Steel for automobile stamping part, preparation method thereof, and automobile stamping part
A technology for automobile stamping parts and hot stamping forming, which is applied in the steel for automobile stamping parts and its preparation, and in the field of automobile stamping parts. It can solve the problems of low elongation, achieve high elongation, ensure dimensional accuracy, and low hydrogen embrittlement sensitivity Effect
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Embodiment 1 to Embodiment 5
[0065] Embodiments 1 to 5 provide a steel for automobile stamping parts, a preparation method thereof, and automobile stamping parts.
[0066] The preparation process of steel for automobile stamping parts is as follows:
[0067] The molten steel is refined and continuously cast to obtain a slab. The chemical composition of the slab is shown in Table 1 (the rest is Fe and unavoidable impurities). The slab is heated, and the slab is passed through a fixed-width press to obtain the required width, and then rough rolled to obtain an intermediate slab. The intermediate billet is finished rolling to obtain a hot-rolled sheet, the hot-rolled sheet is cooled by laminar flow, and coiled into a hot-rolled coil, and the hot-rolled coil is pickled, cold-rolled, continuously annealed and tempered to obtain an automobile stamping The pieces are made of steel.
[0068] The preparation process of automobile stamping parts is as follows: the steel for automobile stamping parts is subjected ...
Embodiment 1
[0069] In Example 1, the heating temperature of the slab is 1200°C, and the temperature is kept for 1 hour. The coil thickness is 6mm; the reduction rate of cold rolling is 75%, and the thickness of the steel plate after cold rolling is 1.5mm; the continuous annealing temperature is 740°C; The speed is 45°C / s, the mold opening temperature is 160°C, and the mechanical properties of the automobile stamping parts obtained after quenching are shown in Table 2.
Embodiment 2
[0070] In Example 2, the heating temperature of the slab is 1220°C, and the heat preservation time is 1.5h. The thickness of the rolled coil is 6mm; the reduction rate of cold rolling is 80%, and the thickness of the steel plate after cold rolling is 1.2mm; the continuous annealing temperature is 740°C; The speed is 45°C / s, the mold opening temperature is 160°C, and the mechanical properties after quenching are shown in Table 2.
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Abstract
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