scholarly journals THE EFFECT OF VARIATION OF ELECTRIC CURRENT ON MICRO STRUCTURE AND HARDNESS IN SS400 STEEL WELDING PROCESS USING THE SMAW METHOD

2019 ◽  
Vol 1 (2) ◽  
pp. 81
Author(s):  
Irfan Adi Wibowo ◽  
Suharno Suharno ◽  
Indah Widiastuti
Keyword(s):  
Alloy Steel ◽  
Arc Welding ◽  
Comparative Research ◽  
Welding Process ◽  
Raw Material ◽  
Shielded Metal Arc Welding ◽  
Hardness Level ◽  
Hardness Tester ◽  
Metal Arc Welding ◽  
Ferrite Structure

<p>The objective of research was to find out the effect of current on microstructure and hardness value in Alloy Steel SS400 before (raw material) and after welding using Shielded Metal Arc Welding (SMAW).</p><p>This research uses experiment methods. Technique of analyzing data used was a descriptive comparative research. The instruments used for testing microstructure and hardness were Olympus Metallurgical Microscope and Vickers Hardness Tester.</p><p>Base on the result of research, it could be concluded that the result of microstructure testing showed the improved  ferrite structure after welding. In raw material, ferrite structure seemed to looks evenly, but the result of welding using SMAW welding method with current of I20 A, 130 A, and 140A showed that ferrite structure reduced in each specimen, so that  perlite structure was very dominant. The hardness value of hardness result showed the different hardness level. The specimen with current of 140 A had higher hardness level of 231,055 VHN than the specimen with current of 120 A (219.222 VHN) and 130 A (223,333 VHN). The result of hardness testing on raw material was 182,333 VHN. This research showed that the welding using varying current changed microstructure and affected the hardness value of Alloy Steel SS400.</p>

scholarly journals THE EFFECT OF CURRENT VARIATION ON MICRO STRUCTURE AND HARDNESS IN ALLOYSTEEL SS400 WELDING PROCESS USING SMAW METHOD

2019 ◽  
Vol 2 (1) ◽  
pp. 8
Author(s):  
Irfan Adi Wibowo
Keyword(s):  
Alloy Steel ◽  
Comparative Research ◽  
Welding Process ◽  
Raw Material ◽  
Shielded Metal Arc Welding ◽  
Hardness Level ◽  
Hardness Tester ◽  
Metal Arc Welding ◽  
Ferrite Structure ◽  
Current Variation

This research aims to find out the effect of current on microstructure and hardness value in Alloy Steel SS400 before (raw material) and after welding using Shielded Metal Arc Welding (SMAW). This research uses experiment methods. Technique of analyzing data used was a descriptive comparative research. The instruments used for testing microstructure and hardness were Olympus Metallurgical Microscope and Vikers Hardness Tester. Base on the result of research, it could be concluded that the result of microstructure testing showed the improved  ferrite structure after welding. In raw material, ferrite structure seemed to looks evenly, but the result of welding using SMAW welding method with current of I20 A, 130 A, and 140A showed that ferrite structure reduced in each specimen, so that  perlite structure was very dominant. The hardness value of hardness result showed the different hardness level. The specimen with current of 140 A had higher hardness level of 231,055 VHN than the specimen with current of 120 A (219.222 VHN) and 130 A (223,333 VHN). The result of hardness testing on raw material was 182,333 VHN. This research showed that the welding using varying current changed microstructure and affected the hardness value of Alloy Steel SS400.

scholarly journals STRUKTUR MIKRO DAN KEKERASAN BAJA S45C PADA PENGELASAN SMAW DENGAN VARIASI MEDIA QUENCH

2019 ◽  
Vol 12 (1) ◽  
pp. 30
Author(s):  
Nizam Effendi
Keyword(s):  
Comparative Research ◽  
Raw Material ◽  
Shielded Metal Arc Welding ◽  
Hardness Tester ◽  
Quenching Media ◽  
Average Hardness ◽  
Metal Arc Welding ◽  
Experiment Method ◽  
Water Media ◽  
Martensite Structure

<p>The purpose of this research is to find out the effect of current on microstructure and hardness value in S45C steel before (raw material) and after welding using Shielded Metal Arc Welding (SMAW). This research using experiment method. The Technique of data analysis using descriptive comparative research. The instruments that used for testing microstructure and hardness is Olympus Metallurgical Microscope and Vickers Hardness Tester. Based on the results of the research conclude that (1) the results of the microstructure testing showed the improved martensite structure after welding. In the raw material, martensite structure didn’t exist but the result of SMAW welding methods using quenching media of water, oil, and air that showed martensite structure was exist. (2) The hardness value of raw material is 232 VHN. The specimen with water media had highest average hardness value that is 411 VHN, oil media had average hardness value that is 308 VHN, air media had lowest average hardness value that is 263 VHN. This research showed that the result of SMAW welding using varying quenching media can changed the microstructure and hardness of S45C steel.</p>

scholarly journals THE EFFECT OF QUENCHING MEDIA VARIATIONS ON MICRO STRUCTURE AND VIOLENCE OF THE S45C STEEL STEEL WELDING RESULTS

2019 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Bagus Supriyadi Nur Haq
Keyword(s):  
Comparative Research ◽  
Raw Material ◽  
Shielded Metal Arc Welding ◽  
Hardness Tester ◽  
Quenching Media ◽  
Average Hardness ◽  
Metal Arc Welding ◽  
Experiment Method ◽  
Water Media ◽  
Martensite Structure

The purpose of this research is to find out the effect of current on microstructure and hardness value in S45C steel before (raw material) and after welding using Shielded Metal Arc Welding (SMAW). This research using experiment method. The Technique of data analysis using descriptive comparative research. The instruments that used for testing microstructure and hardness is Olympus Metallurgical Microscope and Vickers Hardness Tester. Based on the results of the research conclude that (1) the results of the microstructure testing showed the improved martensite structure after welding. In the raw material, martensite structure didn’t exist but the result of SMAW welding methods using quenching media of water, oil, and air that showed martensite structure was exist. (2) The hardness value of raw material is 232 VHN. The specimen with water media had highest average hardness value that is 411 VHN, oil media had average hardness value that is 308 VHN, air media had lowest average hardness value that is 263 VHN. This research showed that the result of SMAW welding using varying quenching media can changed the microstructure and hardness of S45C steel.

scholarly journals Evaluation of the quality of the shielded metal arc welding process using speckle interferometry

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Felipe Maia Prado ◽  
Daniel José Toffoli ◽  
Sidney Leal Da Silva
Keyword(s):  
Arc Welding ◽  
Speckle Pattern ◽  
Welding Process ◽  
Time History ◽  
Speckle Interferometry ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Properties Of Materials ◽  
Arc Welding Process

Speckle, which is a branch of optics that studies the interference pattern caused by the incidence of coherent light in a material’s surface, has some optical techniques and methods that can be successfully applied to determine properties of materials. In this work we used the method called THSP, Time History Speckle Pattern, in samples made of AISI 1020 carbon steel that were submitted to the shielded metal arc welding (SMAW) process, with the objective of identifying (qualitatively) the level of irregularity on its welded surface, by comparing these samples with a default sample, made with the same material. The technique of spekle by reflection was used for data collection. The results showed quantitative diferences between the default welded sample and the other samples, and there are good perspectives that speckle can be applied to determine the quality of the welding process, since the results showed more accuracy than visual inspection.  

A Study of Software Approach for Predicting Weld Bead Geometry in Shielded Metal Arc Welding (SMAW) Process

2014 ◽  
Vol 554 ◽  
pp. 386-390
Author(s):  
C.W. Mohd Noor ◽  
Manuhutu Ferry ◽  
W.B. Wan Nik
Keyword(s):  
Arc Welding ◽  
Welding Process ◽  
Weld Bead ◽  
Bead Geometry ◽  
Shielded Metal Arc Welding ◽  
Depth Of Penetration ◽  
Weld Bead Geometry ◽  
Bead Width ◽  
Real Process ◽  
Metal Arc Welding

The prediction of the optimal weld bead width is an important aspect in shielded metal arc welding (SMAW) process as it is related to the strength of the weld. This paper focuses on investigation of the development of the simple and accurate model for prediction of weld bead geometry. The experiment used welding current, arc length, welding speed, welding gap and electrode diameter as input parameters. While output parameters are bead width, depth of penetration and weld reinforcement. A number of 33 mild steel plate specimens had undergone the SMAW welding process. The experimental data was used to develop mathematical models using SPSS software. The actual and predicted values of the weld bead geometry are compared. The proposed models shows positive correlation to the real process.

Strategies for Controlling Welding Fumes at the Source - A Review

2014 ◽  
Vol 592-594 ◽  
pp. 2539-2545 ◽  
Author(s):  
Sreejith Mohan ◽  
S.P. Sivapirakasham ◽  
P. Bineesh ◽  
K. K. Satpathy
Keyword(s):  
Arc Welding ◽  
Control Strategies ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Detailed Knowledge ◽  
Welding Fumes ◽  
Shielded Metal Arc Welding ◽  
Factors Affecting ◽  
Metal Arc Welding ◽  
New Research

Exposure to welding fumes and its related hazards has always been a matter of serious concern. The mass and composition of fumes from welding depends on several factors. A detailed knowledge of these factors is necessary for understanding the mechanism of fume formation and developing suitable control strategies. This paper gives a literature overview on the various factors affecting welding fumes and strategies for controlling it. The paper focus on types of welding process like Manual Metal Arc Welding (MMAW) or Shielded Metal Arc Welding (SMAW), Gas Metal Arc Welding (GMAW), Flux Core Arc Welding (FCAW), Gas and Tungsten Arc Welding (GTAW). The research in the area of controlling fumes at the source has grown rapidly recently. Still, effective methods have hardly been explored. Improving arc stability by addition of materials with low ionization potential to the welding electrode lead to promising new research directions.

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