an alcrfe 2 ni 2 c 0.24 High entropy alloy and its preparation method
A technology of high-entropy alloys and buttons, applied in the field of high-entropy alloys, can solve the problems of high manufacturing costs of high-entropy alloys, achieve excellent mechanical properties, eliminate casting defects, and reduce segregation of alloy elements
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Embodiment 1
[0038] A kind of AlCrFe 2 Ni 2 C 0.24 The preparation method of high entropy alloy comprises the following steps:
[0039] In step S1, the reaction raw materials are weighed by atomic percentage.
[0040] The raw materials for the reaction are aluminum block, chromium block, iron block, iron powder, nickel block and carbon powder. During the batching process, the amount of burning loss should be reserved for each element, and the oxide scale should be removed from the aluminum block, chromium block, iron block and nickel block.
[0041] In addition, it is required that the particle size of the carbon powder is nano-scale, the purity is more than 99.9%, and the purity of other elements is more than 99.99%.
[0042] A total weight of 60 g of reaction raw materials was weighed by atomic percentage. Among the reaction raw materials, Al is 16.03%, Cr is 16.03%, Fe is 32.05%, Ni is 32.05%, and C is 3.84%. During the batching process, the burning loss of each element should be ...
Embodiment 2
[0051] Example 2, using the same method as Example 1 to carry out AlCrFe 2 Ni 2 C 0.24 The preparation of high-entropy alloys differs only in:
[0052] In step S2, the rotating speed of the ball mill is set to 200r / min, the ratio of the ball to the material is set to 6:1, the mixing of at least 12h is carried out, and the rotation of the ball mill is changed every 1h to ensure the uniform mixing of the reaction raw materials. Then, the uniformly mixed reaction material was placed on a hydraulic press, and under the action of a pressure of 40 MPa, the reaction material was pressed into a round cake-like body in a mold.
[0053] In step S5, the annealing temperature is 600°C.
Embodiment 3
[0054] Example 3, using the same method as Example 1 to carry out AlCrFe 2 Ni 2 C 0.24 The preparation of high-entropy alloys differs only in:
[0055] In step S2, the rotating speed of the ball mill is set to 150r / min, the ball-to-material ratio is set to 8:1, the mixing of at least 12h is carried out, and the rotation of the ball mill is changed every 3h to ensure the uniform mixing of the reaction raw materials. Then, the uniformly mixed reaction material is placed on a hydraulic press, and under the action of a pressure of 35 MPa, the reaction material is pressed into a round cake-like body in a mold.
[0056] In step S5, the annealing temperature is 850°C.
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