Research on Welding Technology of the Belt Conveyor Roller

2012 ◽  
Vol 201-202 ◽  
pp. 1135-1138
Author(s):  
Hong Wei Chen ◽  
Rong Jie Wang
Keyword(s):  
Arc Welding ◽  
Welded Joint ◽  
Welding Process ◽  
Far Infrared ◽  
Welding Residual Stress ◽  
Gas Shielded Arc Welding ◽  
Belt Conveyor ◽  
Mixed Gas ◽  
Welding Technology ◽  
Conveyor Roller

In view of the fracturing occurred at the welded joint of the belt conveyor roller while being in use in a coal mine of Fujian Province, the paper analyses the roller’s structure and stress in the basis of the transmission principle. It explores the reasons of the fracturing problem, and then proposes method to improve the roller’s welding technology. These are the cause of the roller fracturing，which the tension of the belt is great, and the roller itself is not strong enough, and welding process of steel plate is poor, and welding quality is not high. Use CO2 and Ar mixed gas shielded arc welding to do backing weld, then use the welding method of automatic submerged arc welding. Finally the tempering to the welded joint part with the track-type far-infrared heater eliminate the welding residual stress. By actual use, it’s proved that the Welding Process Improvement is feasible, reasonable, reliable and practical.

Optimization of Argon Gas Metal Arc Welding Process Parameters with Regard to Tensile Strength for AISI 310 Stainless Steel Using Taguchi Technique

2022 ◽  
Vol 58 ◽  
pp. 1-10
Author(s):  
Hanmant Virbhadra Shete ◽  
Sanket Dattatraya Gite
Keyword(s):  
Tensile Strength ◽  
Arc Welding ◽  
Welded Joint ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Taguchi Technique ◽  
Argon Gas ◽  
Metal Arc Welding ◽  
310 Stainless Steel ◽  
Arc Welding Process

Gas metal arc welding (GMAW) is the leading process in the development of arc welding process for higher productivity and quality. In this study, the effect of process parameters of argon gas welding on the strength of T type welded joint of AISI 310 stainless steel is analyzed. The Taguchi technique is used to develop the experimental matrix and tensile strength of the welded joint is measured using experimental method and finite element method. Optimization of input parameter is performed for the maximum tensile strength of welded joint using ANOVA. The results showed that welding speed is the most significant factor affecting the tensile strength followed by voltage in argon gas metal arc welding (AGMAW) process. Argon gas welding process performance with regard to the tensile strength is optimized at voltage: 18.5 V, wire feed speed: 63 m/min and welding speed: 0.36 m/min.

scholarly journals Contributions Regarding the Use of Mechanical Vibrations in Order to Improve the Properties of Steels and Welded Joints Used in Metal Constructions

2020 ◽  
Vol 21 (2) ◽  
pp. 67-71
Author(s):  
Gheorghe Novac ◽  
Bogdan Novac
Keyword(s):  
Welded Joints ◽  
Arc Welding ◽  
Significant Contribution ◽  
Welding Process ◽  
Internal Stresses ◽  
Welding Equipment ◽  
Welding Technology ◽  
Submerged Arc ◽  
Very High

The paper presents aspects regarding the influence of vibrations on the mechanical properties of welded joints, made with basic materials of Spanish and Romanian origin. In this research is presented the practical way to make the necessary assemblies for the proposed tests. The tests show that vibrations have a significant contribution to the quality of welded joints. This is explained by the appearance of several crystallization centres which makes the structure finer. By using vibrations, the atoms are rearranged in the structure, ensuring a proper de-tensioning. The stresses induced in welded metals are significantly reduced by the use of vibration during welding process. The addition materials have a significant contribution to the emergence of stresses in welded joints as well. These stresses can contribute to the appearance of microstructural constituents with significant hardness. The welding equipment and technologies used also have a significant contribution to the emergence of the remaining stresses. For example, the submerged arc welding technology (SAF) can introduce very high internal stresses. By using vibrations during the welding process, it is achieved a fine structure and a significant reduction of remaining stresses in the welded joints.

scholarly journals Influence of welding method on microstructural creation of welded joints  

2011 ◽  
Vol 57 (Special Issue) ◽  
pp. S50-S56 ◽  
Author(s):  
P. Čičo ◽  
D. Kalincová ◽  
M. Kotus
Keyword(s):  
Welded Joints ◽  
Arc Welding ◽  
Welded Joint ◽  
Gas Metal Arc Welding ◽  
Structural Phase ◽  
Welding Parameters ◽  
Welding Method ◽  
Welding Technology ◽  
Metal Arc Welding

This paper is focused on the analysis of the welding technology influence on the microstructure production and quality of the welded joint. Steel of class STN 41 1375 was selected for the experiment, the samples were welded by arc welding including two methods: a manual one by coated electrode and gas metal arc welding method. Macro and microstructural analyses of the experimental welded joints confirmed that the welding parameters affected the welded joint structure in terms of the grain size and character of the structural phase.

Welding Technology Research for the Train Bogie

2013 ◽  
Vol 423-426 ◽  
pp. 784-787
Author(s):  
Gang Wang ◽  
Zhi Gang Chen
Keyword(s):  
High Resistance ◽  
Weld Joint ◽  
Welded Joint ◽  
Welding Process ◽  
Technology Research ◽  
Process Scheme ◽  
High Quality ◽  
Process Testing ◽  
Welding Technology ◽  
High Fatigue

Train bogie weld joint requirements with well toughness, high fatigue resistance and high resistance to overload. This article analied the weldability of SMA490BW steel, Combining with the characteristics of train bogie structure, a welding process scheme which had been used in practical productionwas worked out . Process testing and assessment results showed the process can obtain high quality welded joint.

Testing of Welded Joints between Pipes for Pressure Vessels Made of Hot Rolled Fine-Grained Steel P460NL1

2020 ◽  
Vol 1157 ◽  
pp. 15-20
Author(s):  
Miodrag Arsić ◽  
Srđan Bošnjak ◽  
Vencislav Grabulov ◽  
Mladen Mladenović ◽  
Zoran Savić
Keyword(s):  
Tensile Properties ◽  
Welded Joints ◽  
Arc Welding ◽  
Welded Joint ◽  
Welding Process ◽  
Pressure Vessels ◽  
Parent Material ◽  
Fine Grained ◽  
Hot Rolled ◽  
Material Standard

This paper contains results of tests performed in order to determine mechanical properties of steel P460NL1, used as filler material during the execution of welded joints. Arc welding of samples from which the specimens were taken was carried out through the application of welding process 111, because it is one of the processes for the execution of pipelines for pressure equipment. Microspecimens with diameter of Ø1,5 mm were tested in order to determine tensile properties of material taken from the heat-affected zone and weld metal, while specimens with diameter of Ø6 mm were tested in order to determine tensile properties of parent material. Standard Charpy V-notch specimens were used in order to determine impact energy. Results of metallographic tests which refer to the structure of a pipe welded joint are also presented.

scholarly journals Characterization of Oxide Growth on Surface of Al-Mg-Si Welded Joint

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Azman Jalar ◽  
Nur Azida Che Lah ◽  
Norinsan Kamil Othman ◽  
Roslinda Shamsudin ◽  
Abdul Razak Daud ◽  
...  
Keyword(s):  
Arc Welding ◽  
Filler Metal ◽  
Welded Joint ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Al Alloy ◽  
Oxide Growth ◽  
Metal Arc Welding ◽  
The Difference

Al-Mg-Si (AA6061) Al alloy plates were joined by the method of gas metal arc welding using Al-5Mg (ER5356) filler metal and were subjected to the oxidation test in flowing air environment at600∘Cfrom 8 to 40 hours and the weight gain was measured. The characteristic of oxide grown on welded zone surface was examined by SEM/EDS, XRD, and XPS. Oxide was observed to grow on the fused metal surface suggesting the possibility of modifying the oxide chemistry under high temperature environment. It was found that the oxidation behavior of fused metal affected by the nature of their oxide growth and morphology, was influenced by their welding process and the difference in the chemical composition.

scholarly journals Strain Effect On Microstructural Properties Of SUS 304L Joint By PAW+GTAW

2021 ◽  
Author(s):  
Juan Wang ◽  
Yajiang Li ◽  
Qi Wang ◽  
Kun Liu ◽  
Hang Li
Keyword(s):  
Arc Welding ◽  
Room Temperature ◽  
Welded Joint ◽  
Welding Process ◽  
Strain Effect ◽  
304L Stainless Steel ◽  
Plasma Arc Welding ◽  
Microstructural Properties ◽  
Gas Tungsten Arc ◽  
Static Tensile

Abstract 304L stainless steel was joined by a combination welding process of plasma arc welding and gas tungsten arc welding (PAW + GTAW). Then pre-strain treatment on 304L welded joint by 9% was carried out using uniaxial static tensile at room temperature. Effect of strain on microstructure evolution in joint was analyzed by field emission scanning electron microscope (FESEM) and on mechanical properties was also studied. The results indicated that the strain rate of 304L joint showed inhomogeneity including 3% in the weld metal and 13% in the heat affected zone (HAZ), which induced martensitic transformation occurring in HAZ. Tensile strength of the joint increased from 700MPa as welded to 804MPa after strain at room temperature and it reached 1700MPa from 1480MPa at low temperature of -196℃. Impact toughness in HAZ was the least among the whole joint, but it was still 94J at -196℃after strain. The fracture surface showed large numbered of cleavage steps with elongated parabolic dimples.

scholarly journals Study on temperature- microstructure- stress fields of thick-walled plate welded by hybrid laser arc welding

2021 ◽  
Vol 2083 (2) ◽  
pp. 022075
Author(s):  
Hongjie Zhang ◽  
Tao Han ◽  
Yong Wang ◽  
Bangyu Wang ◽  
Guangxue Chen
Keyword(s):  
Arc Welding ◽  
Laser Energy ◽  
Welding Process ◽  
Welding Residual Stress ◽  
Stress Fields ◽  
Deep Penetration ◽  
Bead Width ◽  
Hybrid Laser Arc Welding ◽  
Weld Profile ◽  
Welding Procedure

Abstract The 25mm DH36 steel was welded by hybrid laser arc welding (HLAW), and a sequence coupled thermal-metallurgical-mechanical (TMM) model was developed based on SYSWELD. The temperature-microstructure-stress fields are predicted by simulation verified by experiment. The ratio between the arc and laser energy showed a significant effect on weld profile. The laser provided the main power and ensured deep penetration, and the arc power showed a dominant effect on the bead width of the hybrid weld during HLAW. For the hybrid welding of a thick-walled plate, the microstructure and thermal cycles varied along with the thickness. The weld profile and microstructure were experimentally characterized. The 3-pass welding procedure produced larger welding residual stress than the 9-pass welding procedure, and the process stability is poorer than the 3-pass welding process. Overall, numerical results matched well with experimental results.

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