Machine Casting of Ferrous Alloys
Abstract
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 88wt%Cu, 10wt%Cu, 10wt%Sn, 2wt%Zn). 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1975
- Accession Number
- ADA018679
Entities
People
- J. R. Melcher
- K. P. Young
- Merton C. Flemings
- R. G. Riek
- R. Mehrabian
Organizations
- Massachusetts Institute of Technology