CN-121087360-B - Stress corrosion resistant anchor cable and preparation method thereof

CN121087360BCN 121087360 BCN121087360 BCN 121087360BCN-121087360-B

Abstract

The embodiment of the application discloses an anti-stress corrosion anchor cable and a preparation method thereof, and relates to the technical field of mine engineering support materials. The anchor cable comprises the following chemical components：C：0.75-0.85%, Si：0.20-0.31%, Mn：0.72-0.91%, P：0.009-0.018%, S：0.0055-0.0065%, Cr：0.19-0.30%, Ni：0.016-0.025%, V：0.033-0.039%, Mg：0.0004-0.0008%, Nb≤0.0005%, Al：0.0021-0.0029%, Ca：0.0003-0.0006%, Sn：0.0005-0.0010%, Co：0.0051-0.0062%, Ti：0.0034-0.0039%, Gd≤0.0005%, in percentage by mass, and the balance of Fe and unavoidable impurities. The embodiment of the application is suitable for mine engineering supporting scenes.

Inventors

LI YONGLIANG
DAI XIANGLIN
YANG RENSHU
GUO LIANG
ZHANG LONG

Assignees

中国矿业大学(北京)

Dates

Publication Date: 20260512
Application Date: 20250814

Claims (5)

1. The anti-stress corrosion anchor cable is characterized by comprising the following chemical components ：C：0.75~0.85%,Si：0.20~0.31%,Mn：0.72~0.91%,P：0.009~0.018%,S：0.0055~0.0065%,Cr：0.19~0.30%,Ni：0.016~0.025%,V：0.033~0.039%,Mg：0.0004~0.0008%,Nb≤0.0005%,Al：0.0021~0.0029%,Ca：0.0003~0.0006%,Sn：0.0005~0.0010%,Co：0.0051~0.0062%,Ti：0.0034~0.0039%,Gd≤0.0005%, in percentage by mass, and the balance of Fe and unavoidable impurities; the preparation method of the anchor cable comprises the following steps: Preparing raw materials according to the chemical components in percentage by mass, smelting the raw materials to obtain a steel billet, heating the steel billet to a first temperature, keeping the temperature for a first time to enable the steel billet to be completely austenitized, and then cooling the austenitized steel billet to a second temperature at a target rate; carrying out hot rolling treatment on the steel billet for specified times to obtain a wire rod, carrying out spray cooling on the wire rod to a third temperature, and carrying out cold drawing on the wire rod to a target diameter to obtain a steel wire; derusting the steel wire by using pickling solution, and then drying; Immersing the steel wire in a plating assistant liquid at a first designated temperature for a second time, immersing the steel wire in a zinc liquid at a second designated temperature for a third time, taking out the steel wire, water-cooling the steel wire to a third designated temperature, taking out the steel wire, and drying; twisting the dried steel wire with a preset helix angle and a preset strand number to obtain an anchor cable; The zinc liquid contains aluminum, aluminum in the zinc liquid and the steel wire are utilized to react preferentially, and an iron-aluminum alloy layer formed in the reaction process can be attached to the surface of the steel wire so as to inhibit the formation of an iron-zinc alloy layer on the surface of the steel wire; The first temperature range is 1100-1200 ℃, the first time is 1-2 h, the target speed is 5-8 ℃ per second, the second temperature is 780-820 ℃, the appointed times are 8-12 times, the third temperature is 400-440 ℃, the first appointed temperature is 50-70 ℃, the second time is 2-3 min, the second appointed temperature is 460-480 ℃, the third time is 5-10 s, and the third appointed temperature is 40-50 ℃.
2. The anchor cable according to claim 1, wherein the chemical components comprise ：C：0.79%,Si：0.25%,Mn：0.81%,P：0.015%,S：0.062%,Cr：0.25%,Ni：0.021%,V：0.037%,Mg：0.0005%,Nb：0.0003%,Al：0.0025%,Ca：0.0005%,Sn：0.0006%,Co：0.0056%,Ti：0.0036%,Gd：0.0003%, by mass percent of Fe and unavoidable impurities.
3. The anchor cable according to claim 1, wherein the chemical components comprise ：C：0.81%,Si：0.27%,Mn：0.84%,P：0.011%,S：0.059%,Cr：0.22%,Ni：0.022%,V：0.036%,Mg：0.0006%,Nb：0.0002%,Al：0.0026%,Ca：0.0004%,Sn：0.0008%,Co：0.0058%,Ti：0.0039%,Gd：0.0001%, by mass percent of Fe and unavoidable impurities.
4. The anchor cable of claim 1, wherein the mass ratio of Cr to Ni is 7 or more and/or the mass ratio of Cr to V is 4 or more.
5. The cable bolt of claim 1, wherein a surface of the cable bolt is coated with a zinc layer and the zinc layer is coated with an epoxy resin.

Description

Stress corrosion resistant anchor cable and preparation method thereof Technical Field The embodiment of the application relates to the technical field of mine engineering supporting materials, in particular to an anti-stress corrosion anchor cable and a preparation method thereof. Background The anchor cable is used as a core anchoring structure for controlling the surrounding rock of a roadway in mining engineering, is continuously transferred to a deep stratum along with mining activities, is subjected to high stress for a long time and is continuously exposed to mine water environment rich in various corrosive media such as chloride ions, sulfides, carbonates, microorganisms and the like. The continuous coupling action of the high tensile stress load and the corrosive medium can obviously promote the stress corrosion cracking risk of the anchor cable. By means of measures such as improving the toughness of the anchor cable steel matrix or increasing the arrangement density, the failure problem caused by the synergistic effect of high stress and strong corrosion environment is difficult to solve fundamentally. Disclosure of Invention In view of the above, the embodiment of the application provides an anti-stress corrosion anchor cable and a preparation method thereof, which are convenient for improving the anti-stress corrosion performance of the anchor cable. In a first aspect, an embodiment of the present application provides an anti-stress corrosion anchor cable, including the following chemical components ：C：0.75~0.85%,Si：0.20~0.31%,Mn：0.72~0.91%,P：0.009~0.018%,S：0.0055~0.0065%,Cr：0.19~0.30%,Ni：0.016~0.025%,V：0.033~0.039%,Mg：0.0004~0.0008%,Nb≤0.0005%,Al：0.0021~0.0029%,Ca：0.0003~0.0006%,Sn：0.0005~0.0010%,Co：0.0051~0.0062%,Ti：0.0034~0.0039%,Gd≤0.0005%, in percentage by mass, and the balance being Fe and unavoidable impurities. Optionally, the mass percentage of the chemical components is ：C：0.79%,Si：0.25%,Mn：0.81%,P：0.015%,S：0.062%,Cr：0.25%,Ni：0.021%,V：0.037%,Mg：0.0005%,Nb：0.0003%,Al：0.0025%,Ca：0.0005%,Sn：0.0006%,Co：0.0056%,Ti：0.0036%,Gd：0.0003%,, and the balance is Fe and unavoidable impurities. Optionally, the mass percentage of the chemical components is ：C：0.81%,Si：0.27%,Mn：0.84%,P：0.011%,S：0.059%,Cr：0.22%,Ni：0.022%,V：0.036%,Mg：0.0006%,Nb：0.0002%,Al：0.0026%,Ca：0.0004%,Sn：0.0008%,Co：0.0058%,Ti：0.0039%,Gd：0.0001%,, and the balance is Fe and unavoidable impurities. Optionally, the mass ratio of Cr to Ni is 7 or more, and/or the mass ratio of Cr to V is 4 or more. Optionally, a zinc layer is plated on the surface of the anchor cable, and epoxy resin is coated on the surface of the zinc layer. According to a second aspect, an embodiment of the application provides a method for manufacturing an anchor cable according to the first aspect, which comprises the steps of manufacturing raw materials according to the chemical components in percentage by mass, smelting the raw materials to obtain a steel billet, heating the steel billet to a first temperature, keeping the steel billet warm for a first time to enable the steel billet to be completely austenitized, cooling the austenitized steel billet to a second temperature at a target speed, carrying out hot rolling treatment on the steel billet for a designated number of times to obtain a wire rod, carrying out spray cooling on the wire rod to a third temperature, cold drawing the wire rod to a target diameter to obtain a steel wire, carrying out rust removal on the steel wire by using a pickling solution, then drying, immersing the steel wire in a plating assistant solution at the first designated temperature for a second time, immersing the steel wire in a zinc solution at the second designated temperature for a third time, taking out the steel wire, carrying out water cooling on the steel wire to the third designated temperature, drying the steel wire, and carrying out twisting on the dried steel wire at a preset strand helix angle and a preset number to obtain the anchor cable. Optionally, after the anchor cable is obtained, the method further comprises the steps of surface pretreatment, flushing and drying of the anchor cable, and coating the surface of the anchor cable with an epoxy resin coating with a specified thickness. Optionally, the zinc liquid contains aluminum, and the aluminum in the zinc liquid and the steel wire preferentially react, so that an iron-aluminum alloy layer formed in the reaction process can be attached to the surface of the steel wire, thereby inhibiting the formation of the iron-zinc alloy layer on the surface of the steel wire. Optionally, the plating assistant liquid is 200-300 g/L of zinc ammonium chloride, and the mass fraction of aluminum in the zinc liquid is 0.11-0.15%. Optionally, the first temperature range is 1100-1200 ℃, the first time is 1-2 h, the target speed is 5-8 ℃ per second, the second temperature is 780-820 ℃, the designated times are 8-12 times, the third temperature is 400-440 ℃, the target diameter is 10-