FeCoCrNiMn-containing high-entropy alloy and preparation method thereof
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A high-entropy alloy and alloy technology, applied in the field of metal materials, can solve the problem of low performance of TiZrHfNb alloy and achieve the effect of improving strength
Active Publication Date: 2018-03-06
FUJIAN UNIV OF TECH
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However, the performance of the nitrogen-strengthened TiZrHfNb alloy obtained by this method is not high
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Embodiment example 1
[0025] Alloy containing 0.1 mole of N element: FeCoCrNiMnN 0.1 Alloy 350g, preparation method comprises the steps:
[0026] 1) Equipped with raw materials: 21.48g of ferrochrome nitride, Fe62.27g, Co73.2g, Cr52.1g, Ni72.9g, Mn68.23g, Mn is easy to volatilize during the smelting process, and the amount of Mn added can be increased appropriately.
[0027] 2) Melting: CoCrFeMnNi N0.1 high-entropy alloy was prepared by LG505 induction magnetic levitation furnace under argon protection. Put the prepared alloy raw materials into the furnace, close the furnace door, evacuate, then fill with argon, and turn on the electricity to start melting. The samples were smelted at least 5 times to ensure uniform alloy composition.
[0028] 3) Forging and solution treatment of the alloy: heat the smelted ingot to 1000-1100°C for forging, and then forge the forged FeCoCrNiMnN 0.1 The high-entropy alloy is subjected to solution treatment at 1100°C for 6 hours to remove surface oxide scale.
[...
Embodiment 2
[0032] Alloy containing 0.05 moles of N element: FeCoCrNiMn N 0.05 Alloy 350g.
[0033] 1) Equipped with raw materials: 10.77g of ferrochrome nitride, Fe65.98g, Co73.38g, Cr58.48g, Ni73.08g, Mn68.4g, Mn is easy to volatilize during the smelting process, and the amount of Mn added can be increased appropriately.
[0034] 2) Melting: CoCrFeMnNi N was prepared by using LG505 induction magnetic levitation furnace under the protection of argon. 0.05 High entropy alloys. Put the prepared alloy raw materials into the furnace, close the furnace door, evacuate, then fill with argon, and turn on the electricity to start melting. The samples were smelted at least 5 times to ensure uniform alloy composition.
[0035] 3) Forging and solution treatment of the alloy: heat the smelted ingot to 1000-1100°C for forging, and then forge the forged FeCoCrNiMnN 0.05 The high-entropy alloy is subjected to solution treatment at 1100°C for 6 hours to remove surface oxide scale.
[0036] 4) Rollin...
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Abstract
The invention discloses a FeCoCrNiMn-containing high-entropy alloy which is prepared from the following components in percentage by atom: 5-35% of iron, 5-35% of cobalt, 5-35% of chromium, 5-35% of nickel, 5-35% of manganese and 0.01-0.3% of nitrogen. A preparation method of the FeCoCrNiMn-containing high-entropy alloy comprises the following steps: dosing; smelting: smelting with an induction magnetic levitation furnace, a vacuum arc furnace or a vacuum induction furnace, and preparing a CoCrFeMnNiNx high-entropy alloy under argon protection; putting the prepared alloy raw materials into thefurnace, closing the furnace door, vacuumizing, introducing argon and electrifying to start smelting; smelting a sample repeatedly for at least 5 times so as to ensure uniformity of the alloy components; forging the smelted ingot, and performing solution treatment on the forged FeCoCrNiMnNx high-entropy alloy by preserving heat for 6h at 1,100 DEG C; rolling the high-entropy alloy block; preserving heat of the rolled alloy for 6h at 800 DEG C, taking out the alloy and cooling in air. According to the FeCoCrNiMn-containing high-entropy alloy disclosed by the invention, the alloy strength is obviously improved on the premise of keeping high plasticity.
Description
【Technical field】 [0001] The invention belongs to the technical field of metal materials, and specifically refers to a nitrogen-containing FeCoCrNiMn high-entropy alloy and a preparation method thereof. 【Background technique】 [0002] High-entropy alloys are new types of metal materials with unique composition design concepts. They generally contain five or more alloying elements, and the content of each alloying element is often in equimolar ratio. The unique composition makes high-entropy alloys have unique properties. Through reasonable composition and process design, high-entropy alloys can exhibit superior comprehensive properties unmatched by traditional alloys, such as high strength and hardness, excellent wear resistance and corrosion resistance. Performance, high temperature oxidation performance, good thermal stability. [0003] FeCoCrNiMn high-entropy alloy is a typical high-entropy alloy, which has good plasticity and toughness, but its strength is low. Interst...
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