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建立直接金属烧结温度场的有限元模型,将辐射热、有效热传导率及材料属性随温度而变化等因素均考虑在内,运用ANSYS软件对烧结功率、激光束直径、烧结时间和间隔时间等激光发生装置的一些相关参数进行研究,并分析了对烧结层非均匀温度场分布的影响。结果表明,温度会随激光束半径的增加而增加,但当烧结半径达到0.10 mm之后,温度会随烧结半径的增加而减少;温度会随烧结时间的延长而增加,而随间隔时间的延长而降低;温度会随扫描间距的增加而降低。
The finite element model of the direct metal sintering temperature field was established. The radiant heat, the effective thermal conductivity and the change of the material properties with the temperature were taken into account. The laser power of the sintering power, laser beam diameter, sintering time and interval time Some relevant parameters of the device were studied and the influence on the distribution of inhomogeneous temperature field in the sintered layer was analyzed. The results show that the temperature will increase with the increase of the laser beam radius. However, when the sintering radius reaches 0.10 mm, the temperature will decrease with the increase of the sintering radius. The temperature will increase with the sintering time. With the extension of the interval time, Decrease; the temperature will decrease as the scanning distance increases.