Refractaloy 26 is Fe - NI - Co - Cr precipitation hardening type deformation of high temperature alloy, long-term use of C - 570 ℃ temperature range of 540 ℃, the highest temperature can reach 677 C, add element of a Cr, mo alloy solid solution strengthening, high to low titanium, aluminum form y aging strengthening phase, while drilling elements made of titanium, aluminum solubility in the solid solution is reduced, prompted y phase precipitation amount increase, so as to improve the thermal stability of y, reduce y 'phase of the stacking fault energy.
The composite properties of the alloy are superior, with excellent tensile resistance, force relaxation and creep resistance, no notch sensitivity.
Alloy |
% |
Ni |
Cr |
Fe |
Mo |
P |
Co |
C |
Mn |
Si |
S |
B |
Al |
Ti |
Refractaloy 26 |
Min. |
35.0 |
16.0 |
bal |
2.5 |
- | 18.0 | - | - | - | - | 0.001 | - | 2.5 |
Max. |
39.0 | 20.0 | 3.5 | 0.03 | 22.0 | 0.08 | 1.0 | 1.5 | 0.03 | 0.01 | 0.25 | 3.0 |
Density
|
8.2 g/cm³
|
Melting point
|
1200 ℃
|
Status
|
Tensile strength
Rm N/mm² |
Yield strength
Rp 0. 2N/mm² |
Elongation
As % |
Brinell hardness
HB
|
Solution +Aging
|
1000
|
550
|
20
|
331-262
(26-35.5)
|
The alloy has been used in the production of ground steam turbine enclosure, under the steam conditions of 540℃~570℃ can work for more than 100,000 hours, the use condition is good.Similar alloys are used abroad to make aero turbine engine complex parts and bladesThe alloy has good plasticity at medium temperature, which can reduce the fracture of parts due to durability and creep in long-term use.No TCP harmful phase was found in the alloy after long-term aging or long-term stress aging in the temperature range