Electroslag Remelting
Abstract
This interim report describes research conducted at the Massachusetts Institute of Technology on macrosegregation in ingots produced by the electroslag remelting (ESR) process. The work has been on producing small experimental ingots in the laboratory, determining the severity of segregation in those ingots, and comparing the segregation with calculations using macrosegregation theory. Two different types of experimental apparatus are described herein. The first, employed for A1-4%Cu, is a small scale ESR unit which consists of a DC power source, a water cooled mold, consumable electrodes, and slag layer as in conventional ESR processing. The second type of apparatus is one which simulates the solidification of an ESR ingot but does not employ slag. The unit, used for Sn-15%Pb, comprises a source of melt droplets, a cooled mold, and a heat source to simulate the heat input of the ESR process. Results of macrosegregation in a series of five Al-4%Cu experimental ingots show that severe-localized segregates, as sometimes found in large commercial ingots, cannot be produced using this alloy cast in the small-scale ESR molds (7.6 cm in diameter). Surface to center compositional variations are produced enabling a comparison with calculations using macrosegregation theory.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1976
- Accession Number
- ADA037481
Entities
People
- D. R. Poirier
- Merton C. Flemings
- R. Furlong
- S. Kou
Organizations
- Massachusetts Institute of Technology