Changzhou Victory Technology Co., Ltd |
Verified Suppliers
|
|
GH1140 is a solution-enhanced Fe-ni-based Superalloy:
In addition to large amounts of chromium, the alloy is combined with a small amount of tungsten, molybdenum, aluminum and titanium to strengthen solid solution. The alloy has moderate thermal strength, high plasticity, good thermal fatigue, microstructure stability and welding process performance.
GH1140 Supply Specifications:
Round bars, rods, strips, tubes, seats, spheres, flanges and forgings negotiated and supplied
GH1140 Chemical Composition:
alloy | C | Mn | Si | P | S | Cr | Ni | Mo | Ti | Al | Fe | other |
GH1140 | 0.06~0.12 | ≤0.7 | ≤0.8 | ≤0.025 | ≤0.015 | 20~23 | 35~40 | 2~2.5 | 0.7~1.2 | 0.2~0.6 | Allowance | W 1.4~1.8 Ce≤0.05 |
GH1140 Physical Properties:
Density | 8.1g/cm3 |
Room Rate Resistivity | ρ=1.07×10-6Ω·m |
Magnetic Properties | No |
GH1140 Mechanical Properties
Specifications | Indoor temperature | 800℃ | ||||
σb/MPa | δ/% | W / % | σb/MPa | δ/% | W / % | |
Bar material | 620 | 40 | 45 | 245 | 40 | 50 |
Hot Rolled Plate | 635 | 40 | 50 | 245 | 40 | 50 |
Cold Rolled Plate | 635 | 40 | - | 225 | 40 | - |
Pipe | 590 | 35 | - | - | - | - |
GH1140 oxidation Peeling:
When the flame barrel manufactured by the alloy is longer working than 900 ℃, it may produce oxidation spalling; The rate of oxidation peeling is 0.016mm/100h.In the middle segment of the flame tube, the oxidation spalling depth after long-term operation is: 200h/0.032mm;800h/0.127mm.
GH1140 oxidation rate in air medium:
θ/℃ | Oxidation rate /(g/m2·h) |
700 | 0.014 |
800 | 0.028 |
900 | 0.139 |
1000 | 0.270 |
1100 | 0.523 |
GH1140 Process performance and requirements:
Welding performance
Alloy has good welding process performance, can be used by hand argon arc welding, automatic tungsten argon arc welding, tungsten pulse argon arc welding and spot welding, seam welding, brazing and other methods to connect.
Parts Heat Treatment Process
1. Solid solution treatment is the only way of heat treatment for
semi-finished products and parts and assemblies of alloy.
2. The final heat treatment temperature of the part, according to
the working conditions of the part selection; When the alloy makes
the flame cylinder parts, its solution temperature is 1080℃±10℃;The
solution temperature of the afterburner part is 1150℃±10℃.The
intermediate heat treatment temperature is 1050℃±10℃, the solution
temperature of eliminating welding stress is 940 ℃ or higher.
3. After heat treatment, it can be air-cooled or water-cooled
according to the part shape.
4. Plate parts in the solution of the heat preservation time can be
selected according to the thickness of 5~20min.
Surface Treatment Technology:
After heat treatment, the surface of the part is oxidized, which is
eliminated by blowing sand or pickling. The single pickling process
of hydrofluoric acid-nitric acid-water solution was used to remove
the oxidized skin by pickling method, and the compound alkali
pickling process of sodium hydroxide-sodium nitrate and sulfuric
acid-sodium chloride-aqueous solution could also be used.
GH1140 application areas include: