Effect of microgrooves generated by machining on tribological properties of 20CrNiMo/ beryllium bronze tribopairs under low-speed and heavy-load conditions
Restricted accessResearch articleFirst published online July, 2016
Effect of microgrooves generated by machining on tribological properties of 20CrNiMo/ beryllium bronze tribopairs under low-speed and heavy-load conditions
Mechanical engraving surface texturing methods are proposed, and pin-on-disc configuration tribological tests are carried out to investigate the effect of microgrooves, with different microgrooved direction and area ratio, on tribological performance of rock bit sliding bearing (RBSB). The RBSB, always working under low-speed and heavy-load conditions, is made of 20CrNiMo /beryllium bronze. Compared with untextured samples, wavy microgrooved tribopairs with area ratio of 5% and reference angle of 15° exhibit lower friction coefficient and wear rate. Experimental results show a reduction of 54% in friction and 78.8% reduction for wear rate, revealing that microgrooves show great potential in improving the service life of RBSB.
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