Rapid detection method for surface oxide scale adhesion of hot rolling strip steel

Abstract

The invention discloses a rapid detection method for surface oxide scale adhesion of hot rolling strip steel, and the rapid detection method comprises the following steps: 1) taking the hot rolling strip steel to prepare a test sample, and cleaning the surface of the test sample; 2) taking an adhesive tape with an adhesive function and with a size smaller than the test sample size, calculating the area S of the adhesive tape, and weighing the weight m1 of the adhesive tape; 3) pasting the adhesive tape closely to one side of the test sample, then bending the test sample for testing with the adhesive tape pasted side of the test sample being a bending outer surface and with the bending angle alpha being 5-180 degrees; 4) removing the adhesive tape from the surface of the bend test sample, weighing the weight m2 of the adhesive tape adhering with oxide scales, calculating the weight difference m2-m1 of the adhesive tape after pasting and the adhesive tape before pasting; and 5) characterizing the oxide scale adhesion with (m2-m1) / S namely, the ratio of the weight difference of the adhesive tape after pasting and the adhesive tape before pasting to the area of the adhesive tape before pasting. The rapid detection method has the advantages of high detection accuracy, rapid determination of the oxide scale adhesion strength and simple detection process, and is suitable for industrial production and application.

Description

technical field [0001] The invention relates to metallurgical technology, in particular to a method for quickly detecting the adhesion of oxide scales on the surface of hot-rolled steel strips. Background technique [0002] The traditional method of removing scale on the surface of hot-rolled strip steel is pickling. In recent years, with the improvement of environmental protection and energy-saving requirements, users have requested to provide steel plates that can be directly stamped without pickling. Therefore, the technology of hot-rolled pickling-free steel The research on the surface of the hot-rolled steel strip emerged as the times require, and its purpose is to make the surface scale have good adhesion by controlling the structure and thickness of the scale on the surface of the hot-rolled strip steel. There is no need to use shot blasting or pickling to remove the surface oxide scale on the steel surface. After the subsequent paint coating, this product has no effe...

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Problems solved by technology

[0003] In the development of pickling-free steel technology, how to evaluate the adhesion of surface oxide scale is one of the key technologies. At present, two methods are often used for comprehensive evaluation: the first is to use scanning electron microscopy to analyze the structure of the scale on the surface of the steel strip. Analysis and thickness measurement are used to judge the adhesion of oxide scale. This method has the disadvantages of long sampling, sample preparation and detection time and high cost. It is only suitable for laboratory research and is not suitable for large-scale production detection; A kind of is the method that adopts cold bending test to measure the area of ​​the peeled oxide scale, such as: in CN102107223A, at first get a sample on the strip steel, adopt the method of three-point bending to carry out the bending test, then stic

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