Cold Cracking of Flux Cored Arc Welded Armour Grade High Strength Steel Weldments

J Mater Sci Technol ›› 2009, Vol. 25 ›› Issue (04): 516-526.

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Cold Cracking of Flux Cored Arc Welded Armour Grade High Strength Steel Weldments

G. Magudeeswaran ^1)†, V. Balasubramanian²⁾, G. Madhusudhan Reddy³⁾

1) Metal Joining Research Center (MJRC), Sri Ramakrishna Engineering College, NGGO Colony-Post, Coimbatore-641 022, Tamilnadu, India
2) Centre for Materials Joining & Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar−608 002, Tamilnadu, India
3) Metal Joining Section, Defence Metallurgical Research Laboratory (DMRL), Kanchanbagh (P.O.), Hyderabad-560 058, Andhra Pradesh, India

Received:2008-02-25 Revised:2008-08-27 Online:2009-07-28 Published:2009-10-10
Contact: G. Magudeeswaran

Abstract

Abstract:

In this investigation, an attempt has been made to study the influence of welding consumables on the factors that influence cold cracking of armour grade quenched and tempered (Q&T) steel welds. Flux cored arc welding (FCAW) process were used making welds using austenitic stainless steel (ASS) and low hydrogen ferritic steel (LHF) consumables. The diffusible hydrogen levels in the weld metal of the ASS and LHF consumables were determined by mercury method. Residual stresses were evaluated using X-ray stress analyzer and implant test was carried out to study the cold cracking of the welds. Results indicate that ASS welds offer a greater resistance to cold cracking of armour grade Q&T steel welds.

Key words: Quenched and tempered steel, Flux cored arc welding process, Weld cold cracking, Implant testing

G. Magudeeswaran,V. Balasubramanian,G. Madhusudhan Reddy. Cold Cracking of Flux Cored Arc Welded Armour Grade High Strength Steel Weldments[J]. J Mater Sci Technol, 2009, 25(04): 516-526.

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Cold Cracking of Flux Cored Arc Welded Armour Grade High Strength Steel Weldments

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