Journal of the Association of Engineers, India

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Investigation into Correlations of Weld-Hardness with Heat Input Rate for Arc Welded Butt Joints


Affiliations
1 Mechanical Engineering, Bengal Engg. and Science University, Shibpur, Howrah-3, India
2 Mechanical Engineering, Jadavpur University, Kolkata-700032,, India
     

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An attempt has been made to establish the correlations of weld-hardness with heat input rate using standard statistical techniques of regression analysis. To achieve the objective, 24 welded samples fabricated from hot rolled structural steel (carbon percentage varying from 0.17 to 0.22) plates (10 and 12mm thick) were used in the experiment. The samples were rectangular plates (750mm x 600mm x 10-12mm), single-V butt joint, manully arc welded, using multiple runs.

The best-fit equations thus obtained can be used to predict the weld-hardness corresponding to the least value of heat input rate, the weldments being as sound as the base metal.


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  • Investigation into Correlations of Weld-Hardness with Heat Input Rate for Arc Welded Butt Joints

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Authors

S. Roy
Mechanical Engineering, Bengal Engg. and Science University, Shibpur, Howrah-3, India
M. Bhattacharyya
Mechanical Engineering, Jadavpur University, Kolkata-700032,, India

Abstract


An attempt has been made to establish the correlations of weld-hardness with heat input rate using standard statistical techniques of regression analysis. To achieve the objective, 24 welded samples fabricated from hot rolled structural steel (carbon percentage varying from 0.17 to 0.22) plates (10 and 12mm thick) were used in the experiment. The samples were rectangular plates (750mm x 600mm x 10-12mm), single-V butt joint, manully arc welded, using multiple runs.

The best-fit equations thus obtained can be used to predict the weld-hardness corresponding to the least value of heat input rate, the weldments being as sound as the base metal.