Gh3128 / Nickel-Based Alloy That Is Solid Solution Strengthened with Tungsten and Molybdenum and Strengthened with Boron, Cerium and Zirconium / Gh128 /

• Application: Industrial
• Standard: GB, ASTM
• Purity: >99.5%
• Alloy: Alloy
• Powder: Not Powder
• Transport Package: Wooden
• Model NO.: XD-215
• Origin: Jiangsu Baoying
• HS Code: 7505120000
• Production Capacity: 500ton/Year

Product Description

GH128 (GH3128) is a nickel-based alloy that is solid solution strengthened with tungsten and molybdenum and strengthened with boron, cerium and zirconium. .

Its comprehensive performance is superior to similar nickel-based solid solution alloys such as GH3044 and GH3536.

It is suitable for manufacturing the combustion chamber flame tube, afterburner casing, regulating plate and other high-temperature parts of aero-engines that work for a long time at 950 °C.

The main products are cold-rolled sheets, and hot-rolled sheets, bars, Forgings, wire and tubing.

The solution temperature in the delivery state is 1140-1180ºC, and it is air-cooled.

The high temperature performance is tested after supplemental solution treatment at 1200ºC.

Cold rolled sheet 0.8~4.0mm, hot rolled sheet 4~14mm, cold drawn wire Φ0.3~10mm.

Cold-rolled sheet and hot-rolled sheet are in solution and pickling; welding wire is in cold drawn, semi-hard or solid solution and pickling state.

Non-vacuum or vacuum induction furnace plus electroslag remelting.

The alloy is suitable for the manufacture of aero-engine combustion chamber and afterburner parts that work below 950 °C, and the use effect is good.

Chemical composition

Table 1-1 %
C  ≤ 0.05
Cr 19.0-22.0
Ni  Balance
W 7.5-9.0
Mo  7.5-9.0
Al  0.40-0.80
Ti  0.40-0.80
Fe  ≤ 0.2
B   ≤ 0.005
Zr  ≤ 0.06
Ce   ≤ 0.05
Mn  ≤ 0.50
Si  ≤ 0.80
P    ≤ 0.013
S    ≤ 0.013

1.5, GH3128 (GH128) application field

· Aero-engine combustion chamber flame tube, afterburner shell, regulating plate
· Structural parts of gas turbine combustion chamber
· Turbine engine combustion chamber parts
· Afterburner parts

Performance requirements

Thermal performance

2.1.1, GH3128 (GH128) Melting temperature range 1340~1390ºC

2.1.2, GH3128 (GH128) thermal conductivity see table 2-1 table 2-1

θ / ºC                         100         200        300       400       500     600      700     800    900      950

λ / (W / (m • C) )       11.30     12.56      14.24    15.49    16.75  18.42   19.68  21.35  23.02   23.86

2.1.3. Linear expansion coefficient of GH3128 (GH128) See Table 2-2

Table 2-2
θ / ºC                18~100    18~200    18~300    18~400   18~500   18~600   18~700   18~800    18~900    18~1000

a / (10-6C-1)       11.25       11.86       12.68       12.80      13.37       13.68      14.46     15.19        15.66       15.29

2.1.4 Thermal diffusivity see Table 2-3

Table 2-3
θ / ºC                    25      100     200     300    400    500    600    700    800

Q / (10-6m2/s)   2.30    2.49    2.78    3.08   3.39   3.69   3.88    3.92   4.16

density: 
ρ=8.81g/cm3

Resistivity

Table 2-4
θ / ºC                  17      850     900     950   1000    1050    1100    1150
p / (10-6Ω.M)   1.37    1.42    1.39    1.40     1.39    1.38     1.38     1.39

Magnetic energy type:
Alloy non-magnetic

Chemical properties
2.5.1. Antioxidant performance of GH3128 (GH128) The oxidation rate after 100h test in air medium is shown in Table 2-5

Table 2-5
θ / ºC                   900     1000   1100
Oxidation rate   0.055   0.236   0.269

Metallographic structure
The alloy is a single-phase austenite structure in the solid solution state, and contains a small amount of fine and uniform distribution of TiN and M6C.

Process performance and requirements

1. The furnace temperature should not be higher than 700°C during ingot forging, and the final forging temperature should be higher than 900°C.

2. The average grain size of the alloy is closely related to the deformation degree and final forging temperature of the forging.

3. The alloy can be welded by argon arc welding, spot welding, seam welding and other methods. 

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