Thin thermoformed steel with tensile strength being not lower than 1700 MPa directly rolled by sheet billet and production method of thin thermoformed steel
A technology with a tensile strength of 1700MPa, which is applied in the field of thin hot-formed steel with a tensile strength ≥ 1700MPa directly rolled by thin slabs and the production field, can solve the problems that cannot meet the needs of ultra-high-strength parts and low-strength levels, and achieve saving Effects of energy consumption, short manufacturing process, and high thickness accuracy
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[0041] The present invention will be described in detail below:
[0042] Table 1 is a list of the chemical component values of each embodiment and comparative example of the present invention;
[0043] Table 2 is a value list of main process parameters of each embodiment and comparative example of the present invention;
[0044] Table 3 is a list of performance detection conditions of various embodiments and comparative examples of the present invention.
[0045] Each embodiment of the present invention is produced according to the following process:
[0046] 1) Desulfurization of molten iron, and control S≤0.002%, the exposed surface of molten iron after slagging is not less than 96%;
[0047] 2) Conventional electric furnace or converter smelting, and conventional refining;
[0048] 3) For continuous casting, control the superheat of the molten steel in the tundish at 15~30℃, the thickness of the cast slab at 52~55mm, and the drawing speed at 3.7~7.0 m / min;
[0049] 4) Carry out the de...
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