Hot-dip galvanized steel sheet with high tensile strength and superior processability and method for producing same
A hot-dip galvanized steel sheet, excellent workability technology, applied in manufacturing tools, chemical instruments and methods, heat treatment furnaces, etc., and can solve the problems of characteristics (strength deviation, insufficient uniformity of steel sheet characteristics, insufficient ends, etc., To achieve the effect of good surface quality and excellent workability
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Embodiment 1
[0142] Molten steel having the composition shown in Table 1 was smelted and continuously cast by a generally known method to obtain a 250 mm thick steel billet (steel raw material). After heating these slabs to 1250°C, rough rolling was performed, finish rolling was performed at the finishing temperature shown in Table 2, and coiling was performed at the coiling temperature shown in Table 2 to obtain steel sheets with a thickness of 2.3 mm. Hot rolled sheet.
[0143] The various hot-rolled sheets obtained as described above were subjected to continuous annealing treatment through a continuous hot-dip galvanizing line at the annealing temperature and holding time at the annealing temperature under the conditions shown in Table 2, and then immersed in molten zinc at 550°C. , performing a hot-dip galvanizing treatment to form a hot-dip galvanized film on the surface, thereby manufacturing a hot-dip galvanized steel sheet. It should be noted that the amount of coating adhesion is...
Embodiment 2
[0179] The molten steel with the composition shown in Table 5 was smelted and continuously cast by a generally known method to obtain a steel slab (steel raw material) with a thickness of 250 mm. After heating these slabs to 1250° C., rough rolling was carried out. The implementation settings are shown in Table 6. Finish rolling at the finishing temperature shown in Table 6, cooling at the average cooling rate (average cooling rate from finishing rolling temperature to coiling temperature) shown in Table 6, and coiling at the coiling temperature shown in Table 6 , to obtain a hot-rolled steel plate with a plate thickness of 2.3 mm.
[0180] Various hot-rolled sheets obtained as described above were subjected to continuous annealing treatment by a continuous hot-dip galvanizing line at the annealing temperature and holding time at the annealing temperature under the conditions shown in Table 6, and then immersed in molten zinc at 550°C. A hot-dip galvanizing treatment is perfor...
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