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Modernistic Method of Enhancing Productivity by Reusing of Slag as Flux in Submerged Arc Welding & Study of its Impact on Mechanical Properties


Affiliations
1 University of North Carolina at Charlotte, United States
2 Department of Mechanical Engineering, Chaitanya Bharathi Institute of Technology (CBIT), Gandipet, Hyderabad, Telangana, India
     

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Submerged arc welding (SAW) is an industrial welding process in which the joint is obtained by heating the metal with an arc set between bare electrode and work piece. Intense heat produced during the process fuses the metal and filler metal. Flux is used as a shielding agent to protect the molten weld pool from atmospheric contamination. This flux gets converted into slag after solidification at the surface of welding metal. This slag is thrown away after performing welding. This leads to increase in the cost of process hence reuse of slag is a cost effective method. In this present work different flux and slag compositions are used to analyse the effect of slag & flux mixture on mechanical properties of submerged arc welded joint performed on mild steel plates. Further this work is an attempt to utilize the mixture of slag and flux and reduce the cost of SAW welding process. For the investigation, 6 different compositions of slag and flux are made by varying slag percentage in each sample starting from 0 % to 100 %. The different output parameters of interest are studied such as Penetration, Bead Width, Reinforcement, Microstructure, Tensile Strength and Hardness. The best slag composition which is inferred from the test results are found to be Composition No 2(20% Slag) & Composition No 3 (40% Slag).

Keywords

Submerged Arc Welding, Flux, Slag, Reuse of Slag, Cost Effective Method.
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  • Jatinger Garg; Amish Gupta; To Evaluate the Effect of Saw Parameters on Slag Content of Weld Metal, 'International Journal of Science and Technology' IJSN 123.45.

  • Dalgobind Mahto; Anjani Kumar: Novel Method of Productivity Improvement and Waste Reduction Through Recycling of Submerged Arc Welding Slag, 'Jordan Journal of Mechanical and Industrial Engg'. vol. 4, Sep 2010 , ISSN 1995-6665.

  • Sandeep Krishnan Kant; Mohit Bector; Anoop Verma: Reclamation of Slag as Flux Composition by the effect of welding parameters in Submerged Arc Welding.

  • Kulwant Singh , Handip Singh ‘ Bead Geometry with Crushed Slag in Submerged Arc Welding’ Journal of Manufacturing Engg, June 2011 , vol. 6, no. 2, 120-125.

  • Amit Gupta; Pawan Kumar Sapra; Naveen Singla; Gora Ram: Effect of Various Flux Compositions Mixed With Slag on Mech.Properties of Structural Steel Weld Using Submerged ARC Welding, 'Asian Review of Mechanical Engg' ISSN 2249 - 6289, vol. 2, no. 2, 2013, 27-31.

  • Jaswinder Singh; Kulwant Singh; Jatinger Garg: Reuse of Slag as Flux in Submerged Arc Welding & its Effect on Chemical Composition, Bead Geometry & Microstructure of the Weld Metal, 'Int J of Surface Engg & Materials Technology', vol. 1, no. 1, July-Dec, 2011, ISSN:2249-7250


Abstract Views: 186

PDF Views: 3




  • Modernistic Method of Enhancing Productivity by Reusing of Slag as Flux in Submerged Arc Welding & Study of its Impact on Mechanical Properties

Abstract Views: 186  |  PDF Views: 3

Authors

Sai Manish Reddy Mekarthy
University of North Carolina at Charlotte, United States
B. V. S. Rao
Department of Mechanical Engineering, Chaitanya Bharathi Institute of Technology (CBIT), Gandipet, Hyderabad, Telangana, India

Abstract


Submerged arc welding (SAW) is an industrial welding process in which the joint is obtained by heating the metal with an arc set between bare electrode and work piece. Intense heat produced during the process fuses the metal and filler metal. Flux is used as a shielding agent to protect the molten weld pool from atmospheric contamination. This flux gets converted into slag after solidification at the surface of welding metal. This slag is thrown away after performing welding. This leads to increase in the cost of process hence reuse of slag is a cost effective method. In this present work different flux and slag compositions are used to analyse the effect of slag & flux mixture on mechanical properties of submerged arc welded joint performed on mild steel plates. Further this work is an attempt to utilize the mixture of slag and flux and reduce the cost of SAW welding process. For the investigation, 6 different compositions of slag and flux are made by varying slag percentage in each sample starting from 0 % to 100 %. The different output parameters of interest are studied such as Penetration, Bead Width, Reinforcement, Microstructure, Tensile Strength and Hardness. The best slag composition which is inferred from the test results are found to be Composition No 2(20% Slag) & Composition No 3 (40% Slag).

Keywords


Submerged Arc Welding, Flux, Slag, Reuse of Slag, Cost Effective Method.

References