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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 5 Documents
 1 
Search results for , issue "Vol 5, No 1 (2023): June" : 5 Documents clear
Effect of Shallow Cryogenıc Heat Treatment on Metal Inert Gas Weldıng Zone of S 355 J2 Steel Zafer Özdemir
Journal of Welding Technology Vol 5, No 1 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v5i1.3888

Abstract

Metal inert gas welding (MIG) is generally conducted in the pressure vessel industry due to its high quality and easy automation. S355 J2 steel is used widely in this industry for its proper welding properties. To carry out and obtain high melting efficiency for satisfactory mechanical properties according to welding parameters, sometimes heat treatment is applied to materials, but generally it is not common in welding industry. In this study the effect of conventional heat treatment and shallow cryogenic heat treatment effects to the mechanical properties of welding zone of S 355 J2 steel welded with MIG is investigated. The charpy impact tests have been carried out. The welding plate is prepared according to this purpose and it is cut for impact test samples 10 X 10 x 55 mm. Totally 30 samples are prepared for 5 processes. Process 1: 6 samples for without heat treatment. Process 2: 6 samples for normalization-quenching in water. Process 3: 6 samples for normalization-quenching-tempering. Process:4 6 samples for normalization-shallow cryogenic treatment. Process 5: 6 samples for normalization-shallow cryogenic treatment-tempering. Notch of impact test samples are prepared just in the middle of the welding zone (2 sample for each process) , HAZ (2 sample for each process) and basemetal (2 sample for each process). The hardness values are taken from base metal, heat affected zone and welding area respectively. Hardness values and impact test results are compared. As a result, generally, it has been observed that shallow cryogenic heat treatment have a remarkable effect on toughness, despite a little decrease in hardness. The toughness of welding zone is increased approximately %40 and HAZ % 5 after cryogenic heat treatment. The hardness of WZ is increased approximately % 5 after cryogenic heat treatment, no significant change is observed in HAZ.
Corrosion Rate Analysis on SA 240 TP 904L Material Experience Multiple Repair Muhammad Ari; Dika Anggara; Amar Sastra Adi
Journal of Welding Technology Vol 5, No 1 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v5i1.4019

Abstract

Weld imperfections are likely to arise during any welding process. Due to the enormous number of joints that could result in weld defects, welding process faults could happen. Repair procedures are required to address welding defects. Multiple repairs are required if welding mistakes are made repeatedly. The duplex material used in this study is SA 240 TP 904L. By altering the repair procedure treatment 1x, 3x, 5x, and without repair, the welding process is carried out utilizing the SMAW method and E309L filler. Microstructure testing, ferrite content testing, and 3-electrode cell corrosion are the test techniques used. The relationship between the corrosion rate and the amount of ferrite content was deduced from the test data. The corrosion rate increases as the ferrite content rises due to several repairs.
The Effect of Weld Current and Weld Time on the Push Test, Nugget and Penetration Depth of Steel Plate SPFC590 with Weld T-Nut M10 Ardhi Alfarizzi Tanjung; Budiarto Budiarto; Surjo Abadi
Journal of Welding Technology Vol 5, No 1 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v5i1.3651

Abstract

This study explains the effect of the parameters of current strength and welding time. The welding process uses SPFC590 t1.2 steel plate material and Weld T-Nut M10 with a 50 kVA Dagensha brand spot welding process. The purpose of this research is to analyze the push test, nugget, and depth of penetration against engineering standards from PT HMC (Hyundai Motor Company). Using the factorial experimental design method to convey test layout formulations, understand the best conditions for setting machine parameters, and knowing the performance effect of parameter settings such as push tests, nuggets, and depth of penetration spot welding. The results of the push test between the SPFC590 t1.2 steel plate and Weld T-Nut M10 are the largest 17.7 kN and the smallest 15.4 kN. the test results have passed the results of the 6.5 kN engineering standard. Test results on nuggets the longer the melting occurs the wider the growth of the melt, and after the part is at room temperature the melting zone will become a nugget, for the average nugget test result is 5.6 mm and has passed the standard engineering results. Whereas in the penetration test the longer the welding time the deeper the penetration depth. The results showed that the parameters of current strength and welding time can affect the results of the size of the nugget and the depth of penetration of spot welding, but can reduce the strength of the push test. besides that the less the remaining plate that is not affected by penetration the smaller the strength of the push test, and the less depth of penetration. The smaller the strength of the push test and the higher the current strength and welding time, the larger the nugget size obtained.
Hardness Analysis of Aluminium 5083 A-TIG Welding Due to The Effect of Active Flux and Current Eriek Widodo; Dika Anggara; Moch. Karim Al Amin; M. Idris Al Jawwad
Journal of Welding Technology Vol 5, No 1 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v5i1.3886

Abstract

Aluminium allow has been widely used recently due to their high strength to mass ratio, good formability and high corrosion resistance have a wide range of applications in aerospace, ship-building and railway industries. The 5083 series aluminum is the most widely used due to good strength and corrosion resistance properties. Tungsten Inert Gas Welding (TIG welding) is the most common welding method for aluminum alloys. This research was conducted A-TIG welding on 150 x 100 x 8 mm of 5083 aluminium and added by oxide powder (MgCl2 and TiO2) as active flux and various of current consist of 100, 130, and 160 A. The result of this research was obtained that the deepest penetration was 4.94 mm with TiO2 active flux and the current of 160 A, the highest hardness came from weld metal which using MgCl2 as an active flux with 100 A of current with 69.80 HVN. The hardness was increased by adding magnesium due to effect of it could be increased grain coarse. The lowest hardness was on weld metal with TiO2 active flux with 160 A of current due to the maximum heat input which decreased the hardness The recrystallization was occurred due to increase of heat input, so did the grain growth. The coarse grain which caused the decreasing of hardness was affected by the increase of heat input.
The Effect of Heat Input on the Tensile Strength and Toughness of welded SS400 Materials by SMAW Syukran Syukran; Alvi Syahri; Adi Saputra Ismy; Al Fathier Al Fathier; Fadhlurrahman Fadhlurrahman; Amrizal Amrizal
Journal of Welding Technology Vol 5, No 1 (2023): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v5i1.3508

Abstract

Joint materials using welding require the correct stages, starting from the design stage to the processing stage. The design stage starts from the selection of the type of welding, to the selection of the seam angle used. Meanwhile, at the processing stage, the current strength will be selected according to the processing position. The purpose of this study was to determine the effect of welding heat input on the mechanical strength of SS-400 steel in SMAW welding. In this study the material used was SS-400 with current variations of 90 A and 100 A. The results showed that the welding current affected the tensile strength and toughness of the material. The welding current of 100 A has the highest tensile strength and toughness, and then 90 A which has the lowest tensile strength and toughness, while the strain that occurs at current 90A is 13.53%, and the strain that occurs at current 100 A is 12.07%.

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