Production method for cold-rolled IF steel with high surface cleanliness
A production method and cleaning technology, applied in the direction of workpiece cleaning device, workpiece surface treatment equipment, metal rolling, etc., can solve the problem that it is difficult to obviously improve the cleanliness of finished strip steel, cannot meet the production requirements of high-cleanliness cold-rolled IF steel, Unstable production and other issues, to achieve significant economic benefits and brand benefits, low overall manufacturing costs, mature and stable production process
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[0045] Example 1
[0046] In one embodiment embodiment, once the target discharge capacity were 500 tons IF steel, cold rolled finished strip thickness of 0.65 ~ 0.80mm, 1450 ~ 1780mm width; the output strip batch has a good surface cleaning performance, cleaning its surface 92.2 ~ 93.1% reflectance, the finished strip satisfies all high-end car and appliance steel outer panel customer requirements.
[0047] Production Example 1 of the following steps:
[0048] (1) after unwinding hot rolled coils IF welding straightening broken scales, straightening elongation of 1.7 to 1.9%, # 1, # 2, and the bending roller straightening roller insertion depth are 30mm, 23mm and 11mm;
[0049] (2) the shallow grooves strip continuous turbulent pickling hydrochloric acid the temperature 80 ~ 82 ℃, 3 # grooves acid concentration of free acid 179g / L, the pickling speed of 120m / min, less acid or no surface pickling;
[0050] Turbulent continuous shallow groove hydrochloric acid according to the ...
Example Embodiment
[0059] Example 2
[0060] Example 2 In this embodiment, a scheduling target IF total 500 tons of steel, cold rolled finished strip thickness of 0.65 ~ 0.80mm, 1550 ~ 1850mm width; the output strip batch has a good surface cleaning performance, cleaning its surface 92.0 ~ 92.6% reflectance, the finished strip satisfies all high-end car and appliance steel outer panel customer requirements.
[0061] Production Example 2 the following steps:
[0062] (1) after unwinding hot rolled coils IF welding straightening broken scales, straightening elongation of 1.5 to 1.8%, # 1, # 2, and the bending roller straightening roller insertion depth of respectively 28mm, 21.5mm and 12mm;
[0063] (2) the shallow grooves strip continuous turbulent pickling hydrochloric acid the temperature 80 ~ 82 ℃, 3 # grooves acid concentration of free acid 169g / L, the pickling speed of 140m / min, less acid or no surface pickling;
[0064] Turbulent continuous shallow groove hydrochloric acid according to the ...
Example Embodiment
[0073] Example 3
[0074] Example 3 In this embodiment, a scheduling target IF total 500 tons of steel, cold rolled finished strip thickness of 0.65 ~ 0.80mm, 1000 ~ 1500mm width; the output strip batch has a good surface cleaning performance, cleaning its surface 92.2 ~ 93.0% reflectance, the finished strip satisfies all high-end car and appliance steel outer panel customer requirements.
[0075] Production Example 3 the following steps:
[0076] (1) after unwinding hot rolled coils IF welding straightening broken scales, straightening elongation of 1.5 to 2.0%, # 1, # 2, and the bending roller straightening roller insertion depth are 30mm, 23mm and 11mm;
[0077] (2) the shallow grooves strip continuous turbulent pickling hydrochloric acid the temperature 75 ~ 78 ℃, 3 # grooves acid concentration of free acid 190g / L, the pickling speed of 150m / min, less acid or no surface pickling;
[0078] Turbulent continuous shallow groove hydrochloric acid according to the process (3), p...
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