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Analisa Uji Kekerasan dan Uji Tarik Material AISI P20 Mod. Hasil Perlakukan Hardening dan Tempering Kusnowo, Roni
Jurnal Teknologi Terapan Vol 1, No 1 (2015): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v1i1.30

Penelitian ini bertujuan untuk menganalisis uji kekerasan dan uji tarik pada material AISI P20 Mod. setelah melalui proses hardening dan tempering pada suhu yang berbeda-beda. Hardening adalah proses perlakuan panas yang diterapkan untuk menghasilkan benda kerja yang keras. Proses tempering bertujuan untuk memperoleh kombinasi antara kekuatan, keuletan dan ketangguhan yang tinggi. Material AISI P20 Mod. sebagai material substitusi impor yang diproduksi melalui proses continuous casting dimana dalam proses pembuatannya memerlukan proses rol (rolling) dan proses tempa (forging). Material ini mempunyai sifat dan karakteristik khusus, diantaranya tahan terhadap temperatur tinggi, tahan terhadap abrasi, dan mempunyai mampu mesin yang baik. Hasil penelitian menunjukkan uji kekerasan pada proses hardening mencapai nilai kekerasan 53,7 HRC. Selanjutnya dilakukan proses tempering pada suhu 200C hasil menunjukkan nilai kekerasan sedikit meningkat menjadi 54 HRC, sedangkan pada temperatur 400C terjadi penurunan nilai kekerasan menjadi 47,4 HRC. Baru setelah dilakukan tempering pada suhu 600C hasil uji kekerasan menunjukkan masuk target kekerasan yang diinginkan yaitu pada 34 HRC. Hasil uji tarik menunjukkan pada kondisi awal benda, hasil uji tarik adalah 655N/mm2. Kekuatan tarik hasil proses hardening sebesar 1244 N/mm2. Setelah dilakukan proses tempering 2000C dihasilkan kekuatan tarik 1515.8 N/mm2. Pada proses tempering 4000C, terjadi penurunan nilai kekuatan tarik menjadi 1397.9 N/mm2. Selanjutnya pada proses tempering 6000C nilai kekuatan tarik menjadi 1077.7 N/mm2, mendekati target kekuatan tarik yaitu 1020 N/mm2.

Pengaruh Kecepatan Putar Terhadap Hasil Coran pada Metode Pengecoran Sentrifugal dalam Pembuatan Produk Pisau Pakan Ternak dengan Material Ni-Hard1 Kusnowo, Roni; Hanaldi, Kus
Manutech : Jurnal Teknologi Manufaktur Vol. 11 No. 01 (2019): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Animal feed knife is a tool that serves to cut and chop animal feed consisting of grass as the main ingredient with additives such as bran, herbs, centrate, cassava, tofu pulp and others. Therefore, as a cutting tool must have the properties of friction resistance, impact resistance, and have good sharpness, so that the material chosen is Ni-Hard 1. The use of centrifugal casting method was chosen because it has the advantage of being able to make castings with relatively thin thickness this is due to the influence of the centrifugal force on the distribution of metal liquids throughout the cavity in the mold. Case study in this study is the use of centrifugal casting methods as an alternative to gravity casting methods to overcome defects of misruns. This research was conducted to investigate the effect of speed on the formation of castings products. The method that was carried out began with a literature study on centrifugal casting, and continued by determining the material, the temperature of the cast is in the range 1250ºC - 1300ºC, and the type of mold. The next step is to do work drawings, pattern making, mold making, casting processes, fettling processes, and analysis. With variations in speed of 200 rpm, 300 rpm and 400 rpm, it can be seen the optimal speed for making this product. The results of this study obtained optimal speed at a speed of 300 rpm to make good quality of animal feed knife products.

The Effect of Rotate Speed on Establishment of Livestock Feed Product with Ni-Hard1 Material Using Centifugal Casting Method Roni Kusnowo
International Conference on Industrial Revolution for Polytechnic Education Vol. 1 No. 1 (2019): International Conference on Industrial Revolution for Polytechnic Education
Publisher : PolinemaPress

Show Abstract | Download Original | Original Source | Check in Google Scholar

Animal feed knife is a tool that serves to cut and chop animal feed consisting of grass as the main ingredient with additives such as bran, herbs, centrate, cassava, tofu pulp and others. Therefore, as a cutting tool must have the properties of friction resistance, impact resistance, and have good sharpness, so that the material chosen is Ni-Hard 1. The use of centrifugal casting method was chosen because it has the advantage of being able to make castings with relatively thin thickness this is due to the influence of the centrifugal force on the distribution of metal liquids throughout the cavity in the mold. Case study in this study is the use of centrifugal casting methods as an alternative to gravity casting methods to overcome defects of misruns. This research was conducted to investigate the effect of speed on the formation of castings products. The method that was carried out began with a literature study on casting centrifugal casting. Continued by determining the material, the temperature of the cast is in the range 1250ºC - 1300ºC, and the type of mold. The next step is to do work drawings, pattern making, mold making, casting processes, fettling processes, and analysis. With variations in speed of 200 rpm, 300 rpm and 400 rpm, it can be seen the optimal speed for making this feed product. The results of this study obtained optimal speed at a speed of 300 rpm to make animal feed knife products.

Perancangan Coran Baja Cor SKD6 Menggunakan Simulasi Perangkat Lunak Pada Produk Side Core SD25R Kusnowo, Roni; Ery Hidayat
Manutech : Jurnal Teknologi Manufaktur Vol. 13 No. 01 (2021): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

This study aims to produce a casting design for SD25R sidecore products with SKD6 material to be able to produce sound casting products or castings products that are free from defects with a scale of 1: 1. The sidecore SD25R is a casting product made for molded components for car wheels. This component is an imported product and in Indonesia no one has succeeded in supplying the needs of this component. The methodology used is simulation method, which is a method used to predict the defects of a cast material by using the SOLIDcast 8.2.5. Starting with the calculation of the channel system and the addition and design simulation using software as a tool in modeling the process metal casting before the actual metal casting process is carried out to reduce the risk of failure. In addition, this simulation can predict freezing temperature, cooling speed, the hottest area, and the porosity that occurs will be seen from this simulation, so it will reduce the trial and error process in the field. Based on the calculation of the gating system, the dimensions of the runner are 11x22x33 mm, the gates is 12x48 mm, the diameters of downsprue is 33 mm, and uses 2 top risers with a diameter of 150 mm, with a casting yield of 59.5%. The simulation results with this software showed that the gating system design from the above calculations and the use of the top riser is more effective to produce a better product or sound casting product.

The Effect of Aggregate Size and Resin Fraction on The Damping Capacity of Epoxy-Marble Composite Hermana, Gita Novian; Kusnowo, Roni; Purwadi, Wiwik; Pradesar, Yusuf
Jurnal Bahan Alam Terbarukan Vol 10, No 2 (2021): December 2021 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v10i2.34070

The production of material with high precission and high complexity has been rapidly increasing in several industrial sector. The high accuracy is difficult to achieve during manufacturing due to vibration factors that influenced the final product of material. In this study the relationship between particle size and percentage of marble aggregate with epoxy resin on damping capacity was studied systematically. The Composite materials were fabricated by using conventional casting technique with 10, 25, and 50% volume fraction of resin and two marble aggregate groups with 0.5-0.7 mm and 1.4-2.0 mm in particle size. The casting process was using multilayer pouring technologies to prevent void formation. 10% epoxy resin-fine marble aggregate has very good vibration result with 0.003 mm in displacement, 0.23 mm/s in velocity, and 0.2 m/s2 in acceleration. The 10% epoxy resin-fine marble aggregate also has the best damping ratio among the composite due to the large specific area and porosity inside the marble material with value of 0.5%. The multilayer pour techniques for composite has been successfully adapted in this study to minimalize void/bubble formation inside and upperside of epoxy resin during the fabrication of composite. The secondary electron image of composite was observed that the marble aggregates and epoxy resin bonding are very good and no crack or void formation in the interface of the marble aggregate and epoxy resin.

Pengaruh Waktu dan Temperatur terhadap Sifat Mekanik Pasir dan Kualitas Produk Cor dengan Metode Shell Moulding Roni Kusnowo; Sophiadi Gunara; Syani Ghozali Fauzan
Jurnal Energi dan Teknologi Manufaktur Vol 2 No 01 (2019)
Publisher : Polinema Press, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jetm.v2i01.30

The shell molding method is one of the processes of coating sand grains in a thermo setting resin which preserves heat on the model. To produce castings products that have good quality and produce maximum mechanical properties from the shell molding process, it must be known that the right procedure stages such as the right heating time. But currently there is no technical procedure that is found that is the right temperature and heating time for making shell molding to produce good surface quality of castings. This study aims to determine the effect of temperatures and heating time on the mechanical properties of RCS (resin coated sand) and the quality of the object castings. A series of testing methods, carried out by heating the RCS on the sample mold bending and hardness test. Testing the mechanical properties of sand includes bending test and hardness test. The time variations used in sand heating are 1 minute, 2 minutes and 3 minutes with temperature variations of 1800C, 2000C, 2200C, 2400C, 2600C and 2800C. After knowing the results of the most optimal temperature and time from testing mechanical properties then making molds using the shell molding method, the molding material used is aluminum. The mold formed from the shell molding method is then cast using NiHard1 material with a temperature of 14000C. The results of the castings will be identified visually and compared with the mechanical properties of the sand obtained. The results of this study obtained the highest value on the graph of the results of mechanical properties testing at a temperature of 2200C with a heating time of 2 minutes. The results of castings best viewed in terms of visual obtained by heating time for 2 minutes and 3 minutes at a temperature of 2200C. This showed that the heating time for 2 minutes and 3 minutes at the temperature of 2200C results in the highest mechanical properties and the best quality of castings for shell molding method.

Analisa Uji Kekerasan dan Uji Tarik Material AISI P20 Mod. Hasil Perlakukan Hardening dan Tempering Roni Kusnowo
Jurnal Teknologi Terapan Vol 1, No 1 (2015): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Penelitian ini bertujuan untuk menganalisis uji kekerasan dan uji tarik pada material AISI P20 Mod. setelah melalui proses hardening dan tempering pada suhu yang berbeda-beda. Hardening adalah proses perlakuan panas yang diterapkan untuk menghasilkan benda kerja yang keras. Proses tempering bertujuan untuk memperoleh kombinasi antara kekuatan, keuletan dan ketangguhan yang tinggi. Material AISI P20 Mod. sebagai material substitusi impor yang diproduksi melalui proses continuous casting dimana dalam proses pembuatannya memerlukan proses rol (rolling) dan proses tempa (forging). Material ini mempunyai sifat dan karakteristik khusus, diantaranya tahan terhadap temperatur tinggi, tahan terhadap abrasi, dan mempunyai mampu mesin yang baik. Hasil penelitian menunjukkan uji kekerasan pada proses hardening mencapai nilai kekerasan 53,7 HRC. Selanjutnya dilakukan proses tempering pada suhu 200C hasil menunjukkan nilai kekerasan sedikit meningkat menjadi 54 HRC, sedangkan pada temperatur 400C terjadi penurunan nilai kekerasan menjadi 47,4 HRC. Baru setelah dilakukan tempering pada suhu 600C hasil uji kekerasan menunjukkan masuk target kekerasan yang diinginkan yaitu pada 34 HRC. Hasil uji tarik menunjukkan pada kondisi awal benda, hasil uji tarik adalah 655N/mm2. Kekuatan tarik hasil proses hardening sebesar 1244 N/mm2. Setelah dilakukan proses tempering 2000C dihasilkan kekuatan tarik 1515.8 N/mm2. Pada proses tempering 4000C, terjadi penurunan nilai kekuatan tarik menjadi 1397.9 N/mm2. Selanjutnya pada proses tempering 6000C nilai kekuatan tarik menjadi 1077.7 N/mm2, mendekati target kekuatan tarik yaitu 1020 N/mm2.

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

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

PENGEMBANGAN PRODUK CASING ALAT KESEHATAN PEMANTAUAN INFUS PINTAR (MIFUS) DENGAN METODE RAPID TOOLING Media, Riona Ihsan; Kusnowo, Roni; Hendrawan, Yogi Muldani; Musa, Hafez Trimukti Ali
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1479

MiFUS® is a tool that can display the patient's infusion condition so that nurses can monitor patients one by one in a short time simultaneously. Several nurses were involved in this study to provide input to the casing. Product design is done at the beginning to know the initial casing design. Next, the manufacture of casing molds is carried out using a 3D printing machine. The results of the 3D printer are used as a Master Mold for the implementation of Rapid Tooling method with Epoxy material. The solution of product development is catalyst ratio analysis on polyester resin to obtain the optimal ratio of properties including shrinkage and strength of the material to withstand mechanical loads. Validation of shrinkage is carried out using 3D Scanning technology to determine the deviation of dimensions in the casing made against CAD data. Meanwhile, to obtain the strength parameters of the material to withstand mechanical loads, tensile testing is carried out. The results of this study are the contribution of design parameters, namely the amount of shrinkage that occurs and the strength parameters of the material to withstand mechanical loads. The Data and information are presented in the form of product prototypes and user analysis feasibility studies.

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

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

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