JOURNAL OF FACULTY OF ENGINEERING & TECHNOLOGY, Vol 19, No 1 (2012)

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Enhancement of Mechanical & Ballistic Properties of Quenched & Tempered (Q & T) High Strength Low Alloy (HSLA) Steel Weldments.

Dr. Khalid Mahmood Ghauri, Mr.Awais Iqbal, Dr. Liaqat Ali, Dr. Akhlaq Ahmad, Dr. Gul Hameed, Mr. Nazar Hussain

Abstract


HSLA (High Strength Low Alloy) Q & T (Quenched & Tempered) Steel Weldments  prone to number of Welding defects as regard to the Mechanical & Ballistic properties. In this investigation an attempt has been made to design such Welding methodology which gives sound Weldment by keeping the adequate Mechanical and Ballistic properties intact as well.Uptill now Hardfaced layer was deposited in between the ASS (Austenitic Stainless Steel) Welding layers of Q & T HSLA Steel Weldments for good Ballistic & Mechanical properties but this didn’t work well and cracks were observed in between Base metal and Hardfaced layer.This study was made ,as extracted from literature, to eliminate these cracks and defects by depositing soft buttering layer in between the Base Metal and Hardfaced layer and also utilized the newly recommended class of consumables ,i.e. LHF (Low Hydrogen Ferritic) as well.The said design methodology exhibited adequate results.

 



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Faculty of Engineering and Technology

University of the Punjab

Lahore-54590-Pakistan