Anti-acid steel plate for steel structure work
A technology of steel structure and steel plate, applied in the field of steel plate, can solve the problems of no acid resistance, damage, safety hazard, etc., and achieve the effect of improving acid resistance and avoiding the formation of banded structure.
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Embodiment 1
[0013] This embodiment is an acid-resistant steel plate used in steel structure engineering. The composition and mass percentage of the steel plate are: C: 0.27%, Mn: 0.35%, Si: 0.17%, P: 0.006%, S: 0.002%, Nb: 0.03%, V: 0.04%, Ti: 0.15%, Al: 0.018%, N: 0.006%, H: 0.00020%, Cu: 0.022%, Ni: 1.65%, Cr: 0.54%, Mo: 0.13%, The balance is Fe and unavoidable impurities;
[0014] After rolling, the steel plate is heat-treated by a heat treatment process of normalizing-secondary normalizing-tempering, the normalizing temperature is 930°C, and the first cooling process is used to cool to room temperature; the secondary normalizing temperature is 760°C , using the second cooling process to cool to room temperature; the tempering temperature is 640 ° C, using the third cooling process to cool to room temperature;
[0015] The first cooling process: first use water cooling to cool the steel to 720°C at a cooling rate of 12°C / s, then air cool to 650°C, and then use compressed air or mist q...
Embodiment 2
[0018] This embodiment is an acid-resistant steel plate used in steel structure engineering. The composition and mass percentage of the steel plate are: C: 0.28%, Mn: 0.36%, Si: 0.18%, P: 0.007%, S: 0.003%, Nb: 0.04%, V: 0.05%, Ti: 0.16%, Al: 0.019%, N: 0.002%, H: 0.0001%, Cu: 0.023%, Ni: 1.667%, Cr: 0.55%, Mo: 0.14%, The balance is Fe and unavoidable impurities;
[0019] After the steel plate is rolled, heat treatment is carried out using a heat treatment process of normalizing-secondary normalizing-tempering, the normalizing temperature is 940°C, and the first cooling process is used to cool to room temperature; the secondary normalizing temperature is 770°C , using the second cooling process to cool to room temperature; the tempering temperature is 650 ° C, using the third cooling process to cool to room temperature;
[0020] Among them, the first cooling process: first use water cooling to cool the steel to 730°C at a cooling rate of 13°C / s, then air cool to 660°C, and th...
Embodiment 3
[0023] This embodiment is an acid-resistant steel plate used in steel structure engineering. The composition and mass percentage of the steel plate are: C: 0.29%, Mn: 0.37%, Si: 0.19%, P: 0.008%, S: 0.005%, Nb: 0.05%, V: 0.06%, Ti: 0.17%, Al: 0.19%, N: 0.001%, H: 0.0001%, Cu: 0.024%, Ni: 1.67%, Cr: 0.56%, Mo: 0.15%, The balance is Fe and unavoidable impurities;
[0024] After the steel plate is rolled, heat treatment is carried out using a heat treatment process of normalizing-secondary normalizing-tempering, the normalizing temperature is 950°C, and the first cooling process is used to cool to room temperature; the secondary normalizing temperature is 780°C , using the second cooling process to cool to room temperature; the tempering temperature is 660 ° C, using the third cooling process to cool to room temperature;
[0025] Among them, the first cooling process: first use water cooling to cool the steel to 750°C at a cooling rate of 15°C / s, then air cool to 670°C, and then...
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