ods-fe 3 Al alloy, alloy product and preparation method thereof
A technology of ods-fe3al and alloy, which is applied in the field of metal materials and alloys, can solve the problems of difficult precipitation and precipitation, and achieve the effects of uniform crystal phase structure, stable application, excellent oxidation resistance and corrosion resistance
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Embodiment 1
[0059] Example 1 ODS-Fe 3 Preparation of Al alloy sheet
[0060] (1) Use a vacuum induction furnace to smelt Fe whose composition is Fe-28at.%Al-(2at.%~5at.%)Cr 3 The Al alloy matrix is kept at 1620°C to 1680°C for 5 minutes; it is poured into a graphite crucible by top pouring to obtain an alloy matrix ingot with a diameter of 50mm;
[0061] It is remelted in the vacuum chamber of the argon atomization powder making equipment, and the molten liquid passes through the nozzle to form a liquid flow, which is broken into droplets in the high-pressure argon flow, condensed and cooled into powder; the powder is screened under the protection of argon, and the electrostatic Remove the inclusions by using the method to obtain Fe with a size of 50 μm to 100 μm 3 Al alloy matrix powder.
[0062] (2) Fe 3 Al alloy matrix powder and Y 2 o 3 Nano powder by composition Fe-28at.%Al-(2at.%~5at.%)Cr-0.2at.%Y 2 o 3 Perform batching; under the protection of argon, use a stirring high-e...
experiment example 1
[0067] Experimental Example 1 ODS-Fe 3 Microstructure Characterization of Al Alloy Sheets
[0068] dispersed oxide particles
[0069] Adopt FEITecnai G2 F20 type transmission electron microscope to observe the ODS-Fe prepared in embodiment 1 3 Al alloy plate samples, the results are as follows figure 1 shown. Depend on figure 1 can be found, Y 2 o 3 The particles are spherical in appearance, diffusely distributed in the alloy plate, and the distribution is relatively uniform, and the particle size is about 1nm to 3nm.
[0070] ODS-Fe 3 Microstructure of Al alloy sheet
[0071] Adopt the Olympus GX71 type metallographic microscope to observe the ODS-Fe that prepares in the embodiment 1 3 The cross-section of the Al alloy plate sample, the results are as follows figure 2 shown. Depend on figure 2 It can be found that the sheet has a discoidal grain structure with an average grain size of 1 mm.
experiment example 2
[0072] Experimental example 2 ODS-Fe 3 Properties Characterization of Al Alloy Sheet
[0073] With the ODS-Fe prepared in embodiment 1 3 Al alloy plates were used as samples, and their durability at 1000°C was investigated.
[0074] ODS-Fe 3 The Al alloy plate was processed into a durable sample, and the durability of the sample was tested in an atmospheric environment at 1000 °C by using an RC-1130 durable creep tester. The results are listed in Table 1.
[0075] Table 1 2.5mm thick ODS-Fe 3 Durability of Al Alloy Sheets at 1000℃
[0076]
[0077] From the data in Table 1, it can be found that at 1000°C, the 2.5mm thick ODS-Fe 3 Under the stress of 30MPa, the durability time of Al alloy sheet can reach more than 100h in both transverse and longitudinal directions; Can reach more than 30h. Visible, the ODS-Fe provided by the present invention 3 Al alloy sheets have good and durable mechanical properties at 1000 °C.
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