A series of strict inspections are required for cut-resistant tungsten wire in production to ensure that its quality meets relevant standards and requirements. The following are some of the main inspection items:
- Raw material inspection
Composition inspection: Check the content of various elements in the tungsten wire to ensure that it meets the specified standards. For example, for doped tungsten wire, it is necessary to check whether the type and content of the doping elements meet the standards.
Appearance inspection: Check whether there are defects such as cracks, scratches, oxidation, etc. on the surface of the tungsten wire, and whether the diameter is uniform.
- Production process inspection
Stretching process inspection: During the stretching process, it is necessary to regularly check the performance indicators of the tungsten wire such as diameter, tensile strength, and elongation to ensure the stability and consistency of the stretching process.
Heat treatment inspection: For heat-treated tungsten wire, it is necessary to inspect its heat treatment effect, such as grain size, organizational structure, etc., to ensure that the heat treatment process achieves the predetermined goal.
- Finished product inspection
Dimension inspection: Use measuring tools such as vernier calipers to check whether the diameter, length, and other dimensions of the tungsten wire meet the requirements. For photovoltaic resistant tungsten wire, there are strict regulations on its specifications and diameter tolerances. For example, for 35μm tungsten wire, the diameter tolerance must be controlled within ±0.5μm.
Mechanical properties inspection:
Tensile strength inspection: The tensile strength of the tungsten wire is tested by a tensile testing machine to ensure that it meets or exceeds the specified standards. For example, the tensile strength of photovoltaic resistant tungsten wire must reach 6000MPa or above.
Breaking force inspection: Test the force required for the tungsten wire to break during the stretching process to evaluate its ability to withstand external forces.
Linearity inspection: Check the straightness of the tungsten wire to ensure that the length of its natural droop within a certain length meets the standard. This helps to evaluate the stability and accuracy of the tungsten wire during the cutting process.
Physical properties inspection:
Ovality inspection: Use tools such as microscopes to check the cross-sectional shape of the tungsten wire to ensure that its ellipticity is within the allowable range. This helps to ensure the uniformity and consistency of the tungsten wire during the cutting process.
Fracture toughness inspection: The fracture toughness of the tungsten wire is evaluated by specific test methods to understand its ability to resist crack propagation.
Surface quality inspection: Check again whether there are scratches, oxidation and other defects on the surface of the tungsten wire, and whether the color is uniform. For photovoltaic resistant tungsten wire, its surface quality has an important impact on the cutting effect.
Packaging and labeling inspection: Check whether the packaging of the tungsten wire is intact and whether the label is clear and accurate. This helps to ensure that the tungsten wire is not damaged during transportation and storage, and facilitates the traceability of its source and specifications.
- Special inspection (if necessary)
Corrosion resistance inspection: For tungsten wire that needs to be used in specific environments, such as high temperature, high humidity or corrosive environment, corrosion resistance inspection is required.
Electrical performance inspection: For tungsten wires for certain special purposes, such as leads in electronic devices, electrical performance inspections such as resistivity and conductivity are required.
More details of tungsten wires, please visit website: http://tungsten.com.cn/tungsten-wires.html
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