Articles
  • Property analysis of gypsum bleed pump impeller fabricated by a modified sand-casting method

  • Eun-Hee Kima, Guen-Ho Choa, Hye-Yeong Parka, Hyun-Hee Choia and Yeon-Gil Junga,b,*

  • aSchool of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 641-773, Republic of Korea
    bDepartment of Materials Convergence and System Engineering, Changwon National University, 20 Changwondaehak-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do 51140, Republic of Korea

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A gypsum bleed pump impeller, which had been produced by a precision-casting process, was made using a modified sand-casting process by applying an inorganic binder system. The glass phase generated from the inorganic binder allowed the sand mold and core to withstand the casting temperature. The casting product, having a sound surface roughness and a stable dimensional property, was made with a highly fluid molten metal. The sand mold with the inorganic binder was completely collapsed after casting, and the core was also eluted 100% in an aqueous sodium hydroxide solution. In addition, the cast pump impeller had abrasion and corrosion resistance similar to the OEM (original equipment manufacturer) product made using conventional precision-casting. In addition, the magnetic particle test and the radiographic test were conducted to check the external and internal defects of the impeller.


Keywords: Inorganic precursor, Sand-casting process, Gypsum bleed pump, Abrasion, Corrosion resistance

This Article

  • 2021; 22(1): 1-7

    Published on Feb 28, 2021

  • 10.36410/jcpr.2021.22.1.1
  • Received on Jan 6, 2020
  • Revised on Mar 31, 2020
  • Accepted on Aug 14, 2020

Correspondence to

  • Yeon-Gil Jung

  • aSchool of Materials Science and Engineering, Changwon National University, Changwon, Gyeongnam 641-773, Republic of Korea
    bDepartment of Materials Convergence and System Engineering, Changwon National University, 20 Changwondaehak-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do 51140, Republic of Korea
    Tel : +82-55-213-3712 Fax: +82-55-262-6486

  • E-mail: jungyg@changwon.ac.kr