590MPa-grade cold-rolled transformation induced plasticity steel and preparation method thereof
A transformation-induced plasticity and continuous casting technology, applied in the field of cold-rolled transformation-induced plasticity steel, can solve the problems of high deformation resistance and poor steel surface quality, achieve high plastic mechanical properties, and the heating and cooling process parameters are easy to achieve , the effect of broad market prospects
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Embodiment 1
[0029] The components of the 590MPa grade cold-rolled phase-transformation-induced plasticity steel provided in this example and the percentages by weight of each component are: C: 0.11%, Si: 0.78%, Mn: 1.25%, P: 0.005%, S: 0.001%, and the remainder The amount is Fe and unavoidable inclusions.
[0030] The process of preparing the 590MPa grade cold-rolled phase-change-induced plasticity steel described in this example includes: molten iron pretreatment→converter smelting→external refining→continuous casting→heating→controlled rolling and controlled cooling→coiling→pickling→cold rolling→continuous Annealing→leveling→functional inspection→packing and leaving the factory;
[0031] In the method for preparing the 590MPa grade cold-rolled transformation-induced plasticity steel described in this embodiment, the specific control requirements are as follows:
[0032] S in molten iron after pretreatment of molten iron ≤ 0.003%, iron slag thickness ≤ 20mm;
[0033] During the convert...
Embodiment 2
[0041] The components of the 590MPa grade cold-rolled phase-transformation-induced plasticity steel provided in this example and the percentages by weight of each component are: C: 0.11%, Si: 0.80%, Mn: 1.19%, P: 0.003%, S: 0.002%, and The amount is Fe and unavoidable inclusions.
[0042] The process flow for preparing the 590MPa grade cold-rolled phase-change-induced plasticity steel described in this example is the same as Example 1, the only difference is that the casting speed in the continuous casting process is 1.2m / min, and the furnace speed in the continuous annealing process parameters is 200m / min. min.
[0043] The mechanical performance test results of the 590MPa grade cold-rolled phase transformation-induced plasticity steel provided in this embodiment are shown in the following table:
[0044] steel type Yield strength (MPa) Tensile strength (MPa) Elongation A 80 (%)
Embodiment 3
[0046] The components of the 590MPa grade cold-rolled phase-transformation-induced plasticity steel provided in this example and the percentages by weight of each component are: C: 0.11%, Si: 0.84%, Mn: 1.27%, P: 0.003%, S: 0.001%, and The amount is Fe and unavoidable inclusions.
[0047] The process flow for preparing the 590MPa grade cold-rolled transformation-induced plasticity steel described in this example is the same as that in Example 1, the only difference being that the furnace speed in the continuous annealing process parameter is 200m / min.
[0048] The mechanical performance test results of the 590MPa grade cold-rolled phase transformation-induced plasticity steel provided in this embodiment are shown in the following table:
[0049] steel type Yield strength (MPa) Tensile strength (MPa) Elongation A 80 (%)
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