A kind of ultra-high-strength steel plate with a yield strength of 960mpa and its manufacturing method
A yield strength and ultra-high strength technology, applied in the field of high-strength steel plate and its manufacturing, can solve the problems of high energy consumption, large amount of alloy addition, long quenching and tempering process, etc., and achieve the effect of good toughness and cold bending performance
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[0031]The chemical composition of the 960MPa super-strength steel plate involved in the present invention is shown in Table 1. According to the chemical composition shown in Table 1, carry out converter smelting and refining outside the furnace and pour into continuous casting slabs. After the continuous casting slabs are heated, they are rolled in medium and thick plate rolling mills, and the steel plates are directly quenched after rolling. See Table 2 for main process parameters such as slab heating temperature, rough rolling finish temperature, finish rolling start temperature, and finish rolling finish temperature. Performance indicators such as steel plate strength, -40°C impact energy, and elongation are listed in Table 3.
[0032] Table 1 The chemical composition (wt.%) of the 960MPa grade ultra-high strength steel of Example 1-3 of the present invention
[0033] Example
C
Si
mn
P
S
Cr
Ni
Nb
Mo
V
Ti
B
Al
...
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Property | Measurement | Unit |
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