Vacuum recycling effect on minor elements in superalloys
Abstract
Superalloy recycling is an economical and strategical necessity. Scrap recovery is examined from a thermodynamical and technological point of view with emphasis on air melting with oxygen blowing to remove titanium and aluminum before vacuum treatment; and non reactive melting of conditioned scraps in vacuum induction melting. The vacuum effect on the carbon/oxygen reaction, desulfurization and nitrogen removal, and heavy metal distillation is examined. Further reactions during remelting in VAR or ESR are taking account to assure the quality of the final product.
- Publication:
-
In AGARD Mater. Substitution and Recycling 12 p (SEE N84-33465 23-23
- Pub Date:
- April 1984
- Bibcode:
- 1984msr..agar.....W
- Keywords:
-
- Heat Resistant Alloys;
- Reaction Kinetics;
- Recycling;
- Trace Elements;
- Vacuum Effects;
- Aluminum;
- Carbonization;
- Degassing;
- Denitrogenation;
- Desulfurizing;
- Oxidation-Reduction Reactions;
- Vacuum Melting;
- Engineering (General)