In-situ synthesis TiC particle reinforced titanium-aluminum-molybdenum-ferrum alloy material and preparation method thereof
A particle-enhanced, in-situ synthesis technology, applied in the field of powder metallurgy, can solve the problems of limited application development, high manufacturing cost, complex process, etc., and achieve the effect of being beneficial to the densification process, increasing wear resistance, and inhibiting surface diffusion
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Embodiment 1
[0043] The preparation method (hollow cathode sintering method) for in-situ synthesis of TiC particle reinforced titanium-aluminum-molybdenum-iron alloy material of the present invention comprises the following steps:
[0044] 1) Ingredients: The alloy material is Ti-0.2%Al-2.7%Mo-1.1%Fe-0.5%C. Weigh 300-mesh aluminum powder, 800-mesh graphite powder, 600-mesh molybdenum powder, 300-mesh iron powder and 300-mesh titanium powder according to the alloy ratio.
[0045] 2) Ball milling and mixing: put the above-mentioned powder into a ball milling tank at a ball-to-material ratio of 5:1, and mill at a speed of 350r / min for 1h. In order to prevent the powder from oxidation during the ball milling process, the ball milling jar is filled with argon gas for protection. Then pass the ball-milled mixture through the 100-mesh sieve specified in GB / T6005.
[0046] 3) Pass the ball-milled and sieved mixture in step 2) through a bidirectional molded compact, and the molded pressure is 400...
Embodiment 2
[0059] This example is the same as Example 1, except that the alloy material prepared in step 1) is Ti-0.6%Al-2.5%Mo-0.8%Fe-1.5%C. Weigh 500-mesh aluminum powder, 1500-mesh graphite powder, 400-mesh molybdenum powder, 400-mesh iron powder and 500-mesh titanium powder according to the alloy ratio; the difference from step 2) is that the speed is 300r / min, and the ball milling time is 1.5h; The difference from step 3) is that the molding pressure used is 600Mpa; the difference from step 4) is that the distance between the blanks placed on the cathode is 20mm; the difference from step 5) is that the flow of argon gas is adjusted to make the furnace work The air pressure reaches 30Pa; the difference from step 6) is that it is sintered at a temperature of 1350°C for 6 hours, and the rest are the same as in implementation 1. The alloy material Ti-0.6%Al-2.5%Mo-0.8%Fe-1.5%C prepared by the above method has a flexural strength of 810Mpa, a relative density of 95%, and a hardness of 68...
Embodiment 3
[0061] This example is the same as Example 1, except that the alloy material prepared in step 1) is Ti-1.5%Al-2.8%Mo-0.7%Fe-1.0%C. Weigh 400-mesh aluminum powder, 2000-mesh graphite powder, 300-mesh molybdenum powder, 500-mesh iron powder and 400-mesh titanium powder according to the proportion of the alloy; the difference from step 2) is that the speed is 250r / min, and the ball milling time is 2h; Step 3) The difference is that the molding pressure used is 500Mpa; the difference from step 4) is that the distance between the blanks placed on the cathode is 15mm; the difference from step 5) is that the argon flow rate is adjusted to make the working pressure in the furnace reach 50Pa; the difference from step 6) is that it is sintered at a temperature of 1450°C for 4 hours, and the rest are the same as in implementation 1. The alloy material Ti-1.5%Al-2.8%Mo-0.7%Fe-1.0%C prepared by the above method has a flexural strength of 890Mpa, a relative density of 94%, and a hardness of...
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