Effect of medium on friction and wear properties of compacted graphite cast iron processed by biomimetic coupling laser remelting process

Effects analysis of ambient conditions on process of laser surface melting

“…In other works, the different conditions of water surrounding impacts on molten zone are mentioned. For biomimetic coupling laser remelting, the melted unit processed in water membrane was smaller than that in air [21]. Besides in a spectacular report from Kumar [19], the molten depth increases and width decreases for keyhole formation in water medium.…”

“…The longitudinal and transverse stresses are reduced but normal stress is increased using water assist, and the effects for case 3 are more significant. Combining these thermal stress statuses with water-assisted melting results in reports [19,21], besides to the improved stress distributions, finer micro-structure and lower friction coefficient as well as higher micro-hardness can be obtained in the melted zone, which are correlated to the improvements in mechanical properties.…”

“…According to Guo et al, the medium effect on mechanical properties of cast iron in biomimetic coupling LSM was researched. They drew the conclusion that the application of water film played a key role in improving the friction properties and wear resistance [21]. From the reviews above, it is seen that most investigations are concentrated in under water laser processing and the thermo-mechanical performances were not analyzed enough.…”

Effect of one-step laser processed biomimetic coupling units' degrees on rolling contact fatigue wear resistance of train track alloy steel

“…In the past few years, Zhou et al have studied the fatigue wear resistance of cast iron and tool steel. According to previous reports, the facts that the wearable surface with units processed by laser can enhance the wear resistance of tool steel and cast iron under sliding wear condition significantly has been proved [16][17][18]. The surface with units presented the alternated hardness as the shape of ground beetles' elytrum or tree leaf, in which the units are identified as biomimetic units.…”

The evaluation of the influence of laser treatment parameters on the type of thermal effects in the surface layer microstructure of gray irons

“…In spite of extensive research concerning LHT of gray iron [12][13][14][15][16][17][18][19][20][29][30][31][32][33][34][35][36][37][38], it is still hard to determine the range of laser treatment surface modifications such as remelting, alloying, hardening from the solid state, tempering the surface layer in individual ranges of laser beam parameters (power density and its interaction time).…”