Machine Casting of Ferrous Alloys
Interim rept. no. 3, 1 Jul 1974-30 Jun 1975
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MATERIALS SCIENCE AND ENGINEERING
Pagination or Media Count:
This report covers the research for the period of the eighteenth to the thirthieth month of a four-year program. During this period the Continuous Rheocaster has been greatly improved and a machine casting system using semi- solid alloys Thixocasting has been developed and operated on pilot basis using a copper base alloy. Work has also continued on low temperature model systems, and on other supporting studies. The high temperature Continuous Rheocaster described earlier has undergone extensive modification and development. It has been used to continuously produce a number of ferrous alloy slurries and a cobalt base superalloy slurry. The apparatus has now been optimized for continuous production of larger quantities of Rheocast ingots, and several hundred pounds have been produced of the model bronze alloy employed previously 905 alloy 88wtCu, 10wtCu, 10wtSn, 2wtZn. Internal die temperature measurements were made during the casting of both liquid and semi- solid bronze alloy 905. The low temperature Continuous Rheocaster has been used with the model Sn-Pb alloys employed previously to examine the effects on the slurry structure of cooling rate, shear rate, composition and volume fraction solid. The feasibility of a modified Thixocasting process termed Clap Casting has been demonstrated.
- Metallurgy and Metallography
- Fabrication Metallurgy