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<p>This study investigates how laser processing parameters specifically power, powder feeding rate, and scanning speed affect the performance of NiCrBSi/60 wt% WC composite coatings applied via laser cladding onto a AISI 316&#xa0;L steel substrate. A set of seven experiments was designed to systematically explore these variables. The coating’s surface morphology, microstructure, hardness, and wear behavior were evaluated using scanning electron microscopy. The findings reveal that power has the main pronounced influence on the coating porosity, while powder feeding rate primarily determines the cladding cracks. Scanning speed has a crucial influence in controlling the reinforcement agglomeration. Additionally, laser power was identified as the dominant factor influencing both the Vicker’s microhardness and wear rate of the coating. An increment in power led to a noticeable reduction in microhardness. The microhardness has enhanced 382.32, 323.74% respectively for best and worst performing samples compared to substrate. The wear rate was improved 77.55, 40.84% respectively for best and worst performing samples compared to substrate. The dominant wear mechanisms identified in the coatings were abrasion and delamination. </p>

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Effect of Laser Cladding Parameters on Tribological Behaviour of NiCrBSi-60 WC Composite Claddings

  • 期刊论文

  • 发表日期：

    2026年2月28日

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  • Mondi Rama Karthik,
  • Mulpur Sarat Babu,
  • Lakshmi Manasa Birada

摘要

This study investigates how laser processing parameters specifically power, powder feeding rate, and scanning speed affect the performance of NiCrBSi/60 wt% WC composite coatings applied via laser cladding onto a AISI 316 L steel substrate. A set of seven experiments was designed to systematically explore these variables. The coating’s surface morphology, microstructure, hardness, and wear behavior were evaluated using scanning electron microscopy. The findings reveal that power has the main pronounced influence on the coating porosity, while powder feeding rate primarily determines the cladding cracks. Scanning speed has a crucial influence in controlling the reinforcement agglomeration. Additionally, laser power was identified as the dominant factor influencing both the Vicker’s microhardness and wear rate of the coating. An increment in power led to a noticeable reduction in microhardness. The microhardness has enhanced 382.32, 323.74% respectively for best and worst performing samples compared to substrate. The wear rate was improved 77.55, 40.84% respectively for best and worst performing samples compared to substrate. The dominant wear mechanisms identified in the coatings were abrasion and delamination.