Bimetallic bandsaw/hacksaw blade electron beam welding

Springfield (western Mass) firm with vacuum air feed-through EB system welding strip of high-speed steel (Mo/W tooth alloy) to spring-steel backing strip. Goes back to late '40s/'50s, among the earliest EB applications. Teaching point: niche EB application where the production-volume and value-added economics work.

Anybody ever go to Home Depot? More expensive bandsaw blades or hacksaw blades are bi-metal blades. Anybody know what that means? Not "buy" metal, B-U-Y, but bi-metal — bimetallic blades. This goes back to the late 1940s or 1950s for electron beam technology, which was really new at that time. A bi-metal blade — you've got a bandsaw blade with teeth that look sort of like this. You'd like the base steel to be spring steel which is hardened and very springy, with a lot of stiffness. You'd like the tips to be a high-speed steel with molybdenum or tungsten or other very expensive alloying elements, because these maintain their strength at high temperatures.