Rolling method of normalized structural steel
The invention discloses a rolling method of normalized structural steel. A process route is as follows: reheating of a slab; rolling; quick cooling of a steel plate; thermal correction of the steel plate; offline stack cooling and discharging; ultrasonic flaw detection of the steel plate; shot blast...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a rolling method of normalized structural steel. A process route is as follows: reheating of a slab; rolling; quick cooling of a steel plate; thermal correction of the steel plate; offline stack cooling and discharging; ultrasonic flaw detection of the steel plate; shot blasting; normalizing; accelerated cooling of the steel plate; shearing; and putting into storage. The steel plate which is put into storage comprises the following components in percent by weight: 0.13-0.16% of C, 0.10-0.30% of Si, 1.30-1.50% of Mn, 0.02-0.06% of Al, 0.03-0.04% of Nb, less than or equalto 0.02% of Ti, less than or equal to 0.015% of P, less than or equal to 0.005% of S, less than or equal to 0.006% of N and the balance iron and inevitable impurity elements. The thickness coverage of the steel plate suitable for the method is smaller than or equal to 100 mm. The rolling method is of important significance in lowering the production and manufacturing costs of the normalized structural steel and improving |
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