Method for detecting titanium alloy impeller surface completeness
A technology of surface integrity and detection method, applied in the field of detection
Inactive Publication Date: 2013-03-27
HARBIN DONGAN ENGINE GRP
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Problems solved by technology
However, for the various indicators of the surface integrity of the optimized processed titanium alloy impeller, how to carry out scientific and accurate detection, which detection methods to use and how to operate the technology are still blank
Method used
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Experimental program
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Effect test
Embodiment
[0096] The XX impeller of a turboshaft aero-engine is made of titanium alloy. The required surface integrity index is: the surface roughness of the blade reaches 0.4; the surface residual stress requirement: if the stress measurement value |σ|≥210 MPa, then the stress at each point The change satisfies Δσ≤60 MPa, and the tangential stress satisfies τ≤8 MPa; if the measured stress value |σ|< 210 MPa, then the stress change at each point satisfies Δσ≤30 MPa or σ (the largest of the two values), The tangential stress satisfies τ≤8 MPa; there is no grinding burn and no surface hardening after processing.
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Abstract
The invention relates to a method for detecting titanium alloy impeller surface completeness. The method for detecting the titanium alloy impellor surface completeness comprises the steps of setting measurement steps reasonably and selecting parameters so as to achieve the operation program and an operation method for detecting the surface toughness, the surface residual stress, the surface micro defects, grinding burn and surface hardening of a titanium alloy impellor; and the surface completeness of the impeller after machining is measured scientifically and accurately, and reliable data are provided for the design calculation and analyzing the fatigue service life of the impeller.
Description
technical field [0001] The invention relates to a detection method, in particular to a detection 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, new requirements are required for the surface integrity of the impeller. These requirements include: [0003] The surface roughness of the blade reaches 0.4; the surface residual stress requirements: if the stress measurement value |σ| σ|< 210 MPa, then the stress change at each point satisfies Δσ≤30 MPa or σ (the largest of the two values), and the tangential stress satisfies τ≤8 MPa; there is no grinding burn an...
Claims
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Login to View More IPC IPC(8): G01N21/88G01N21/64G01B21/30G01L1/25
Inventor 田丽波李铁军郭君伟王铁海刘可郑洪涛薄锡金雷云莲马瑞王静
Owner HARBIN DONGAN ENGINE GRP
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