激光辅助冷喷涂Stellite 6多颗粒沉积的数值模拟

针对激光辅助冷喷涂过程中Stellite 6多颗粒沉积机理的问题，运用有限元分析软件ANSYS/LS-DYNA对Stellite 6多颗粒在不同工艺参数下的碰撞过程进行了数值模拟，并与实验结果进行了比较分析。研究表明：多颗粒沉积过程，后续颗粒对先前沉积颗粒具有夯实作用，相邻颗粒间的变形能够填充颗粒间的空隙；颗粒沉积过程中无金属射流现象、无新物质生成、无氧化反应；Stellite 6颗粒在45钢基体上的沉积机制为镶嵌式的机械咬合。实验结果与数值模拟相吻合。

Numerical Simulation of Stellite 6 Multi Particle Deposition by Laser-Assisted Cold Spraying

Regarding to the problem of the deposition mechanism of Stellite 6 multi particle in the laser-assisted cold spraying process, finite element software ANSYS/LS-DYNA was applied to simulate the collision process of Stellite 6 multi particle under different technological parameters, and compared with the experimental results. The results showed that subsequent particles had compaction effect on the previous deposited particles and the deformation of adjacent particles can fill the gap between the particles in the particles deposition process. There were no metal jet phenomenon, no new material generation, and no oxidation reaction mechanism during the process of particle deposition. The deposition mechanism of Stellite 6 multi particle impacting on medium steel was embedded machinery occluding. And the experimental results were in agreement with the numerical simulation.