Method for preparing high-entropy alloy with non-uniform layered structure by using powder metallurgy method
A high-entropy alloy and layered structure technology, applied in the field of high-entropy alloys, can solve the problems of low operability, low internal bonding strength of heterogeneous high-entropy alloys, etc. strong effect
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Embodiment 1
[0044] High entropy alloy Fe 40 mn 40 co 10 Cr 10 Powder (with a particle size range greater than 175 μm and less than 200 μm) 150 g. Pour 150g of powder, 1250g of balls and 1g of stearic acid into a high energy ball mill jar. The set speed is 300r / min, and the ball milling is stopped for half an hour, and the total ball milling process is 24h.
[0045] Sieve the ball-milled powder, and select 100g of powder (2#) with a diameter less than 10 μm. Take 20g of fine powder and pave one layer, add 20g of the original 175μm powder (1#) to pave the second layer, repeat 5 times, and obtain a heterogeneous layered material with a cycle number of 5.
[0046] The material was sintered and kept at 1000°C for 3 hours under vacuum. Take out the air-cooled sample after sintering and keep it in a box furnace at 1000°C for 20 minutes, then carry out hot rolling. The next rolling is carried out with a total drawdown of 70%. After rolling, a dense non-uniform layered high-entropy alloy i...
Embodiment 2
[0048] Embodiment 2 (carry out hot rolling after sintering after cold pressing)
[0049] High entropy alloy Fe 40 mn 40 co 10 Cr 10 Powder (with a particle size range greater than 175 μm and less than 200 μm) 150 g. Pour 150g of powder, 1250g of balls and 1g of stearic acid into a high energy ball mill jar. The set speed is 300r / min, and the ball milling is stopped for half an hour, and the total ball milling process is 16h.
[0050] Sieve the ball-milled powder, and select 100 g of powder (3#) with a diameter less than 30 μm. Take 20g of medium-fine powder and spread one layer, add 20g of the original 175μm powder (1#) to spread the second layer, repeat 5 times, and obtain a heterogeneous layered material with a cycle number of 5.
[0051] The material was sintered and kept at 1000°C for 3 hours under vacuum. Take out the air-cooled sample after sintering and keep it in a box furnace at 1000°C for 20 minutes, then carry out hot rolling. The next rolling is carried out...
Embodiment 3
[0053] High entropy alloy Fe 40 mn 40 co 10 Cr 10 Powder (with a particle size range greater than 175 μm and less than 200 μm) 150 g. Pour 150g of powder, 1250g of balls and 1g of stearic acid into a high energy ball mill jar. The set speed is 300r / min, and the ball milling is stopped for half an hour, and the total ball milling process is 24h. Sieve the ball-milled powder, and select 100g of powder (2#) with a diameter less than 10 μm.
[0054] High entropy alloy Fe 40 mn 40 co 10 Cr 10 Powder (with a particle size range greater than 175 μm and less than 200 μm) 150 g. Pour 150g of powder, 1250g of balls and 1g of stearic acid into a high energy ball mill jar. The set speed is 300r / min, and the ball milling is stopped for half an hour, and the total ball milling time is 16h. Sieve the ball-milled powder, and select 100 g of powder (3#) with a diameter less than 30 μm.
[0055] Take the original high entropy alloy Fe 40 mn 40 co 10 Cr 10 Powder (1#) 100g.
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