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<p>Polycrystalline diamond (PCD) is a composite material with exceptional hardness and thermal conductivity, making it highly suitable for various industrial applications. However, cutting PCD, especially when backed by tungsten carbide (WC), presents significant challenges due to its brittle nature and the differences in material properties between the PCD layer and WC substrate. Water jet guided laser (WJGL) processing has emerged as a potential solution to overcome these challenges, providing advantages over conventional machining techniques such as electrical discharge machining (EDM) and traditional laser processing, which often result in thermal defects and limited productivity. This research investigates the impact of WJGL process parameters on the cutting performance of 2.6&#xa0;mm thick WC-backed PCD using a high-power nanosecond WJGL system with a 100 W laser source. Key parameters such as water jet pressure and scan speed were systematically varied to assess their effects on cutting speed, surface integrity, and material removal efficiency. The study demonstrates that higher water jet pressures and optimised scan speeds significantly improve cutting rates, achieving cutting speeds up to 6.2&#xa0;mm/min whilst minimising thermal damage. The findings suggest that WJGL is an effective method for machining WC-backed PCD, offering improved surface quality and productivity compared to conventional methods, thus opening new opportunities for advanced material processing.</p>

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Exploring the efficacy of water jet guided laser for cutting of tungsten carbide backed polycrystalline diamond

  • 期刊论文

  • 发表日期：

    2025年8月23日

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  • Louisa Wong,
  • Helen Elkington,
  • Ben Mason,
  • Sundar Marimuthu

摘要

Polycrystalline diamond (PCD) is a composite material with exceptional hardness and thermal conductivity, making it highly suitable for various industrial applications. However, cutting PCD, especially when backed by tungsten carbide (WC), presents significant challenges due to its brittle nature and the differences in material properties between the PCD layer and WC substrate. Water jet guided laser (WJGL) processing has emerged as a potential solution to overcome these challenges, providing advantages over conventional machining techniques such as electrical discharge machining (EDM) and traditional laser processing, which often result in thermal defects and limited productivity. This research investigates the impact of WJGL process parameters on the cutting performance of 2.6 mm thick WC-backed PCD using a high-power nanosecond WJGL system with a 100 W laser source. Key parameters such as water jet pressure and scan speed were systematically varied to assess their effects on cutting speed, surface integrity, and material removal efficiency. The study demonstrates that higher water jet pressures and optimised scan speeds significantly improve cutting rates, achieving cutting speeds up to 6.2 mm/min whilst minimising thermal damage. The findings suggest that WJGL is an effective method for machining WC-backed PCD, offering improved surface quality and productivity compared to conventional methods, thus opening new opportunities for advanced material processing.