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等离子堆焊时,合金粉末的送入方式对堆焊过程的稳定性及可靠性有很大影响。我们曾将喷咀设计成两节型的,由它们之间送入粉末(内送粉枪体)。但在堆焊过程中发现,有部分熔化的合金附着喷咀上,聚集到一定程度就以滴状下落,影响堆焊过程的稳定性。严重时,熔滴会堵塞喷咀而使堆焊中断。为了消除堵咀现象,设计了外送粉式等离子枪,见示意图。实践证明,这种送粉方式从根本上消除了在喷咀上附着熔滴和堵咀的。可能性。由于粉末输送畅通,使用这种堆焊
Plasma welding, alloy powder feeding method on the welding process stability and reliability have a significant impact. We have designed the nozzle into two sections, with the powder fed between them (the inner gun body). However, in the surfacing process found that some of the molten alloy attached to the nozzle, gathered to a certain extent drop drops, affecting the stability of the welding process. Seriously, the droplet will block the nozzle and the surfacing will be interrupted. In order to eliminate the phenomenon of plug blocking, designed to send powder plasma gun, see the schematic. Practice has proved that this powder feeding method basically eliminates the droplet attached to the nozzle and blocking Tsui. possibility. Due to the smooth delivery of powder, the use of such surfacing