Abstract
Copper is widely used in heat exchangers, electro circuits, and mechanical parts because it has such excellent
properties as high thermal conductivity and high electrical conductivity. Since copper also has
excellent antibacterial and virus inactivation properties, we expect its use to increase for preventing infectious
diseases on handrails, doorknobs etc., because such surfaces and items are touched by many
people. Our research has focused on a laser metal deposition (LMD) method that can form a dense and
highly pure layer since a laser can directly melt and solidify coating material. In this report, we review a
high-speed, multi-beam laser coating method that has a low-contamination layer and demonstrate that a
pure copper layer is formed on a SUS304-type stainless plate.
