A functionally graded single crystal blade material composed of two alloys, its preparation method and realization equipment
A single-crystal blade and functional gradient technology, which is applied in polycrystalline material growth, casting molding equipment, metal processing equipment, etc., can solve the problems that optimization still takes time, cannot meet the design requirements of aeroengines, and cannot achieve ultra-high temperature service, etc. , to achieve the effect of eliminating low-melting point phases between dendrites, uniform diffusion of solid-solution atoms, and precise control
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[0036] Based on the above-mentioned directional solidification equipment, the present invention also provides a method for preparing a functionally graded single crystal blade material composed of two alloys, combining figure 1 and figure 2 , the preparation method comprises the steps of:
[0037] In the first step, the top-cast blade formwork is prepared.
[0038] The single crystal blade 306 is placed upright with the top of the blade upward, and the single crystal is obtained by using the crystal lifter 301, the spiral crystal selector 302 and the single crystal amplifier 303, and a narrow channel 305 with a diameter of 0.8-1.2mm is designed to be placed horizontally on the adjacent Between the crystals 301, the height of the narrow channel 305 is 1 / 2 of the height of the crystals 301, so that the crystals 301 are connected to each other; the quality of the required Ni-based superalloy is calculated as the crystals 301, spiral crystal selection The sum of the volumes of ...
Embodiment 1
[0044] The prepared single crystal blade material blade root and leaf middle part selects the second generation Ni-based superalloy, and its composition (w.t.%) is: 7Cr-10Co-0.5Mo-3Re-6W-5.7Al-7Ta-bal.Ni (nearly disclosed Alloy CMSX-4); the top of the blade uses Ni 3 Al-based super high temperature alloy IC31 (patent application number: 201110125242X), its composition is: 3Cr-7Co-6Mo-3Re-2W-7Al-5Ta-bal.Ni. The specific preparation method is as follows:
[0045] The first step is to prepare the top pouring blade formwork 3:
[0046] The blade 306 is placed upright with the top of the blade facing upwards, using the crystal riser 301, the spiral crystal selector 302 and the single crystal amplifier 303 to obtain a single crystal, and a pipe with a diameter of 0.8-1mm is designed as a narrow channel 305 placed horizontally in the adjacent crystal riser Between the crystal risers 301, the height of the narrow channel 305 is 1 / 2 of the height of the crystal riser 301, see figure...
Embodiment 2
[0055] Using the preparation method provided by the present invention, the root and middle of the prepared single crystal blade material are selected from the second generation Ni-based superalloy, and its composition (w.t.%) is: 5Cr-10Co-1.5Mo-3Re-6W-5.4Al-9Ta- bal.Ni (close to the open alloy PWA1484); the top of the blade uses Ni 3 Al-based super high temperature alloy IC32 (patent application number: 201110125242X), its composition is: 6Cr-7Co-8Mo-3Re-2W-7.2Al-5.3Ta-bal.Ni, the specific preparation method steps are as follows:
[0056] The first step is to prepare the top-casting blade formwork 3. The blade 306 is placed upright with the top of the blade upward, and the single crystal is obtained by using the crystal riser 301, the spiral crystal selector 302 and the single crystal amplifier 303, and a pipe with a diameter of 1 mm is designed As the narrow channel 305 is placed horizontally between adjacent crystal risers 301, the height of the narrow channel 305 is 1 / 2 of ...
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