Weldability Assessment of Dual Phase Medium Carbon Low Allow Steel

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Author(s) Momoh I.M. | Dongo E.I. | Olusunle S.O.O. | Ogundare O.D.
Pages 569-573
Volume 1
Issue 11
Date November, 2012
Keywords Dual Phase Steel, Fusion Zone, Heat Affected Zone, Submerged Arc Welding, Intercritical treatment, Microhardness.
Abstract

The weldability of ultra high strength Dual Phase Steel (DPS) was investigated. DPS was developed by adoption of intercritical treatment technique and then welded using a Submerged Arc Welding (SAW) technique, following a conventional standard of pre heat treatment method. Microhardness and tensile tests were used to evaluate the mechanical properties; also the microstructures were also analyzed at different reaction points. It was observed from the results that, medium carbon low alloy steel, when intercritically heat treated and welded, possess significantly higher mechanical properties as compared to the conventional heat treated steel.

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