Study on the relationship between intervals among laser stripes and the abrasion resistance of biomimetic laser textured surfaces

In our previous study, biomimetic laser hardening was proven to be a more promising method in improving the abrasion resistance of tribological loaded surface manufactured in brake shoe. In the present work, in order to study the relationship between the abrasion resistance of biomimetic laser textured surfaces and the intervals among parallel distributed biomimetic laser hardening stripes, steel samples were modified by laser stripes with different interval distances, and dry sliding wear tests for all these biomimetic samples were conducted. The result denotes that with the increase of interval distance from 2.5 mm to 5.0 mm, the abrasion resistance of samples undergone an increasing trend at first and a decreasing trend after that. The proposed wear mechanism indicates that the proportion of area of soft phases has strong correlation with the abrasion resistance of biomimetic surfaces. When interval distance among laser stripes became larger than 3.5 mm, with the increase of distance, the wear mass loss increased because damages on soft phases played leading roles in enhancing wear extent. However, when intervals ranged from 2.5 mm to 3.5 mm, the beneficial effect of soft phase reflected gradually.