Critical Solid Fraction Point Analysis: Case Study on Cement Mill Machine Diaphragm

Mochamad Achyarsyah, Poppy Puspitasari

Abstract


During the solidification process, metal liquids turn into solid geometry units including the riser and gating system. The disruption in the liquid flow often causes shrinkage in the object. Critical Solid Fraction Point is a critical point where the continuous liquid supply turned solid and unable to pour to some sections. Simulation software can predict the critical solid fraction time of an object and the liquid supply behavior. The simulation helps the designer in the casting design. The application of low steel alloys in the cement industry, e.g., the Diaphragm, needs development to minimize the shrinkage. This research aimed to analyze the critical solid fraction point in the diaphragm steel casting products. The primary objective of this research was to predict the critical solid fraction point during solidification, started from the longest time in the riser/feeder using SOLIDCast 8.1.1 casting software and provided improvement recommendation to minimize the shrinkage.

Keywords


Critical fraction solid time, diafragm, shrinkage

Full Text:

PDF

References


M. Holtzer, “The Mold/Casting Interface Phenomena,” in Microstructure and Properties of Ductile Iron and Compacted Graphite Iron Castings: The Effects of Mold Sand/Metal Interface Phenomena, New York: Springer International Publishing, pp. 77–108. 2015.

T. Takahashi, “Solidification and casting.,” Bull. Japan Inst. Met., vol. 26(7), pp. 687-691, 2011.

A. A. Gaware dan A. K. Mahalle, “A Review on Investigation of Casting Defects with Simulation,” Int. J. Innov. Eng. Sci., vol. 2(5), pp. 15-20, 2017.

B. Ravi, “Casting Simulation – Best Practices,” Trans. of 58th IFC, 2010.

R. W. Lewis dan K. Ravindran, “Finite element simulation of metal casting,” Int. J. Numer. Methods Eng., vol. 47(1‐3), pp. 29-59, 2000.

J. Campbell, Complete Casting Handbook: Metal Casting Processes, Metallurgy, Techniques and Design: Second Edition. Oxford: Butterworth-Heinemann. 2015.

U. A. Dabade dan R. C. Bhedasgaonkar, “Casting defect analysis using design of experiments (DoE) and computer aided casting simulation technique,” in Procedia CIRP, 2013.

S. S. M. Nazirudeen dan B. Chokkalingam, “Analysis of Casting Defect Through Defect Diagnosis Study Approach,” J. Eng. Ann. Fac. Eng. Hunedoara, vol. 2, pp. 209–212, 2009.

K. D. Carlson, S. Qu, dan C. Beckermann, “Feeding of high-nickel alloy castings,” Metall. Mater. Trans. B, vol. 36(6), pp. 843–856, 2005.

R. Wlodawer. Directional Solidification of Steel Castings. New York:Pergamon. 2016.

P. Beeley, “Casting design,” in Foundry Technology, Oxford: Butterworth-Heinemann 2007.

R. Gallo dan D. Neff, “ASM Handbook: Vol 15 - Casting,” ASM Handbook Volume 15 - Casting. 2008.

G. Menges, W. Michaeli, dan P. Mohren, “Shrinkage,” in How to Make Injection Molds, 2012.




DOI: http://dx.doi.org/10.17977/um016v3i22019p081

Refbacks

  • There are currently no refbacks.


Copyright (c) 2019 Journal of Mechanical Engineering Science and Technology (JMEST)

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

View My Stats