Forming ingot mould cooling walls and jet - engine nozzle by explosion welding

摘要

Hollows are formed in at least one welding surface of a base element, and the hollows filled with a metal having a lower m.p. e.g. tin. After joining a second element to the welding surface of the first one by explosion welding, the metal with the low M.p. is removed from the cavities by melting.