Journal of the Association of Engineers, India

D. Sarder ¹, P. Sarkar ¹, S. Sarkar ¹, S. Ray ¹

Affiliations
1 Bengal Engineering and Science University, Howrah-3, IN

Abstract

Metallurgy of welding is very important because the overall mechanical porperties of weldment are determined by the characteristic properties of the individual microstructure present in the weld deposit. This paper deals with study of the metallurgy of fusion zone in regard to carbon content and its effect on hardness.

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S. Bhowmik ¹, S. Ray ²

Affiliations
1 B.E. College(D.U), Howrah-711103, IN
2 B. E. & SC. University, Howrah-711103, IN

Abstract

This paper deals with study of the effects of welding speed and welding heat on depth of heat affected zone and penetration in single run submerged arc automatic square butt welding. From the results it is established that the present work is an attempt to identify optimized processing parameters for successful welding in SAAW method.

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S. Roy ¹, D. Ray ¹, S. Saha ¹, B. Chowdhury ¹, S. Ray ²

Affiliations
1 B.E. College (D.U.), How-3, IN
2 B.E. College (D.U.), Howrah-711103, IN

Abstract

In the present investigation an attempt has been made to study the effects of welding parameters on hardness of weld deposited by submerged arc welding.

Hardness of the welds have been studied with respect to the variation in welding voltage, current and speed.

It has been found that for a definite combination of the welding parameters maximum hardness is achievable.

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G. Ghosh ¹, S. Ray ¹

Affiliations
1 Department of Mechanical Engineering, B. E. College, Howrah-711103, IN

Abstract

In the present study an attempt has been made to investigate the effects of welding beat on some of the mechanical as well as metalilurgical properties of weldments in the heat affected zones.

To achieve the objectives five welded samples fabricated from hot rolled structural steels (carbon varying from 0.15% to 0.22%) plates (10 mm thick) have been experimented with. The samples are of single V-butt joint, manually arc welded, using multiple runs.

Using polynomial regression analysis the best-fit equations have been obtained to find the inter-relationships of : 

1) hardness (F) with grain size (S), impact energy value (E), heat input per unit length of weld (H) and percentage carbon (C).

ii) impact energy value (E) with heat input per unit length of weld (H) and percentage carbon (C).

iii) grain size (S)with heat input per unit length of weld (H).

iv) percentage carbon (G) with heat input pet unit length of weld (H).

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K. C. Das ¹, A. K. Majumder ², S. Ray ²

Affiliations
1 Department of Mechanical Engineering, B. E. College, Howrah-3, IN
2 Department of Mechanical Engineering, B. E. College, Howrah-3, IN

Abstract

A Spark Erosion Machine from an indegineous design and in house resources has been designed and fabricated. The methodology has been explained in the present paper.

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S. Ray ¹, M. Bhattacharyya ²

Affiliations
1 Mech. Engg. of B. E. College, Shibpur, IN
2 Mech. Engg. of Jadavpur University, Calcutta, IN

Abstract

In the present study an attempt has been made to find out some correlation between the residual stresses with various welding parameters using dimensional analysis. The equations thus derived when used for finding out the residual stresses yield results which are in reasonable agreement with the measured ones for all practical purposes.

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A. C. Verma ¹, M. Bhattacharyya ², S. Ray ³

Affiliations
1 Jadavpur University, IN
2 Jadavpur University, Calcutta, IN
3 Bengal Engineering College, Sibpore, Howrah, IN

Abstract

In the present work an attempt has been made to determine residual stresses in weldments both by a non destructive non-conventional method based on directional hardness (indentation method) testing and by the destructive conventional method of stress relaxation. Residual stresses thus obtained in both the methods are compared; the causes of variation of stresses are explained.

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S. Ray ¹, N. R. Chakraborty ¹, R. N. Saha ²

Affiliations
1 Department of Mechanical Engineering, B. E. College, Howrah-3, West Bengal, IN
2 Deptt. of Mechanical Engineering, B. E. College, Howrah-3, West Bengal, IN

Abstract

This paper presents the design, construction and calibration of a Bonded-type of Strain-gauged Accelerometer.

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P. Gon ¹, S. Ray ²

Affiliations
1 Central Engineering and Design Bureau, Hindustan Steel Ltd., Bhilai, IN
2 I. I. T., Kharagpur, IN

Abstract

The deleterious effect of delayed expansion of MgO present in Portland Cement led to the introduction of limits for total MgO content in cement specifications, all over the world. In manufacturing Portland Cement with limiting MgO content of 6.0% as per Indian Standard, only limestone of high quality (low magnesia) can be used. But in our country the reserve of low magnesia limestone is limited and hence for proper quality of limestone raising for cement production, the quarry operations have to be done with much care involving rejection of dolomite stones and hence the cost goes up.

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