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Journal of Welding Technology
Published by Politeknik Negeri Lhokseumawe
ISSN : 27161471     EISSN : 27160475     DOI : -
Core Subject : Science, Engineering,
Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
The main scope of the journal is to publish original research articles in the area of Welding Technology The main focus of the journal is on experimental research. The scope of the journal includes;
Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)
Articles 65 Documents
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Pengaruh arus pengelasan SMAW terhadap kekuatan sambungan las double lap joint pada material AISI 1050 Azwinur Azwinur; Adi Saputra Ismy; Rizky Nanda; Ferdiyansyah Ferdiyansyah
Journal of Welding Technology Vol 2, No 1 (2020): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v2i1.1833

Abstract

Pengelasan merupakan ikatan metalurgi pada sambungan logam atau logam paduan yang dilakukan dalam keadaan lumer atau cair. Mengelas adalah suatu aktifitas menyambung dua bagian logam atau lebih dengan cara memanaskan atau menekan atau gabungan dari keduanya sedemikian rupa sehingga menyatu seperti benda utuh. Kekuatan sambungan pengelasan merupakan syarat dari sebuah konstruksi terutama di industri migas seperti pada instalasi perpipaan dan tanki bertekanan. Prosedur mengelas dan parameternya merupakan suatu hal yang sangat mempengaruhi kekuatan dari sambungan las. Penelitian ini bertujuan untuk mengetahui kekuatan sambungan lap joint terhadap hasil pengelasan SMAW pada baja AISI 1050 dengan elektroda 7016.Variasi arus yang digunakan dalam proses pengelasan ini yaitu 100A, 125A dan 150A. Hasil penelitian menunjukkan bahwa arus pengelasan sangat mempengaruhi kekuatan sambungan las, hal ini dapat terlihat dari nilai kekuatan tegangan tarik dimana nilai tertinggi pada spesimen yang dilas dengan arus 100A sebesar 74.05 kgf/mm2, sedangkan untuk tegangan tarik terendah pada spesimen dengan arus pengelasan 150A dengan nilai tegangan tariknya sebesar 68.60 kgf/mm2. Hasil bentuk patahan setelah proses pengujian tensile test tidak terjadi pada daerah weld metal dan bentuk patahan yang terjadi dapat dikategorikan dalam bentuk patahan getas. AbstractWelding is a metallurgical bond in a metal or alloy metal connection which is done in a liquid state. Welding is an activity of joint two or more metal parts by heating or pressing or a combination of the two in such a way that they merge like whole objects. The strength of the welding joint is a prerequisite for a construction especially in the oil and gas industry such as in piping installations and pressurized tanks. The welding procedure and its parameters is a matter that greatly affects the strength of the welded joint. This study aims to determine the strength of the double lap joint to the SMAW welding results on AISI 1050 steel with 7016 electrodes. Current variations used in this welding process are 100A, 125A and 150A. The results showed that the welding current greatly affected the strength of the weld joint, this can be seen from the value of the tensile stress strength where the highest value in the specimens welded with a current of 100A was 74.05 kgf / mm2, while for the lowest tensile stress on the specimen with a welding current of 150A with a value of tensile stress of 68.60 kgf / mm2. The results of the fracture form after the tensile test does not occur in the weld metal area and the shape of the fracture that occurs can be categorized in the form of brittle fracture. 
Pengaruh variasi sudut kampuh bevel groove terhadap kekuatan tarik material Stainless Steel 304 Husnul Fata; Muhammad Razi; Syukran Syukran
Journal of Welding Technology Vol 2, No 1 (2020): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v2i1.1128

Abstract

Gas Tungsten Arc Welding (GTAW) adalah suatu proses pengelasan dengan menggunakan gas mulia sebagai pelindung. Untuk menghasilkan busur listrik, digunakan elektroda yang tidak terkonsumsi terbuat dari logam tungsten atau paduannya yang memiliki titik lebur tinggi. Baja tahan karat austenite 304 atau yang sering disebut stainless steel 304 merupakan baja paduan dengan kandungan Cr 18-20%, dan Ni 8-10,5%. Baja jenis ini biasa digunakan sebagai bahan kontruksi utama dalam beberapa industri seperti nuklir, kimia, dan makanan. Baja ini memiliki ketahanan terhadap korosi yang baik karena terdapat lapisan kromium oksida pada permukaannya. SS304 merupakan baja yang memiliki tingkat kekerasan rendah sekitar 123 HB dan kekuatan tarik sebesar 505 N/mm². Penelitian ini bertujuan untuk mengetahui kekuatan tarik hasil pengelasan GTAW pada baja tahan karat SS304 dengan variasi sudut kampuh bevel. Dari pengujian yang telah dilakukan, diketahui bahwa kekuatan tarik tertinggi terdapat pada material tanpa penyambungan dengan nilai rata- rata kekuatan tarik 63.84 kgf/mm², sedangkan pada material yang dilas kekuatan tertinggi terdapat pada kampuh bevel dengan sudut 40° dengan nilai rata- rata 55.30 kgf/mm°, sedangkan kekuatan tarik terendah terdapat pada kampuh bevel dengan sudut 35° dengan rata- rata kekuatan tarik 50.68 kgf/mm².Kata kunci :  Pengelasan GTAW, stainless steel 304, kekuatan tarik, elektroda EWTH-2, kampuh. Effect of groove variations on the tensile strength of the material Stainless Steel 304 AbstractGas Tungsten Arc Welding (GTAW) is a welding process using argon gas as a shield. To produce electric arcs, non-consumed electrodes made of tungsten metal or alloys that have a high melting point. Stainless steel 304 is an alloy steel with 18-20% Cr content, and Ni 8-10.5%. This type of steel is commonly used as the main construction material in several industries such as nuclear, chemical, and food. This steel has good corrosion resistance because there is a layer of chromium oxide on its surface. SS304 is a steel that has a low hardness level of about 123 HB and tensile strength of 505 N / mm². This study aims to determine the tensile strength of GTAW welding results in SS304 stainless steel with a variation of the groove angle. From the tests that have been carried out, it is known that the highest tensile strength is in the material without connection with an average tensile strength value of 63.84 kgf / mm², while in the material welded the highest strength is in the bevel groove with an angle of 40 ° with an average value of 55.30 kgf / mm °, while the lowest tensile strength is in the bevel groove with an angle of 35 ° with an average tensile strength of 50.68 kgf / mm². 
Pengaruh Variasi Temperatur PWHT Dan Tanpa PWHT Terhadap Sifat Kekerasan Baja ASTM A 106 Grade B Pada Proses Pengelasan SMAW Muhammad Femi Imanudin Purba; Al Fathier Al Fathier; Fakhriza Fakhriza
Journal of Welding Technology Vol 2, No 1 (2020): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v2i1.1132

Abstract

Penelitian ini bertujuan untuk mengetahui nilai keseragaman kekerasan pada bagian-bagian yang terpengaruhi panas setelah dilakukan proses pengelasan dengan cara perlakuan panas atau Post Weld Heat Treatment (PWHT) yaitu pada daerah Base Metal, Heat Affected Zone (HAZ) dan Weldmetal. Penelitian ini menggunakan bahan baja ASTM A 106  Grade B, baja ini termasuk bahan karbon rendah. Menggunakan pengelasan SMAW dengan elektroda yang digunakan LB-52-18 Ø3,2. Pengujian kekerasan menggunakan mesin Hardness Test, ASTM A 106 Grade B Grade B ini merupakan baja karbon rendah dengan sedikit kandungan silikon beberapa hasil penelitian menemukan bahwa kandungan siliconnya adalah 0,03. Posisi pengelasan dengan menggunakan posisi pengelasan 1G atau ketika mengelas pipa berputar pada sumbu horizontal, jenis kampuh yang digunakan adalah kampuh V dengan sudut 70 o. Nilai kekerasan rata-rata spesimen yang tanpa perlakuan panas ini adalah Base Metal-1 (63,2) HAZ-1 (59,2) Weldmetal (60,67) HAZ-2 (62) dan Base Metal-2 (66,67). Dan adapun nilai kekerasan yang hampir mendekati dengan nilai kekerasan pada spesimen yang tanpa perlakuan panas adalah spesimen yang mendapat perlakuan panas dengan termperatur 400 derajat celcius dengan waktu pencapaian 30 menit dan ditahan dengan waktu 20 menit dengan nilai kekerasan rata-rata Base Metal-1 (72,17) HAZ-1 (59) Weldmetal (59,27) HAZ-2 (59,83) dan Base Metal-2 (72,5). Kata kunci :Pengelasan, Post Weld Heat Treatment (PWHT), Nilai Keseragaman Kekerasan
Analisa pengaruh variasi arus pengelasan GTAW pada baja AISI 1050 terhadap sifat fisik dan mekanis T. Juwandi; Jenne Syarif; zulkiflli zulkiflli
Journal of Welding Technology Vol 3, No 1 (2021): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v3i1.2026

Abstract

Analysis of the effect of variations in welding current GTAW on AISI 1050 steel on physical and mechanical properties, the aim of research is to determine the stress strength, strain and see to determine the character or treatment of AISI 1050 steel. The welding process is closely related to defects that affect its mechanical properties. In this study, the welding process was carried out under the hands of the IASI 1050 material with a thickness of 12 mm with an AWS ER70S-6 electrode with a diameter of 1.2 mm with a current variation of 110 amperes, 120 amperes and 130 amperes with tests carried out are tensile and microstructure testing. From the results of the tensile test, it can be concluded that the tensile stress on the 110 amper specimen is 83.34 kgf/mm2, and the tensile voltage at 120 amperes is 43.45 kgf / mm2, and the tensile voltage at 130 amperes is 67, 97 kgf/mm2 that the higher the welding current, the more ductile the tensile strength value and the greater the welding current, the rougher the surface metallography results.
Desain tangki timbun external floating roof kapasitas 75000 MT Kevin Satria Nugraha; Muhamad Ari; Mochammad Al Amin Karim Al Amin
Journal of Welding Technology Vol 2, No 2 (2020): Desember
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v2i2.2063

Abstract

Storage tanks are widely used in industry, especially as a storage area for oil and gas mining products. Various types of storage tanks are made based on the pressure, the type of fluid stored and the type of roof used. The roof on the storage tank is divided into a fixed roof, internal floating roof and external floating roof. Floating roof is used as a barrier between the fluid and the empty space in the tank so as to minimize the occurrence of vapor space and the possibility of a fire in the tank. This study discusses the design of an external floating roof storage tank for condensate fluid with a capacity of 75000 metric tons. The design process for the shell course and other parts of the stockpile tank is based on the API 650 standard 12 addendum 2018 edition using the variable design point method. Verification of the results of calculations generated manually is done with finite element software. Manual calculations for the construction of an external floating roof heap tank get the minimum shell plate thickness used is 10 mm. The bottom plate was found to be 8 mm thick. The simulation using finite element software produces the maximum stress values on the shell, shell to bottom, and roof, namely 1.937 MPa, 7,122 MPa, 0.216 MPa, respectively. All stresses that occur are still below the allowable stress of the material. So it can be concluded that the tank construction is still safe
Analisa pengaruh kuat arus hasil pengelasan GMAW terhadap kekerasan material ASTM A 36 Juwanda Juwanda; Saifuddin Saifuddin; Marzuki Marzuki
Journal of Welding Technology Vol 3, No 1 (2021): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v3i1.2027

Abstract

GMAW welding is a welding process that uses CO2 gas as a protective medium for weld metal from the influence of outside air. This welding uses a heat source from electrical energy which is converted or converted into heat energy. While ASTM A 36 steel plate is steel that has a carbon content of 0.30% so it is classified as low carbon steel. This steel is widely used in the market because it has many advantages, one of which has good welding properties (machinability), good wear resistance (wear) and good mechanical properties as well. This study aims to determine the hardness value of the welding results using the hardness test method in the GMAW welding process to ASTM A 36 steel with a 60̊ V angle seam. The variations of the currents used in this welding process are 80,100 and 120 Amper. From the tests that have been done, it is known that the lowest hardness strength at current 80 produces a hardness value of 65.60 Hrc. Meanwhile, the highest hardness value at 100 Amper flow obtained a hardness value of 80.40 HRC
Pengaruh temperatur pelat landasan selama hot gas welding terhadap karakteristik kekuatan lasan lembaran HDPE Agus Setiawan; Kris Witono; Riswan E.W. Susanto
Journal of Welding Technology Vol 2, No 2 (2020): Desember
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v2i2.2069

Abstract

Plastic material failures such as fractures or can be repaired by joining. In the industrial world, the joining of two or more plastic parts can be done with plastic welding technology, one of the methods of plastic welding is hot-gas welding (HGW). HGW is a welding process for plastic materials, but it is known that plastic materials have poor heat conductivity. The aim of this research is to improve the quality of plastic material joints, in this case HDPE sheets, and effect of the base plate temperature and hot-gas temperature on the strength and impact, as well as the interaction effect of the base plate temperature and hot-gas temperature on tensile and hit strength. The method used in data collection is data processing method using factorial DOE. The temperature variation of the base plate during the welding process (30° C, 70° C, 110° C and 150° C), as well as the temperature of the hot air flow from the hot-gun (250° C, 300° C, and 350° C). To obtain the data, it was carried out by tensile and hit tests using standard specimens, respectively ASTM D 638-03 and ASTM D 6110. From the research results, it was found that the ground temperature and hot air flow temperature of the hot gun during the hot gas welding process had an effect on the tensile strength and hit HDPE weld joints. Optimization of tensile strength and hitting strength, respectively 18.78 MPa and 0.018567 J/mm2 (85.65% and 89.74% of the strength of HDPE without joints), these values are obtained from the combination of an anvil plate temperature of 150° C and flow hot air hot gan 250° C.
Analisa pengaruh putaran spindel pada friction welding terhadap tensile strength Alumunium A6061 Teuku Haikal Derniawan; Nurdin Nurdin; Fakhriza Fakhriza
Journal of Welding Technology Vol 3, No 1 (2021): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v3i1.2034

Abstract

The welding process using the friction welding method uses friction energy which turns into heat to join two metals. The welding process that occurs on the touch surface of the two metals results in a larger welding area compared to other welding methods where the welding area is only at the contact edge of the metal being joined. With the welding area that is on the entire surface of the joined plane, it allows this type of friction welding joint to accept a greater torsional load, so that in its application friction welding is very suitable for use in the process of joining shafts and metal materials that have circular profiles. The purpose of this study was to determine the effect of spindle rotation on friction welding on the mechanical properties of welding joints on Aluminum 6061 material. Its mechanical properties include a tensile strength test, with variations in spindle rotation on a lathe using 6061 aluminum material. Based on the results of the tensile test at 1500 rpm where the maximum stress on the A1 sempel is 8.88 Kgf/mm2, A2 sempel 8.83 Kgf/mm2 and sempel A3 10,83 Kgf/mm2. And at 2500 rpm where the tensile strength of the B1 sample is 10.73 Kgf/mm2, the B2 sempel is 11.26 Kgf/mm2 and the B3 sempel is 8.20 Kgf/mm2. From the results of the tensile test, it was obtained that the strength of the 6061 Aluminium joint by the friction welding method was the highest yield strength of 5.8 kg/mm2 and a maximum tensile strength of 11.26 kg/mm2, and the raw material tensile strength was 12.6 kgf/mm2, the tensile strength of raw material and material after friction welding differs only slightly
Analisa cacat pengelasan SMAW pada material ST 45 menggunakan uji partikel magnetik dan ultrasonic test Firdaus Firdaus; Bukhari Bukhari
Journal of Welding Technology Vol 2, No 1 (2020): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v2i1.1953

Abstract

Tujuan dari penelitian ini untuk mendapatkan perbedaan pengaruh lebar cacat terhadap perkumpulan serbuk partikel magnetic, pengaruh kedalaman cacat terhadap perkumpulan serbuk magnetic partikel, dan untuk mengetahui seberapa kemampuan yoke AC dalam mendeteksi cacat dalam permukaan. Dengan cacat buatan jenis Incomplete Penetration (IP) dengan variasi root gap=0.05 mm, root gap=0.10 mm, dan root gap 0.15 mm, yang menggunakan uji magnetic partikel dengan metode basah. Plat yang di gunakan dalam penelitian ini adalah plat St45 dengan parameter plat . Dari hasil penelitian ini didapat bahwa yoke AC hanya mampu mendeteksi kedalaman cacat pada kedalaman ±0.8 mm dan perkumpulan serbuk magnetic partikel di pengaruhi olek lebar cacat dan kedalaman cacat pengelasan pada specimen.
Pengaruh durasi waktu pengelasan pada proses las gesek terhadap sifat mekanik material AISI 1045 Andi Suhendar; Mawardi Mawardi; Akhyar Ibrahim
Journal of Welding Technology Vol 2, No 2 (2020): Desember
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v2i2.2031

Abstract

Welding is an important process in the industrial world and is an integral part of industrial growth. One type of welding that exists today is friction welding. Friction welding technology is a method of solid state welding where the heat source is generated by two metals rubbing together without any added metal. The purpose of this research is to determine the effect of welding time on the mechanical properties of the AISI 1045 material. The method used is to combine heat and pressure without the two metals being properly connected. Next, vary the welding time for 1 minute, 1.5 minutes, and 2 minutes with a rotation of 2500 rpm. After performing friction welding, each specimen will be subjected to a tensile test. From the research data shows that the friction welding process using 1 minute has the highest tensile strength value, namely 709.44 Mpa, then followed by 1.5 minutes, namely 439.64 Mpa, and then followed by 2 minutes, namely 145 79 Mpa. And then for the average hardness value at 1 minute is 74.20 HRC in the stir zone area, then for 1.5 minutes the average hardness value is 68.90 HRC in the stir zone area. Meanwhile, in 2 minutes, the Rockwell hardness value was 67.00 HRC. From the results of the research data, it can be concluded that the magnitude of the rotation and welding time affect the mechanical properties of the welding results

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