Effect of rare earth-al additions on the structural variations of medium carbon Fe-B cast alloy

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Abstract

This study investigates the effect of rare earth and aluminium composite modification on the structural variations of as-cast and heat treated medium carbon Fe-B cast alloys. The as-cast microstructure of Fe-B cast alloy consists of the eutectic boride, pearlite, martensite and ferrite. Moreover, compared to a netlike distribution of the coarse eutectic borides in the unmodified alloy, the eutectic boride structures in the modified alloy are greatly refined and less interconnected. After heat treatment, the phases in Fe-B cast alloy consist of the boride and martensite. The addition of rare earth helps to increase the number of the rod-shaped and round borides in Fe-B cast alloy during austenitizing. Compared to the unmodified alloy, the boride volume fraction and Rockwell hardness of the modified alloy have no significant change, however, the average area of each boride in the modified alloy is lower and the impact toughness is higher.

Original languageEnglish
Title of host publicationScience and Processing of Cast Iron IX
PublisherTrans Tech Publications Ltd
Pages213-218
Number of pages6
ISBN (Print)9780878492275
DOIs
StatePublished - 2011
Event9th International Symposium on Science and Processing of Cast Iron, SPCI-9 - Luxor, Egypt
Duration: 10 Nov 201013 Nov 2010

Publication series

NameKey Engineering Materials
Volume457
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference9th International Symposium on Science and Processing of Cast Iron, SPCI-9
Country/TerritoryEgypt
CityLuxor
Period10/11/1013/11/10

Keywords

  • Aluminium
  • Boride
  • Boron
  • Cast alloy
  • Rare earth

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