A new spring pre-strengthening and finishing compound shot peening method

A shot blasting and finishing technology, applied in the direction of abrasives, metal processing equipment, manufacturing tools, etc., can solve the problems of large surface roughness and reduce surface roughness of spring steel, achieve large residual compressive stress, improve mechanical properties, and hardness high effect
CN102941536BInactive Publication Date: 2016-04-06SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2016-04-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a novel spring pre-strengthening finishing composite shot blasting method. The method includes that a spring is subjected to pre-strengthening finishing composite shot blasting by a shot blasting machine, the pre-strengthening finishing composite shot blasting includes three processes, the shot blasting strength is 0.23Amm in the first process, the shot blasting strength is 0.45Amm in the second process, the shot blasting strength is 0.15Amm in the third process, and shot blasting mediums of three-time shot blasting are same to obtain a processed spring product. Compared with shot blasting methods in prior art, the novel spring pre-strengthening finishing composite shot blasting method has the advantages that the beneficial effect of residual compressive stress is increased, and negative influences caused by surface roughness of a part can be avoided to greatest degree.
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Description

technical field

[0001] The invention relates to a pre-strengthening and finishing composite shot-peening process for carrying out shot-peening strengthening treatment on a spring test piece. It is used in the technical field of spring materials or parts surface strengthening. Background technique

[0002] Surface shot peening technology is a key manufacturing process to improve fatigue resistance, stress corrosion resistance and prolong service life of parts such as springs. It is currently widely used in the spring processing industry. The surface layer changes caused by shot peening include the introduction of residual compressive stress field, the generation of deformation and refinement structure, and the change of surface roughness. The service life of the component, although the increase of the surface roughness slightly reduces some properties of the material surface, but it is possible to avoid some adverse effects caused by the change of the surface roughness of th...

Claims

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