Abstract
In this report, the effects of copper and nickel plating in advance of welding on the solid phase weldability of beryllium-copper are studied, using the so-called 25-alloy bar which contains about 2.0%Be. The results obtained are summarized as follows.
[1] Optimum thickness of plating for welding is about 5μm in copper and 2.5μm in nickel, respectively.
[2] Even in this process, the weldable temperature can not be reduced as low as the aging temperature.
[3] Change of weld strength with welding time is unnoticeable in copper plated weld. But nickel plated weld often becomes weak because of occurrence of defect which looks like precipitate or kirkendall void.
[4] By proper copper plating in advance welding and heat treatment after welding together, such a nearly strong weld as the parent metal can be obtained.
