| 摘要 |
<p>The welding method is used to lay down weld beads on metallic substrates with a thin section, e.g., of down to 0.030 inch. The process employs a plasma transferred arc which is generated at low current, e.g., between 0.5 amps and 60 amps, and with a very high switching frequency, e.g., 15 KHz at the power supply. A low amount of heat is generated so that the thin section is not burned through. The surfacing powder is delivered into the arc and becomes metallurgically bonded to the substrate.</p> |
