Effect of Niobium Content on Laminar Precipitate and High Temperature Mechanical Properties of 21-2N Valve Steel

Shi Chang Cheng; Zheng Dong Liu; Zhao Jie Lin; Han Sheng Bao

doi:10.4028/www.scientific.net/MSF.654-656.182

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Effect of Niobium Content on Laminar Precipitate and High Temperature Mechanical Properties of 21-2N Valve Steel
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The Effect of Temperature on the Tensile Properties of Steel 0Cr18Ni9
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HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Effect of Niobium Content on Laminar Precipitate...

Effect of Niobium Content on Laminar Precipitate and High Temperature Mechanical Properties of 21-2N Valve Steel

Abstract:

Effect of niobium content on laminar precipitate and high temperature mechanical properties of 21-2N vavle steel was systematically studied, using specimens contain 0.26%, 0.43%, 0.65% 0.82% and 1.06% Nb. After different solid solution treatment and 750 °C aging heat treatment, experimental results showed that laminar precipitate was suppressed by niobium addition, and with the increasing of niobium content, laminar precipitate content decreased and size, distribution and morphology of laminar precipitate was meliorated. Then creep rupture strength and fatigue strength of experimental steels are improved with increasing of niobium.