Thick hot galvanized complex phase steel and production method thereof
A production method, hot-dip galvanizing technology, applied in the field of multi-phase steel metallurgy, can solve the problems of forming performance, galvanizing performance and welding performance without comprehensive consideration, and achieve significant economic and social benefits, welding performance and galvanizing performance excellent effect
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[0041] Example 1
[0042] The high-formability and high-strength hot-dip galvanized dual-phase steel of this embodiment is produced according to the following process:
[0043] (1) Smelting process: C: 0.090%, Si: 0.24%, Mn: 1.7%, Mo: 0.33%, Als: 0.045%, Nb: 0.058%, P: 0.020%, S: 0.005%, N: 0.004% , Ti: 0.095%, and then cast into a slab with a thickness of 200mm.
[0044] (2) Hot rolling process: hot rolled coil is obtained after heating, dephosphorizing, hot rolling and laminar cooling of the cast slab. The heating temperature is 1240℃, the finishing temperature is 1080℃, and the finishing temperature is 860~900℃. , The coiling temperature is 600~630℃, the thickness of the hot-rolled plate is 3.0mm;
[0045] (3) Pickling process: pickling the hot-rolled sheet, adding a corrosion inhibitor to the acid solution with a free acid concentration of 80~110g / L to form a pickling solution, the corrosion inhibitor accounts for 0.05~0.10% of the pickling solution , The temperature of the pick...
Example Embodiment
[0048] Example 2
[0049] The high-formability and high-strength hot-dip galvanized dual-phase steel of this embodiment is produced according to the following process:
[0050] (1) Smelting process: C: 0.090%, Si: 0.24%, Mn: 1.7%, Mo: 0.33%, Als: 0.045%, Nb: 0.058%, P: 0.020%, S: 0.005%, N: 0.004% , Ti: 0.095%, and then cast into a slab with a thickness of 200mm.
[0051] (2) Hot rolling process: hot rolled coils are obtained by heating, dephosphorizing, hot rolling and laminar cooling of the cast slab, wherein the heating temperature is 1250℃, the finishing temperature is 1070℃, and the finishing temperature is 890~930℃ , The coiling temperature is 620~650℃, the thickness of the hot-rolled plate is 3.0mm;
[0052] (3) Pickling process: pickling the hot-rolled sheet, adding a corrosion inhibitor to the acid solution with a free acid concentration of 80~110g / L to form a pickling solution, the corrosion inhibitor accounts for 0.05~0.10% of the pickling solution , The temperature of th...
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