Liquid suction casting preparation method of SiC fiber reinforced TiAl-based composite material

A composite material and fiber reinforced technology, which is applied in the field of liquid suction casting preparation of SiC fiber reinforced TiAl matrix composite materials, can solve the problems of high melt viscosity, poor fluidity, difficulty, etc., and achieve fast alloy solidification speed and reduce production. Cost, effect of avoiding interface reaction

Active Publication Date: 2019-06-04
江苏华钛瑞翔科技有限公司
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Problems solved by technology

Due to its high activity, titanium alloy is easy to react with the graphite nozzle in the traditional suction casting method, and the

Method used

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  • Liquid suction casting preparation method of SiC fiber reinforced TiAl-based composite material
  • Liquid suction casting preparation method of SiC fiber reinforced TiAl-based composite material
  • Liquid suction casting preparation method of SiC fiber reinforced TiAl-based composite material

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Example Embodiment

[0034] Example

[0035] In this embodiment, the selected base alloy composition is Ti-48Al-2Cr-2Nb, the prepared composite material is a round rod with a diameter of 9 mm and a length of 90 mm, and a bunch of SiC fibers is added within the range of the central diameter of the rod by 1 mm.

[0036] (1) Non-consumable vacuum arc smelting master alloy. Using Al-Nb master alloy, electrolytic Cr, Al flakes, and small particle sponge titanium as raw materials, calculate the required alloy element mass fraction according to the alloy composition atomic percentage, calculate the required mass of each alloy element, and prepare the alloy. Put the required raw materials into the water-cooled copper crucible in the electric arc furnace and vacuumize to 9.9×10 - 4 Pa, start the smelting under the protection of inert gas Ar, and repeat the smelting 6 times with electromagnetic stirring to ensure that the alloy ingot composition is uniform.

[0037] (2) Design of fiber volume fraction and distrib...

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Abstract

The invention relates to the field of casting and composite material preparation, in particular to a liquid suction casting preparation method of a SiC fiber reinforced TiAl-based composite material.The liquid suction casting preparation method solves the problems that the process of a traditional solid state preparation method is complicated, the cost is high, the composite material is prone tobe polluted to cause poor mechanical properties, and complicated parts are difficult to mold. The liquid suction casting preparation method comprises the steps of (1) non-consumable vacuum arc meltingof a master alloy, (2) fiber volume fraction and distribution design, (3) fiber tensioning and positioning, (4) vacuum suction casting, (5) hot isostatic pressing and the like, and the SiC fiber reinforced TiAl-based composite material is prepared. Compared with a conventional method, the composite material prepared by the liquid suction casting preparation method has the advantages of simple preparation process, few alloy defects, tight bonding of fiber and a matrix alloy, moderate reaction and cleanness and no pollution of the composite material.

Description

technical field [0001] The invention relates to the field of casting and preparation of composite materials, in particular to a method for preparing SiC fiber-reinforced TiAl-based composite materials by liquid suction casting. Background technique [0002] TiAl intermetallic compound is considered as an ideal lightweight high-temperature material because of its low density, high specific strength, high specific modulus, excellent creep resistance and oxidation resistance, and can be replaced between 600 ° C and 900 ° C Nickel-based superalloys are used to make aerospace structural parts and ground system rotating or reciprocating structural parts, which can greatly improve the thrust-to-weight ratio and fuel efficiency. It has been applied to the advanced aero-engine of GE Company of the United States, and the third-stage rotor blade of the high-speed three-rotor low-pressure turbine of the new geared fan engine. However, due to the significant decline in the high-temperat...

Claims

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Application Information

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IPC IPC(8): C22C47/12C22C49/11C22C49/06B22D18/06C22C101/14
Inventor 贾清沈莹莹王玉敏崔玉友杨锐
Owner 江苏华钛瑞翔科技有限公司
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