Manufacturing method of high strength bluing strapping steel
A production method and high-strength technology, applied in the coating, metal material coating process, solid-state diffusion coating and other directions, can solve the problems of complex operation, environmental pollution, high energy consumption, etc., to achieve simple process, low environmental pollution, The effect of less energy consumption
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Embodiment 1
[0032] The raw material steel is designed with the following composition: C: 0.198%, Mn: 1.62%, Si: 0.028%, P: 0.018%, S: 0.0044%, Als: 0.033%.
[0033] After the smelting process is completed, the hot-rolled rough rolling temperature is 1040°C, the finish rolling temperature is 860°C, and the coiling temperature is 610°C. The tensile strength of the hot-rolled raw material is 585MPa, and the elongation is 29%. After pickling, cold rolling is 9 times of repeated rolling, and the distribution of rolling passes is as follows: 3.0→2.7→2.1→1.8→1.6→1.4→1.2→1.1→1.0→0.9mm, the total reduction rate is 70%, The tensile strength of the cold-rolled raw material is 985MPa, and the elongation is 5%.
[0034] After the cold-rolled raw material is uncoiled and slitting, it enters an electric resistance furnace for bluing. The bluing temperature is 630° C., and the bluing time is 130s. After bluing, it is cooled in the air, then waxed, dried, and coiled. The tensile strength of the blue str...
Embodiment 2
[0036] The raw material steel is designed with the following composition: C: 0.21%, Mn: 1.71%, Si: 0.026%, P: 0.018%, S: 0.0042%, Als: 0.04%.
[0037] After the smelting process is completed, the rough rolling temperature of hot rolling is 1120°C, the finishing rolling temperature is 900°C, the coiling temperature is 650°C, the tensile strength of the hot rolling raw material is 580 MPa, and the elongation is 30%. After pickling, cold rolling is 10 times of repeated rolling, and the distribution of rolling passes is as follows: 3.0→2.8→2.5→2.0→1.9→1.7→1.5→1.2→1.1→1.0→0.9mm, the total reduction ratio is 70 %, the tensile strength of cold-rolled raw materials is 1000MPa, and the elongation is 5.5%.
[0038] After the cold-rolled raw material is uncoiled and slitting, it enters an electric resistance furnace for bluing. The bluing temperature is 660°C, and the bluing time is 120 s. After bluing, it is cooled in the air, then waxed, dried, and coiled. The tensile strength of the...
Embodiment 3
[0040] The raw material steel is designed with the following composition: C: 0.19%, Mn: 1.66%, Si: 0.02%, P: 0.014%, S: 0.006%, Als: 0.05%.
[0041] After the smelting process is completed, the hot rolling rough rolling temperature is 1100°C, the finishing rolling temperature is 880°C, and the coiling temperature is 670°C. The tensile strength of the hot rolling raw material is 575MPa and the elongation is 28%. After pickling, cold rolling is 10 times of repeated rolling, and the distribution of rolling passes is as follows: 3.0→2.8→2.5→2.0→1.9→1.7→1.5→1.2→1.1→1.0→0.9mm, the total reduction ratio is 70 %, the tensile strength of the cold-rolled raw material is 980MPa, and the elongation is 6%.
[0042] After the cold-rolled raw material is uncoiled and slitted, it enters an electric resistance furnace for bluing. The bluing temperature is 650° C., and the bluing time is 150s. After bluing, it is cooled in the air, then waxed, dried, and coiled. The tensile strength of the bl...
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