DEVELOPMENT OF HIGH STRENGTHS AND HIGH RECRYSTALLIZATION TEMPERATURES IN MOLYBDENUM-BASE ALLOYS

摘要

The greatest single deterrent to rapid advancements in the development of molybdenum-base alloys has been the lack of facilities specifically de-signed for the primary working or breaking down of the cast structure of large arc-cast bodies. Thus, the prime objective of this program was to pre-pare and study molybdenum-base alloys representing optimum compositions from the standpoint of compatibility with existing process equipment, although it was realized that these alloys were probably not optimum from the standpoint of the alloy systems per se. Initial studies involved higher alloy castings than had previously been evaluated at this laboratory, Evaluation of the soundness, machinability, hot hardness and forgeability shed light on the practicability of preparing large castings of these alloys in the consumable electrode equipment. Some effort was also directed toward a better under-standing of the variables associated with the extrusion of large bodies of molybdenum.