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Influence of Shot Peening Process on Contact Fatigue Behavior of Gears

机译：喷丸处理对齿轮接触疲劳行为的影响

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摘要

Shot peening is a cold working process used to increase mechanical strength of metal parts under fatigue load. It introduces compressive residual stresses and surface hardening in the surface layers of metallic materials by the impact of a shot flow against the metallic surface under controlled conditions. Shot peening can be made by using different kinds of machines, the most common of which are the pneumatic and the centrifugal ones. This article shows how the kind of process used can influence the. results of the treatment. Four groups of gears were peened using different peening machines (pneumatic and centrifugal). The measurement of residual stresses and hardness allowed to evidence the different effect of the shot peening process. Contact fatigue tests showed that contact fatigue life is influenced by the process selected and that the choice of the Almen Intensity should consider also the kind of machine used.
机译：喷丸处理是一种冷加工工艺，用于提高疲劳载荷下金属零件的机械强度。它通过在受控条件下，冲击流对金属表面的冲击，在金属材料的表面层中引入压缩残余应力和表面硬化。喷丸处理可以通过使用不同类型的机器来进行，其中最常见的是气动和离心机器。本文说明了所使用的过程类型如何对其产生影响。治疗结果。使用不同的喷丸机（气动和离心）对四组齿轮进行喷丸。残余应力和硬度的测量可以证明喷丸处理的不同效果。接触疲劳测试表明，接触疲劳寿命受所选过程的影响，Almen强度的选择也应考虑所用机器的类型。

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