A method for detecting scale peeling performance of hot-rolled wire rod

Abstract

The invention provides a method for detecting the scale peeling performance of hot-rolled wire rods. The straightened hot-rolled wire rod samples are clamped on a wire torsion testing machine, and then the samples are twisted 90-180 degrees on one side by using the wire torsion testing machine. °; during the torsion process, the sample fell off due to the poor deformability of the scale, and the scale that fell off was collected, weighed, and recorded as m; the scale that fell off was screened with a 6‑8 mesh sieve, and the large scale that was screened out was screened. The size of the scale is weighed and recorded as m1; the scale peeling performance of the hot-rolled wire rod is evaluated by calculating the peeling performance index (D), D=m1 / m. The invention effectively simulates the continuous bending of the wire rod in different directions in mechanical peeling, and considers the influencing factors of the scale peeling performance evaluation of the wire rod, by introducing the peeling performance index (D), taking into account the scale peeling amount and scale size, It can accurately evaluate the scale peeling performance of the wire rod, and the operation is simple and the result is accurate.

Description

technical field [0001] The invention belongs to the field of metal material analysis, and relates to a method for detecting the scale peeling performance of hot-rolled wire rods. Background technique [0002] In the subsequent deep processing of hot-rolled wire rods, metal products companies generally use pickling or mechanical peeling to remove the scale. Pickling is the use of acid solution to remove scale on the steel surface. This method will produce a large amount of waste acid, acid-containing wastewater, acid residue, etc., which will pollute soil, water and air if not handled properly. Mechanical peeling is to continuously bend the wire rod in different directions, and the scale will fall off from the surface of the wire rod due to poor deformation ability. The whole process basically eliminates environmental protection problems. Therefore, with the continuous improvement of environmental protection requirements, metal product enterprises gradually increase the prop...

AI Technical Summary

Problems solved by technology

This method has the following defects: 1. The inspection steps of this method are cumbersome, and there are steps such as cleaning and drying. The risk of human error in these steps is relatively large, which will seriously affect the accuracy of the inspection results.

2. This method has limitations in evaluating the scale peeling rate of wire rods; the scale peeling performance of wire rods is not only related to the amount of scale peeled off, but also closely related to the size of scale peeled off

If this method is used to test the scale peeling performance of wire rods, the amount of scale peeled off is large, but the scale is mainly powdery or all of which are powdery. The test results of the wire rod evaluate the scale peeling effect is good, while the actual mechanical peeling The effect is very poor

3. This method detects the scale peeled off during the axial uniform deformation stage during the stretching process, but the wire rod does not deform during the actual mechanical peeling process, but continuously bends in different directions. This method is different from the principle of mechanical peeling Larger and thus cannot accurately characterize the mechanical descaling and descaling properties of the wire rod

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