Gh2132 alloy is a Fe-25Ni-15Cr based superalloy, which is added with molybdenum, titanium, aluminum, vanadium and trace boron. It has high yield strength and long-lasting, creep strength below 650 ° C, and has good processing plasticity and satisfactory welding performance. Suitable for the manufacture of high-temperature bearing components for aerospace engines operating at temperatures below 650 °C, such as turbine disks, compressor disks, rotor blades and fasteners. The alloy can be used to produce a variety of shape-deformed products such as discs, forgings, plates, rods, wires and rings.
I. Overview
1. Variety specifications and status: Bars, plates, wires, discs and ring parts of various specifications can be supplied. Bar, round cake and ring blank are not heat treated; hot-rolled plate and cold-rolled plate are solid solution + pickling; cold-drawn bar is solution-dissolved + pickled; cold-twisted wire can be solid solution + pickled disk, or solid Dissolved + pickled straight strip, or solid solution straight strip off polishing and cold drawing, etc.; cold drawn wire in cold drawn state, or solid solution + pickling, or semi-hard state.
2. Melting and casting process: The alloy can be smelted by non-vacuum induction + electroslag, electric arc furnace + electroslag and electric arc furnace + vacuum arc and vacuum induction + vacuum arc.
3. Application overview and special requirements: In the aviation, it is mainly used for engine compressor discs, turbine discs, bearing rings, casings, shafts, fasteners, and plate welding bearing parts working below 650 °C. . In China, the alloy has been widely used in aviation.
GH2132 material grade GH2132 (GH132)
GH2132 is similar to A-286 PQA286 UNSS66286 (USA), ZbNCT25 (France), GH2132 (GH132) China
GJB 2611-1996 "High-alloy cold drawn bar specifications for aviation"
GJB 2612-1996 "Specifications for high temperature alloy cold drawn wire for welding"
GJB 3020-1997 "Aerospace high temperature alloy ring blank specification"
GJB 3165-1998 "Specifications for hot-rolled and wrought bars of superalloys for aerospace bearing parts"
GJB 3167-1998 "Specifications for cold drawn wire for high temperature alloys for cold heading"
GJB 3317-1998 "High-alloy hot-rolled sheet specification for aviation"
GJB 3782-1999 "High-speed forging and rolling round cake specification for aviation"
GB/T 14992-2005 "High Temperature Alloy Grade Standard"
GB/T14993-1994 "High-temperature alloy hot rolled bar for rotating parts"
GB/T14994-1994 "High-temperature alloy cold drawn bar"
GB/T14995-1994 "High-temperature alloy hot rolled sheet"
GB/T14996-1994 "High-temperature alloy cold-rolled sheet"
GB/T14996-1994 "High-temperature alloy cold-rolled sheet"
GB/T14997-1994 "High-temperature alloy forged round cake"
GB/T14998-1994 "High Temperature Alloy Blanks"
GB/T15062-1994 "General purpose high temperature alloy tube"
Second, the chemical composition
1. The chemical composition of the alloy is shown in Table 1-1.
Table 1-1
Note: 1 The standard for cold drawn rods, round cakes and ring blanks (Ti) is 1.80%~2.35%.
2 Hot-rolled and cold-rolled sheet standards (B) 0.003%~0.010%, (Mn)≤2.00%, (P)≤0.020%, (S)≤0.015%.
3 cold drawn wire standard (Al) ≤ 0.35%, (Ti) 1.75% ~ 2.35%, (Si) 0.40% ~ 1.00%, (P) ≤ 0.020%, (S) ≤ 0.015%.
4 The standard for cold wire is 1.75%~2.35%, (Si)0.40%~1.00%, (P)≤0.025%, (S)≤0.020%.
5 Standard for hot rolled and forged bars (Cu) ≤ 0.25%.
2. Heat treatment system The heat treatment system specified in the material standards is shown in Table 1-2; the high-quality alloy heat treatment system is 900 °C ± 10 °C, 1-2 h, oil cooling + 750 ° C ± 10 ° C, 16 h, air cooling.
Table 1-2
Note: The standard of cold pull rod and cold twisted wire stipulates that when the performance test fails, it can be no more than 760 °C for 16h, and it can be delivered after passing the test.
Third, physical and chemical properties
Thermal performance
Melting temperature range: 1364～1424°C
Thermal conductivity is shown in Table 1-3
Table 1-3
The coefficient of linear expansion is shown in Table 1-4.
Table 1-4
The linear expansion coefficient of high quality alloy is shown in Table 1-5.
Table 1-5
2. Density: Ï=7.93g/cm3
3. Electrical performance
The resistivity is shown in Table 1-6.
Table 1-6
4. Magnetic properties
5. Chemical properties
Oxidation resistance
Oxidation rate of alloy after 100-300 h test in air medium Table 1-7
Table 1-7
Fourth, metallographic organization
Under the standard heat treatment condition, the alloy has a spherical uniform dispersion of NI3(Ti,Al) type γ' phase and TiN, TiC, and there is a trace amount of M3B2 at the grain boundary. There may be a small amount of η phase and L phase near the grain boundary.
V. Process performance and requirements
1. The alloy has good forgeability, the forging heating temperature is 1140 ° C, and the final forging is 900 ° C.
2. The average grain size of the alloy is closely related to the degree of deformation of the forging and the final forging temperature.
3. The alloy has satisfactory welding performance. The alloy is welded in a solid solution state and subjected to aging treatment after welding.
Lithium Tetrafluoroborate (LiBF4) is white or yellowish powder, easily soluble in water, carbonate solvent and ethers compounds. The melting point of LiBF4 is 293-300℃, with the relative density of 0.852g/cm3.LiBF4 has excellent chemical and thermal stability and is mainly used as an additive in LiPF6 based electrolyte system to improve cycle life and performance of lithium batteries.
Lithium Tetrafluoroborate
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