Here's my problem : a friend of mine rides on a 20" wheeled recumbent. The rear wheel is strangely laced and uses custom-made spokes with a special lengths. He broke a spoke this week-end and wasn't able to get a replacement at the LBS. Unfortunately, he needs his bike to commute, and asked me if I knew how to make a replacement spoke in a hurry.
Since I don't have a thread rolling machine, I thought about shortening a standard spoke at the elbow end, then forge a new elbow and swaged end. Of course, that would require heating the spoke and therefore removing any heat treatment it might have received.
So my question is this: does anybody know exactly what kind of heat treatment spokes receive ? I assume the metal needs quenching then annealing and/or stress-relieving, but I don't know the exact tempering temperatures for stainless steel, and I don't know if this would work for cold-drawn steel, or even if spokes need any heat treatment at all.