In the tungsten wire processing process, reducing impurities is a key step to improve the quality and performance of tungsten wire. The following are some effective methods to reduce impurities in the tungsten wire processing process:
- Raw material selection and processing
Select high-purity raw materials:
Select Tungsten raw materials with high tungsten content and low impurity content, such as high-purity tungsten powder or tungsten bars, reduce the introduction of impurities from the source.
Raw material pretreatment:
The raw materials are cleaned, pickled and other pretreatment steps are carried out to remove oxides, grease and other contaminants on the surface.
- Chemical treatment and purification
Pickling treatment:
In the manufacturing process of tungsten wire, pickling with pickling liquids such as nitric acid and hydrofluoric acid is used to remove oxides and impurities on the surface of tungsten wire.
After pickling, it should be fully cleaned to remove residual acid to avoid corrosion of tungsten wire.
Leaching and ion exchange:
In some tungsten wire production processes, such as alkaline hydrolysis to treat raw materials, leaching operations are required to remove impurities.
The use of ion exchange resin beds can further purify the solution and remove anionic impurities in the solution.
- Control during processing
Control the processing environment:
Maintain the cleanliness of the processing environment to avoid the introduction of pollutants such as dust and oil.
In the process of wire drawing and drawing, clean equipment and tools should be used to avoid cross contamination.
Optimize processing technology:
Strictly control the process parameters such as temperature, drawing speed, and drawing length during processing to reduce the generation and accumulation of impurities.
Use appropriate annealing and heat treatment processes to improve the internal structure and performance of tungsten wire and reduce the negative impact of impurities.
- Surface treatment and testing
Passivation treatment:
Form a protective oxide film on the surface of tungsten wire to prevent oxidation and impurity intrusion during storage or use.
Quality inspection:
Quality inspection of processed tungsten wire, including dimensional measurement, mechanical property testing, and surface quality inspection.
Use advanced testing equipment and methods, such as electron microscopes and spectral analysis, to accurately detect and control the impurity content.
- Other precautions
Prevent cross contamination:
Cross contamination should be strictly prevented during the processing of different batches of tungsten wire.
Use special equipment and tools, and clean and disinfect the equipment and tools regularly.
Employee training and awareness enhancement:
Regularly train and enhance employees to understand the impact of impurities on the performance of tungsten wire and the importance of reducing impurities.
Encourage employees to actively participate in quality control and continuous improvement activities.
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