Machine Casting of Ferrous Alloys
Abstract
The basic system for Thixocasting ferrous alloys is fully and reliably operational. The Continuous Rheocaster works dependably in production runs in which typically up to 500 pounds of steel is produced at a rate of about 80 pounds per hour. Much longer runs could be produced if desired. The Thixocast reheating process is completely automated. The two stage heating cycle employed delivers steel charges suitable for Thixocasting with a maximum temperature variation in the charge of + or - 3 C. Work has been primarily on 304 and 440C stainless steel. Emphasis during this period has been on the production of a large amount of Rheocast stainless steel and the initiation of large scale Thixocasting runs to test actual die life. More than 3000 pounds of Rheocast stainless steel have been produced to date. Five hundred stainless steel Thixocastings have been produced in a hardened H-13 steel die with die life superior to results reported for H-13 dies used for liquid cast steel. The castings produced showed consistently good internal soundness. This Thixocasting work has been primarily on 304 stainless steel; additional work is planned on 440C. Mechanical property evaluation of Thixocast 304 stainless steel indicates it possesses strength superior to the conventionally cast alloy with somewhat less ductility.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1976
- Accession Number
- ADA035715
Entities
People
- J. F. Boylan
- K. P. Young
- Merton C. Flemings
- R. G. Riek
- R. L. Bye
Organizations
- Massachusetts Institute of Technology