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Microstructure characteristics and mechanical properties of X80 pipeline steels
Journal of Wuhan University of Technology-Mater. Sci. Ed., 2012The relation between microstructure characteristics and mechanical properties of X80 pipeline steels was investigated using optical microscopy, scanning electron microscopy, etc. It is shown that the structure consists of polygonal ferrite (PF), quasi-polygonal ferrite (QPF), acicular ferrite (AF), and granular bainitic ferrite (GF).
Min Zhou +3 more
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Electrochemical behaviour of X80 pipeline steel with alumina coating
Surface Engineering, 2015X80 pipeline steel was firstly aluminised at a relative low temperature then treated by a microarc oxidation process. Electrochemical behaviour of X80 pipeline steel before and after the combined treatment was evaluated by electrochemical tests in different solution. Results show that ceramics coating composed of α-Al2O3 and γ-Al2O3 can be obtained on
M. Huang +4 more
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Welding of the high Grade Pipeline-Steel X80 and Description of Different Pipeline-Projects
Welding in the World, 2008Nowadays already a lot of large onshore-projects have been implemented for the steel X80 with, as it seems, fully satisfactory results. The high grade pipeline-steel X80 is discussed in detail in this paper as well as the various projects performed with X80.
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Passivation process of X80 pipeline steel in bicarbonate solutions
International Journal of Minerals, Metallurgy, and Materials, 2011The passivation process of X80 pipeline steel in bicarbonate solutions was investigated using potentiodynamic, dynamic electrochemical impedance spectroscopy (DEIS), and Mott-Schottky measurements. The results show that the shape of polarization curves changes with HCO 3 − concentration. The critical
Jian-long Zhou +5 more
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SH-CCT of High-Strain Pipeline Steel X80
Advanced Materials Research, 2012Simulated heat affected zone continuous cooling transformation curve was measured by means of Gleeble 3500 thermal simulator. According to the results of microstructure observation and hardness measurement, influence of cooling rates on the microstructure and hardness in coarse grain zone of high-strain pipeline steel X80 was studied.
Mei Juan Hu +4 more
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Constitutive relationship of hot deformation of X80 pipeline steel
2010 International Conference on Mechanic Automation and Control Engineering, 2010In order to realize numerical simulation of hot rolling and establish the hot deformation process parameters for X80 pipeline steel, the flow stress behavior of X80 pipeline steel during hot deformation was investigated in the temperature range of 900–1100°C and strain rate of 0.01–1s−1 on Gleeble-3500 thermo-simulation machine.
null Ma Bo +3 more
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Reliability Inverse Analysis Method of X80 Pipeline Parameter Design
ICPTT 2011, 2011Reliability inverse analysis method of X80 pipeline parameter design is proposed. Considering the condition of normal and non-normal distribution for design variables, the inverse problem calculation theory of stochastic reliability is analyzed. Based on the first order second moment reliability theory, geometric algorithm is introduced to solve ...
Lisong Zhang +2 more
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Experimental Study on Girth Welds of X80 High Deformability Pipeline
Volume 6: Materials and Fabrication, Parts A and B, 2008Girth welds of X80 high deformability pipeline were welded by self-shield flux-cored arc weld (FCAW) and manual shield-metal arc weld (SMAW). The FCAW used E9018-G electrode to weld root and under-matched flux-cored wires to fill welding and cap welding.
Xiaodong He +4 more
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IMPACT FRACTURE BEHAVIOR OF X80 PIPELINE STEEL
ACTA METALLURGICA SINICA, 2010Wei DENG +5 more
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