The Effect of Heat Treatment and Pressing at 400 °c With Coconut Shell Charcoal Media on the Hardness, Microstructure, and Density of Al-Si Alloys

Masyrukan, Masyrukan; Darmawan, Agung Setyo; Hariyanto, Agus; Purboputro, Pramuko Ilmu; Ihwanudin, Hanif Alfian; Pamungkas, Muhammad Ibnu

doi:10.23917/mesin.v23i2.19347

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…Therefore, it is necessary to research the manufacture of permanent molds with FCD because it has hard dan tough properties, has a higher melting point than gray cast iron, and will be easy to machine to produce good products/molds and more precision to reduce the finishing process [18][19][20]. Hardness and toughness are important properties of metals [21][22][23][24][25]. The hardness and toughness of permanent molds with cast iron material are influenced by the percentage of roundness of graphite in the microstructure.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Nodular Graphite on Hardness and Toughness in Permanent Molds Made of Ferro Casting Ductile

Yulianto,

Darmawan,

Anggono

et al. 2024

J. Phys.: Conf. Ser.

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The permanent mold was made of Ferro Casting Ductile as a result of sand casting. Permanent mold is mold that can be used repeatedly. This permanent mold is used to produce tensile test specimens. Tensile test specimens are made of gray cast iron. This study aims to determine and analyze the effect of spheroidal graphite on the hardness and toughness of Ferro Casting Ductile in permanent molds to make tensile test specimens. The casting process starts by making patterns using Styrofoam, making molds with green-sand sand molds, followed by pouring molten cast iron into the molds. The next process is dismantling the castings and machining to get a permanent mold according to the dimensions. Specimens for testing the chemical composition were obtained from the results of castings into spherical dies. Meanwhile, the impact, hardness, and microstructure specimens were taken from the permanent molded product. The results of the chemical composition test showed that Ferro Casting Ductile contained several main elements, namely 92.14 %Fe, 3.681 %C, 3.715 %Si, 0.182 %Mn, 0.050 %Ni, and 0.034 %Mg which affected the percentage of nodular graphite. Nodular graphite will affect the hardness of the permanent mold. Validation was carried out by testing the hardness at 3 different points 167.70 VHN, 162.77 VHN, and 155.77 VHN. Toughness was obtained from the impact test using the Charpy method, the impact values were 0.048 Joule/mm2 0.046 Joule/mm2 0.037 Joule/mm2 on 3 different specimens. From the test results, the specimen has met the FCD 400 standard.

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Section: Introductionmentioning

confidence: 99%

The Effect of Nodular Graphite on Hardness and Toughness in Permanent Molds Made of Ferro Casting Ductile

Yulianto,

Darmawan,

Anggono

et al. 2024

J. Phys.: Conf. Ser.

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“…However, the toughness of nodular cast iron can still be improved by modifying the microstructure. The microstructure can be changed by adding alloying elements or by heat treatment [14][15][16]. One of the most common heat treatments applied to increase the toughness of nodular cast iron is austempering.…”

Section: Introductionmentioning

confidence: 99%

Effect of Austempering Holding Time Variations of 30, 60, and 90 Minutes at 300 °C on The Microstructure and Toughness of Nodular Cast Iron

Darmawan,

Anggono,

Yulianto

et al. 2024

J. Phys.: Conf. Ser.

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The phases of the nodular cast iron matrix are similar to those of steel. Therefore, heat treatment of steel can be applied to nodular cast iron. A potential heat treatment for nodular cast iron is austempering. This study aimed to determine the effect of austempering holding time at 300 °C on the microstructure and toughness of nodular cast iron. The austempering process begins with austenitizing at a temperature of 850 °C for 60 minutes, then the quenching process is carried out in a salt bath until a temperature of 300 °C is held with variations of 30, 60, and 90 minutes, then cooled to room temperature. Metallographic testing was conducted to determine the phase change before and after the austempering process using a Scanning Electron Microscope (SEM). Meanwhile, impact testing was carried out to determine changes in toughness before and after the austempering process. At a holding time of 30 minutes, metallographic testing on the raw material produced a gray coarse pearlite phase, black nodular graphite surrounded by white ferrite. After the austempering process, gray fine pearlite and black nodular graphite appeared. At the holding time of 60 and 90 minutes, the graphite sizes were bigger. Austempering withholding times of 30, 60, and 90 minutes resulted in impact energy of 4.2, 10, and 11 Joule. From the results of the study, it was concluded that an increase in holding time would increase the size of the graphite and the toughness of nodular cast iron.

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“…After the use of Urbach Energy, it was found that the GO/Nd 2 O 3 composite might be used in electronic equipment using 0.050-0.063 eV semiconductor materials. Masyrukan et al [13] heated and pressed an Al-Si alloy using coconut shell charcoal as part of a study examined hardness, density, and microstructure morphology. Heat treatment was found to, on average, increase hardness to 133 VHN.…”

Section: Introductionmentioning

confidence: 99%

Effect of Volume Fraction of Epoxy Matrix Coconut Shell Composite on Tensile and Impact Loads

Hariyanto,

Anggono,

Pratiwi

et al. 2024

The 7th Mechanical Engineering, Science and Technology International Conference

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The Effect of Heat Treatment and Pressing at 400 °c With Coconut Shell Charcoal Media on the Hardness, Microstructure, and Density of Al-Si Alloys

Cited by 5 publications

References 18 publications

The Effect of Nodular Graphite on Hardness and Toughness in Permanent Molds Made of Ferro Casting Ductile

The Effect of Nodular Graphite on Hardness and Toughness in Permanent Molds Made of Ferro Casting Ductile

Effect of Austempering Holding Time Variations of 30, 60, and 90 Minutes at 300 °C on The Microstructure and Toughness of Nodular Cast Iron

Effect of Volume Fraction of Epoxy Matrix Coconut Shell Composite on Tensile and Impact Loads

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