High Temperature Ferro Niobium
Niobium ferroalloy is a kind of superalloy with excellent high temperature strength and corrosion resistance, which is widely used in aviation, aerospace, energy and other fields. The main reason why niobium alloy can withstand high temperature is that it has the following advantages.
Description
Description
1. Niobium is a plastic metal, gray, with a body-centered cubic structure, and its density is: 8.57g/cm. Niobium and iron form the compound Fe3Nb2, which is soluble in large amounts of iron. The melting temperature of ferroniobium is close to 1600 degrees (1570-1650 degrees).
2. Niobium and carbon form NbC, its melting temperature is 3500~3800 degrees, and its hardness is 9~10Mohs. Its excellent properties are a good additive for making alloy tool steel.
3. Application of niobium in amorphous industry, magnetic source metal.
4. Application of niobium in permanent magnet materials: The addition of niobium improves the crystal structure of NdFeB materials, refines the grain structure, and increases the coercive force of the material; it plays a unique role in the oxidation resistance of the material. effect. Magnetic source metal.
5. Ferroniobium production process: usually produced by thermite reduction method: raw ore - sintering - inspection - purification - inspection - crushing - packaging - inspection - storage. Reaction molecular formula:
3Nb2O5+10Al=6Nb+5Al2O3
Specification
|
Chemistry/Grade |
FeNb-D |
FeNb-B |
|
|
Ta+Nb≥ |
60 |
65 |
|
|
Less than (ppm) |
Ta |
0.1 |
0.2 |
|
Al |
1.5 |
5 |
|
|
Si |
1.3 |
3 |
|
|
C |
0.01 |
0.2 |
|
|
S |
0.01 |
0.1 |
|
|
P |
0.03 |
0.2 |
|
Ferroniobium is mainly used for smelting high-temperature (heat-resistant) alloys, stainless steel and high-strength low-alloy steel.
Niobium in stainless steel and heat-resistant steel combines with the carbon in the steel to form stable niobium carbide.
Evenly distributed on the grain boundaries of steel, it prevents the grain growth of steel at high temperatures, refines the structure of steel, and improves the strength, toughness and creep properties of steel.
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Hot Tags: high temperature ferro niobium
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