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Influence of Process Parameters on Flatness During Single-Track Laser Cladding.

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|November 9, 2024
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Summary
This summary is machine-generated.

Achieving a flat laser cladding track is crucial for workpiece accuracy. This study identified optimal process parameters, including high scanning speed and laser power, alongside a low powder feed rate, to ensure superior cladding track flatness.

Keywords:
flatnesslaser claddingmolten pool morphologyparameter window

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Area of Science:

  • Materials Science and Engineering
  • Manufacturing Processes
  • Surface Engineering

Background:

  • Poor flatness of laser cladding tracks leads to uneven surfaces and reduced workpiece geometrical accuracy.
  • Optimizing process parameters is essential for achieving high cladding track flatness in laser cladding.

Purpose of the Study:

  • To establish a mesoscale model for simulating single cladding track formation.
  • To reveal the formation mechanism of cladding track flatness by analyzing molten pool dynamics.
  • To determine the influence of key process parameters on cladding track flatness.

Main Methods:

  • Development of a mesoscale model for laser cladding of CoCrMoSi powder.
  • Simulation of single cladding track formation and molten pool behavior.
  • Experimental validation of simulation results and parameter optimization.

Main Results:

  • The formation mechanism of cladding track flatness was elucidated through molten pool flow and solidification analysis.
  • Influences of laser power, scanning speed, and powder feeding rate on flatness were quantified.
  • A parameter window for high flatness was established: high scanning speed (> 260 mm/min), high laser power (> 2300 W), and low powder feed rate (< 5.5 g/min).

Conclusions:

  • The numerical model accurately predicts cladding track flatness.
  • Optimal process parameters are identified for achieving superior flatness in laser cladding.
  • The established parameter window provides guidance for industrial applications requiring precise surface geometry.