Accession Number : ADA018679


Title :   Machine Casting of Ferrous Alloys


Descriptive Note : Interim rept. no. 3, 1 Jul 1974-30 Jun 1975


Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MATERIALS SCIENCE AND ENGINEERING


Personal Author(s) : Flemings, M C ; Mehrabian, R ; Melcher, J R ; Riek, R G ; Young, K P


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA018679


Report Date : Oct 1975


Pagination or Media Count : 140


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.


Descriptors :   *CASTING , *CASTING ALLOYS , *DIES , *IRON ALLOYS , *SUPERALLOYS , BRONZE , CASTINGS , COBALT ALLOYS , COPPER ALLOYS , EUTECTICS , HIGH TEMPERATURE , LEAD ALLOYS , MACHINES , PROCESSING , SLURRIES , TEMPERATURE , TIN ALLOYS


Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy


Distribution Statement : APPROVED FOR PUBLIC RELEASE