High Temperature Heating Wire Nickel Alloy Cr20Ni30 Bright Nichrome Resistance Wire

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:

GH1140 Physical Properties:

GH1140 Mechanical Properties

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:

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:

• Aero Engine Components
• Structural parts of gas turbine combustor
• Turbine Engine combustion chamber components
• Afterburner Parts