GH4037 (GH37) alloy is an austenitic aging-strengthened nickel-based alloy. About 4% of aluminum and titanium are added in total to form γ-phase for aging strengthening, and more tungsten and molybdenum are added for solid solution strengthening, and a trace amount of Boron strengthens grain boundaries. The alloy is used below 850 ºC, has high thermal strength, good comprehensive performance and microstructure stability, is widely used in the manufacture of aero-engine turbine blades, and is used for a long time below 800-850 ºC.
Alloy properties
* Ease of processing
* It has high thermal strength, good comprehensive performance and tissue stability at 850ºC
* It has high oxidation resistance at 850ºC, and the tissue is stable for long-term use
* Aero-engine turbine working blades suitable for long-term use below 800~850ºC
* Good welding performance
Application field
Due to its moderate thermal strength and good thermal fatigue properties below 850 °C, it can be widely used in various high-demand occasions.
* Aero engine
* Combustion chamber
* Afterburner parts
* Acid environment
* Turbine rotor blades
Standard
2.1, similar grades
Зи617 XH70BMTTЮ (Russia)
2.2. Implementation standards
GB/T 14992-2005 "Superalloy Grade Standard"
GB/T14993-1994 "Superalloy Hot Rolled Bars for Rotating Parts"
GB/T14994-1994 "Superalloy Cold Drawn Bars"
GB/T14995-1994 "Superalloy Hot Rolled Sheet"
GB/T14996-1994 "Superalloy Cold Rolled Sheet"
GB/T14996-1994 "Superalloy Cold Rolled Sheet"
GB/T14997-1994 "Superalloy Forged Round Cake"
GB/T14998-1994 "Superalloy Blanks"
Chemical composition
Ni Cr Fe C Mn Si Mo Al Ti V P Cu Ce B W S
minimum Remain 13 0.03 2.00 1.70 1.80 0.10 5.00
maximum value Remain 26 5.0 0.10 0.50 0.40 4.00 2.30 2.30 0.50 0.015 0.07 0.020 0.020 7.00 0.010
Physical properties
3.1. GH4037 (GH37) Density
ρ=8.4g/cm3
3.2, GH4037 (GH37) melting temperature range
1278~1346ºC
Machining and Heat Treating
4.1. Metallographic structure
The microstructure of the alloy in the standard heat treatment state is austenite matrix and dispersed precipitation γ phase, there are a small amount of M23C6 and M6C carbides in the grain boundaries, and there are massive MC carbides in the grains.
4.2. Process performance and requirements
1. The alloy has good forgeability, the forging heating temperature is 1140ºC, and the final forging is 1100ºC.
2. The average grain size of the alloy is closely related to the deformation degree and final forging temperature of the forging.
3. During the heat treatment of the blade, it needs to be heated slowly, and the step heating curve is used to heat up to the solid solution temperature, and the temperature control should be strict. In order to stabilize the performance of the blade, special attention should be paid to the cooling rate during the secondary solid solution not being too fast.
4. After the blade is machined, in order to eliminate the residual stress in the surface layer if necessary, the heaviest finished parts should be subjected to stress relief tempering. , and then air-cooled. Subsequently, it was aged at 800°C for 8h and air-cooled. After this specification treatment, not only can the residual stress on the blade surface be eliminated, but also the notch sensitivity can be improved.
,
Company Profile
Test Equipment :
Company strength:
Certificate:
Welcome to contact us,thanks
Our products sales all over the world as well. From the following two websites you can also get more information about our company:
http://xingda-alloy.en.made-in-china.com
http://xingda-alloy.en.made-in-china.com
Welcome to contact us,thanks
Audited Supplier 
){kind=link}
){kind=link}