Effect of laser surface texture on CuSn6 bronze sliding against PTFE material under dry friction

- Effect of texture on CuSn6 bronze sliding against PTFE under dry friction was studied.
- The projected ridge has a strong effect on friction and wear performance.
- Non-polished textured surfaces can reduce friction coefficient and increase wear rate.
- Wear debris and non-polished surface texture form a kind of hybrid texturing effect.

Three kinds surface texture was fabricated on CuSn6 bronze disc by laser texturing. The tests of textured disc sliding against PTFE material were carried out in dry friction condition using a pin-on-disc tester. The results shown that the projected ridge has a strong effect on friction and wear performance. The non-polished textured surface could reduce friction coefficient and increase wear rate of PTFE. Compared with smooth surface, the friction coefficient of grid groove surface, asterisk groove surface and circle groove surface decreased by 10.55%, 6.03% and 9.50% while the wear rate of PTFE increased by 47.05%, 41.48% and 27.21%, respectively. After being polished, both the friction coefficient and wear rate of PTFE are larger compared with smooth surface.