A high-strength steel plate for car threshold reinforcement plate and production method thereof
A high-strength steel plate and production method technology, applied in the field of metallurgy, can solve the problems that it is difficult to galvanize, cold-rolled dual-phase steel plate is difficult to use in high-end car threshold parts, etc., to achieve simple manufacturing process, easy control of process window, quality Good results
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Embodiment 1
[0034] The chemical composition and mass percentage of the high-strength steel plate in this example are shown in Table 1, and its mechanical properties are shown in Table 2.
[0035] The production method of the high-strength steel plate for the car door sill reinforcement plate in this embodiment includes smelting, casting, heating, hot rolling, cold rolling and hot-dip galvanizing processes. The steps of each process are as follows:
[0036] Smelting process: the tapping temperature of molten steel is 1670°C;
[0037] Heating process: the heating temperature is 1239°C, and the holding time is 150min;
[0038] Hot rolling process: 7-pass rolling, the plate thickness after rolling is 3.0mm; the rough rolling temperature is 1137°C, the final rolling temperature is 922°C, and the coiling temperature is 599°C;
[0039] Cold rolling process: the total reduction rate is 60%, and the plate thickness after rolling is 1.2mm;
[0040] Hot-dip galvanizing process: heat the cold-roll...
Embodiment 2
[0043] The chemical composition and mass percentage of the high-strength steel plate in this example are shown in Table 1, and its mechanical properties are shown in Table 2.
[0044] The production method of the high-strength steel plate for the car door sill reinforcement plate in this embodiment includes smelting, casting, heating, hot rolling, cold rolling and hot-dip galvanizing processes. The steps of each process are as follows:
[0045] Smelting process: the tapping temperature of molten steel is 1674°C;
[0046] Heating process: the heating temperature is 1254°C, and the holding time is 148min;
[0047] Hot rolling process: 7-pass rolling, the plate thickness after rolling is 4.0mm; the rough rolling temperature is 1153°C, the final rolling temperature is 937°C, and the coiling temperature is 595°C;
[0048] Cold rolling process: the total reduction rate is 60%, and the plate thickness after rolling is 1.6mm;
[0049] Hot-dip galvanizing process: heat the cold-rolled...
Embodiment 3
[0051] The chemical composition and mass percentage of the high-strength steel plate in this example are shown in Table 1, and its mechanical properties are shown in Table 2.
[0052] The production method of the high-strength steel plate for the car door sill reinforcement plate in this embodiment includes smelting, casting, heating, hot rolling, cold rolling and hot-dip galvanizing processes. The steps of each process are as follows:
[0053] Smelting process: the tapping temperature of molten steel is 1676°C;
[0054] Heating process: the heating temperature is 1240°C, and the holding time is 160min;
[0055] Hot rolling process: 7-pass rolling, the plate thickness after rolling is 4.5mm; the rough rolling temperature is 1135°C, the final rolling temperature is 933°C, and the coiling temperature is 577°C;
[0056] Cold rolling process: the total reduction rate is 62%, and the plate thickness after rolling is 1.7mm;
[0057] Hot-dip galvanizing process: heat the cold-roll...
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Abstract
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