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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 6, No 2 (2024): December" : 5 Documents clear
Comparative analysis of electrode, preheat, and interpass combination in dissimilar GMAW welding of bisalloy 400 steel and SM490YA material on hardness and micro structure Munir, Moh. Miftachul; Kusminah, Imah Luluk; Kamilah, Nadhifatul
Journal of Welding Technology Vol 6, No 2 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v6i2.5942

Abstract

A construction company produced a side-dump type trailer used to transport coal, but it suffered damage in the form of cracks in the welding joints on the floor. The weld joint uses two different materials, Bissalloy 400 and SM490YA steel. This study aims to analyze the damage and repair it using appropriate electrodes, preheating, and interpass temperature, which affect the hardness and microstructure of both materials. The hardness test results showed that the highest value reached 385 HVN. Increasing the preheat and interpass temperatures was found to decrease the material's hardness. Microstructure analysis revealed phase changes in the weld metal, including mixing of martensite phase, ferrite phase, and pearlite phase. The use of a buffer layer between dissimilar materials proved effective in reducing the risk of cracking and deformation. This research confirms the importance of selecting appropriate welding parameters to improve joint quality in materials with significant carbon equivalent differences.
Analysis of mechanical properties on API 5CT pipe casing welded using GTAW- SMAW process Syukran, Syukran; Azwinur, Azwinur; Fachrurrazi, Fachrurrazi
Journal of Welding Technology Vol 6, No 2 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v6i2.5961

Abstract

The drilling process commonly employs API 5CT pipes, one type of which is API 5CT Casing Pipe Grade L80 Type-1. Long casing pipes are generally connected using the Threaded and Coupled (male-female) method. In certain conditions, welding is used for joining, and the combination welding process GTAW-SMAW is commonly employed in the field. The electrodes used are generally ER-70S-G (GTAW) and E7010-P1 (SMAW). The E7010-P1 electrode is difficult to obtain in the field. It is not only expensive but also scarce. Therefore, in some cases, construction contractors often substitute the E7010-P1 electrode with E7016, which is more readily available. This substitution is based on the consideration that both electrodes have similar tensile strength values (70ksi). This study aims to determine the mechanical properties of the joint process of API 5CT Casing Pipe Grade L80 Type-1 using E7016 electrodes and to evaluate the feasibility of substituting it for the E7010-P1 electrode. NDT testing was performed using a penetrant test, while DT testing was carried out using Vickers Hardness testing. The hardness test results showed that the highest average hardness value was found in the material using the E7016 electrode, which was 304 HVN, specifically in the weld metal area. Based on these results, E7016 can be recommended as a substitute for the E7010-P1 electrode.
The effect of welding current on the mechanical properties of aluminium to copper material using Tungsten Innert Gas welding technology Azwinur, Azwinur; Saifuddin, Saifuddin; Saputra, Rudi Mardian
Journal of Welding Technology Vol 6, No 2 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v6i2.6059

Abstract

Welding copper and aluminium is a major challenge due to the differences in physical and metallurgical properties of the two materials. Copper has a much higher melting point than aluminium, making it difficult to achieve uniform fusion without overheating. In addition, copper's very high thermal conductivity causes rapid heat transfer, making it difficult to maintain optimal temperatures during welding. The purpose of this study was to determine the effect of TIG welding current on the shear test value and hardness of aluminium-copper material. The stages of the research method began with welding variations in welding current and filler rod types. Furthermore, shear and hardness tests were carried out. Based on the results of the hardness test, the hardness value of the welded material was higher than the parent material. The hardness value of the weld metal was higher at a current of 130A compared to currents of 120A and 140A. While the optimal welding current for copper and aluminium joints in shear test testing using BCuP-2 filler rods is 130 A, where the highest shear strength is achieved
Weldability of welded joint alloy steel grade 91 to stainless steel grade 316L using filler metal ER NiCrMo-3 and ER 309LMo in power boiler piping and tubing Kurniyanto, Hendri Budi; Rohmat, Imam Khoirul; Muh Sulhan, Ilham Ainur Rosyid; Marzuki, Marzuki
Journal of Welding Technology Vol 6, No 2 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v6i2.6096

Abstract

Welded joints between high alloy steel and austenitic stainless steel are commonly used in the power plant industry. In this research, the materials used were SA-335 P91 and 316L stainless steel with ERNiCrMo-3 and 309LMo fillers designed with a butt joint configuration. Several mechanical test (tensile test ASTM E8, Hardness Test ASTM E92) and microstructure examination was carried out to determine the tensile strength, hardness and microstructure of welded joint. The highest tensile strength is found in the ERNiCrMo-3 filler metal, namely 354.085 MPa, while the lowest is found in the 309LMo filler metal, namely 349.87 MPa. The highest hardness values for the ERNiCrMo-3 filler metal are found in base metal P91, HAZ P91, weld metal, HAZ stainless steel 316L, and base metal stainless steel 316L, with values respectively 212.77 HVN, 278 HVN, 239.53 HVN , 189.32 HVN, and 180.40 HVN. The lowest values for the 309LMo filler metal are 210.13 HVN, 266.12 HVN, 206.48 HVN, 175.59 HVN, and 172.32 HVN. Microstructural observations show the formation of a dendrite phase in the weld metal area with ERNiCrMo-3 filler metal and a delta ferrite phase in the weld metal area with 309LMo filler metal. No phase changes were observed in the P91 base metal, P91 HAZ, 316L stainless steel base metal, or 316L stainless steel HAZ areas. The results of the corrosion resistance test show that specimens with the ERNiCrMo-3 filler metal are more resistant to pitting corrosion compared to specimens with the 309LMo filler metal. The corrosion rate is 12,50 mm/years for ERNiCrMo-3, and 18,94 mm/years for 309LMo filler metal.
Analysis of welding time on microstructure, hardness, and torque of arc stud welding process Amri, Moh. Syaiful; Mukhlis, Mukhlis; Ari, Muhammad; Wibowo, Alvalo Toto; Isworo, Annas Dwi
Journal of Welding Technology Vol 6, No 2 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v6i2.5739

Abstract

The manufacturing industry plays an important role in improving the national economy. One of the metal joining methods currently used is arc stud welding. Stud welding is used for welding bolts, which are useful for connecting parts in steel structures. This research was conducted with variations in current strength parameters of 200A, with welding times of 1, 2, and 3 seconds. The purpose of this research is to find the best parameters to determine the depth of penetration, heat-affected zone, and fusion zone of welding joints in A36 material. Macro testing results show that there are no defects such as cracks in the base metal, HAZ, or weld metal, meeting the ASME Sec. IX acceptance requirements. In addition, since the heat input remained within acceptable limits in the base metal areas of A36 and SS 304, the microtest results did not show significant changes. In the hardness test, the weld metal region obtained the highest value. The lowest average value was 192.85 HVN in the stud 1 specimen, while the highest average value was 195.37 HVN in the stud 3 specimen. The torque test shows that variations in welding time affect the torque strength; in specimen 3, it ranges from 50 Nm to 80 Nm.

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