MOLYBDENUM FORGING PROCESS DEVELOPMENT
Abstract
A reproducible process for forging thin-section shapes of TZM alloy was demonstrated. Forgings produced met all contract requirements including surface finish (125 RMS) and web thickness (0.130 in. max.). An approved modification of the original flame-shield design incorporating one heavy central rib instead of two thin ribs and appropriate changes in forging dies was made. The effects of forging and annealing temperatures, methods of forming blanks, trimming, the number of forging blows per heat, in-process and final conditioning, positioning of the forging blank, and cleanliness were investigated in relationship to forgeability and final quality. Some of the above would be required to produce any new forging, some were performed in earlier phases but with less emphasis on forgeability, some might be classified as shop practice or die design but all of it was essential to successful production of the desired forging. Some essential features of the developed process are: (1) rapid transfer from furnace to die; (2) restricting time in forging dies by limiting forging to only a few rapid, hard blows per heat (one blow per heat for this forging); (3) repeated reheats; (4) in-proc ess anneals; and (5) careful in-process conditioning.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 14, 1963
- Accession Number
- AD0407523
Entities
People
- A. W. Goldenstein
Organizations
- Westinghouse Electric Corporation