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Journal : Journal of Science Technology (JoSTec)

 1 
THE INFLUENCE OF CURRENT STRENGTH ON THE TOUGHNESS OF JOINTS IN THE ELECTRODE ELECTRIC ARC WELDING PROCESS WRAPPED (SMAW) AISI 4340 STEEL Pratama, Andre; Julian; Supriono
Journal of Science Technology (JoSTec) Vol. 6 No. 1 (2024): Journal of Science Technology (JoSTec)
Publisher : PT Inovasi Pratama Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55299/jostec.v6i1.846

Abstract

The development of advanced construction technology cannot be separated from welding, as it plays an important role in constructing and repairing metal structures. At present, the construction of metal structures involves a lot of welding elements, especially in the field of good quality design. Based on the background, the problem can be formulated, namely, the effect of current strength on strength of Aisi 4340 steel joints after SMAW welding treatment. The research method used is the impact test method to see the results of the influence of strong currents in steel joints. The results of this study are the value of impact toughness at a current variation of 80 Ampere, the first specimen is 0.56080 J/mm2, the second specimen is 0.54811 J/mm2, and the third is 0.51724 J/mm2. The impact toughness value at 95 amps variation of the first sample is 0.01869 J/mm2, the second is 0.05481 J/mm2, and the third is 0.05172 J/mm2. From the test data, it can be seen that the average value of the average impact toughness in the variation of current strength of 80 Ampere and 95 Ampere is 80 Ampere current average impact toughness value of 0.54205 J/mm2 and 95 Ampere current average impact toughness value of 0.04174 J/m2. That the 80 ampere current variation is better and more efficient because it produces a higher toughness value than the 95 ampere current variation.
THE EFFECT OF CUTTING SPEED ON SURFACE ROUGHNESS IN THE TURNING PROCESS OF AISI 1045 CARBON STEEL USING KOBE M2 HSS CHISELS Tarigan, Bersyeba; Rasyid, Muksin; Supriono
Journal of Science Technology (JoSTec) Vol. 6 No. 1 (2024): Journal of Science Technology (JoSTec)
Publisher : PT Inovasi Pratama Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55299/jostec.v6i1.847

Abstract

The purpose of this multilevel shaft turning performance is to analyze the specimen used, namely medium carbon steel alloy and get good workpiece results, knowing the ductility of the workpiece by adjusting the tool blade, speed, time, depth of cut, and surface roughness. The research method used is the impact test method to see the results of the influence of strong currents in steel joints. The results of this study are cutting speed is very influential on the results of the surface roughness of the test material, can be seen from the data analysis and research results. The surface of the test material with the highest level of smoothness is obtained from the use of the lowest cutting speed (100 m/min) with a roughness level of (4.1). The highest roughness level (7.1) with the cutting speed used (200 m/min). The higher the cutting speed used, the greater the price of the surface roughness value obtained or produced. However, the wear of the tool blade used is likely to also affect the level of surface roughness. Geram income depends on the cutting speed, the greater the feeding motion used, the greater the thickness of the resulting geram. The smaller the cutting speed used, the smaller the resulting furrow.
THE INFLUENCE OF CURRENT STRENGTH ON THE TOUGHNESS OF JOINTS IN THE ELECTRODE ELECTRIC ARC WELDING PROCESS WRAPPED (SMAW) AISI 4340 STEEL Pratama, Andre; Julian; Supriono
Journal of Science Technology (JoSTec) Vol. 6 No. 1 (2024): Journal of Science Technology (JoSTec)
Publisher : PT Inovasi Pratama Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55299/jostec.v6i1.846

Abstract

The development of advanced construction technology cannot be separated from welding, as it plays an important role in constructing and repairing metal structures. At present, the construction of metal structures involves a lot of welding elements, especially in the field of good quality design. Based on the background, the problem can be formulated, namely, the effect of current strength on strength of Aisi 4340 steel joints after SMAW welding treatment. The research method used is the impact test method to see the results of the influence of strong currents in steel joints. The results of this study are the value of impact toughness at a current variation of 80 Ampere, the first specimen is 0.56080 J/mm2, the second specimen is 0.54811 J/mm2, and the third is 0.51724 J/mm2. The impact toughness value at 95 amps variation of the first sample is 0.01869 J/mm2, the second is 0.05481 J/mm2, and the third is 0.05172 J/mm2. From the test data, it can be seen that the average value of the average impact toughness in the variation of current strength of 80 Ampere and 95 Ampere is 80 Ampere current average impact toughness value of 0.54205 J/mm2 and 95 Ampere current average impact toughness value of 0.04174 J/m2. That the 80 ampere current variation is better and more efficient because it produces a higher toughness value than the 95 ampere current variation.
THE EFFECT OF CUTTING SPEED ON SURFACE ROUGHNESS IN THE TURNING PROCESS OF AISI 1045 CARBON STEEL USING KOBE M2 HSS CHISELS Tarigan, Bersyeba; Rasyid, Muksin; Supriono
Journal of Science Technology (JoSTec) Vol. 6 No. 1 (2024): Journal of Science Technology (JoSTec)
Publisher : PT Inovasi Pratama Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55299/jostec.v6i1.847

Abstract

The purpose of this multilevel shaft turning performance is to analyze the specimen used, namely medium carbon steel alloy and get good workpiece results, knowing the ductility of the workpiece by adjusting the tool blade, speed, time, depth of cut, and surface roughness. The research method used is the impact test method to see the results of the influence of strong currents in steel joints. The results of this study are cutting speed is very influential on the results of the surface roughness of the test material, can be seen from the data analysis and research results. The surface of the test material with the highest level of smoothness is obtained from the use of the lowest cutting speed (100 m/min) with a roughness level of (4.1). The highest roughness level (7.1) with the cutting speed used (200 m/min). The higher the cutting speed used, the greater the price of the surface roughness value obtained or produced. However, the wear of the tool blade used is likely to also affect the level of surface roughness. Geram income depends on the cutting speed, the greater the feeding motion used, the greater the thickness of the resulting geram. The smaller the cutting speed used, the smaller the resulting furrow.
Co-Authors Aji Mubarak, Muhammad Astuti Purnamawati, Ditha Baehaqi Budiarto, Andika Agus Bulkis, Sofyan Chanifah Cipta Ramadhani Dani Rizana Devi Safitri Dody Purwanto, Dody Eka Hariyani Erlyasari, Nova Fachrureza, Mochamad Gonius, Andry Halfi Nurhakiki Hartaya, Arsy Hanandya Hendro Priyatman I Ketut Perdana Putra I Ketut Wiryajati I Made Budi Suksmadana I Nyoman Wahyu Satiawan I Nyoman Wahyu Satiawan Ida Ayu Sri Adnyani Ida Bagus Fery Citarsa Ida Bagus Fery Citarsa Ilham Akbar Indro Yuwono, Bambang Julian Larasati, Putu Anissa M Atta, Bary Made Budi Suksmadana Margaretta Nuke Tanjungsari Muh. Revaldi Frizky Mulyadi, Fadli Mustofa Aidid Nabila, Salsala Sifa Nasution, Ardiansyah Nasution, Muhammad Iqbal Hanafi Ni Made Seniari Nia Agustiningsih, Nia Novi Khila Firani Pratama, Kharisma Priyanto, Tia Rahmi Purwanto Putri, Dinda Amalia Eka Rafly Hadi Pangestu Rasyid, Muksin Reni Suci Wahyuni Ria Nelly Sari Rohmi, Rohmi RR. Ella Evrita Hestiandari Ruhul Fitrios Sahri, Rafida Ramania Seno D. Panjaitan Setiawan, Arik Agung Shakira Yuliandini Shinta Oktya Wardhani, Shinta Oktya Sholihah, Al Imroatus Sitepu, Ade Siti Fatonah Soiman Solikhin sri, ida ayu Suhendra, Ade Sulastri, Rika Syafaruddin Ch Syifa Mustika Tarigan, Bersyeba Thamrin, Herijanto Usada, Widia Usman Vince Ratnawati W, Caecilia Rosma Wahyu Satiawan Warindi Wibowo, Bogi Pratomo Yunus Nasution, Ahmad