Effect of Boron or Cuprum on Phase Transition and Mechanical Properties of High-Strength Steels for Oil Tank

Abstract:

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Two kinds of oil tank steels were fabricated by added B(B-steel) and Cu(Cu-steel) , and their microstructures, tensile and Charpy impact properties, undercooled austenite transformation were investigated. In this work,0.0016%B can improve hardenability distinctly. The B-steel was mainly composed of bainite at the cooling rate of 3°Cs-1, but the Cu-steel completely consisted of bainite when the cooling rate exceed 20°Cs-1. The steels manufactured by thermo-mechanical controlled process , test results indicated that the B-steel had the higher yield and tensile strength than the Cu-steel ,because their volume fractions and morphologies of bainite. The Cu-steel had the higher impact energy than the B-steel because of their higher effective grain size. Majority of the precipitation particles which were compounded of Nb and Ti existed as(Nbx,Ti(1-x)) (CyN(1-y)).

Info:

Periodical:

Advanced Materials Research (Volumes 233-235)

Edited by:

Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He

Pages:

1063-1066

DOI:

10.4028/www.scientific.net/AMR.233-235.1063

Citation:

L. Qi et al., "Effect of Boron or Cuprum on Phase Transition and Mechanical Properties of High-Strength Steels for Oil Tank", Advanced Materials Research, Vols. 233-235, pp. 1063-1066, 2011

Online since:

May 2011

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$35.00

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