Steel plate for high strength high toughness heavy gauge containment of pressurized water reactor nuclear power plant and production method thereof
A high-strength and high-toughness technology for pressurized water reactor nuclear power plants, used in nuclear power generation, nuclear engineering, reactors, etc., can solve problems such as increased cost, no provision of mechanical properties of steel plates, and no provision of high temperature tensile indicators at 150°C or 200°C. , to achieve the effect of improving the yield, excellent low temperature toughness index and high strength
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Embodiment 1-4
[0045] Table 2 Example 1-4 forging process
[0046]
[0047] The rolling and heat treatment process of embodiment 1-4 are as shown in table 3:
Embodiment 1
[0051] In the production method of this embodiment, the molten steel is smelted in a converter, refined outside the furnace, and vacuum treated, and cast into a continuous casting slab (thickness 300 mm), and the continuous casting slab is forged into a steel slab with a thickness of 290 mm through longitudinal forging + transverse forging. The forged steel billet is heated and rolled again, and the thickness of the finished steel plate is 91mm. See Example 1 in Table 1 for its composition, see Example 1 in Table 2 and Table 3 for forging, rolling and heat treatment processes, and see Table 4 for its mechanical properties.
[0052] The mechanical property result of table 4 embodiment 1
[0053]
[0054] The 91mm thick steel plate has been quenched and tempered, and all performance indicators fully meet the requirements. At the same time, the steel plate has good comprehensive mechanical properties and welding performance, and meets the requirements of GB / T 2970 standard Cla...
Embodiment 2
[0056] In the production method of this embodiment, the molten steel is smelted in a converter, refined outside the furnace, and vacuum-treated, and cast into a continuous casting slab (thickness 300mm); The forged steel billet is heated and rolled again, and the thickness of the finished steel plate is 100mm. See Example 2 in Table 1 for its composition, see Example 2 in Table 2 and Table 3 for forging, rolling and heat treatment processes, and see Table 5 for its mechanical properties.
[0057] Table 5 Example 2 mechanical property results
[0058]
[0059] The 100mm thick steel plate has been quenched and tempered, and all performance indicators fully meet the requirements. At the same time, the steel plate has good comprehensive mechanical properties and welding performance, and meets the requirements of GB / T 2970 standard Class I ultrasonic flaw detection.
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Abstract
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