Modified EH550 super-thick steel plate for marine engineering and manufacturing method thereof
A technology for marine engineering and extra-thick steel plates, which is applied in the field of quenched and tempered EH550 extra-thick steel plates for marine engineering and its manufacturing field, which can solve the problem that the thickness specification cannot meet the steel index requirements for offshore platforms, cannot meet the steel index requirements for offshore platforms, and cannot Steel plate core impact toughness and other issues, to achieve the effect of reasonable chemical composition design, good structure and performance uniformity, excellent low temperature plasticity and toughness
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[0039] The following examples are used to specifically illustrate the contents of the present invention, and these examples are only general descriptions of the contents of the present invention, and do not limit the contents of the present invention.
[0040] Table 1 is the chemical composition of the steel of the embodiment of the present invention, Table 2 is the rolling and heat treatment process of the steel of the embodiment of the present invention; Table 3 is the tensile and impact properties of the steel of the embodiment of the present invention.
[0041] Table 1 The chemical composition of steel in the embodiment of the present invention wt%
[0042]
[0043] Table 2 steel rolling method of the embodiment of the present invention
[0044]
[0045] Table 3 Tensile and impact properties of the steel of the embodiment of the present invention
[0046]
[0047] It can be seen from the examples that the primary quenching + secondary sub-temperature quenching + ...
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