TA2表面Ni-P-B电镀层的激光重熔涂层结构与力学性能

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中图分类号：TG146.4 文献标志码：A 文章编号：1671-5276（2025）06-0062-05

Abstract：Inanefort tobolsterthewearresistanceofTA2aloy，asopisticateddual-stagesurfaceenhancement technique was used，integratingcompositeelectroplatingwithlaserremeltingtodepositaNi-P-BcompositecoatingatoptheTA2surface.The inovativeuseofanelectroplatedlayerasaprecursortolaserremelting standsinforthetraditional methodsofpowderfeedingor compaction，adeptlymitigating theisuesofpowderaggegationorejectionunderthelasersinfluence.Thisapproachnotonly economizesonmaterialcostsbutalso elevates thecoating'sintegrityandaligns witheco-friendlystandards.Theresultsof the microstructure analysis showthat excellnt metallurgical bonding isobtainedbetween thecoating and substrate，andcracksor pores are not found in the coating. The coating is mainly composed of TiNi/Ti -2 Ni intermetallic compounds and TiB/TiB 2 ceramic phases，whichcanefectivelyincreasethehardnessandwearresistanceof theTA2surface.Thesehardconstituentssubstantilly augment the alloys hardness and wearresistance.Thecompositecoating achievesaremarkable hardnesspeak of 920 HV， significantlysurpassingthatoftheunderlyingTA2substrate.Moreover，thecoatingexhibitsareducedcoeffcientoffriction compared to the substrate，a testament to its enhanced wear-resistant properties.

Keywords：laser remelting；TA2；Ni-P-B composite electroplating；hardness；wear resistance

0 引言

钛合金因其优异的力学性能、耐蚀性、生物相容性以及在高温下良好的比强度而在航空、航天、医疗和化工等领域得到了广泛应用[1-3]。（剩余6788字）