Integrated laser alloying-grinding for additive-subtractive manufacturing of Ti6Al4V surface with B4C coating

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL Tribology International Pub Date : 2025-04-01 Epub Date: 2025-01-14 DOI:10.1016/j.triboint.2025.110537

Yuan Hong , Cong Sun , Dawei Wang , Changhong Cao , Yanhui Tao , Yue Lu , Liang Ma

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Abstract

Laser additive technology is commonly utilized to prepare strengthened coatings on Ti6Al4V without considering surface precision and deformation. A secondary surface finishing is cumbersome with low productivity. Therefore, integrated laser alloying-grinding is proposed by combining laser additive strengthening with grinding subtractive shaping. The B₄C coatings are prepared for boron-carbon alloying of the Ti6Al4V. The high-energy laser makes the grinding process stable. The roughness S_a of the integrated laser alloying-grinding surface is reduced by 51 % compared to the conventional machined surfaces. The alloyed surface hardness reaches 750 HV, and its wear and corrosion resistance far exceeds that of the Ti6Al4V matrix. The integrated laser alloying-grinding can realize Ti6Al4V surface property-accuracy synergistic manufacturing and present in-depth theoretical instruction for surface anti-fatigue fields.

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B4C涂层Ti6Al4V表面增材减材加工激光合金磨削

激光增材技术通常用于制备Ti6Al4V强化涂层，而不考虑表面精度和变形。二次表面处理是累赘的，生产率低。为此，提出了激光加性强化与磨削减形相结合的一体化激光合金化磨削方法。制备了用于Ti6Al4V硼碳合金的B4C涂层。高能激光使磨削过程稳定。与传统加工表面相比，激光合金化磨削表面的粗糙度Sa降低了51 %。合金的表面硬度达到750hv，其耐磨损和耐腐蚀性能远远超过Ti6Al4V基体。激光合金化-磨削一体化可实现Ti6Al4V表面性能-精度协同制造，为表面抗疲劳领域提供深入的理论指导。

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.