High-strength cold-roll phase-change plastic steel plate with good plasticity and preparation method thereof
A high-strength, plastic technology, applied in the direction of temperature control, etc., can solve the problem of deteriorating the surface quality of the slab, and achieve the effects of poor surface immersion plating, good plasticity, and improved welding performance
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[0014] The preparation process of the high-strength cold-rolled phase change plastic steel sheet with good plasticity used in the embodiment of the present invention includes: converter smelting, LF furnace refining, continuous casting of slabs with a thickness of 135 mm or more, hot rolling at 1000 to 1250°C, and its final rolling temperature It is 760-900°C, the coiling temperature is 560-700°C, and then cold-rolled with a cumulative reduction of 40%-80% to produce a steel plate with a thickness of 0.5-2.0mm. Then heat treatment: the cold-rolled steel sheet is isothermally held at 710-850°C for 1 to 6 minutes, then rapidly cooled to 330-500°C at a rate of 10-50°C / s and isothermally held for 5-20 minutes, and finally heated at 5-20°C / s Cool down to room temperature at the s rate to obtain a high-strength cold-rolled phase change plastic steel sheet with good plasticity. The steel grade composition of the embodiment of the present invention is shown in Table 1, the annealing sy...
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