Thin hot forming steel directly rolled through thin slab and having tensile strength larger than or equal to 2100 MPa and production method
A 2100mpa, tensile strength technology, applied in the field of thin hot-formed steel with a tensile strength of ≥2100MPa directly rolled from thin slabs and the production field, it can solve the problems of low strength level and cannot meet the needs of high-strength parts, and achieve the manufacturing process. Short, energy saving, good surface quality effect
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[0041] The present invention is described in detail below:
[0042] Table 1 is the value list of the chemical components of each embodiment of the present invention and comparative examples;
[0043] Table 2 is the value list of the main process parameters of each embodiment of the present invention and comparative examples;
[0044] Table 3 is a list of performance testing conditions of each embodiment of the present invention and comparative examples.
[0045] Each embodiment of the present invention is all produced by following process:
[0046] 1) Desulfurization of molten iron, and control S≤0.002%, and the exposed surface of molten iron after slag removal is not less than 96%;
[0047] 2) Conventional electric furnace or converter smelting, and conventional refining;
[0048] 3) Carry out continuous casting, control the superheat of molten steel in the tundish at 15-30°C, the thickness of the slab at 48-52mm, and the casting speed at 4.0-7.0 m / min;
[0049] 4) Carry ...
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