Aditya Bayu Pratama, S. Sugiyanto, Radhian Krisnaputra, B. T. Prayoga, Yosephus Ardean Kurnianto Prayitno, Isworo Djati
The performance of the gutter brooms sweeping system was studied by conducting an experimental sweeping test. The test is carried out by operating a sweeper system to sweep plastic, paper, and leaf waste. The test results show that at a broom rotation speed of 150,6 rpm, the sweeping of plastic obtained a 100% sweeping success rate with the three settings for the height of the broom, while the sweeping of leaf waste obtained a 100% sweeping success rate at the broom position ± 0 mm touching the road surface and the sweeping of paper waste obtained a 100% sweeping success rate at the broom position ± 15 mm pressing the road surface. The comprehensive system of the gutter brooms type of road sweeper vehicle prototype can show sweeping performance with a 100% success rate, although the success rate of the sweeping is uncertain for different sweeping situations.
{"title":"KINERJA SISTEM PENYAPU TIPE GUTTER BROOMS PADA PROTOTIPE KENDARAAN PENYAPU JALAN","authors":"Aditya Bayu Pratama, S. Sugiyanto, Radhian Krisnaputra, B. T. Prayoga, Yosephus Ardean Kurnianto Prayitno, Isworo Djati","doi":"10.21776/jrm.v14i2.1288","DOIUrl":"https://doi.org/10.21776/jrm.v14i2.1288","url":null,"abstract":"The performance of the gutter brooms sweeping system was studied by conducting an experimental sweeping test. The test is carried out by operating a sweeper system to sweep plastic, paper, and leaf waste. The test results show that at a broom rotation speed of 150,6 rpm, the sweeping of plastic obtained a 100% sweeping success rate with the three settings for the height of the broom, while the sweeping of leaf waste obtained a 100% sweeping success rate at the broom position ± 0 mm touching the road surface and the sweeping of paper waste obtained a 100% sweeping success rate at the broom position ± 15 mm pressing the road surface. The comprehensive system of the gutter brooms type of road sweeper vehicle prototype can show sweeping performance with a 100% success rate, although the success rate of the sweeping is uncertain for different sweeping situations.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114340650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anodizing is an electrolytic coating process that converts aluminum into aluminum oxide. The anodizing process is widely used in the manufacturing industry, especially in automotive components. Its utilization has benefits such as resistance to scratches, ease of maintenance, and added decorative value. The purpose of this study was to determine the effect of time variations on the hardness and thickness of the oxide layer in the 6xxx series of aluminum anodizing processes. The variation of time used in the immersion process is 20, 30, and 40 minutes, with an electric current of 2 amps and a voltage of 24 volts. After that, the dyeing and sealing process is carried out. The tests carried out included testing of hardness (Vickers) and the thickness of the oxide layer (coating thickness gauge). The results of the highest hardness test of 112.9 VHN were obtained at a time variation of 40 minutes, with an average layer thickness of 5.07 m. It can be said that the amount of time spent in the anodizing process has an effect on how hard the oxide layer gets and how thick it is on the 6xxx series of aluminum metal.
{"title":"KARAKTERISASI LAPISAN OKSIDA HASIL ANODIZING PADA ALUMINIUM DENGAN VARIABEL WAKTU PENCELUPAN","authors":"Andika Wisnujati, Ferriawan Yudhanto","doi":"10.21776/jrm.v14i2.1309","DOIUrl":"https://doi.org/10.21776/jrm.v14i2.1309","url":null,"abstract":"Anodizing is an electrolytic coating process that converts aluminum into aluminum oxide. The anodizing process is widely used in the manufacturing industry, especially in automotive components. Its utilization has benefits such as resistance to scratches, ease of maintenance, and added decorative value. The purpose of this study was to determine the effect of time variations on the hardness and thickness of the oxide layer in the 6xxx series of aluminum anodizing processes. The variation of time used in the immersion process is 20, 30, and 40 minutes, with an electric current of 2 amps and a voltage of 24 volts. After that, the dyeing and sealing process is carried out. The tests carried out included testing of hardness (Vickers) and the thickness of the oxide layer (coating thickness gauge). The results of the highest hardness test of 112.9 VHN were obtained at a time variation of 40 minutes, with an average layer thickness of 5.07 m. It can be said that the amount of time spent in the anodizing process has an effect on how hard the oxide layer gets and how thick it is on the 6xxx series of aluminum metal. ","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133229586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To improve motorbike performance, simple modifications are often applied using an aftermarket Electronic Control Unit (ECU). However, scientific studies on this particular topic are still limited. Therefore, the purpose of this research is to examine the effect of the aftermarket Juken 5 ECU on the power, torque, emissions, and fuel consumption of the Yamaha R15-V3 bike. The results of the dynamometer testing showed that the motorcycle with the Juken 5 ECU experienced an average increase of 8.09 ± 1.30% in power and 7.79 ± 1.31% in torque, respectively, at 5500 – 11000 rpm. However, the concentrations of Carbon Monoxide and Hydrocarbon emissions also increased by 170% and 360%, respectively. Particulate emission measurements also revealed that the Juken 5 ECU usage resulted in a significant increase in particulate counts. Compared to the standard ECU, motorcycles equipped with the Juken 5 ECU produced 89% and 145% more particulates in the size range of 0.3 – 0.374 μm and 0.374 – 2.685 μm, respectively. The performance and emission data analysis results indicated that the increase in power and torque achieved by the Juken 5 ECU is simply due to more fuel being injected into the combustion chamber. This finding was supported by the results of fuel consumption testing, where using the aftermarket ECU increased motorcycle fuel consumption by 63.6%.
{"title":"KAJIAN EKSPERIMENTAL PENGARUH PENGGUNAAN ELECTRONIC CONTROL UNIT AFTERMARKET PADA DAYA, TORSI, EMISI DAN KONSUMSI BAHAN BAKAR SEPEDA MOTOR 150CC","authors":"A. Soewono, Marten Darmawan, Josephine Halim","doi":"10.21776/jrm.v14i2.1276","DOIUrl":"https://doi.org/10.21776/jrm.v14i2.1276","url":null,"abstract":"To improve motorbike performance, simple modifications are often applied using an aftermarket Electronic Control Unit (ECU). However, scientific studies on this particular topic are still limited. Therefore, the purpose of this research is to examine the effect of the aftermarket Juken 5 ECU on the power, torque, emissions, and fuel consumption of the Yamaha R15-V3 bike. The results of the dynamometer testing showed that the motorcycle with the Juken 5 ECU experienced an average increase of 8.09 ± 1.30% in power and 7.79 ± 1.31% in torque, respectively, at 5500 – 11000 rpm. However, the concentrations of Carbon Monoxide and Hydrocarbon emissions also increased by 170% and 360%, respectively. Particulate emission measurements also revealed that the Juken 5 ECU usage resulted in a significant increase in particulate counts. Compared to the standard ECU, motorcycles equipped with the Juken 5 ECU produced 89% and 145% more particulates in the size range of 0.3 – 0.374 μm and 0.374 – 2.685 μm, respectively. The performance and emission data analysis results indicated that the increase in power and torque achieved by the Juken 5 ECU is simply due to more fuel being injected into the combustion chamber. This finding was supported by the results of fuel consumption testing, where using the aftermarket ECU increased motorcycle fuel consumption by 63.6%.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134361106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A Wheeled Mobile Robot (WMR) is a robot that is often used for transporting a good in the industry. This study was conducted to integrate WMR with the Internet of Things (IoT) to control robots remotely, whereas wheeled robots with a DC motor driving power. Graphical User Interface (GUI) is applied for controlling this device via an Android smartphone. As a result; the robot can be driven via GUI commands with a forward speed = 0.535 m/s; reverse speed = 0.4 m/s; right-hand rotation speed = 25.2 rpm; left-hand rotation speed = 23.4 rpm. These robot performances are strongly influenced by the design, construction of the robot, the load received by the driving motor, and the capacity of the driving motor.
{"title":"PERANCANGAN ROBOT BERODA DENGAN SISTEM KENDALI BERBASIS IOT DAN GUI MENGGUNAKAN SMARTPHONE ANDROID","authors":"D. H. Al-janan, Gangsar Fadhil Muhammad","doi":"10.21776/jrm.v14i2.1450","DOIUrl":"https://doi.org/10.21776/jrm.v14i2.1450","url":null,"abstract":"A Wheeled Mobile Robot (WMR) is a robot that is often used for transporting a good in the industry. This study was conducted to integrate WMR with the Internet of Things (IoT) to control robots remotely, whereas wheeled robots with a DC motor driving power. Graphical User Interface (GUI) is applied for controlling this device via an Android smartphone. As a result; the robot can be driven via GUI commands with a forward speed = 0.535 m/s; reverse speed = 0.4 m/s; right-hand rotation speed = 25.2 rpm; left-hand rotation speed = 23.4 rpm. These robot performances are strongly influenced by the design, construction of the robot, the load received by the driving motor, and the capacity of the driving motor.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"279 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122029834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Weak suction and large vibrations indicate an Induced Draft Fan (IDF) problem. The Fast Fourier Transform (FFT) method cannot be applied to non-stationary vibration signals. Therefore, this study aims to analyze non-stationary vibration signals for IDF vibration signals at start-up so that the source of damage to the IDF can be found. The research process begins with a brief measurement of both bearing locations with horizontal and axial axes. Processing of the vibration signal from the measurement using the FFT method and the Short Time Fourier Transform (STFT). Based on the STFT spectrogram graph for measurements on the horizontal and axial axes, the dominant frequency values are the same. The frequency with the largest amplitude value is at one RPM IDF or 25 Hz. High vibration at 1 RPM is a big indication that the IDF is experiencing unbalance.
{"title":"INDUCED DRAFT FAN DOMINANT FREQUENCY DETECTION USING SHORT-TIME FOURIER TRANSFORM METHOD","authors":"Dedik Romahadi","doi":"10.21776/jrm.v14i2.1305","DOIUrl":"https://doi.org/10.21776/jrm.v14i2.1305","url":null,"abstract":"Weak suction and large vibrations indicate an Induced Draft Fan (IDF) problem. The Fast Fourier Transform (FFT) method cannot be applied to non-stationary vibration signals. Therefore, this study aims to analyze non-stationary vibration signals for IDF vibration signals at start-up so that the source of damage to the IDF can be found. The research process begins with a brief measurement of both bearing locations with horizontal and axial axes. Processing of the vibration signal from the measurement using the FFT method and the Short Time Fourier Transform (STFT). Based on the STFT spectrogram graph for measurements on the horizontal and axial axes, the dominant frequency values are the same. The frequency with the largest amplitude value is at one RPM IDF or 25 Hz. High vibration at 1 RPM is a big indication that the IDF is experiencing unbalance.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126683771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Motorcycle users in 2019 reached 133,617,012 units in Indonesia. The impact of a large number of motorcycle certainly attracts the interest of the industry to produce two-wheeled automotive vehicles. The piston is part of the engine that functions as a compression barrier in the combustion chamber, the piston material is aluminum alloy. Therefore, research was carried out on making pistons with investment casting methods, physical and mechanical patterns from 3D printers on pistons. This research starts from drawing the piston using CAD (computer-aided design), making a printed pattern from a 3D Printer machine with PLA (polylactide acid) material. The mold pattern is coated with a mixture of gypsum cement and silica powder. The casting process with a pouring temperature of 750ᵒC and a mold temperature of 200 ᵒC, 250 ᵒC, 300 ᵒC, 350 ᵒC, and 400 ᵒC. The results showed the largest grain size at a mold temperature of 400ᵒC. The highest hardness at 200 ᵒC mold temperature is 47.00 HRB and the lowest hardness at 400 ᵒC mold temperature is 40.56 HRB. The higher the temperature of the mold used, the level of porosity of a material will decrease. This is due to the temperature difference when pouring the molten metal and the lower mold temperature. This makes the metal solidification time longer. The higher the mold temperature, the slower the solidification time, the larger the grain structure, and the decreased hardness.
{"title":"PENGARUH TEMPERATUR CETAKAN TERHADAP STRUKTUR MIKRO DAN KEKERASAN PISTON HASIL PENGECORAN MENGGUNAKAN 3D PRINTING","authors":"Devi Andriani, Wahyono Suprapto, Yudy Surya Irawan, Alfeus Sunarso","doi":"10.21776/jrm.v14i1.1136","DOIUrl":"https://doi.org/10.21776/jrm.v14i1.1136","url":null,"abstract":"Motorcycle users in 2019 reached 133,617,012 units in Indonesia. The impact of a large number of motorcycle certainly attracts the interest of the industry to produce two-wheeled automotive vehicles. The piston is part of the engine that functions as a compression barrier in the combustion chamber, the piston material is aluminum alloy. Therefore, research was carried out on making pistons with investment casting methods, physical and mechanical patterns from 3D printers on pistons. This research starts from drawing the piston using CAD (computer-aided design), making a printed pattern from a 3D Printer machine with PLA (polylactide acid) material. The mold pattern is coated with a mixture of gypsum cement and silica powder. The casting process with a pouring temperature of 750ᵒC and a mold temperature of 200 ᵒC, 250 ᵒC, 300 ᵒC, 350 ᵒC, and 400 ᵒC. The results showed the largest grain size at a mold temperature of 400ᵒC. The highest hardness at 200 ᵒC mold temperature is 47.00 HRB and the lowest hardness at 400 ᵒC mold temperature is 40.56 HRB. The higher the temperature of the mold used, the level of porosity of a material will decrease. This is due to the temperature difference when pouring the molten metal and the lower mold temperature. This makes the metal solidification time longer. The higher the mold temperature, the slower the solidification time, the larger the grain structure, and the decreased hardness.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126670744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Meri Rahmi, Y. Y. Erlangga, A. Mahmudah, Badruzzaman Badruzzaman, Felix Dionisius
A press tool is used to cut or form a thin plate into the desired shape with a pressing process or a press machine. One of the main things in the design of the press tool is the calculation for determining the type, size and, material of the spring. The spring in the press tool design is placed on the stripper as a pressure plate material before it is formed. The problem that often occurs in the design of the press tool is the initial force of the spring and the number of springs often have high values. This has an impact on the difficulty of the operator in installing the spring during assembly. The installation on the press machine requires more energy that exceeds the operator's power. This problem is often a challenge in itself both in terms of designing and manufacturing press tools. Assumptions and limitations of the problem of the design is 12,64 kN. This force is used for the educational practicum materials. Based on the design calculations the number of springs needed are 4 springs. While the hydraulic required is 10 tons. The results obtained based on simulation analysis using Solidworks software, show that with the number of springs and hydraulics calculated and based on the design form of the stripper installation tool, it is in the safe category.
{"title":"RANCANG BANGUN ALAT BANTU PEMASANGAN PEGAS STRIPPER PRESS TOOL DENGAN SISTEM HIDROLIK","authors":"Meri Rahmi, Y. Y. Erlangga, A. Mahmudah, Badruzzaman Badruzzaman, Felix Dionisius","doi":"10.21776/jrm.v14i1.1098","DOIUrl":"https://doi.org/10.21776/jrm.v14i1.1098","url":null,"abstract":"A press tool is used to cut or form a thin plate into the desired shape with a pressing process or a press machine. One of the main things in the design of the press tool is the calculation for determining the type, size and, material of the spring. The spring in the press tool design is placed on the stripper as a pressure plate material before it is formed. The problem that often occurs in the design of the press tool is the initial force of the spring and the number of springs often have high values. This has an impact on the difficulty of the operator in installing the spring during assembly. The installation on the press machine requires more energy that exceeds the operator's power. This problem is often a challenge in itself both in terms of designing and manufacturing press tools. Assumptions and limitations of the problem of the design is 12,64 kN. This force is used for the educational practicum materials. Based on the design calculations the number of springs needed are 4 springs. While the hydraulic required is 10 tons. The results obtained based on simulation analysis using Solidworks software, show that with the number of springs and hydraulics calculated and based on the design form of the stripper installation tool, it is in the safe category.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116471439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Prima Nofan Ryastama, Damar Setyo Prakasa, Muhammad Latifur Rochman, Muji Setiyo
The Air Conditioning (AC) system is an important requirement for vehicle passengers to get thermal comfort. However, the AC system draws power from the engine to drive the compressor. Meanwhile, vehicles driven by Liquefied Petroleum Gas (LPG) provide decent cooling potential to assist the main air conditioning system. Therefore, this study aims to examine the effect of cooling on LPG-fueled vehicles by utilizing LPG flow to be used as a secondary refrigerant. The research was carried out on a 1495 cc engine with a special evaporator which was tested at variations of blower speed 1, 2, and 3. The tests were carried out at engine speeds of 1000, 2000, and 3000 rpm. The results showed the lowest cooling effect at blower speed level 1 with engine speed of 1000 rpm and the highest at blower speed level 3 with engine speed of 3000 rpm. The greatest cooling effect is obtained at 373 Watts at 3000 rpm engine speed and level 3 blower speed.
{"title":"STUDI EKSPERIMEN KINERJA SISTEM REFRIGERASI SETENGAH SIKLUS PADA KENDARAAN BERBAHAN BAKAR LPG","authors":"Prima Nofan Ryastama, Damar Setyo Prakasa, Muhammad Latifur Rochman, Muji Setiyo","doi":"10.21776/jrm.v14i1.1197","DOIUrl":"https://doi.org/10.21776/jrm.v14i1.1197","url":null,"abstract":"The Air Conditioning (AC) system is an important requirement for vehicle passengers to get thermal comfort. However, the AC system draws power from the engine to drive the compressor. Meanwhile, vehicles driven by Liquefied Petroleum Gas (LPG) provide decent cooling potential to assist the main air conditioning system. Therefore, this study aims to examine the effect of cooling on LPG-fueled vehicles by utilizing LPG flow to be used as a secondary refrigerant. The research was carried out on a 1495 cc engine with a special evaporator which was tested at variations of blower speed 1, 2, and 3. The tests were carried out at engine speeds of 1000, 2000, and 3000 rpm. The results showed the lowest cooling effect at blower speed level 1 with engine speed of 1000 rpm and the highest at blower speed level 3 with engine speed of 3000 rpm. The greatest cooling effect is obtained at 373 Watts at 3000 rpm engine speed and level 3 blower speed.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132520843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Moch. Chamim, M. Margono, Fatimah Nuur Hidayah, Nugroho Tri Atmoko
The purpose of this study was to determine how the mechanical properties and microstructure formed on low alloy steel (tooth bucket) heated at temperatures of 850 ⁰C and 850 ⁰C then held for 15 minutes after that it was cooled with oil. The material hardening process was carried out by testing the Vickers hardness, impact, and observing the microstructure using an optical microscope with 200x magnification. Hardness values obtained from low alloy steel after heat treatment at temperatures of 800 ⁰C and 850 ⁰C are 389.2 HV and 414.6 HV. The optimum hardness is obtained at a temperature of 850 ⁰C with an increase of about 1.14% compared to that of raw material, which is 364.5 HV. From the results of the impact test on heat treatment with a temperature of 850 ⁰C, the highest impact value is 0.574 Joule/mm2. Furthermore, the results of the microstructure on heat treatment at a temperature of 850 ⁰C resulted in homogeneous microstructures, namely chrome, martensite, and bainite.
{"title":"KARAKTERISASI SIFAT MEKANIK DAN STRUKTUR MIKRO PADA BAJA PADUAN RENDAH HASIL PROSES HARDENING","authors":"Moch. Chamim, M. Margono, Fatimah Nuur Hidayah, Nugroho Tri Atmoko","doi":"10.21776/jrm.v14i1.1080","DOIUrl":"https://doi.org/10.21776/jrm.v14i1.1080","url":null,"abstract":"The purpose of this study was to determine how the mechanical properties and microstructure formed on low alloy steel (tooth bucket) heated at temperatures of 850 ⁰C and 850 ⁰C then held for 15 minutes after that it was cooled with oil. The material hardening process was carried out by testing the Vickers hardness, impact, and observing the microstructure using an optical microscope with 200x magnification. Hardness values obtained from low alloy steel after heat treatment at temperatures of 800 ⁰C and 850 ⁰C are 389.2 HV and 414.6 HV. The optimum hardness is obtained at a temperature of 850 ⁰C with an increase of about 1.14% compared to that of raw material, which is 364.5 HV. From the results of the impact test on heat treatment with a temperature of 850 ⁰C, the highest impact value is 0.574 Joule/mm2. Furthermore, the results of the microstructure on heat treatment at a temperature of 850 ⁰C resulted in homogeneous microstructures, namely chrome, martensite, and bainite.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128255557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This aims of this study to determine the effect of multilayer welding on ASTM A106 type carbon steel pipe material on the characteristics of the microstructure, hardness and maximum tensile strength of the material. ASTM A106 type carbon steel pipe is used as a raw material for welding using the Shielded Metal Arc Welding (SMAW) method. Welding on material joints is carried out in three layers (multilayer welding), namely the root pass, hot pass, and capping layers. There are two variations of welding specimens carried out in this study, namely in specimen 1 the currents used were 60, 70 and 80 A while in specimen 2 the currents used were 70, 80 and 90 A. To determine the effect of current variations on each specimen carried out three include Vickers Testing, microstructure testing and tensile testing. The results show that the base metal area is dominated by the ferrite phase, which indicates that the area has low hardness while the weld shows more perlite phase than ferrite besides the grain size is smaller and denser; this indicates that the hardness level will increase when compared to base metal. The results of the hardness test for all variations of the specimen concluded that the highest hardness value was in the weld. From the tensile test, it can be concluded that specimen 2 has a greater tensile strength of 2.5% when compared to specimen 1.
{"title":"ANALISIS PENGARUH ARUS PADA PENGELASAN BERTINGKAT (MULTILAYER WELDING) TERHADAP STRUKTUR MIKRO, KEKERASAN DAN KUAT TARIK SAMBUNGAN MATERIAL ASTM A106","authors":"Nugroho Tri Atmoko, Elkana Bilak Lopo, Moch. Chamim, Hendi Lilih Wijayanto","doi":"10.21776/jrm.v14i1.1210","DOIUrl":"https://doi.org/10.21776/jrm.v14i1.1210","url":null,"abstract":"This aims of this study to determine the effect of multilayer welding on ASTM A106 type carbon steel pipe material on the characteristics of the microstructure, hardness and maximum tensile strength of the material. ASTM A106 type carbon steel pipe is used as a raw material for welding using the Shielded Metal Arc Welding (SMAW) method. Welding on material joints is carried out in three layers (multilayer welding), namely the root pass, hot pass, and capping layers. There are two variations of welding specimens carried out in this study, namely in specimen 1 the currents used were 60, 70 and 80 A while in specimen 2 the currents used were 70, 80 and 90 A. To determine the effect of current variations on each specimen carried out three include Vickers Testing, microstructure testing and tensile testing. The results show that the base metal area is dominated by the ferrite phase, which indicates that the area has low hardness while the weld shows more perlite phase than ferrite besides the grain size is smaller and denser; this indicates that the hardness level will increase when compared to base metal. The results of the hardness test for all variations of the specimen concluded that the highest hardness value was in the weld. From the tensile test, it can be concluded that specimen 2 has a greater tensile strength of 2.5% when compared to specimen 1.","PeriodicalId":167086,"journal":{"name":"Jurnal Rekayasa Mesin","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134070523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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