Corrosion resistance of flat partsThe corrosion resistance of the flat part is determined by conducting a neutral salt spray test or a cyclic corrosion test on samples with an adhesion amount of 180g/m2, 275g/m2, 320g/m2, or other values.During the test time or cycle period, red rust should not appe
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The tensile test of the square rectangular tube material must first prepare the tensile sample according to the standard, install it in the chuck of the tensile testing machine, and then slowly apply uniaxial tensile stress to the sample until the sample is broken. Through this test, we can judge th
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The appearance of scale in the hot rolling process of the square rectangular tube will affect its surface quality, and it will also have a great impact on the subsequent cold rolling process. In order to solve this problem, we can proceed from the following four aspects:(1) Controlling the rolling t
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In order to improve the surface hardness and wear resistance of square rectangular tubes, surface treatment can be carried out, that is, flame surface quenching, high and medium frequency surface quenching, and chemical heat treatment. Generally speaking, high-frequency and medium-frequency surface
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