Study on Microstructure and Property in Heat-Affected Zone of X80 Pipeline Steel

Xiang Dong Huo; Zhen Zhuo Tian; Lie Jun Li

doi:10.4028/www.scientific.net/AMR.941-944.142

Paper Titles

Prediction of TCP Phases in Nickel-Base Superalloys
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Bake Hardening Properties of Ultra-Rapid Annealed Ultra-Low Carbon Bake Hardening Steel
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Study on Internal Quality of Billets for 20CrMnTiH Steel
p.132

Study on Microstructure and Properties of X80 Pipeline Steel
p.138

Study on Microstructure and Property in Heat-Affected Zone of X80 Pipeline Steel
p.142

Thermal Simulation Study of CGHAZ Austenite Grain Growth Behavior of X80 Pipeline Steel
p.146

Research on Mechanics Performance of TP304H Austenitic Stainless Steel in the Process of Aging at High Temperature
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Experimental Study on Hydrogen Selective-Reduction of Niobium Containing Iron Ore Powder
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Research on the Corrosive Factors of Q235 Steel in Simulate Ammonium Sulfate Solution of Ammonia Desulphurization
p.165

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Study on Microstructure and Property in Heat-Affected Zone of X80 Pipeline Steel

Abstract:

Experimental methods, such as OM, TEM and property testing, were used to study the HAZ microstructure and property of X80 pipeline steel. HAZ can be divided into three regions, such as coarse grain zone, transition zone and fine grain zone. Granular bainite of CGHAZ consists of bainite ferrite (BF) lath and M/A constituents. Charpy impact energy of the HAZ is much lower than that of base metal, for the grain size of CGHAZ is much larger than that of BM, and crack formation and propagation of granular bainite is easy.