Method for preventing extrusion damage of low-carbon cold heading steel wire rod

Abstract

The invention belongs to the technical field of metallurgy, and relates to a method for preventing extrusion damage of a low-carbon cold heading steel wire rod. The steel comprises the following chemical components in percentage by weight: 0.08-0.13% of C, less than or equal to 0.06% of Si, 0.30-0.60% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, more than or equal to 0.020% of Al and the balance of Fe and inevitable impurities. The method comprises the key process steps of coil rod collecting and cooling, online water-soluble antirust agent spraying and low-tonnage pressure belt bundling. The method is characterized in that the wire rod is rolled and cooled after being normally rolled, a water-soluble antirust agent is sprayed when the temperature of the wire rod ranges from 180 DEG C to 200 DEG C, low-tonnage pressure belt bundling is rapidly carried out, a mixing agent plays a lubricating role between rings of the wire rod during bundling and extruding, the rings of the wire rod are effectively prevented from being squeezed and damaged under the bundling pressure, the rings of the wire rod are tightly squeezed, and the quality of the wire rod is improved. And after being bundled, the mixture is not easy to loosen, and waste heat of the wire rod is utilized to volatilize the mixture.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metallurgy and relates to a method for preventing extrusion injury of low-carbon cold header steel wire rod. BACKGROUND

[0002] With the development of metallurgical technology, higher requirements are put forward for the surface quality of steel, and extrusion injury of low-carbon cold header steel wire rod is an important aspect of the surface quality of the wire rod, therefore, how to effectively solve the extrusion injury between the wire rod coils is a problem we are facing. Since the conventional operation cannot avoid the extrusion injury between the wire rod coils, it is of great significance to solve this problem. SUMMARY

[0003] To achieve the above-mentioned purpose, the application provides a method for preventing extrusion injury of low-carbon cold header steel wire rod, which solves the problems existing in the prior art.

[0004] The technical scheme adopted by the application is a method for preventing extrusion injury of low-carbon cold header steel wire rod, comprising the following process steps:

[0005] (1) Wire rod rolling and cooling: after normal rolling of the wire rod, the wire rod is collected and cooled to 180-200 DEG C;

[0006] (2) Spraying water-soluble rust inhibitor: uniformly mixing the water-soluble rust inhibitor with water at a ratio of 1:20, and then uniformly spraying the mixed agent on the inside and outside of the wire rod, with a spraying time of 30±5 seconds;

[0007] (3) Bundling: the bundling pressure is 8 tons, steel band bundling is adopted, and after bundling, the water-soluble rust inhibitor is volatilized by using the residual heat of the wire rod;

[0008] The chemical composition of the cold header steel is as follows: C: 0.08-0.13%, Si≤0.06%, Mn: 0.30-0.60%, P≤0.020%, S≤0.015%, Al≥0.020%, and the rest is Fe and unavoidable impurities.

[0009] Further, the water-soluble rust inhibitor is Yuxilu water-soluble rust inhibitor.

[0010] Preferably, in the wire rod rolling and cooling process, the wire rod is collected and cooled to 192 DEG C or 196 DEG C after normal rolling.

[0011] Preferably, in the water-soluble rust inhibitor spraying process, the spraying time is 30 seconds or 32 seconds.

[0012] The beneficial effects of the present application are: the present application is through the rod coil cooling + online water-soluble rust inhibitor + low-tonnage pressure belt packing. When the rod temperature is 180-200 DEG C, the mixed agent of water-soluble rust inhibitor and water 1:20 is sprayed by the spraying device, the mixed agent is uniformly sprayed in and out of the rod, and then the rod is quickly packed. The mixed agent plays a lubricating role between the coils of the rod during the packing extrusion, effectively prevents the extrusion injury between the coils of the rod under the packing pressure, and the coils of the rod are tightly extruded, and the rod is not easy to loosen after packing. The mixed agent is volatilized by the rod waste heat. The problem of extrusion injury of the low-carbon cold upsetting steel rod is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0014] Figure 1 is the water-soluble rust inhibitor product condition diagram;

[0015] Figure 2 is the rod packing condition diagram of the present application embodiment 1;

[0016] Figure 3 is the rod packing condition diagram of the present application embodiment 2;

[0017] Figure 4 is the spraying device product diagram. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.

[0019] A low-carbon cold upsetting steel rod anti-extrusion method, the chemical composition of the steel is as follows: C: 0.08-0.13%, Si≤0.06%, Mn: 0.30-0.60%, P≤0.020%, S≤0.015%, Al≥0.020%, the rest is Fe and inevitable impurities; comprising the following process steps:

[0020] (1) rod rolling cooling: after normal rolling of the rod, coil cooling to 180-200 DEG C;

[0021] (2) Spray water-soluble rust inhibitor: uniformly mix water-soluble rust inhibitor with water at 1:20, and then evenly spray the mixed agent on the inside and outside of the wire rod, spray for 30±5 seconds;

[0022] (3) Bundling: the bundling pressure is 8 tons, steel band bundling is adopted, and the water-soluble rust inhibitor is volatilized by using the wire rod afterheat after bundling.

[0023] It should be noted that the water-soluble rust inhibitor is Yuxilu water-soluble rust inhibitor, as shown in Figure 1 , purchased from Shanghai Yuxilu Chemical Industry Co., Ltd.

[0024] It should be noted that the evenly sprayed mixed agent is sprayed by using a purchased spraying device, as shown in Figure 4 , the spraying device is purchased from Shanghai Huisi Mechanical and Electrical Co., Ltd.

[0025] The following is further illustrated by combining with examples.

[0026] Example 1:

[0027] A method for preventing wire rod of low-carbon cold upsetting steel from being extruded, the chemical composition of the steel is as follows: C: 0.09%, Si: 0.04%, Mn: 0.44%, P: 0.013%, S: 0.005%, Al: 0.032%, and the rest is Fe and inevitable impurities.

[0028] The production process steps are as follows:

[0029] (1) Wire rod rolling and cooling: after normal rolling and coiling of the wire rod, the wire rod is cooled to 192°C;

[0030] (2) Spray water-soluble rust inhibitor: evenly spray the mixed agent of water-soluble rust inhibitor and water at 1:20 on the inside and outside of the wire rod, spray for 30 seconds;

[0031] (3) Bundling: the bundling pressure is 8 tons, steel band bundling is adopted.

[0032] The photo of the wire rod after bundling is shown in Figure 2 .

[0033] Example 2:

[0034] A method for preventing wire rod of low-carbon cold upsetting steel from being extruded, the chemical composition of the steel is as follows: C: 0.10%, Si: 0.05%, Mn: 0.45%, P: 0.011%, S: 0.004%, Al: 0.028%, and the rest is Fe and inevitable impurities.

[0035] The production process steps are as follows:

[0036] (1) Wire rod rolling and cooling: after normal rolling and coiling of the wire rod, the wire rod is cooled to 196°C;

[0037] (2) Spray water-soluble rust inhibitor: evenly spray water-soluble rust inhibitor mixed with water 1:20 on the inside and outside of the wire rod, spray for 32 seconds;

[0038] (3) Bundling: the bundling pressure is 8 tons, and steel band bundling is adopted.

[0039] The photo of the wire rod after bundling is shown in Figure 3 .

[0040] In summary, the application realizes the key process steps of wire rod collecting and cooling + online spraying water-soluble rust inhibitor + quickly performing low-tonnage pressure band bundling. The mixed agent plays a lubricating role between the wire rod rings during the bundling extrusion, effectively prevents the wire rod rings from being extruded and injured under the bundling pressure, and the wire rod rings are extruded tightly, so that the wire rod is not easy to loosen after bundling, and the mixed agent is volatilized by using the wire rod residual heat.

[0041] The above merely describes the preferred embodiments of the application, but not used to limit the protection scope of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A method for preventing crushing damage to low-carbon cold-heading steel wire rod, characterized in that, The process includes the following steps: (1) Cooling during wire rod rolling: After normal rolling, the wire rod is coiled and cooled to 180-200℃; (2) Spray water-soluble rust inhibitor: Mix water-soluble rust inhibitor with water at a ratio of 1:20, and then spray the mixture evenly inside and outside the wire rod for 30±5 seconds. (3) Bundling: The bundling pressure is 8 tons, and steel strips are used for bundling. After bundling, the water-soluble rust inhibitor is volatilized by the residual heat of the wire rod. The chemical composition of the cold heading steel by weight percentage is C: 0.08-0.13%, Si≤0.06%, Mn: 0.30-0.60%, P≤0.020%, S≤0.015%, Al≥0.020%, and the remainder is Fe and unavoidable impurities.

2. The method for preventing crushing damage to low-carbon cold-heading steel wire rod as described in claim 1, characterized in that, The water-soluble rust inhibitor is Yushilu water-soluble rust inhibitor.

3. The method for preventing crushing damage to low-carbon cold-heading steel wire rod as described in claim 2, characterized in that, In the wire rod rolling and cooling process, the wire rod is cooled to 192°C or 196°C after normal rolling and coiling.

4. The method for preventing crushing damage to low-carbon cold-heading steel wire rod as described in claim 2, characterized in that, In the process of spraying water-soluble rust inhibitor, the spraying time is 30 seconds or 32 seconds.

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