TiH2 添加量对多孔铜-锡-钛金刚石工具微观结构和性能的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2024-09-12 DOI:10.1016/j.triboint.2024.110241

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引用次数: 0

摘要

通过粉末预处理工艺和两步烧结工艺，使用 TiH2 粉末作为孔隙形成剂制造了多孔铜镍锡钛金刚石工具。研究了 TiH2 添加量（0-10 wt%）对工具微观结构、机械性能和干磨性能的影响。结果表明，最佳的 TiH2 添加量为 7.5 wt%，工具的多孔结构最好，金刚石表面的压应力最高。孔隙率、平均孔径、弯曲强度和显微硬度分别为 22.5%、2.3 µm、269 MPa 和 2.25 GPa。在干燥条件下，孔隙可以抑制碎屑的附着，从而提高刀具的磨削性能。而主要的失效模式是金刚石磨粒的微断裂。

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Effect of TiH2 addition amounts on the microstructures and properties of porous Cu-Sn-Ti diamond tools

Porous Cu-Sn-Ti diamond tools were fabricated by using TiH₂ powder as pore-forming agent through a powder pretreatment process combined with a two-step sintering process. Effects of TiH₂ addition amounts (0–10 wt%) on the microstructures, mechanical properties and dry grinding properties of the tools were studied. The results showed that the optimized TiH₂ addition amount was 7.5 wt%, and the tools had the best porous structures and the highest compressive stress on the diamond surfaces. The porosity, average pore size, bending strength and microhardness were 22.5 %, 2.3 µm, 269 MPa and 2.25 GPa, respectively. Under dry conditions, pores can inhibit the adhesion of debris, and thus improve the grinding performance of the tools. And the dominate failure mode was micro-fracture of diamond grits.

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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.