【BRIEF INTRODUCTION】With the development of society, high-quality rectangular tube factories have occupied a more important position in this era. For party rectangular tubes, we share a quality inspection method here, as we all know

With the development of society, high-quality rectangular tube factories have occupied a more important position in this era. For party rectangular tubes, we share a quality inspection method here, as we all know, quality is the most important thing. Very guaranteed to ensure quality or quality in certain areas.

1. High quality square tube chemical composition analysis: Chemical analysis methods, instrumental analysis methods (infrared C-S instrument, direct reading spectrometer, zcP, etc.). 1. Infrared C-S instrument: Analyze ferroalloys, raw steelmaking data, and C and S elements in steel. Direct reading spectrometer: batch sampling of C, Si, Mn, P, S, Cr, Mo, Ni, Cn, A1, W, V, Ti, B, Nb, As, Sn, Sb, Pb, Bi ③ N-0 instrument: analyzing the gas content of N and O.

2. For the geometric dimensions and shape of high-quality rectangular tubes, please refer to: Side rectangular tubes. Check the thickness: micrometer, ultrasonic thickness gauge, with both ends not less than 8. Steel pipe outer diameter, elliptical view: caliper, vernier caliper, ring gauge, measure the maximum point and the minimum point. Square tube length view: steel tape, manual, effective length measurement. The bending of the side moment tube can be seen in:, horizontal scale scale (1m), feeler gauge, and thin line. Measure the total length and bending degree per meter of twisting.

3. High quality rectangular tube outer quality: Artificial eye inspection: Lighting conditions specifications, experience side recognition, rectangular tube rolling. Non destructive testing view: Ultrasonic testing UT: The uniformity of various materials and data on internal cracks are more sensitive. Specification: GB/T577-1996 Grade: C5 ET: (b Eddy current detection electromagnetic induction) Mainly points to the disadvantage of being sensitive to (hole shape). Specification: GB/T7735-2004 Grade: B Grade c. Magnetic particle MT and magnetic flux leakage testing: Magnetic testing, suitable for detecting the appearance and defects of ferromagnetic data. Specification: GB/T12606-1999 Grade: C4 grade d. Electromagnetic ultrasonic testing: Without the need for coupling media, it can be applied to the surface inspection of high temperature, high speed, rough, and dry steel pipes. Penetrant testing: fluorescence and staining to detect the appearance of steel pipe defects. Steel management performance inspection: tensile test: measurement of stress and deformation, determination of data strength (YS, TS) and plastic target (A, Z) longitudinal, transverse sample tube segments, arc shaped, circular samples (III-10, III.5) small diameter, thin-walled large diameter, thick wall fixed distance. Note: The elongation of the sample after fracture is related to the sample size.