Product Code: ICAL07_P541

Liquid Thermal Cycle during Double-track Laser Cladding of H13 Tool Steel
Jyoti Mazumder, CLAIM, University of Michigan; Ann Arbor MI USA
Xiuli He, CLAIM, University of Michigan; Ann Arbor MI USA
Presented at ICALEO 2007

Laser cladding based Direct Metal Deposition (DMD) has received significant attention due to its diversified potential for material processing. Numerical modeling not only helps to understand the complex physical phenomena involved in this process, it can also be used in the process prediction and system control. The evolution of temperature and velocity fields, composition profile during multiple track laser cladding observed during Direct Metal Deposition (DMD) of low carbon steel is simulated using a three dimensional self-consistent model, based on the solution of the equations of conservation of mass, momentum, energy and solute transport in the liquid pool. The heat transfer, phase changes, mass addition, fluid flow and interactions between the laser beam and the coaxial powder flow are considered in the calculation. Level set method is implemented to track the free surface movement of the liquid pool. The liquid thermal cycle, especially for overlap between adjacent laser tracks are simulated. The cladding geometry, including cladding height, depth and width can be predicted, which will be used in system closed loop control to obtain desired cladding geometry in the future.

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