the surface has no burns and no surface hardening.

[0042] The specific implementation process is as follows:

[0043] (1) Forging molding: forging into blank;

[0044] (2) Rough machining: Rough machining of the blank, the allowance after machining is 1mm, rough machining of the reference, the allowance after machining is 0.5mm;

[0045] (3) Finishing datum: Finishing datum to size require...

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Abstract

The invention relates to a processing method for realizing integrity of a surface of a titanium alloy impeller. Through selection for equipment, designs for processes and setting for parameters, the integrity of the surface of the impeller reaches a required standard; meanwhile, in order to ensure a requirement on luminosity of the surface of the impeller, an abrasive particle flow surface polishing technology is adopted. According to the processing method, service life of the impeller is effectively improved, and an effect is obvious when the processing method is applied to an actual processing process for products.

Description

technical field [0001] The invention relates to a processing method, in particular to a processing method for the surface integrity of a titanium alloy impeller. Background technique [0002] The processing of titanium alloy impellers in the existing aviation field is generally milling after turning, and the surface integrity of the impeller is not supplemented too much, resulting in a generally low life of the impeller, which does not meet the design requirement of the minimum life of 40,000 times cycle. Therefore, in order to improve the life of the impeller, it is necessary to put forward new requirements for the surface integrity of the impeller, namely: [0003] Blade surface roughness reaches Ra0.4; [0004] Surface residual stress requirements: if the stress measurement value |σ|≥210 MPa, then the stress change at each point satisfies Δσ≤60 MPa, and the tangential stress satisfies τ≤8 MPa; if the stress measurement value |σ|< 210 MPa, then The stress change at e...

Claims

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Application Information

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IPC IPC(8): B23P15/02
Inventor 田丽波郭君伟王铁海刘可郑洪涛刘金慧示金刚
Owner HARBIN DONGAN ENGINE GRP
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