Steel plate cooling method
A cooling method and steel plate technology, applied in the field of steel plate cooling, can solve the problems of increasing the production cost of the steel plate, reducing the weldability of the steel plate, reducing the comprehensive performance of the steel plate, etc., and achieving the effect of improving the delivery capacity, uniform performance and stable production process.
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[0028] Example 1
[0029] The steel plate produced experimentally in this example is a 60mm thick Q345GJC steel plate. First, the steel plate is normalized, and the normalizing process of the steel plate is as follows: the normalizing temperature is 870°C, and the holding time is 20min. The steel plate is then accelerated quenching in a water-cooled mode. Through the exploration of the water cooling mode, the water cooling process parameters of the steel plate in the quenching section are finally determined as shown in Table 1. The total flow of water in the 15th to 18th stages is 2000m 3. The steel plate enters the quenching section for cooling at a speed of 60m / min, and the roller table speed of the quencher is 40m / min. After the steel plate is cooled by water, the reddening temperature of the steel plate is between 630 and 670 °C. After inspection, the yield strength and tensile strength of the steel plate are 40-60MPa higher than those of the conventional normalizing ...
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[0033] Example 2
[0034] The steel plate in this example is a 100mm thick Q345C steel plate with a strength slightly lower than the standard after normalizing. The normalizing process of the steel plate is as follows: the normalizing temperature is 860°C and the holding time is 30min. The water cooling process was further explored, and the water cooling process parameters of the steel plate in the quenching section were finally determined as shown in Table 2. The total flow of water in the 15th to 18th stages is 1200m 3 . The steel plate enters the quenching section for cooling at a speed of 40m / min, and the roller table speed of the quenching machine is 30m / min. After the steel plate is cooled by water, the reddening temperature of the steel plate is between 640 and 680 °C. After inspection, the yield strength and tensile strength of the steel plate are 30-50MPa higher than those of the conventional normalizing treatment, and the strength of the steel plate meets the sta...
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[0038] Example 3
[0039] The steel plate in this example is a 100mm thick Q345C steel plate with a strength slightly lower than the standard after normalizing. The normalizing process of the steel plate is as follows: the normalizing temperature is 910°C and the holding time is 50min. The water cooling process was further explored, and the water cooling process parameters of the steel plate in the quenching section were finally determined as shown in Table 3. The total flow of water in the 15th to 18th stages is 3600m 3 . The steel plate enters the quenching section for cooling at a speed of 50m / min, and the roller speed of the quenching machine is 35m / min. After the steel plate is cooled by water, the reddening temperature of the steel plate is between 640 and 680 °C. After inspection, the yield strength and tensile strength of the steel plate are 30-50MPa higher than those of the conventional normalizing treatment, and the strength of the steel plate meets the standard ...
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