GH3128 Material introduction
GH3128 It is a Ni Cr based solution strengthened deformed superalloy, and the service temperature is below 950 ℃. 16% w (W+Mo) was added to the alloy for solution strengthening, and boron, cerium and zirconium were added to purify and strengthen the grain boundary. The alloy has high plasticity, high endurance and creep strength, good oxidation resistance, stamping and welding process properties, and its comprehensive properties are superior to those of similar nickel based solution strengthened alloys such as GH3044 and GH3536. It is suitable for making flame tube, afterburner shell and other components of aeroengine combustion chamber that work at 950 ℃ for a long time. The main products are cold rolled sheet, hot rolled sheet, bar, forging, wire and pipe.
The alloy has been used in the manufacture of aeroengine flame tube, diffuser, afterburner, tail nozzle, regulator, stabilizer, diffuser and gas pipe, etc. The batch production and use are good. The alloy is also widely used in temperature thermocouple protection tube, fluxgate, magnetometer probe, framework material, W and Mo reduction sintering material boat, rail locomotive precombustion chamber nozzle and other structural parts under high temperature oxidation atmosphere.
W-2 enamel layer can be used for effective protection of parts when working at high temperature. The alloy has μ Phase precipitation.
GH3128 chemical composition
element | C | Cr | Ni | W | Mo | Al | Ti | Fe |
mass fraction／% | ≤0.05 | 19.0-22.0 | more than | 7.5-9.0 | 7.5-9.0 | 0.4-0.8 | 0.4-0.8 | ≤2.0 |
element | Zr | B | Ce | Si | P | S | Mn |
|
mass fraction／% | ≤0.06 | ≤0.005 | ≤0.05 | ≤0.8 | ≤0.013 | ≤0.013 | ≤0.5 |
|
GH3128 Physical and mechanical properties
density | melting point |
8.81g/cm3 | 1340～1390℃ |
varieties | Sample status | θ/℃ | tensile property | Persistent performance |
σb/MPa | δ5/% | σ/MPa | δ/mm | t/h | δ5/% |
Not less than |
Hot rolled plate | Delivery status | 20 | 735 | 40 | - | - | - | - |
Delivery status＋1200℃，Air cooling | 950 | 175 | 40 | - | - | - | - |
Cold-rolled sheet | Delivery status | 20 | 735 | 40 | - | - | - | - |
Delivery status＋1200℃，Air cooling | 950 | 175 | 40 | standardⅠ 54 | >1.2 ≤1.2 | ≥23 ≥20 | Measured Measured |
standardⅡ 39 | ≥1.5 <1.5～1.0 ≤1.0 | ≥100 ≥80 ≥70 | Measured Measured Measured |
GH3128 Heat treatment system
A)Cold rolled and hot rolled sheets，（1140~1180）℃／AC，The heat preservation time depends on the thickness of the plate：
B)plate(δ15mm~65mm)，（1180~1200）℃／AC，The heat preservation time depends on the thickness of the plate；
C)Hot rolled and forged bars，(1140~1200) ℃/AC×(1.5~2 ) h/AC。
D)Cake material，（1180~1200）℃/AC，The heat preservation time shall be selected to ensure that the parts can be fully heat permeable, solid solution or meet the annealing requirements。
