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Fatigue Test and Failure Analysis of GD8020×1100 Ball Screw Unit

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Abstract:

By means of chemical composition testing, scanning electron microscopy observation, metallographic observation and hardness gradient detection etc, analysis of the typical failure samples from a well-known brand GD8020×1100 ball screw unit in the fatigue test was carried on. Results show that there is no obvious surface wear of the ball screw, showing the normal contact fatigue failure. But severe surface wear happens on the raceway of nut A with obvious flaking and many local cracks; which is the main reason leading to the failure of ball screw unit. So effective measures to avoid earlier failure of the ball screw unit can be put forward by controlling the steel quality strictly and improving the hardness and depth of the hardened layer on the raceway of nut A.

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Info:

Periodical:

Applied Mechanics and Materials (Volumes 543-547)

Pages:

3848-3852

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.543-547.3848

Citation:

Cite this paper

Online since:

March 2014

Authors:

Ye Yan, Cheng Nan Li, Yu Hong Gai, Bao Min Li, Wei Du, Mu Sen Li*

Keywords:

Ball Screw Unit, Contact Fatigue, Failure Analysis, Fatigue Test, Surface Hardened Layer Depth

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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