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Nadi, M. Rizki Gorbyandi
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Mechanical Engineering

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INVESTIGASI MIKROSTRUKTUR DAN KEKERASAN MATERIAL GEARBOX TRAKTOR TANGAN DENGAN METODE PENGECORAN LOGAM Kusnowo, Roni; Nadi, M. Rizki Gorbyandi; Hermana, Gita Novian; Siswanto , Ari; Nahrowi , Muhammad; Ruskandi , Cecep; Gemilang , Yun
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1420

Abstract

Tractor gearboxes have become a crucial mechanization tool in the agricultural industry in Indonesia. However, in practice, many of the hand tractor gearboxes available are still imported. Therefore, research is needed to produce hand tractor gearboxes to support domestic industry self-sufficiency. The gray cast iron hand tractor gearbox is produced using a metal casting process with sand molds. The material resulting from this metal casting process has a composition of 3.249 wt.% C, 1.757 wt.% Si, 0.6 wt.% Mn for the first batch, 3.153 wt.% C, 1.568 wt.% Si, 0.624 wt.% Mn for the second batch, and 3.105 wt.% C, 1.932 wt.% Si, 0.560 wt.% Mn for the third batch. Based on microstructure analysis, the gray cast iron consists of 5% ferrite phase, 95% pearlite, and flake graphite type A with a size of 5. Brinell hardness testing resulted in hardness values of 152, 155, and 164 BHN for the gray iron for the first, second, and third batches respectively. The gray cast iron has a yield strength of 163, 172, and 176 MPa for each batch respectively. Meanwhile, the tensile strength of the gray cast iron from each batch is 285, 311, and 326 MPa
PENGARUH VARIASI TEMPERATUR FURNANCE BRAZING TERHADAP SIFAT MEKANIK DALAM PEMBUATAN GRINDING ROLL MATERIAL FCD 500 DAN NI-HARD1 Siswanto, Ari; Hanaldi , Kus; Purwadi , Wiwik; Nadi, M. Rizki Gorbyandi
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1639

Abstract

This research was conducted on nodular cast iron FCD 500 and white cast iron Ni-Hard1 in the manufacturing of grinding rolls. These rolls were joined together using the furnace brazing method, with CuZn 35 filler metal placed between the two parent metals. The pressure applied in this experiment was 26,000 N using a pressure aid. The assembled parts of the grinding rolls were heated in a muffle furnace with temperature variations of 900, 950, and 1000 °C, with a holding time of 120 minutes. The results of the furnace brazing process revealed that the grinding roll sample achieved the highest shear strength at a temperature of 900 °C, with a shear strength of 6.52 MPa. The observed low shear strength is due to the penetration bonding between the metals. This was confirmed by the line analysis test, which indicated no diffusion process occurring between the metals. As the holding temperature of the brazing furnace increased, the shear strength decreased, primarily due to the melting of the CuZn 35 metal at temperatures above 900 °C, resulting in micro porosity. During the furnace brazing process, changes were observed in the microstructure of the FCD 500 parent metal. There was an increase in the amount of pearlite fraction, which in turn increased the hardness value. Additionally, the microstructure of Ni-Hard1 changed from austenite to martensite, leading to an increase in the hardness value.
INVESTIGASI MIKROSTRUKTUR DAN KEKERASAN MATERIAL GEARBOX TRAKTOR TANGAN DENGAN METODE PENGECORAN LOGAM Kusnowo, Roni; Nadi, M. Rizki Gorbyandi; Hermana, Gita Novian; Siswanto , Ari; Nahrowi , Muhammad; Ruskandi , Cecep; Gemilang , Yun
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1420

Abstract

Tractor gearboxes have become a crucial mechanization tool in the agricultural industry in Indonesia. However, in practice, many of the hand tractor gearboxes available are still imported. Therefore, research is needed to produce hand tractor gearboxes to support domestic industry self-sufficiency. The gray cast iron hand tractor gearbox is produced using a metal casting process with sand molds. The material resulting from this metal casting process has a composition of 3.249 wt.% C, 1.757 wt.% Si, 0.6 wt.% Mn for the first batch, 3.153 wt.% C, 1.568 wt.% Si, 0.624 wt.% Mn for the second batch, and 3.105 wt.% C, 1.932 wt.% Si, 0.560 wt.% Mn for the third batch. Based on microstructure analysis, the gray cast iron consists of 5% ferrite phase, 95% pearlite, and flake graphite type A with a size of 5. Brinell hardness testing resulted in hardness values of 152, 155, and 164 BHN for the gray iron for the first, second, and third batches respectively. The gray cast iron has a yield strength of 163, 172, and 176 MPa for each batch respectively. Meanwhile, the tensile strength of the gray cast iron from each batch is 285, 311, and 326 MPa
PENGARUH VARIASI TEMPERATUR FURNANCE BRAZING TERHADAP SIFAT MEKANIK DALAM PEMBUATAN GRINDING ROLL MATERIAL FCD 500 DAN NI-HARD1 Siswanto, Ari; Hanaldi , Kus; Purwadi , Wiwik; Nadi, M. Rizki Gorbyandi
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1639

Abstract

This research was conducted on nodular cast iron FCD 500 and white cast iron Ni-Hard1 in the manufacturing of grinding rolls. These rolls were joined together using the furnace brazing method, with CuZn 35 filler metal placed between the two parent metals. The pressure applied in this experiment was 26,000 N using a pressure aid. The assembled parts of the grinding rolls were heated in a muffle furnace with temperature variations of 900, 950, and 1000 °C, with a holding time of 120 minutes. The results of the furnace brazing process revealed that the grinding roll sample achieved the highest shear strength at a temperature of 900 °C, with a shear strength of 6.52 MPa. The observed low shear strength is due to the penetration bonding between the metals. This was confirmed by the line analysis test, which indicated no diffusion process occurring between the metals. As the holding temperature of the brazing furnace increased, the shear strength decreased, primarily due to the melting of the CuZn 35 metal at temperatures above 900 °C, resulting in micro porosity. During the furnace brazing process, changes were observed in the microstructure of the FCD 500 parent metal. There was an increase in the amount of pearlite fraction, which in turn increased the hardness value. Additionally, the microstructure of Ni-Hard1 changed from austenite to martensite, leading to an increase in the hardness value.
Co-Authors Ari Siswanto, Ari Gemilang , Yun Gita Novian Hermana Hanaldi , Kus Kusnowo, Roni Nahrowi , Muhammad Purwadi , Wiwik Ruskandi , Cecep Siswanto , Ari