Improving the Mechanical Properties of Salt Core through Reinforcing Fibers

다국어 초록 (Multilingual Abstract)

Salt cores have attracted considerable attention for their application to the casting process of electric vehicle parts as a solution to ecological issues. However, the salt core still has low mechanical strength for use in high-pressure die casting. In this study, we investigated the improvements in the bending strength of KCl-based salt cores resulting from the use of reinforcing materials. KCl and Na2CO3 powders were used as matrix materials, and glass fiber and carbon fiber were used as reinforcing materials. The effects of carbon fiber and glass fiber contents on the bending strength properties were investigated. Here, we obtained a new fiber-reinforced salt core composition with improved bending strength for high-pressure die casting by adding a relatively small amount of glass fiber (0.3 wt%). The reinforced salt core indicates the improved properties, including a bending strength of 49.3 Mpa, linear shrinkage of 1.5%, water solubility rate of 16.25 g/min·m2 in distilled water, and hygroscopic rate of 0.058%.

참고문헌 (Reference)

1 M. Lagler, "Use of Simulation to predict the Viabilirt of Salt Cores in the HPDC Process-Shot Curve as a Decisive Criterion" 57 (57): 16-17, 2013

2 R. Huang, "Study on the Composition and Properties of Salt Cores for Zinc Alloy Die Casting" 11 : 440-447, 2017

3 J. Yaokawa, "Strength of Salt Core Composed of Alkali Carbonate and Alkali Chloride Mixtures Made by Casting Technique" 48 (48): 1034-1041, 2007

4 P. P. Zhou, "Optimization of the injection molding process for development of high performance calcium oxide -based ceramic cores" 5 (5): 025208-, 2018

5 J. Weise, "New Core Technology for Light Metal Casting" 21 (21): 1800608-, 2019

6 S. O. Akinwamide, "Microstructural evolution, mechanical and nanoindentation studies of stir cast binary and ternary aluminium based composites" 850 : 156586(1)-156586(3), 2021

7 J. Bedmar, "Manufacturing of Aluminum Matrix Composites Reinforced with Carbon Fiber Fabrics by High Pressure Die Casting" 15 (15): 3400(1)-3400(18), 2022

8 S. Tu, "Fabrication and characterization of high-strength water-soluble composite salt core for zinc alloy die castings" 95 : 505-512, 2018

9 X. Gong, "Effects of glass fiber size and content on microstructures and properties of KNO3-based water-soluble salt core for high pressure die casting" 15 : 520-529, 2021

10 H. Khandelwal, "Effect of Binder Composition on the Shrinkage of Chemically Bonded Sand Cores" 30 (30): 1465-1470, 2015

11 J. Beòo, "Development of composite salt cores for foundry applications" 49 (49): 619-623, 2015

12 B. Fuchs, "Core Viability Simulation for Salt Core Technology in High-Pressure Die Casting" 7 : 39-45, 2013

13 F. Liu, "Comparative study on performance and microstructure of composite water-soluble salt core material for manufacturing hollow zinc alloy castings" 252 : 123257-, 2020

14 S. O. Akinwamide, "Characterization of microstructure, mechanical properties and corrosion response of aluminium-based composites fabricated via casting—a review" 109 : 975-991, 2020

15 M. Gromada, "Ceramic cores for turbine blades via injection moulding" 220 : 107-112, 2015

16 J. Yaokawa, "Castability and Strength of Potassium Chloride-Ceramic Composite Salt Cores" 76 (76): 823-829, 2004

17 P. Jelinek, "Advances in Technology of Soluble cores for Die Castings" 15 : 29-34, 2015