Keyhole formation
Keyhole formation
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锁孔形成
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
E. Metzbower
中科院分区：
文献类型：
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作者：
E. Metzbower
根据板化学成分中元素蒸发产生的功率损失和最小功率密度，计算了“小孔”的尺寸和温度以及正在与小孔焊接的金属板上表面上的熔池。产生小孔。蒸发功率损耗被设置为等于用于表示激光束的高斯功率密度。其结果是整个锁孔的温度分布。结果表明，低于最小峰值功率密度的峰值功率产生仅指示熔化的温度;等于最小功率密度的峰值功率产生达到元件的蒸发温度的温度;并且大于最小功率密度的峰值功率产生大于元件的蒸发温度的温度。将结果与激光熔池的一些视觉观察进行比较。
The size and temperature of the “keyhole” and melt pool on the top surface of a metal plate being welded with a keyhole have been calculated, based on the power loss resulting from evaporation of an element in the chemistry of the plate and a minimum power density required to produce a keyhole. The evaporative power loss is set equal to the Gaussian power density which is used to represent the laser beam. The result is a temperature distribution across the keyhole. The results indicate that peak powers below the minimum peak power density yield temperatures that are indicative of melting only; peak powers equal to a minimum power density yield temperatures that reach the evaporation temperature of the element; and peak powers greater than the minimum power density yield temperatures greater than the evaporation temperature of the element. The results will be compared to some visual observations of the laser melt pool.