Effects of Gating System Design on Tensile Properties of Cast Aluminium 6063 Alloy

Oyetunji, Akinlabi; Ayodele, A. O.

doi:10.12776/ams.v21i2.567

Cited by 7 publications

(8 citation statements)

References 12 publications

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“…The centrifugal force is influenced by the rotational speed, radius, metal density [1], and gating system [3]. The non-pressurized system, with reduced turbulence and the increasing cross-sectional area towards the mold cavity, can increase the mechanical properties [4]. Moreover, to improve the average bending strength can be done by enlarging the vortex runner diameter in the gating system [5].…”

Section: Introductionmentioning

confidence: 99%

Characteristic of Interface Bimetal Aluminum-Copper for Bimetal Bushing Produced by Centrifugal Casting

Santoso

Suharnadi

Prayoga

et al. 2021

Acta Metall Slovaca

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Bimetallic is a type of metal composite that combines two metals that form a metallurgical bond. The manufacture of bimetallic bushings by centrifugal casting has not been developed much. Recently, there is no recommendation yet for optimum temperature and speed of rotation to produce bimetallic bushings. The research was conducted to determine the rotation of the mold in centrifugal casting so as to produce a well-integrated interface. The materials used are aluminum and copper. Aluminum was melted at 750 °C, while copper was melted at 1200 °C. Molten metal was pouring alternately. First, aluminum was poured into the mold, and then after the aluminum temperature reached 400º C, copper was poured into the mold to form a bushing aluminum-copper bimetallic. The molten metal was poured into a rotating sand mold with a constant filling speed of about 0.15 kg s-1. The variations of the rotational speed of the mold were 250, 300, and 350 rpm. The result shows that the interface’s width increases as the mold rotation increases during the pouring process. Interface hardness and wear are increased compared to the base metal. Hence, centrifugal casting with 350 rpm is recommended for aluminum-copper bimetal bushing applications.

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Section: Introductionmentioning

confidence: 99%

Characteristic of Interface Bimetal Aluminum-Copper for Bimetal Bushing Produced by Centrifugal Casting

Santoso

Suharnadi

Prayoga

et al. 2021

Acta Metall Slovaca

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“…On the other hand, it can reduce the mechanical properties of the product. In the gating system, decreasing cross-sectional area towards the mold cavity increased the pressure that will affect the tensile strength [16]. On the contrary, increasing cross-sectional area towards the mold cavity reduced turbulence [16].…”

Section: Introductionmentioning

confidence: 99%

“…In the gating system, decreasing cross-sectional area towards the mold cavity increased the pressure that will affect the tensile strength [16]. On the contrary, increasing cross-sectional area towards the mold cavity reduced turbulence [16]. Research of gate shape and direction on centrifugal casting is still needed to make the best design so that liquid metal can enter the mold cavity with higher pressure and low turbulence.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gating Shape and Direction During Centrifugal Casting of Artificial Lumbar Disc Model of Cp-Ti

Setyana

Mahardika

Sutiyoko³

et al. 2019

Acta Metall Slovaca

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<p class="AMSmaintext">Shape and direction of gate in centrifugal casting affected the microstructures and defects in castings. The purpose of this research was to determine the effects of gate shape and direction in centrifugal casting toward on porosity, density, roughness, and microstructures on the artificial lumbar disc model. The main shapes of the gate were circular and rectangular cross-section. The circular cross-section gate shape was used for two different directions of artificial lumbar discs; vertical, and horizontal. Furthermore, the rectangular cross-section gate shape consisted of three different directions; oblique clockwise, oblique counter-clockwise and perpendicular towards the mold. The rotational mold was conducted at a speed of 60 rpm. The results showed that the rectangular cross-section gate shape with the oblique direction same with the rotation of the mold produced artificial lumbar disc model that had the smallest porosity area among the other directions. It was the best shape and direction of the gate among the others which had the smallest porosity area (0,68%), highest density (4,517 g/cm<sup>3</sup>), and smoothest roughness (8,76 µm). In the sub-surface, the microstructure of α-case was formed. The thickness and hardness of the α-case in this design were 50-100 µm and 760 VHN, respectively. Hence, the rectangular cross-section gate shape with the oblique direction same with the rotation of the mold was appropriate to be applied in the manufacture of an artificial lumbar disc model.</p>

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“…Runners are to be designed such that it fills quickly and the velocity of the metal reduces steadily from the runner entrance to the ingate. It has been shown that castings produced using pressurized system is inferior to those produced by unpressurised system [3].…”

Section: Spruesmentioning

confidence: 99%

Untitled

2020

ETRJ

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A recent study conducted by the authors, recording on site observations and grading responses to questionnaires by the 1 to 5 according to the Likert scale indicates that the gating practice in the foundries of research institutions and tertiary institutions in Lagos state is far from the best global practice. Some common errors, such as lack of knowledge and application of the critical flow velocity of the molten metal, prevention of flow stoppage across extensive horizontal planes with consequential non uniform liquid front. Lack of knowledge of the best types of pouring basins to use, Lack of knowledge on general filter types and usages among others were identified. This paper provides simple but highly effective solutions that do not warranty the purchase of new facilities. It is important to advance the knowledge of our training institutes especially as they are responsible for the training of our present and future foundry work force. The capability of our foundries is improved by the quality of the work force and this paper is hoped will contribute in no small measure to the capability of our foundries by improving the knowhow of the work force.

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Effects of Gating System Design on Tensile Properties of Cast Aluminium 6063 Alloy

Cited by 7 publications

References 12 publications

Characteristic of Interface Bimetal Aluminum-Copper for Bimetal Bushing Produced by Centrifugal Casting

Characteristic of Interface Bimetal Aluminum-Copper for Bimetal Bushing Produced by Centrifugal Casting

Effect of Gating Shape and Direction During Centrifugal Casting of Artificial Lumbar Disc Model of Cp-Ti

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