Arc deposition of metal onto a substrate.

摘要

Metal from strip feedstock 3 is arc-deposited onto a substrate 1, being propelled when molten by a gas curtain from a slit 13. The feedstock 3 is melted in regularfashion by an arc 11 struck between it and a helical non-consumable electrode 9 rotated on its axis, which is parallel to the leading edge of the feedstock 3. As the electrode 9 rotates, the arc 11 must move along the helix to keep its shortest path, and hence is constrained to traverse the full width of the feedstock 3 repetitiously.