Criteria for the Weldability of Contact Materials in Adiabatic Transient Conditions

A criterion of weldability of contact materials in adiabatic ransient conditions is determined as a quantity which is directly proporional to the square root of the adiabatic welding integral (i.e., the Joule veiding integral) and inversely proportional to the contact material hardless at the temperature before the transient process starts. In the range of he rated operating temperatures, the criterion appears to be almost independent of the welding integral for the most practical contact metals beause of the coincident reduction in hardness. The values of this criterion are calculated and compared versus a similar criterion for the steady-state egime, for most metals, a number of alloys, and some of the sintered compounds usually applied in contact design.