Local thermal aging and vibration-assisted local thermal aging method

A thermal aging and partial technology, applied in the direction of improving process efficiency, etc., can solve the problems of limited vibration aging effect, noise pollution, etc.

Inactive Publication Date: 2011-08-10
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

The limited effect of vibration aging and serious noise pollution are the main obstacles restricting the wide application of vibration aging method

Method used

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Embodiment Construction

[0021] The method of local thermal aging and vibration-assisted local thermal aging in the present invention; specifically comprises the following steps:

[0022] 1) According to the parameters of parts material, structural geometry, pre-processing and processing technology, through experience judgment or computer modeling virtual manufacturing technology, analyze the internal elastic energy and residual stress distribution of parts that need aging treatment, and determine the concentration of stress distribution Area and other process parameters;

[0023] 2) By analyzing the results in step 1), choose one of the following three aging treatment methods to treat the part:

[0024] (a) Parts are thermally aged locally only when their performance or structural characteristics are not suitable for vibration aging;

[0025] (b) When the natural frequency of the part material is significantly reduced after heating, and its natural frequency rises sharply after the heat source is re...

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Abstract

The invention provides a local thermal aging and vibration-assisted local thermal aging method. The method mainly comprises the following steps of: analyzing the internal elastic performance and the residual stress distribution of a part needing aging treatment by using experience judgment or a computer modeling virtual manufacturing technology according to parameters such as a part material, construction geometry, a primary machining and treating process and the like to determine process parameters such as a stress distribution centralized region and the like of the part; and performing thermal aging or thermal aging and vibration aging combined treatment on the part according to the parameters. By adopting the local thermal aging and vibration-assisted local thermal aging method, the aims of removing residual stress and homogenizing tissues are fulfilled. Compared with conventional thermal aging and vibration aging processes, the method has the advantages of effectively utilizing heat energy, saving energy sources and enhancing the aging effect, and ensures that the natural frequency of the part subjected to local heating is lowered, so that the vibration aging noises are greatly reduced.

Description

technical field [0001] The invention relates to a method for aging treatment to eliminate residual stress of components. Background technique [0002] Manufacturing processes such as casting, forging, rolling, and welding, as well as mechanical processing processes such as turning, cutting, milling, grinding, and drilling, may produce different degrees of residual stress inside metal parts. During subsequent processing or use, the residual stress of such parts will be released by itself due to changes in the environment, thereby affecting the dimensional accuracy and performance of the parts. Therefore, for parts with certain precision requirements, aging treatment is required before they become final products to remove and homogenize their residual stress. [0003] Aging methods can be divided into two categories: natural aging and artificial aging. The most widely used artificial aging methods in engineering are thermal aging and vibration aging. [0004] The thermal ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/30C21D10/00
CPCY02P10/20
Inventor 陈光南张坤彭青何伶荣吴臣武王明星肖京华罗耕星
Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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