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<p>The research investigates the microstructural and slurry abrasive analysis of NiCrBSiC hardfacing coatings produced by plasma transferred arc welding (PTAW) at optimized parameters: 126 A arc current, 100&#xa0;mm/min welding speed, 13&#xa0;g/min powder feed rate, 600&#xa0;mm/min oscillation speed, and 2.9 L/min plasma gas flow. Microstructural analysis revealed carbides and borides, including α-Cr<sub>7</sub>C<sub>3</sub>, β-(Cr, Fe)<sub>7</sub>C<sub>3</sub>, δ-Cr<sub>23</sub>C<sub>7</sub>, θ-Ni<sub>3</sub>B, ψ-CrB, μ-Cr<sub>2</sub>B, and γ-Ni. Wear resistance was assessed using ASTM G105, showing a weight loss of 0.0021&#xa0;g for coated samples versus 0.038&#xa0;g for uncoated SS410. SEM analysis revealed Cr-rich carbides and borides resisting wear, producing smooth wear scars, unlike the severe micro-cutting and delamination in uncoated samples. The study highlights the significance of PTAW parameter optimization in achieving superior wear-resistant coatings for aggressive environments and extended component life.</p>

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Advanced Manufacturing Perspectives on NiCrBSiC Hardfacing: Microstructural and Wear Performance Analysis

  • 期刊论文

  • 发表日期：

    2025年6月11日

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  • Dhiraj D. Deshmukh,
  • Sachin P. Kakade,
  • Avishkar Bhoskar

摘要

The research investigates the microstructural and slurry abrasive analysis of NiCrBSiC hardfacing coatings produced by plasma transferred arc welding (PTAW) at optimized parameters: 126 A arc current, 100 mm/min welding speed, 13 g/min powder feed rate, 600 mm/min oscillation speed, and 2.9 L/min plasma gas flow. Microstructural analysis revealed carbides and borides, including α-Cr7C3, β-(Cr, Fe)7C3, δ-Cr23C7, θ-Ni3B, ψ-CrB, μ-Cr2B, and γ-Ni. Wear resistance was assessed using ASTM G105, showing a weight loss of 0.0021 g for coated samples versus 0.038 g for uncoated SS410. SEM analysis revealed Cr-rich carbides and borides resisting wear, producing smooth wear scars, unlike the severe micro-cutting and delamination in uncoated samples. The study highlights the significance of PTAW parameter optimization in achieving superior wear-resistant coatings for aggressive environments and extended component life.