Method for in-situ preparation of TiBO2 reinforced magnesium-based composite material
A technology of particle reinforcement and in-situ preparation, which is applied in the field of composite materials, can solve problems such as difficult control, and achieve the effects of easy control, uniform distribution, and low preparation cost
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Embodiment 1
[0021] Preparation of 4vol% TiB 2 Reinforced magnesium matrix composites
[0022] Powder K 2 TiF 6 and KBF 4 and cryolite Na 3 AlF 6 well mixed. Two kinds of salt K 2 TiF 6 and KBF 4 Mixed according to the stoichiometric ratio of Ti:B 1:2, cryolite Na 3 AlF 6 The content is 5wt% of the total amount of powder, and preheated at 250°C for 1 hour after mixing. The metal aluminum ingot is heated to about 850°C to melt, and is kept homogenized for 10 minutes. The mixed powder was added into the molten aluminum and stirred at a speed of 200r / min for 60 minutes. After the stirring is stopped, let it stand for 20 minutes, remove the slag, and obtain TiB 2 -Al master alloy. Magnesium Alloys in Mixed Gas SF 6 and CO 2 It is melted at 800°C under the protection of protection. After melting the magnesium alloy, TiB 2 -Al master alloy is slowly added to the magnesium alloy. Implement stirring, the stirring speed is 200r / min, and the stirring time is 30 minutes. After sti...
Embodiment 2
[0024] Preparation of 2vol%TiB 2 Reinforced magnesium matrix composites
[0025] Will K 2 TiF 6 and KBF 4 and cryolite Na 3 AlF 6 The powder is mixed well. Two kinds of salt K 2 TiF 6 and KBF 4 Mixed according to the stoichiometric ratio of Ti:B 1:2, cryolite Na 3 AlF 6 The content is 20wt% of the total amount of powder, and preheated at 100°C for 5 hours after mixing. The Al ingot is heated to about 800°C to melt, and is kept homogenized for 30 minutes. The mixed powder is added to the molten aluminum with constant stirring. The stirring time is 10min, and the stirring speed is 1000rpm. After the stirring is stopped, let it stand for 10 minutes, remove the slag, and obtain TiB 2 -Al master alloy. Magnesium Alloys in Mixed Gas SF 6 and CO 2 It is melted at 700°C under the protection of protection. After melting the magnesium alloy, TiB 2 - The Al master alloy is slowly added to the constantly stirring magnesium alloy. Stir for 10 minutes at a stirring speed...
Embodiment 3
[0027] Preparation of 1vol% TiB 2 Reinforced magnesium matrix composites
[0028] Will K 2 TiF 6 and KBF 4and cryolite Na 3 AlF 6 The powder is mixed well. Two kinds of salt K 2 TiF 6 and KBF 4 Mixed according to the stoichiometric ratio of Ti:B 1:2, cryolite Na 3 AlF 6 The content is 10wt% of the total amount of mixed powder, and preheated at 200° C. for 3 hours after mixing. The Al ingot is heated to about 700°C to melt, and is kept homogenized for 20 minutes. The mixed powder is added to the molten aluminum and stirred. The stirring time is 30min, and the stirring speed is 400rpm. Stop stirring after the reaction, let it stand for 30 minutes, remove the slag, and obtain TiB 2 -Al master alloy. Magnesium Alloys in Mixed Gas SF 6 and CO 2 It is melted at 850°C under the protection of protection. After melting the magnesium alloy, TiB 2 -Al master alloy is slowly added to the molten magnesium alloy. Stir for 60 minutes at a stirring speed of 600 rpm. After...
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