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First of all, look at its shape pass rate. The shape of special-shaped steel fiber conforms to the factory-specified shape as a percentage of the total fiber is called the shape pass rate. For steel fibers of other shapes except straight steel fibers, the shape qualification rate should not be less than 90%. 100 pieces of each batch of products are randomly sampled, and the shape of the steel fiber is checked one by one. If there are broken hooks, unilateral forming and other shape defects, it is regarded as unqualified, and the shape pass rate of the inspected steel fiber should not be less than 85%.
High Tenacity Steel Fiber
diameter or equivalent diameter, the deviation of the average value of the steel fiber diameter or equivalent diameter from its nominal value should not exceed +-10%. For the inspection of the diameter of the steel fiber of the circular cross-section, 10 pieces are randomly sampled in each batch, and the diameter is measured one by one with a vernier caliper (the measurement unit is mm, the accuracy is 0.02mm), and the deviation of the average value of the obtained diameter from its nominal value shall be Meet the requirements of the specified deviation. For the inspection of the equivalent diameter of the steel fiber of the non-circular section, the average equivalent diameter is determined by the quality method, and 100 steel fibers are randomly sampled in each batch, and the quality is measured with a balance with an accuracy of 0.01g. The vernier caliper with an accuracy of 0.02mm measures the length of the steel fiber one by one, and the deviation of the average equivalent diameter d(f) obtained by formula (1) from its nominal value should meet the requirements of the specified deviation.
The deviation of the length of the steel fiber from its nominal value should not exceed +-10. The inspection method randomly sampled 10 pieces from each batch of products, and measured the length with a caliper with an accuracy of not less than 0.02mm. The length deviation qualification rate should not be less than 90 %, the average of the length of 10 fibers should also meet the deviation requirements.
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