Low-activation bainitic steel applicable to neutron-irradiated environment and preparation method thereof
A bainitic steel, irradiation environment technology, applied in the field of metal materials, can solve the problems of large weld stress, high smelting cost, radioactive hazards, etc., to improve the deformation resistance, improve mechanical properties, and reduce hardenability. Effect
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Embodiment 1
[0019] (1) According to the composition ratio: Cr 2.5%, W 2.3%, V 0.20%, Ta 0.15%, Mn 0.50%, Si0.40%, C 0.10%, N 0.04%, P≤0.01%, S≤0.005% , O ≤ 0.005%, Al ≤ 0.01%, Ni ≤ 0.005%, Nb ≤ 0.001%, Co ≤ 0.005%, Cu ≤ 0.005%, Mo ≤ 0.005% (wt.%) and the burning loss ratio of the alloy raw materials.
[0020] (2) In the vacuum induction furnace, raw materials are added sequentially according to the burning loss and volatilization characteristics of the alloy elements. The easy-to-oxidize alloy elements are added after they are fully deoxidized. The volatile alloy elements are added under the protection of the atmosphere or at the end of the smelting process. After smelting, an ingot with qualified composition is prepared.
[0021] (3) The prepared ingot is melted by vacuum consumable arc to further purify the material.
[0022] (4) Forging the ingot obtained in step (3), the initial forging temperature is 1150° C., the temperature is kept for 50 minutes, and the final forging temperature...
Embodiment 2
[0027] (1) According to the composition ratio: Cr 2.8%, W 2.5%, V 0.20%, Ta 0.15%, Mn 0.50%, Si0.40%, C 0.10%, N 0.04%, P≤0.01%, S≤0.005% , O ≤ 0.005%, Al ≤ 0.01%, Ni ≤ 0.005%, Nb ≤ 0.001%, Co ≤ 0.005%, Cu ≤ 0.005%, Mo ≤ 0.005% (wt.%) and the burning loss ratio of the alloy raw materials.
[0028](2) In the vacuum induction furnace, raw materials are added sequentially according to the burning loss and volatilization characteristics of the alloy elements. The easy-to-oxidize alloy elements are added after they are fully deoxidized. The volatile alloy elements are added under the protection of the atmosphere or at the end of the smelting process. After smelting, an ingot with qualified composition is prepared.
[0029] (3) The prepared ingot is melted by vacuum consumable arc to further purify the material.
[0030] (4) Forging the ingot obtained in step (3), the initial forging temperature is 1150° C., the temperature is kept for 50 minutes, and the final forging temperature ...
Embodiment 3
[0035] (1) According to the composition ratio: Cr 3.0%, W 2.5%, V 0.20%, Ta 0.15%, Mn 0.50%, Si0.40%, C 0.10%, N 0.04%, P≤0.01%, S≤0.005% , O ≤ 0.005%, Al ≤ 0.01%, Ni ≤ 0.005%, Nb ≤ 0.001%, Co ≤ 0.005%, Cu ≤ 0.005%, Mo ≤ 0.005% (wt.%) and the burning loss ratio of the alloy raw materials.
[0036] (2) In the vacuum induction furnace, raw materials are added sequentially according to the burning loss and volatilization characteristics of the alloy elements. The easy-to-oxidize alloy elements are added after they are fully deoxidized. The volatile alloy elements are added under the protection of the atmosphere or at the end of the smelting process. After smelting, an ingot with qualified composition is prepared.
[0037] (3) The prepared ingot is melted by vacuum consumable arc to further purify the material.
[0038] (4) Forging the ingot obtained in step (3), the initial forging temperature is 1150° C., the temperature is kept for 50 minutes, and the final forging temperature...
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