Journal of Metallurgical Engineering and Processing Technology最新文献

{"title":"PROSES ACID WASH UNTUK MENURUNKAN KADAR PENGOTOR PADA CAKE HASIL MERRIL CROWE","authors":"Tri Wahyuningsih, W. Pamungkas","doi":"10.31315/jmept.v2i2.6524","DOIUrl":"https://doi.org/10.31315/jmept.v2i2.6524","url":null,"abstract":"","PeriodicalId":196240,"journal":{"name":"Journal of Metallurgical Engineering and Processing Technology","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121710600","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}

{"title":"KAJIAN TEKNIS ALAT PEREMUK UNTUK MENINGKATKAN PRODUKSI PT. GUNUNG PUNCAK SALAM PROVINSI JAWA BARAT","authors":"Ratih Hardini Kusuma Putri, Casimiro Orleans Martins, Avellyn Shinthya Sari, Esthi Kusdarini, Fairus Atika Redanto Putri","doi":"10.31315/jmept.v2i2.6719","DOIUrl":"https://doi.org/10.31315/jmept.v2i2.6719","url":null,"abstract":"","PeriodicalId":196240,"journal":{"name":"Journal of Metallurgical Engineering and Processing Technology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130207912","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}

{"title":"PENGARUH KADAR IMPURITIS PADA MOLTEN ALUMINIUM TERHADAP STANDAR GRADE ALUMINIUM (SGA) DI STASIUN HPM CENTRE PT INALUM (PERSERO) – KUALA TANJUNG","authors":"Anton Sudiyanto, Intan Maharani, Muhamad Alfa Rizky","doi":"10.31315/jmept.v2i2.5596","DOIUrl":"https://doi.org/10.31315/jmept.v2i2.5596","url":null,"abstract":"One of the suppliers of aluminum needs in the world and in Indonesia is PT INALUM (Persero) with a production capacity of 260,000 tons per year. The aluminum products manufactured by PT INALUM (Persero) consist of bars, alloys and billets with different degrees of purity. Apart from these 3 products, however, there are other products that also have a higher sales value, namely S1-B products. In the aluminum smelting process, it is certain that 100% pure aluminum cannot be produced; the result is impurities. In this case, the more closely observed impurities are silicon (Si) and iron (Fe). PT INALUM offers several standards for the purity of aluminum. The compositional test aims to determine the level of impurities in the aluminum sample. This test was carried out with OES (Optical Emission Spectrophotometer). This test begins by taking a sample of the Test Product Metal (TPM) from molten aluminum, then cooling the sample and then sending it to Smelter Quality Assurance (SQA) to determine the purity and impurity levels. Based on the results of the analysis, the malleable aluminum is grade S1-A with an aluminum content of 99.92% and S1-B with an aluminum content of 99.90%. For example, the batch number 210520 must be printed with a purity of 99.92% for type S1-A. In the meantime, batch number 210536 with 99.91% aluminum purity cannot be printed for grade S1-A. Because when printing for type S1-A there are still impurities in it and for type G1 the purity is still too high. Therefore it is necessary to make adjustments to the given grade. Keyword : HPM Centre Station, Ingot, Impurities and Standar Grade Aluminium Abstrak Salah satu pemasok kebutuhan aluminium dunia dan Indonesia adalah PT INALUM (Persero) dengan kapasitas produksi masih sebesar 260.000 ton per tahun. Produk aluminium yang dihasilkan pada PT INALUM (Persero) terdiri dari ingot, alloy dan billet dengan tingkat kemurnian yang berbeda. Namun selain 3 produk tersebut ada produk lain yang juga memiliki nilai jual lebih tinggi, yaitu produk S1-B. Dalam proses peleburan aluminium pastilah tidak dapat dihasilkan aluminium yang 100% murni, terdapat zat pengotor didalam hasilnya. Dalam hal ini, zat pengotor yang lebih dicermati adalah silikon (Si) dan besi (Fe). PT INALUM memberikan beberapa standar terhadap kemurnian dari aluminium. Pengujian komposisi bertujuan untuk mengetahui kadar pengotor yang terkandung pada sample aluminium. Pengujian ini dilakukan menggunakan OES (Optical Emission Spectrofotometer). Pengujian ini dimulai dari pengambilan sample Test Product Metal (TPM) aluminium cair, kemudian sample tersebut didinginkan dan setelah itu sample dikirim ke bagian Smelter Quality Assurance (SQA) untuk mengetahui kemurnian dan kandungan zat pengotornya. Berdasarkan hasil analisis, aluminium yang memungkinkan dicetak adalah grade S1-A dengan kadar aluminium 99,92% dan S1-B dengan kadar aluminium 99,90%. Sebagai contoh untuk nomor lot 210520 dengan kemurnian 99,92% harus dicetak untuk grade","PeriodicalId":196240,"journal":{"name":"Journal of Metallurgical Engineering and Processing Technology","volume":"11 32","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120863478","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}

{"title":"PENGARUH PROSES QUENCHING-TEMPERING DALAM MENINGKATKAN SIFAT MEKANIK PIPA LOW CARBON STEEL LOW ALLOY GRADE J55 MENJADI GRADE P110","authors":"Agris Setiawan, Hero Tambunan","doi":"10.31315/jmept.v2i2.6533","DOIUrl":"https://doi.org/10.31315/jmept.v2i2.6533","url":null,"abstract":"Baja  adalah  logam  paduan  dengan  besi  sebagai  unsur  dasar dan karbon sebagai unsur paduan utamanya. Kandungan karbon dalam baja berkisar antara 0.2% hingga 2.1% berat sesuai grade-nya. Fungsi karbon dalam baja adalah sebagai unsur pengeras. Unsur paduan lain yang biasa ditambahkan selain karbon adalah mangan, krom, vanadium, dan nikel. Dengan memvariasikan kandungan karbon dan unsur paduan lainnya, berbagai jenis kualitas baja bisa didapatkan. Penambahan kandungan karbon pada baja dapat meningkatkan kekerasan dan kekuatan tariknya, namun di sisi lain membuatnya menjadi getas serta menurunkan keuletannya. Proses heat treament atau proses perlakuan panas yang dilakukan terhadap sesuatu material dalam hal ini logam dengan tujuan untuk mendapatkan sifat mekanik tertentu (sesuai dengan keinginan). Untuk mencapai tujuan tersebut pada umumnya dengan melakukan kombinasi pengoperasian antara pemanasan dan pendinginan. Material dipanaskan pada temperature tertentu, ditahan dengan waktu penahanan tertentu dan diikuti dengan pendinginan dengan laju pendinginan tertentu.","PeriodicalId":196240,"journal":{"name":"Journal of Metallurgical Engineering and Processing Technology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131137174","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}

{"title":"PENGARUH KUAT ARUS TERHADAP KEKUATAN TARIK PADA PROSES PENGELASAN BAJA SM 400 B MENGGUNAKAN PROSES PENGELASAN SMAW DI PT. BARATA INDONESIA (Persero) DIVISI SUMBER DAYA AIR - TEGAL","authors":"Dyah Probowati, Margaretha Tri Budi Yuliana","doi":"10.31315/jmept.v2i2.6508","DOIUrl":"https://doi.org/10.31315/jmept.v2i2.6508","url":null,"abstract":"PT. Barata Indonesia (Persero) Tegal Water Resources Division is one of the hydromechanical workshops that specializes in hydromechanical and supports the fabrication and installation of the Water Resources Division. This workshop focuses on mechanical work for water structures such as penstock pipes, valves and trashracks in dams, sluice gates in dams and flood control pumps. This research is entitled \"Effect of Strong Current on Tensile Strength in SM 400 B Steel Welding Process Using SMAW Welding Process at PT Barata Indonesia (Persero) Water Resources Division-Tegal\". The purpose of this study was to determine the effect of current strength on tensile strength and to determine welding defects caused by currents that are not in accordance with the welding procedure specification (WPS). The test method is first to look for supporting literature, next is to collect field data, then analyze the data. The welding is carried out using the SMAW method with the material in the form of SM 400 B steel, and electrodes E 7016 with a diameter of 3.2. Based on the research that has been done, it is known that the greater the current, the greater the value of the tensile strength, and vice versa, the smaller Journal Of Metallurgical Engineering And Processing Technology, Vol. 2, N0. 2, February 2022, pp.39-46 P-ISSN: 2723-6854, E-ISSN: 2798-1037 40 the current, the smaller the value of the tensile strength. In addition, the current strength must match the WPS. If the welding current does not match the WPS, a welding defect will occur. Welding currents that are too low will cause welding defects in the form of undercuts, welding spatter defects,while welding currents that are too high will cause welding defects in the form of porosity, incomplete penetration. Keyword: Welding, Current Strength, Tensile Strength, Defect.","PeriodicalId":196240,"journal":{"name":"Journal of Metallurgical Engineering and Processing Technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125527806","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}

{"title":"Pengaruh Suhu Tuang dan Cetakan Pengecoran Aluminiun Bekas Menggunakan Gravity Die Casting terhadap Kecacatan","authors":"Untung Sukamto, Muhammad Fauzan Bawono Putra","doi":"10.31315/jmept.v2i2.6512","DOIUrl":"https://doi.org/10.31315/jmept.v2i2.6512","url":null,"abstract":"","PeriodicalId":196240,"journal":{"name":"Journal of Metallurgical Engineering and Processing Technology","volume":"2017 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114783701","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}

{"title":"PENGARUH METODE CHARGING MATERIAL TERHADAP ELECTRICAL POWER PADA PROSES PELEBURAN ELECTRIC ARC FURNACE DI SMS-1 DAN SMS-2 PT. GUNUNG RAJA PAKSI CIKARANG BARAT BEKASI","authors":"Muhammad Andre, Sudaryanto Sudaryanto","doi":"10.31315/jmept.v2i2.6513","DOIUrl":"https://doi.org/10.31315/jmept.v2i2.6513","url":null,"abstract":"Baja  adalah  logam  paduan  dengan  besi  sebagai  unsur  dasar  dan karbon sebagai unsur paduan utamanya. Kandungan karbon dalam baja berkisar antara 0.2% hingga 2.1% berat sesuai grade-nya. Penambahan kandungan karbon pada baja dapat meningkatkan kekerasan (hardness) dan kekuatan tariknya (tensile strength), namun di sisi lain membuatnya menjadi getas (brittle) serta menurunkan keuletannya (ductility). Steelmaking adalah proses produksi baja dari bijih besi dan/atau scrap . Dalam pembuatan baja, pengotor seperti nitrogen , silikon , fosfor , belerang dan kelebihan karbon (pengotor yang paling penting) dihilangkan dari sumber besi, dan elemen paduan seperti mangan, nikel, kromium, karbon, dan vanadium ditambahkan untuk menghasilkan nilai yang berbeda dari baja. Electric Arc Furnace (EAF) adalah salah satu teknologi yang umum dan popular digunakan dalam industri baja. EAF digunakan untuk memproduksi baja karbon dan baja paduan terutama dengan mendaur ulang scrap besi. Dalam EAF, scrap dan / atau unit besi yang diproduksi - seperti DRI, pig iron, besi karbida dilebur dan diubah menjadi baja berkualitas tinggi menggunakan busur listrik daya tinggi tanpa mengubah sifat elektrokimia logam. Pemuatan scrap (scrap charging) dapat dilakukan dengan 2 metode  yaitu sistem pemuatan scrap dengan bucket (conventional charging) dan sistem pemuatan scrap secara kontinyu (continuous scrap charging). Metode pemuatan scrap ini berpengaruh pada jalannya proses peleburan mulai dari electrical power maupun lama waktu proses peleburannya.","PeriodicalId":196240,"journal":{"name":"Journal of Metallurgical Engineering and Processing Technology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115661559","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}