Wear Performance of GCr15 Friction Pairs with Effect of Initial Radial Micro-grooves

(E-pub Ahead of Print)

Author(s): Wei Yuan*, Shengkai Mei, Song Li, Zhiwen Wang, Jie Yu, Qianjian Guo.

Journal Name: Micro and Nanosystems

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Micro-grooves perpendicular to sliding direction, can be machined on discs of friction pairs using electrical discharge machining, and then its effect on the wear performance of GCr15 material was studied. OLVF was used to on-line visually monitor the wear process to research the wear rate changing characteristic, and profile meter, SEM and metallurgical microscope were used to observe the wear scars specifically. Results show that compared to the non-groove test, i) in one-groove test, wear volume rate was approximately the same, and the wear scar was smooth, ii) when the grooves were more than 4, the test running-in stage would be obviously prolonged, particularly for the test with 8 grooves on the disc, the duration of running-in stage was 4 times than that without grooves on specimen, and the wear rate and volume increased significantly, the parameter Kt decreased with fluctuation, iii) the abrasive wear can be avoided with the debris stagnating in the groove, however, fatigue wear will significantly emerge. Therefore, abrasive wear can be avoided and smooth running-in surfaces can be obtained with proper amount of initial radial micro-grooves.

Keywords: Radial groove, friction pairs, wear properties, debris features, ferrograph.

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Article Details

(E-pub Ahead of Print)
DOI: 10.2174/1876402911666190117154327
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