The Spot Weldability of Carbon Steel Sheet

A M Al-Mukhtar,Q Doos

doi:10.1155/2013/146896

Abstract

The specimens of thickness 0.8 mm carbon steel number 1.8902 in a strip form were welded. The strips of lap joints and curved peeljoints configurations have been welded. The welding parameters such as weld current and weld time have been investigated. The relation between the weld area and the joint strength properties has been presented. The obtained results were showing that the weld joint strength and the molten area (weld nugget volume) highly increase with the increasing of weld current. Therefore, the correlation between the maximum load (joint strength) and area has been given. The reliable weldability under the tensile and shearing loading was considered. Therefore, the new limits of weldability have been presented to consider these two types of loading. Moreover, the experimental results were compared with the empirical relations that consider the sheet thickness only.

Highlights

Resistance spot welding (RSW) is the most widely common method used for joining structures and plates of different materials
The obtained results were showing that the weld joint strength and the molten area highly increase with the increasing of weld current
The welding current has a major effect on the weld area and joint strength more than the weld time and electrode pressure

Summary

Introduction

Resistance spot welding (RSW) is the most widely common method used for joining structures and plates of different materials. This is because different joint configurations can be made. The desired reliability of these joints can be made. Up to date, more works are needed to investigate the materials, welding ability and the reliability of these joints under different loading. The easy producing of sound spot welds by the convention tensile tests has been determined in different works [1–6]. The weld strength and weld nugget area that are related to the spot-welding variables were investigated. Good spot-welding practice requires three parameters that have to be controlled, namely, current, time, and electrode pressure [3]

Objectives

Results

Conclusion