Customized processing of high purity niobium products
Release time:
2024-11-11
Niobium is a special rare transition metal with unique physical and chemical properties, which makes it widely used in some high-precision fields. However, due to its high melting point, high ductility and active surface characteristics, it has great challenges in processing.
- high melting point: Niobium has a melting point of about 2468°C and has excellent stability in high temperature environments, so it is often used in high temperature alloys and super alloys.
- Good corrosion resistanceNiobium has strong corrosion resistance in most acidic and alkaline environments, especially to sulfuric acid, hydrochloric acid and hydrofluoric acid.
- excellent superconductivityNiobium exhibits excellent superconductivity at low temperatures and is an important raw material for superconducting materials, widely used in superconducting magnets, nuclear magnetic resonance imaging (MRI) and other fields.
- high ductility: Niobium has good ductility at room temperature and low temperature, and can be processed into film or wire.
- Good biocompatibility: Due to its stability and low toxicity, niobium is also used in medical implants and prosthetic materials.
Processing Difficulty of Niobium Materials
- Work hardening: Niobium is prone to work hardening during processing, making the material more brittle and more difficult to continue processing. Therefore, it is necessary to control the cutting speed and tool to reduce the hardening phenomenon.
- High heat treatment requirements: Because niobium has a high melting point, the heat treatment process in processing requires higher requirements, otherwise it is easy to produce surface oxidation or micro cracks, affecting the performance of the material.
- easy oxidationNiobium easily reacts with oxygen and nitrogen at high temperatures to form brittle oxide and nitride layers. Therefore, it is necessary to carry out the process under a protective atmosphere to avoid oxidation.
- Difficult to cut: Niobium has high ductility and viscosity, which makes it easy to produce burrs and uneven surfaces during cutting and drilling, which requires precise tools and suitable cutting parameters.
- refractory fusion: The high melting point of niobium requires special processes and high-temperature equipment in welding, brazing and fusion processing, otherwise the ideal bonding strength may not be obtained.
In order to improve the processing efficiency and quality, we usually use specific coolants, protective atmospheres, and high-precision tools and cutting equipment for niobium processing operations. These equipment and process requirements also greatly increase the difficulty and cost of niobium processing, so the price of niobium products is always expensive.
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