Chemical additions to reduce hot tearing in the cast house

Elizabeth Sweet, J. A. Taylor, M. A. Easton, M. J. Couper, Nick C Parson

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

5 Citations (Scopus)


Hot tear susceptibility in VDC casting is strongly affected by the chemical additions of alloys, hardeners and grain refiners. This paper assesses a few different approaches to reducing hot tearing in the cast house. Grain refinement is one commonly used approach, including dosing at cast start. Another technique is to control the alloy content, through the additions of Si, Mg, Mn or Fe which can influence the type and amount of intermetallics present during the final stages of solidification when hot tearing occurs. This paper summarizes experimental findings which assess the influence of additions on a hot tear rating, particularly in 6xxx series alloys. Strategies which could be used in the cast house are discussed. While changes to the bulk metal can have consequences for alloy specification and quality control, additions at cast start could be used to reduce scrap from hot tearing without changing the composition of the saleable product.
Original languageEnglish
Title of host publicationLight Metals 2012
Subtitle of host publicationProceedings of the technical sessions presented by the TMS Aluminum Committee at the TMS 2012 Annual Meeting & Exhibition, Orlando, Florida, USA, March 11-15, 2012
EditorsCarlos E. Suarez
Place of PublicationHoboken, New Jersey
PublisherJohn Wiley & Sons
Pages1133 - 1138
Number of pages6
ISBN (Print)9781118291399
Publication statusPublished - 2012
EventThe Minerals, Metals & Materials Society Annual Meeting and Exhibition 2012 - Orlando, United States of America
Duration: 11 Mar 201215 Mar 2012
Conference number: 141st


ConferenceThe Minerals, Metals & Materials Society Annual Meeting and Exhibition 2012
Abbreviated titleTMS Annual 2012
Country/TerritoryUnited States of America
Internet address


  • 6xxx
  • Al-Mg-Si alloys
  • Grain refinement
  • Hot tearing
  • Launder

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