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| >For gas turbine use |
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>For impeller use |
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| These ceramic cores for precision casting offer
excellent stability at high temperatures. Used for manufacturing
high-precision moving blades and stationary ones for gas turbines
and jet engines, these ceramic cores contribute greatly to engine
efficiency. They also allow assembling by jointing in manufacturing
complex-shaped objects like cores for pump impellers. |
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Material
|
N-200 |
N-605 |
MD |
LC-11 |
N-405 |
| Major constituents |
SiO2-ZrSiO4 |
SiO2-Al2O3 |
SiO2-ZrSiO4 |
SiO2-Al2O3 |
SiO2 |
| Trace impurities
(ppm) |
| Pb |
<25 |
<25 |
<25 |
<25 |
<25 |
| Bi |
<1 |
<1 |
<1 |
<1 |
<1 |
| Ag |
<1 |
<1 |
<1 |
<1 |
<1 |
| Characteristic
values |
| Porosity (%) |
30.0 |
33.0 |
34.0 |
35.0 |
32.0 |
| Water absorption
(%) |
17.5 |
22.0 |
20.0 |
23.5 |
22.0 |
| Thermal expansion
% at 1,000°C |
0.25 |
0.25 |
0.25 |
0.10 |
0.10 |
| Manufacturing method |
Low-pressure
injection |
High-pressure
injection |
High
pressure injection |
High
pressure injection |
Extrusion |
| Transverse rupture
strength (Mpa) |
| at RT |
7 |
7 |
10 |
5 |
7 |
| at 1,000°C |
24 |
20 |
22 |
20 |
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| Size/Shape/Quantity |
Large/Complex/Medium |
Small/Complex/Large |
Small/Complex/Large |
Small/Complex/Large |
Single
section/large |
| Selection is made from among the above materials on the basis of the molten metal temperature, casting materials, and shape (size) of the cast product specified in the customer’s request. |
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