Preparation and properties of water-soluble ceramic core for light alloy investment casting

Ke, Rui; Dong, Yingsheng

doi:10.1016/j.mtcomm.2020.101918

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…At present, domestic and foreign methods for metal melt purification mainly include the purging method, filter purification method, and refiner purification method [ 6 ], and have been applied in production, but there are still certain drawbacks. The purging method is mainly used for gas removal, and the efficiency of removing non-metallic inclusions is low [ 7 , 8 ]. A foam ceramic filter purification method can effectively remove non-metallic inclusions, but a skeleton material with a certain impact resistance and suitable branch density must be selected [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Bending Vibration-Assisted Purification Experimental Study of 7085 Aluminum Alloy Melt

Chen

Liao

et al. 2022

Materials

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Aiming at the problem that melt inclusions in the casting process of 7085 aluminum alloy seriously affect the ingot quality, this study introduces ultrasonic bending vibration into the melt of the launder in the semi-continuous casting process of 7085 aluminum alloy and investigates the online purification effect of ultrasonic bending vibration on the melt of 7085 aluminum alloy through a metallographic analysis, SEM analysis, and EDS energy spectrum analysis. The results show that, under the action of the ultrasonic, the inclusions in the aluminum melt are transformed from a large number of elongated large inclusions with a size of more than 50 μm, and granular inclusions with a size of about 5–15 μm, into a small amount of smaller than 30 μm point-like small inclusions. In addition, the average area ratio of inclusions in the melted sample was reduced from 3.835 (±0.05)% to 0.458 (±0.05)%, and the residual refining agent in the aluminum melt was effectively removed. It was also found that under the action of ultrasonic bending vibration, the tiny inclusions in the melt aggregate with each other, and interact with the residual refining agent in the melt to further grow, and are attached to the inner surface of the ceramic cavity channel to be removed.

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Section: Introductionmentioning

confidence: 99%

Ultrasonic Bending Vibration-Assisted Purification Experimental Study of 7085 Aluminum Alloy Melt

Chen

Liao

et al. 2022

Materials

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“…However, in order to further pursue the structural rationality and lightweight of the key parts, the light alloy die castings tend to be integrated and complicated, resulting in more complex internal cavity channels inside the castings, which put forwards higher requirements for the core materials used to form complex hollow structure castings [4][5][6]. Normally, the sand cores cannot meet the conditions of industrial applications due to their lower strength and poor collapsibility, while the ceramic cores have poor collapsibility in spite of sufficient strength [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

3D printing of high-strength water-soluble salt cores via material extrusion

Gong

Liu

Chen

et al. 2021

Int J Adv Manuf Technol

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Core materials with high strength and excellent collapsibility are important for the manufacture of hollow composite structure castings. In this work, a novel technology to fabricate water-soluble Na 2 SO 4 -NaCl-based salt cores with high strength and low cost by material extrusion (ME) was reported. The water-soluble Na 2 SO 4 and NaCl powders were used as the matrix materials, and the bauxite powder was used as the reinforcing material. The effects of bauxite powder content and liquid phase sintering parameters on the properties of the salt cores were studied. The results show that the salt-based slurry exhibits shear thinning property within the studied bauxite powder contents. When the content of bauxite powder was 20 wt.% and the sintering was at 630 ℃/30 min, the obtained salt cores show an optimal comprehensive performance, with the bending strength, linear shrinkage, water solubility rate, and moisture rate of 24.43 MPa, 6.3%, 207.6 (g/min•m 2 ), and 0.29%, respectively. The complex water-soluble salt core samples prepared under optimal parameters display high-strength and well-shaped morphology.

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Effect of pH and Ratio of Alumina Sol on Properties of 3D Printed Silica Ceramics

Huang,

Li,

Colombo

2024

Silicon

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Preparation and properties of water-soluble ceramic core for light alloy investment casting

Cited by 5 publications

References 6 publications

Ultrasonic Bending Vibration-Assisted Purification Experimental Study of 7085 Aluminum Alloy Melt

Ultrasonic Bending Vibration-Assisted Purification Experimental Study of 7085 Aluminum Alloy Melt

3D printing of high-strength water-soluble salt cores via material extrusion

Effect of pH and Ratio of Alumina Sol on Properties of 3D Printed Silica Ceramics

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