Journal article
Counter-Gravity Sand Casting of Steel with Pressurization During Solidification
International journal of metalcasting, Vol.12(3), pp.596-606
12/12/2017
DOI: 10.1007/s40962-017-0200-5
Abstract
Counter-gravity filling and pressurization during solidification have been separately shown to improve casting quality in sand cast steel. Studies and industry practice show that counter-gravity filling increases the yield and reduces reoxidation inclusions. Other studies show pressurization during solidification has the potential to increase the feeding effectivity of risers, which leads to a reduction in centerline shrinkage. In the present study, a method for sand casting steel is developed that combines both practices. Casting simulations are used to determine key events during the process. Counter-gravity filling of a sand mold with liquid steel is performed by linearly decreasing pressure to a value of 0.053 MPa and holding this pressure for 40 s. After the vacuum pressure is released, the entire system is pressurized to a maximum pressure of 0.35 MPa, 220 s after the start of the filling process. The casting method is applied to cylindrical bar castings. Radiographic and dye penetrant inspection of the bars shows no detectable centerline porosity forms when the casting system is pressurized, unlike the gravity-poured control castings.
Details
- Title: Subtitle
- Counter-Gravity Sand Casting of Steel with Pressurization During Solidification
- Creators
- Lucas Archer - University of IowaRichard A Hardin - University of IowaChristoph Beckermann - University of Iowa
- Resource Type
- Journal article
- Publication Details
- International journal of metalcasting, Vol.12(3), pp.596-606
- Publisher
- Springer International Publishing
- DOI
- 10.1007/s40962-017-0200-5
- ISSN
- 1939-5981
- eISSN
- 2163-3193
- Grant note
- DE-EE006428 / U.S. Department of Energy (http://dx.doi.org/10.13039/100000015)
- Language
- English
- Date published
- 12/12/2017
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984196513502771
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