MATEC Web Conf.
Volume 186, 20182018 The 7th International Conference on Engineering Mathematics and Physics (ICEMP 2018)
|Number of page(s)||6|
|Section||Material Physics and Performance Analysis|
|Published online||06 August 2018|
Effect of Annealing Process on the Mechanical Properties of X70 Pipeline Steel
Shougang research institute of technology, Beijing 100043, China
2 Shougang Jingtang Steel Company, Hebei Caofeidian 063210, China
The influence of the mechanical properties of X70 pipeline steel under different annealing temperature was studied. The corresponding microstructure was investigated by the Field Emission Scanning Electron Microscopy. The results showed that the yield strength and the tensile strength both experienced from rise to decline with the increase of annealing temperature. The grain sizes were coarse and a large amount of cementite precipitated due to preserving temperature above 550 °, which induced matrix fragmentation and deteriorate the -10 ° DWTT Toughness. There were little changes on the microstructure and mechanical properties when the annealing temperature was under 500 °.
© The Authors, published by EDP Sciences, 2018
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