Machine Casting of Ferrous Alloys
Final rept. 30 Jun 1976-30 Jun 1977
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MATERIALS SCIENCE AND ENGINEERING
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During this year the basic Rheocasting system, which was fully operational at the beginning of the year, was improved in various ways to increase reliability and productivity. Specific improvements were the addition of a reducing gas in the melting chamber, a shield gas extension nozzle and graphite inserts at the bottom of the Rheocaster to eliminate hot spots. Large quantities of 304 and 440C stainless steel alloys were cast during this period approximately 800 pounds of 304 and 2000 pounds of 440C and smaller quantities of other materials were also Rheocast including M2 tool steel, and HS 31 Cobalt base superalloy. Improvements in details and automation of the Thixocasting process were also made during this period. Work subsequently concentrated on casting large quantities of stainless steel into various die materials in order to determine die life and to optimize that die life.
- Metallurgy and Metallography
- Fabrication Metallurgy