Development of low alloy ultrahigh strength steel

Maity, S K and Ballal, N B and Goldhahn, G and Kawalla, R (2008) Development of low alloy ultrahigh strength steel. Ironmaking & Steelmaking, 35 (3). pp. 228-240.

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Thermomechanical treatment (TMT) of plates is used to obtain the optimum combination of strength and toughness. Although this technique is applied to high strength low alloy (HSLA) steels, its application to ultrahigh strength steel (UHSS) is still under study. In this investigation, four C, Mn, Cr and Mo alloys, some with Nb or Ti additions, were prepared by electroslag refining (ESR), hot rolling with TMT and variations in cooling rate. Mechanical properties were evaluated and microstructural features were characterised. The oil cooled specimens of titanium alloy produced the optimum properties with higher strength values: ultimate tensile strength (UTS) = 52177 MPa, yield strength (YS) = 51795 MPa, elongation (El) = 58% and impact toughness = 713 kJ m(-2), with microstructures predominantly consisting of lath martensite.

Item Type:Article
Official URL/DOI:DOI: 10.1179/174328108X271493
Uncontrolled Keywords:themomechanical treatment; ultrahigh strength steel; cooling rate; microstructure; mechanical properties
Divisions:Metal Extraction and Forming
ID Code:3286
Deposited By:Sahu A K
Deposited On:13 Jul 2011 12:17
Last Modified:11 Aug 2015 12:56
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