Steel plate for high toughness 15CrMoR pressure container
A pressure vessel and high toughness technology, applied in the field of chromium-molybdenum heat-resistant pressure vessel steel manufacturing, can solve the problems of inability to meet special requirements, large temperature differential stress, unreliability, etc., and achieves conventional performance and good high temperature tensile properties. , The grains are uniform and fine, and the effect of improving the impact toughness
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Embodiment 1
[0020] The high-toughness 15CrMoR steel plate for pressure vessels in this example is prepared from the following components by mass percentage: C: 0.18%, Si: 0.23%, Mn: 0.55%, P: 0.016%, S: 0.002%, Cr: 1.03%, Mo: 0.46%, the balance is Fe and unavoidable impurities;
[0021] The production preparation method of the high toughness 15CrMoR pressure vessel steel plate of the present embodiment is as follows:
[0022] 1) Smelting: After the raw material molten iron is pretreated by KR, it is smelted in the top-bottom re-blowing converter, the ladle is blown with argon and then sent to the LF refining furnace for refining, and then vacuum treatment is carried out in the VD furnace for 17 minutes. After the treatment, it is fed Calcium iron wire 2m / t, soft argon blowing for 10 minutes after wire feeding;
[0023] 2) Casting: After the VD furnace breaks the vacuum, pour on the continuous casting machine. During the pouring process, the casting machine adopts fan-shaped electromagnet...
Embodiment 2
[0028] The high-toughness 15CrMoR steel plate for pressure vessels in this example is prepared from the following components in mass percentage: C: 0.17%, Si: 0.25%, Mn: 0.55%, P: 0.012%, S: 0.002%, Cr: 1.03%, Mo: 0.47%, the balance is Fe and unavoidable impurities.
[0029] The production and preparation method of the high-toughness 15CrMoR steel plate for pressure vessels in this example is the same as in Example 1, the difference is that the vacuum holding time of the VD furnace is 15 minutes, the heating time of the billet in the furnace is 4.5 hours, and the furnace temperature is 1180°C.
Embodiment 3
[0031] The high-toughness 15CrMoR steel plate for pressure vessels in this example is prepared from the following components in mass percentage: C: 0.17%, Si: 0.27%, Mn: 0.55%, P: 0.017%, S: 0.001%, Cr: 0.94%, Mo: 0.46%, the balance is Fe and unavoidable impurities.
[0032] The production and preparation method of the high-toughness 15CrMoR pressure vessel steel plate in this example is the same as in Example 1, the difference is that the vacuum holding time of the VD furnace is 15 minutes, the heating time of the continuous casting slab in the heating furnace is 4.5 hours, the temperature of the furnace is 1180 ° C, and the finishing mill The rolling start temperature is 950°C, the rolled finished steel plate size is 40mm, the normalizing temperature is 920°C, the furnace time is 60 minutes, the tempering temperature is 660°C, and the furnace time is 100 minutes.
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