alexa Experimental Determination of Cooling Rate and its Effe
ISSN: 2169-0022

Journal of Material Sciences & Engineering
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Research Article

Experimental Determination of Cooling Rate and its Effect on Microhardness in Submerged Arc Welding of Mild Steel Plate (Grade c-25 as per IS 1570)

Rahul Kumar*, Harish K Arya and Saxena RK

Department of Mechanical Engineering, Sant Longowal Institute of Engineering and Technology, Longowal-148106, Punjab, India

*Corresponding Author:
Rahul Kumar
Department of Mechanical Engineering
Sant Longowal Institute of Engineering and Technology
Longowal-148106, Punjab, India
Tel: 01672-253123
E-mail: [email protected]

Received Date: February 07, 2014; Accepted Date: July 21, 2014; Published Date: August 08, 2014

Citation: Kumar R, Arya HK, Saxena RK (2014) Experimental Determination of Cooling Rate and its Effect on Microhardness in Submerged Arc Welding of Mild Steel Plate (Grade c-25 as per IS 1570). J Material Sci Eng 3:138. doi: 10.4172/2169-0022.1000138

Copyright: © 2014 Kumar R, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

An experiment based thermal analysis has been performed to obtain the thermal histories, which can be applied to determine cooling rate of weldment. During fusion welding process it is possible to determine temperature at any point by using thermocouple and from such data it is possible to draw thermal histories for any point of interest, such thermal histories can be utilized to determine cooling rate. The temperature distribution and cooling rate during the welding process have significant effect on the mechanical and metallurgical properties of a weldment. The changes in microstructure, grain growth and hardness in a weldment are very dependent on the temperature distribution and cooling rate. These studies are utilized to investigate the micro-structure and microhardness of the heat affected zone (HAZ) and weldment. In present work, the influence of heat input and cooling rate on microhardness has been investigated. Full factorial design is used to conduct the experiment with three factors and two levels. Eight combinations and two set of heat input are designed with different combinations of SAW welding parameters. Temperature distribution curves and cooling rate have been drawn. The effect of selected welding parameters (Wire feed rate, Open circuit Voltage and welding Speed) on the microhardness have been investigated.

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