Incoloy 903 is a low-expansion superalloy, which is a Ni-Fe-Co-based alloy reinforced with NB. Titanium and aluminium elements. Its outstanding characteristics are low coefficient of thermal expansion, almost unchanged modulus of elasticity, high temperature resistance, excellent thermal fatigue performance, and embrittlement resistance in high-pressure hydrogen environment. As a result, the alloy is widely used in aero engine compressors, turbines, and components for the main rocket engines of the space shuttle.
Chemical Composition;
c：≤0.05
mn：≤0.20
si：≤0.20
p：≤0.015
s：≤0.015
b：0.005-0.010
nb：2.70-3.50
ti：1.35-1.75
fe: margin.
al：0.70-1.15
co：14.00-17.00
ni：36.00-39.00
Incoloy 903 superalloy machining technology: 1Hot working: Incoloy 903 superalloy has good thermoplasticity and can be plastically deformed at high temperatures. Commonly used hot working processes include hot extrusion, hot rolling, hot forging, etc. These thermal processes help to improve the plasticity of the material and achieve the desired shape and size. 2.Cold working: Although Incoloy 903 has good cold working properties, it can be relatively difficult due to its high hardness and toughness. Cold working, which typically includes cold rolling, cold drawing, and cold bending, can be used to achieve the desired shape and size. 3.Welding: Incoloy 903 can perform common welding methods such as arc welding, TIG welding, and MIG welding. During the welding process, attention should be paid to controlling the heat input and preheating temperature to avoid excessive thermal stress and deformation. 4.Heat treatment: Heat treatment can improve the structure and properties of Incoloy 903. Common heat treatment processes include solution treatment, aging treatment, and annealing. These heat treatment processes can be used to improve the strength, hardness, and corrosion resistance of alloys. 5.Machining: Incoloy 903 presents certain challenges in the use of cutting tools due to its high hardness and toughness. In cutting, the appropriate cutting speed, feed rate and cutting lubricant should be selected to obtain good machining results. Incoloy 903 alloy is mainly composed of nickel, chromium, cobalt, aluminum, titanium and other elements, of which aluminum and titanium are its characteristic elements, which can form a strong solution strengthening phase, thereby improving the strength and corrosion resistance of the alloy. The alloy has excellent high-temperature strength, good thermal fatigue and creep properties, excellent corrosion resistance and oxidation stability. In addition, the alloy has good machinability and weldability.
Heat treatment system;
840 10 Keep warm for 1 hour, air cooled +720 Keep warm for 8 hours at 55 per hour to 620 for 8 hours, air cooled, HBS 415-341
Density: 823
Chemical Composition;c 0.015~0.050
cr 8.00~10.00
ni remains. co 3.00~7.00
w 8.50~10.50
al 5.25~5.75
ti 1.00~2.60
fe 0.50
nb 1.30
ta 2.50~3.50
zr 0.007
b 0.005
s 0.002
p 0.01
mn 0.20
si 0.20
cu 0.10
o 0.0015
n 0.0015
ag 0.0005
as 0.001
bi 0.0001
mg 0.003
sb 0.001
sn 0.001
pb 0.0005
zn 0.005
cd 0.00002
ga 0.003
ln 0.00002
se 0.0005
te 0.0002
ti 0.00002
th 0.001