Processing technology of tensile corrosion-resistant steel wire rope

Abstract

The invention relates to the technical field of steel wire ropes, in particular to a processing technology of a tensile corrosion-resistant steel wire rope, which comprises the following steps: selecting alloy steel as a raw material of the steel wire rope, and sequentially carrying out primary wire drawing, quenching, galvanizing treatment and secondary wire drawing on the alloy steel to obtain a pretreated steel wire; the preparation method comprises the following steps: preparing a protective solution from composite silicon dioxide, modified polyurethane, trimethylolpropane tri (3-mercaptopropionate), a photoinitiator and a solvent, carrying out dipping treatment on the pretreated steel wires and the rope core in the protective solution, then carrying out photocuring to prepare treated steel wires and rope cores with super-hydrophobic, wear-resistant and corrosion-resistant surfaces, stranding 2-4 treated steel wires during stranding, and finally, carrying out cold rolling on the stranded steel wires to obtain the super-hydrophobic, wear-resistant and corrosion-resistant steel wire rope with the super-hydrophobic, wear-resistant and corrosion-resistant steel wire rope with the super-hydrophobic, wear-resistant and corrosion-resistant surfaces. 3-6 treated steel wires are stranded to serve as inner-layer steel wires, then 3-6 treated steel wires are stranded to serve as outer-layer steel wires, the inner-layer steel wires surround the treated rope core to be twisted in the same direction, and the outer-layer steel wires surround the inner-layer steel wires to be twisted, formed and bent alternately.

Description

Technical Field

[0001] The present invention relates to the technical field of wire ropes, and specifically to a processing technology for a tensile and corrosion-resistant wire rope. Background Art

[0002] A wire rope generally refers to a wire rope prepared by twisting multiple layers of steel wires into wire strands and covering a rope core. Due to its high strength, light self-weight, stable operation, and not being prone to sudden breakage, it is widely used in fields such as machinery, chemical industry, metallurgy, mining, oil and gas extraction, aerospace, etc. However, with the deterioration of the service environment and the increase in service time, problems such as corrosion, wear, and broken wires will occur in the wire rope, and even affect production safety.

[0003] The anti-corrosion of wire ropes has always been a hot research topic in the industry. The existing market usually uses coating treatment to improve its surface corrosion resistance, but there are problems such as low adhesion and single function. Summary of the Invention

[0004] The purpose of the present invention is to provide a processing technology for a tensile and corrosion-resistant wire rope to solve the problems in the prior art.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A processing technology for a tensile and corrosion-resistant wire rope includes the following steps: S1: Taking alloy steel as the raw material, performing primary wire drawing treatment, quenching, surface galvanizing treatment, and secondary wire drawing treatment to obtain pre-treated steel wires; S2: Preparing a protective liquid with composite silica, modified polyurethane, trimethylolpropane tris(3-mercaptopropionate), a photoinitiator, and a solvent; S3: Immersing the pre-treated steel wires and the rope core in the protective liquid, taking them out and performing photocuring treatment to obtain treated steel wires and a treated rope core; S4: Performing Z-shaped strand twisting on 2 - 4 treated steel wires to obtain inner-layer steel wires; performing Z-shaped strand twisting on 3 - 6 treated steel wires to obtain outer-layer steel wires; S5: Twisting the inner-layer steel wires around the treated rope core in the same direction, twisting the outer-layer steel wires around the inner-layer steel wires alternately, forming and bending to obtain a tensile and corrosion-resistant wire rope.

[0006] Further, the working conditions of the quenching treatment are: the temperature is 580 - 600 °C.

[0007] Further, the thickness of the galvanized layer formed after the surface galvanizing treatment is 30 - 50 nm.

[0008] Further, by mass parts, the composition of the protective liquid is as follows: 1 - 5 parts of composite silica, 6 - 11 parts of modified polyurethane, 1 - 3 parts of trimethylolpropane tris(3 - mercaptopropionate), 0.5 - 1 part of photoinitiator, and 17 - 27 parts of solvent.

[0009] Further, the solvent is one or a mixture of ethyl acetate, tetrahydrofuran, and dimethylformamide.

[0010] Further, the working conditions for the photocuring treatment are: irradiation with light of wavelength 365 nm for 3 min.

[0011] Further, the preparation of the composite silica includes the following steps: (1) Mix hydroxylated multi - walled carbon nanotubes, ethanol, and deionized water, add concentrated ammonia water, ultrasonically disperse for 50 - 60 min, add a mixture of tetraethyl orthosilicate and ethanol, stir at 18 - 25 °C for 17 - 18 h, add ethanol, acetic acid, and vinyltriethoxysilane, continue stirring for 5 - 6 h, centrifuge, wash, and dry to obtain hybrid silica; (2) In a nitrogen environment, mix a fluorinated azide copolymer, hybrid silica, and N - methylpyrrolidone, keep warm in an oil bath at 128 - 132 °C for 92 - 96 h, cool, filter by suction, wash, and dry to obtain composite silica.

[0012] Further, the preparation of the modified polyurethane includes the following steps: 1) Under nitrogen protection, mix polycarbonate diol, polytetrahydrofuran ether diol, polyether diol, and isophorone diisocyanate, heat up to 88 - 92 °C and keep warm for 1 - 2 h, cool down to 43 - 47 °C, add 1,6 - hexanediol, trimethylolpropane, 1,4 - butynediol, ethyl acetate, and dibutyltin dilaurate, and continue to keep warm for 6 - 8 h to obtain alkynylated polyurethane; 2) In a nitrogen atmosphere, mix alkynylated polyurethane, fluorinated azide copolymer, and N,N - dimethylformamide, ultrasonically disperse for 20 - 30 min, add copper sulfate pentahydrate and sodium ascorbate, and stir for 6 - 8 h to obtain modified polyurethane.

[0013] Further, the preparation of the fluorinated azide copolymer includes the following steps: A. Mix 4-aminophenol, deionized water, and concentrated hydrochloric acid, stir at 0 °C for 4-6 min, add a mixed solution of sodium nitrite and deionized water, continue stirring for 15-20 min, add a mixed solution of sodium azide and deionized water, continue stirring for 80-100 min, raise the temperature to 18-25 °C and keep warm for 11-12 h, extract with dichloromethane, dry, add triethylamine, add methacryloyl chloride at 0 °C, raise the temperature to 18-25 °C and keep warm for 11-12 h, extract with deionized water, rotary evaporate, and perform column chromatography separation with petroleum ether and ethyl acetate in a volume ratio of 10:1 to obtain 4-azidophenyl methacrylate; B. Under vacuum conditions, mix 4-azidophenyl methacrylate and eosin Y, add triethylamine, ethyl α-bromopropylacetate, perfluorooctyl methacrylate, and tetrahydrofuran, stir for 11-12 h under irradiation of a 5W blue LED lamp, pour into methanol, filter, and dry to obtain a fluorinated azide copolymer.

[0014] Furthermore, the rope core is one of sisal, jute, cotton thread, polyethylene, and polypropylene.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a processing technology for a tensile and corrosion-resistant steel wire rope. Through process and composition limitations, a steel wire rope with high tensile strength, superhydrophobicity, wear resistance, and corrosion resistance is prepared, greatly extending the service life of the steel wire rope.

[0016] Select alloy steel as the raw material of the steel wire rope, and perform primary wire drawing, quenching, galvanizing treatment, and secondary wire drawing on the alloy steel in sequence to obtain pretreated steel wires. To further improve the wear resistance and corrosion resistance of the pretreated steel wires and expand the environmental application range of the steel wire rope, prepare a protective liquid with composite silica, modified polyurethane, trimethylolpropane tris(3-mercaptopropionate), photoinitiator, and solvent. Immerse the pretreated steel wires and the rope core in the protective liquid, and then perform photocuring to obtain treated steel wires with a superhydrophobic, wear-resistant, and corrosion-resistant surface. When stranding the wire ropes, combine 2-4 treated steel wires as the inner layer steel wires, and then combine 3-6 treated steel wires as the outer layer steel wires. Optimize the ratio of the inner and outer layer steel wire strands to improve the tensile strength of the steel wire rope, so that its breaking tensile force reaches more than 180 kN.

[0017] Nano-silica was introduced into the protective liquid as a filler to improve the corrosion resistance and wear resistance of the protective liquid. Hydroxylated multi-walled carbon nanotubes were used as the reinforcing phase, and a nano-silica-carbon nanotube hybrid material was prepared by the sol-gel method. The introduction of vinyl silane increased the amount of carbon-carbon double bonds on the surface of the hybrid silica and improved its reactivity. To improve the uniformity of the dispersion of the hybrid silica in the protective liquid, a fluorinated azide copolymer was grafted using the carbon-carbon double bond-like structure of the multi-walled carbon nanotubes in the hybrid silica. The fluorinated azide copolymer was prepared by visible-light-promoted atom transfer radical polymerization of an azide-group-containing monomer and a fluorine-containing monomer with hydrophobicity and strong corrosion resistance, thus endowing it with the advantages of water resistance and corrosion resistance.

[0018] In the protective liquid, polycarbonate diol, polytetrahydrofuran ether diol, polyether diol, isophorone diisocyanate, 1,6-hexanediol, and 1,4-butynediol were used as raw materials to synthesize polyalkynyl polyurethane. Based on copper catalysis, a click reaction occurred with the fluorinated azide copolymer to obtain a hydrophobic and corrosion-resistant polyurethane as the protective liquid base material. Then, under the action of a photoinitiator, trimethylolpropane tris(3-mercaptopropionate) was used as a crosslinking agent, and by controlling the ratio, a complex crosslinking network was constructed with the filler, enabling it to firmly adhere to the surface of the steel wire and improving the service life of the steel wire rope.

[0019] The inner-layer steel wires were twisted in the same direction around the treated rope core, and the outer-layer steel wires were twisted alternately around the inner-layer steel wires, thereby improving the tensile strength, flexibility, and wear resistance of the steel wire rope. Detailed implementation manners

[0020] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0021] It should be noted that if there are directional indications such as up, down, left, right, front, and back in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The technical solution of the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only used to explain the present invention and are not used to limit the present invention.

[0023] Example 1: A processing technology for a tensile and corrosion-resistant steel wire rope, comprising the following steps: S1: Take alloy steel as the raw material, perform primary wire drawing treatment, quenching, surface zinc plating treatment of 40 nm, and secondary wire drawing treatment to obtain a pretreated wire with a diameter of 2.5 mm; The working conditions of the quenching treatment are: temperature is 580 °C, and time is 3 h; S2: Prepare a protective liquid with composite silica, modified polyurethane, trimethylolpropane tris(3-mercaptopropionate), photoinitiator, and solvent; By mass, the composition of the protective liquid is: 1 part of composite silica, 6 parts of modified polyurethane, 1 part of trimethylolpropane tris(3-mercaptopropionate), 0.5 part of photoinitiator, and 17 parts of solvent; The solvent is ethyl acetate; The preparation of the composite silica includes the following steps: (1) Mix 0.1 g of hydroxylated multi-walled carbon nanotubes, 30 mL of ethanol, 10 mL of deionized water, add 3 mL of concentrated ammonia water, ultrasonically disperse for 50 min, add a mixture of 0.4 g of tetraethyl orthosilicate and 4 mL of ethanol, stir at 18 °C for 18 h, add 0.2 mL of ethanol, 0.2 mL of acetic acid, and 0.04 g of vinyltriethoxysilane, continue to stir for 5 h, centrifuge, wash, and dry to obtain hybrid silica; (2) In a nitrogen environment, mix 2.4 g of fluorinated azide copolymer, 7.2 g of hybrid silica, and 40 mL of N-methylpyrrolidone, keep it in an oil bath at 128 °C for 96 h, cool, filter by suction, wash, and dry to obtain composite silica; The preparation of the modified polyurethane includes the following steps: 1) Under nitrogen protection, mix 7.2 g of polycarbonate diol, 2 g of polytetrahydrofuran ether diol, 2.6 g of polyether diol, and 18.9 g of isophorone diisocyanate, heat up to 88 °C and keep it warm for 2 h, cool down to 43 °C, add 1.1 g of 1,6-hexanediol, 0.8 g of trimethylolpropane, 3.2 g of 1,4-butynediol, 36 mL of ethyl acetate, and 1.2 g of dibutyltin dilaurate, continue to keep it warm for 6 h to obtain alkynylated polyurethane; 2) Under a nitrogen atmosphere, mix 5 g of alkynylated polyurethane, 1 g of fluorinated azide copolymer, and 20 mL of N,N-dimethylformamide, ultrasonically disperse for 20 min, add 5 mg of copper sulfate pentahydrate and 5 mg of sodium ascorbate, and stir for 6 h to obtain modified polyurethane; The preparation of the fluorinated azide copolymer includes the following steps: A. Mix 9 mmol of 4-aminophenol, 10 mL of deionized water, and 2 mL of concentrated hydrochloric acid, stir at 0 °C for 4 min, add a mixture of 0.01 mol of sodium nitrite and 2 mL of deionized water, continue stirring for 15 min, add a mixture of 0.01 mol of sodium azide and 6 mL of deionized water, continue stirring for 80 min, raise the temperature to 18 °C and keep warm for 12 h, extract with 6 mL of dichloromethane, dry, add 8 mmol of triethylamine, add 8 mmol of methacryloyl chloride at 0 °C, raise the temperature to 18 °C and keep warm for 12 h, extract with 10 mL of deionized water, rotary evaporate, and perform column chromatography separation with petroleum ether and ethyl acetate in a volume ratio of 10:1 to obtain 4-azidophenyl methacrylate; B. Under vacuum conditions, mix 5 mmol of 4-azidophenyl methacrylate and 35 mg of eosin Y, add 0.05 mmol of triethylamine, 0.05 mmol of α-bromopropyl acetate, 20 mmol of perfluorooctyl methacrylate, and 10 mL of tetrahydrofuran, stir under irradiation with a 5 W blue LED lamp for 11 h, pour into methanol, filter by suction, and dry to obtain a fluorinated azide copolymer; S3: Immerse the pretreated steel wire and rope core in the protective liquid, take them out and perform photocuring treatment to obtain the treated steel wire and the treated rope core; The working conditions for the photocuring treatment are: irradiate with light of wavelength 365 nm for 3 min; S4: Twist 2 treated steel wires in a Z shape to obtain the inner layer steel wire; twist 3 treated steel wires in a Z shape to obtain the outer layer steel wire; S5: Twist 3 inner layer steel wires around the treated rope core in the same direction, twist 6 outer layer steel wires around the inner layer steel wire alternately, form and bend to obtain a tensile and corrosion-resistant steel wire rope.

[0024] Example 2: A processing technology for a tensile and corrosion-resistant steel wire rope, comprising the following steps: S1: Take alloy steel as the raw material, perform primary wire drawing treatment, quenching, surface zinc plating treatment of 40 nm, and secondary wire drawing treatment to obtain a pretreated steel wire with a diameter of 2.5 mm; The working conditions for the quenching treatment are: temperature is 590 °C, time is 2.5 h; S2: Prepare a protective liquid with composite silica, modified polyurethane, trimethylolpropane tris(3-mercaptopropionate), photoinitiator, and solvent; By mass, the composition of the protective liquid is: 3 parts of composite silica, 8 parts of modified polyurethane, 2 parts of trimethylolpropane tris(3-mercaptopropionate), 0.7 part of photoinitiator, and 20 parts of solvent; The solvent is ethyl acetate; The preparation of the composite silica includes the following steps: (1) Mix 0.1 g of hydroxylated multi-walled carbon nanotubes, 30 mL of ethanol, and 10 mL of deionized water. Add 3 mL of concentrated ammonia water, and ultrasonically disperse for 55 min. Then add a mixture of 0.4 g of tetraethyl orthosilicate and 4 mL of ethanol, stir at 20 °C for 17.5 h, add 0.2 mL of ethanol, 0.2 mL of acetic acid, and 0.04 g of vinyltriethoxysilane, and continue stirring for 5 - 6 h. Centrifuge, wash, and dry to obtain hybrid silica; (2) In a nitrogen environment, mix 2.4 g of fluorinated azide copolymer, 7.2 g of hybrid silica, and 40 mL of N-methylpyrrolidone, keep it in an oil bath at 130 °C for 94 h, cool, filter by suction, wash, and dry to obtain composite silica; The preparation of the modified polyurethane includes the following steps: 1) Under nitrogen protection, mix 7.2 g of polycarbonate diol, 2 g of polytetrahydrofuran ether diol, 2.6 g of polyether diol, and 18.9 g of isophorone diisocyanate, heat up to 90 °C and keep it warm for 1.5 h, then cool down to 45 °C, add 1.1 g of 1,6-hexanediol, 0.8 g of trimethylolpropane, 3.2 g of 1,4-butynediol, 36 mL of ethyl acetate, and 1.2 g of dibutyltin dilaurate, and continue to keep it warm for 7 h to obtain alkynylated polyurethane; 2) Under a nitrogen atmosphere, mix 5 g of alkynylated polyurethane, 1 g of fluorinated azide copolymer, and 20 mL of N,N-dimethylformamide, ultrasonically disperse for 25 min, add 5 mg of copper sulfate pentahydrate and 5 mg of sodium ascorbate, and stir for 6 - 8 h to obtain modified polyurethane; The preparation of the fluorinated azide copolymer includes the following steps: A. Mix 9 mmol of 4-aminophenol, 10 mL of deionized water, and 2 mL of concentrated hydrochloric acid, stir at 0 °C for 5 min, add a mixture of 0.01 mol of sodium nitrite and 2 mL of deionized water, continue stirring for 18 min, add a mixture of 0.01 mol of sodium azide and 6 mL of deionized water, continue stirring for 90 min, heat up to 20 °C and keep it warm for 11.5 h, extract with 6 mL of dichloromethane, dry, add 8 mmol of triethylamine, add 8 mmol of methacryloyl chloride at 0 °C, heat up to 20 °C and keep it warm for 11.5 h, extract with 10 mL of deionized water, rotary evaporate, and perform column chromatography separation with petroleum ether and ethyl acetate in a volume ratio of 10:1 to obtain 4-azidophenyl methacrylate; B. Under vacuum, mix 5 mmol of 4-azidophenyl methacrylate and 35 mg of eosin Y, add 0.05 mmol of triethylamine, 0.05 mmol of α-bromopropyl acetate, 20 mmol of perfluorooctyl methacrylate, and 10 mL of tetrahydrofuran, stir under irradiation of a 5 W blue LED lamp for 11.5 h, pour it into methanol, filter by suction, and dry to obtain the fluorinated azide copolymer; S3: Immerse the pretreated steel wire and the rope core in the protective liquid, take them out and perform photocuring treatment to obtain the treated steel wire and the treated rope core; The working conditions for the photocuring treatment are: irradiate with light of wavelength 365 nm for 3 min; S4: Twist 2 treated steel wires in a Z shape to obtain the inner-layer steel wire; twist 3 treated steel wires in a Z shape to obtain the outer-layer steel wire; S5: Twist 3 inner-layer steel wires around the treated rope core in the same direction, twist 6 outer-layer steel wires around the inner-layer steel wire in an alternating manner, form and bend to obtain a tensile and corrosion-resistant steel wire rope.

[0025] Example 3: A processing technology for a tensile and corrosion-resistant steel wire rope, including the following steps: S1: Take alloy steel as the raw material, perform primary wire drawing treatment, quenching and surface zinc plating treatment of 40 nm, and secondary wire drawing treatment to obtain a pretreated steel wire with a diameter of 2.5 mm; The working conditions for the quenching treatment are: temperature of 600 °C and time of 2 h; S2: Prepare the protective liquid with composite silica, modified polyurethane, trimethylolpropane tris(3-mercaptopropionate), photoinitiator, and solvent; By mass, the composition of the protective liquid is: 5 parts of composite silica, 11 parts of modified polyurethane, 3 parts of trimethylolpropane tris(3-mercaptopropionate), 1 part of photoinitiator, and 27 parts of solvent; The solvent is ethyl acetate; The preparation of the composite silica includes the following steps: (1) Mix 0.1 g of hydroxylated multi-walled carbon nanotubes, 30 mL of ethanol, 10 mL of deionized water, add 3 mL of concentrated ammonia water, ultrasonically disperse for 60 min, add a mixture of 0.4 g of tetraethyl orthosilicate and 4 mL of ethanol, stir at 25 °C for 17 h, add 0.2 mL of ethanol, 0.2 mL of acetic acid, and 0.04 g of vinyltriethoxysilane, continue to stir for 6 h, centrifuge, wash, and dry to obtain hybrid silica; (2) In a nitrogen environment, mix 2.4 g of fluorinated azide copolymer, 7.2 g of hybrid silica, and 40 mL of N-methylpyrrolidone, keep warm in an oil bath at 132 °C for 92 h, cool, filter by suction, wash, and dry to obtain composite silica.

[0026] The preparation of the modified polyurethane includes the following steps: 1) Under nitrogen protection, 7.2 g of polycarbonate diol, 2 g of polytetrahydrofuran ether diol, 2.6 g of polyether diol, and 18.9 g of isophorone diisocyanate were mixed, heated to 92 °C and kept warm for 1 h, then cooled to 47 °C, and 1.1 g of 1,6 - hexanediol, 0.8 g of trimethylolpropane, 3.2 g of 1,4 - butynediol, 36 mL of ethyl acetate, and 1.2 g of dibutyltin dilaurate were added, and the mixture was kept warm for another 8 h to obtain alkynylated polyurethane; 2) Under a nitrogen atmosphere, 5 g of alkynylated polyurethane, 1 g of fluorinated azide copolymer, and 20 mL of N,N - dimethylformamide were mixed, ultrasonically dispersed for 30 min, 5 mg of copper sulfate pentahydrate and 5 mg of sodium ascorbate were added, and the mixture was stirred for 8 h to obtain modified polyurethane; The preparation of the fluorinated azide copolymer includes the following steps: A. 9 mmol of 4 - aminophenol, 10 mL of deionized water, and 2 mL of concentrated hydrochloric acid were mixed, stirred at 0 °C for 6 min, a mixture of 0.01 mol of sodium nitrite and 2 mL of deionized water was added, and stirring was continued for 20 min. Then a mixture of 0.01 mol of sodium azide and 6 mL of deionized water was added, and stirring was continued for 100 min. The temperature was raised to 25 °C and kept warm for 11 h, extracted with 6 mL of dichloromethane, dried, 8 mmol of triethylamine was added, 8 mmol of methacryloyl chloride was added at 0 °C, the temperature was raised to 25 °C and kept warm for 11 h, extracted with 10 mL of deionized water, rotary evaporated, and column chromatographed with petroleum ether and ethyl acetate in a volume ratio of 10:1 to obtain 4 - azidophenyl methacrylate; B. Under vacuum, 5 mmol of 4 - azidophenyl methacrylate and 35 mg of eosin Y were mixed, 0.05 mmol of triethylamine, 0.05 mmol of α - bromopropyl acetate, 20 mmol of perfluorooctyl methacrylate, and 10 mL of tetrahydrofuran were added, and the mixture was stirred under irradiation with a 5 W blue LED lamp for 12 h, poured into methanol, filtered by suction, and dried to obtain the fluorinated azide copolymer; S3: The pretreated steel wire and rope core were impregnated in the protective liquid, taken out and subjected to photocuring treatment to obtain the treated steel wire and the treated rope core; The working conditions for photocuring treatment were: irradiated with light of wavelength 365 nm for 3 min; S4: Two treated steel wires were Z - shaped stranded to obtain the inner - layer steel wire; three treated steel wires were Z - shaped stranded to obtain the outer - layer steel wire; S5: Three inner - layer steel wires were twisted in the same direction around the treated rope core, and six outer - layer steel wires were twisted alternately around the inner - layer steel wire, formed and bent to obtain a tensile - resistant and corrosion - resistant steel wire rope.

[0027] Comparative Example 1: Taking Example 3 as the control group, silica (S433668: Aladdin reagent) was used to replace the composite silica, and other processes were normal.

[0028] Comparative Example 2: Taking Example 3 as the control group, polyurethane (BZ-7: Changzhou Baichang Coating Technology Co., Ltd.) was used to replace the composite polyurethane, and other processes were normal.

[0029] Comparative Example 3: Taking Example 3 as the control group, the fluorinated azide copolymer was not prepared, and other processes were normal.

[0030] The rope core is sisal (diameter 6 mm); the thickness of the protective liquid formed after curing on the surface of the pretreated steel wire and the rope core is 20 µm.

[0031] Sources of raw materials used (only as demonstration examples): Alloy steel uses 37CrNi3MoV, and its tensile strength is 1283 MPa; ethyl α-bromopropionate (EBPA): Sigma-Aldrich Chemical Technology (Shanghai) Co., Ltd.; polyether diol 032563: Hubei Shiteng Chemical Technology Co., Ltd.; polycarbonate diol DH2732: Hubei Dahao Chemical Co., Ltd.; trimethylolpropane tris(3-mercaptopropionate) T464015, photoinitiator (2-hydroxy-2-methylpropiophenone) H110280, hydroxylated multi-walled carbon nanotubes C139830, tetraethyl orthosilicate T110593, vinyltriethoxysilane T103647, N-methylpyrrolidone M100588, polytetrahydrofuran ether diol P118599, isophorone diisocyanate I109582, dibutyltin dilaurate D100274, 1,6-hexanediol H103708, trimethylolpropane T110597, 1,4-butyne diol B103672, N,N-dimethylformamide D111999, 4-aminophenol A471985, triethylamine T103285, methacryloyl chloride M109517, eosin Y E113225, perfluorooctyl methacrylate I170099, tetrahydrofuran T103263: Aladdin reagents; ethyl acetate, ethanol, concentrated ammonia water, sodium nitrite, sodium azide, acetic acid, concentrated hydrochloric acid, copper sulfate pentahydrate, sodium ascorbate, dichloromethane, petroleum ether, methanol, analytical pure: reagents from Sinopharm Chemical Reagent Co., Ltd.

[0032] Performance test: The steel ropes prepared in the examples and comparative examples were tested: Hydrophobicity: Tested with 4 μL deionized water droplets, and the water contact angle was detected with a tester; corrosion resistance: The sample was irradiated with 365 nm light for 72 h, and then immersed in a 10% sodium chloride solution by mass for 168 h, and the surface corrosion morphology was observed. If there were no blisters, cracks, etc., it was considered qualified, otherwise it was unqualified; the results are shown in Table 1. Table 1

[0033] The present invention provides a processing technology for a tensile corrosion-resistant steel wire rope. Through process and composition limitations, a steel wire rope with high tensile strength, superhydrophobicity, wear resistance, and corrosion resistance is prepared, greatly extending the service life of the steel wire rope.

[0034] Comparing Example 3 with Comparative Example 1 and Comparative Example 3, it can be seen that nano-silica is introduced as a filler in the protective liquid to improve the corrosion resistance and wear resistance of the protective liquid. Using hydroxylated multi-walled carbon nanotubes as the reinforcing phase, a nano-silica-carbon nanotube hybrid material is prepared by the sol-gel method. The introduction of vinyl silane increases the amount of carbon-carbon double bonds on the surface of the hybrid silica and improves its reactivity. To improve the uniformity of the dispersion of the hybrid silica in the protective liquid, a fluorinated azide copolymer is grafted using the carbon-carbon double bond-like groups on the hybrid silica. The fluorinated azide copolymer is prepared by visible light-promoted atom transfer radical polymerization of an azide group-containing monomer and a fluorinated monomer with hydrophobicity and strong corrosion resistance, thereby endowing it with the advantages of water resistance and corrosion resistance.

[0035] Comparing Example 3 with Comparative Example 2 and Comparative Example 3, it can be seen that in the protective liquid, polycarbonate diol, polytetrahydrofuran ether diol, polyether diol, isophorone diisocyanate, 1,6-hexanediol, and 1,4-butynediol are used as raw materials to synthesize polyalkynyl polyurethane. Based on copper catalysis, a click reaction occurs with the fluorinated azide copolymer to obtain a hydrophobic and corrosion-resistant polyurethane as the base material of the protective liquid. Then, under the action of a photoinitiator, using trimethylolpropane tris(3-mercaptopropionate) as a crosslinking agent, by controlling the ratio, a complex crosslinked network is constructed with the filler, making it firmly adhere to the surface of the steel wire and improving the service life of the steel wire rope.

[0036] The above are only the embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structural transformation made using the description of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A processing technology for a tensile and corrosion-resistant steel wire rope, characterized in that, It includes the following steps: S1: Take alloy steel as raw material, conduct primary wire drawing treatment, quenching, surface galvanizing treatment, and secondary wire drawing treatment to obtain pretreated steel wire; S2: Prepare a protective liquid with composite silica, modified polyurethane, trimethylolpropane tris(3-mercaptopropionate), photoinitiator, and solvent; S3: Immerse the pretreated steel wire and rope core in the protective liquid, take them out and conduct photocuring treatment to obtain treated steel wire and treated rope core; S4: Conduct Z-shaped stranding on 2-4 treated steel wires to obtain inner-layer steel wires; conduct Z-shaped stranding on 3-6 treated steel wires to obtain outer-layer steel wires; S5: Twist the inner-layer steel wires around the treated rope core in the same direction, twist the outer-layer steel wires around the inner-layer steel wires in an alternating manner, form and bend to obtain a tensile and corrosion-resistant steel wire rope.

2. The processing technology of a tensile and corrosion-resistant steel wire rope according to claim 1, characterized in that, The working conditions of the quenching treatment are: the temperature is 580-600°C.

3. The processing technology of a tensile and corrosion-resistant steel wire rope according to claim 1, characterized in that The thickness of the galvanized layer formed after surface galvanizing treatment is 30-50 nm.

4. The processing technology of a tensile and corrosion-resistant steel wire rope according to claim 1, characterized in that, By mass fraction, the composition of the protective liquid is: 1-5 parts of composite silica, 6-11 parts of modified polyurethane, 1-3 parts of trimethylolpropane tris(3-mercaptopropionate), 0.5-1 part of photoinitiator, and 17-27 parts of solvent.

5. The processing technology of a tensile and corrosion-resistant steel wire rope according to claim 1, characterized in that, The solvent is one or a combination of ethyl acetate, tetrahydrofuran, and dimethylformamide.

6. The processing technology of a tensile and corrosion-resistant steel wire rope according to claim 1, characterized in that, The working conditions of the photocuring treatment are: irradiate with light of wavelength 365 nm for 3 min.

7. The processing technology of a tensile and corrosion-resistant steel wire rope according to claim 1, characterized in that, The preparation of the composite silica includes the following steps: (1) Mix hydroxylated multi-walled carbon nanotubes, ethanol, deionized water, add concentrated ammonia water, ultrasonically disperse for 50-60 min, add a mixed solution of tetraethyl orthosilicate and ethanol, stir at 18-25°C for 17-18 h, add ethanol, acetic acid, vinyltriethoxysilane, continue to stir for 5-6 h, centrifuge, wash, and dry to obtain hybrid silica; (2) In a nitrogen environment, mix a fluorinated azide copolymer, hybrid silica, and N-methylpyrrolidone, keep it in an oil bath at 128-132°C for 92-96 h, cool, filter by suction, wash, and dry to obtain composite silica.

8. The processing technology of a tensile and corrosion-resistant steel wire rope according to claim 1, characterized in that, The preparation of the modified polyurethane includes the following steps: 1) Under nitrogen protection, mix polycarbonate diol, polytetrahydrofuran ether diol, polyether diol, and isophorone diisocyanate, heat up to 88-92°C and keep it warm for 1-2 h, cool down to 43-47°C, add 1,6-hexanediol, trimethylolpropane, 1,4-butynediol, ethyl acetate, and dibutyltin dilaurate, continue to keep it warm for 6-8 h to obtain alkynylated polyurethane; 2) In a nitrogen atmosphere, mix alkynylated polyurethane, fluorinated azide copolymer, and N,N-dimethylformamide, ultrasonically disperse for 20-30 min, add copper sulfate pentahydrate and sodium ascorbate, and stir for 6-8 h to obtain modified polyurethane.

9. The processing technology of a tensile and corrosion-resistant steel wire rope according to claim 7 or 8, characterized in that, The preparation of the fluorinated azide copolymer includes the following steps: A. Mix 4-aminophenol, deionized water, and concentrated hydrochloric acid, stir at 0 °C for 4 - 6 min, add a mixed solution of sodium nitrite and deionized water, continue stirring for 15 - 20 min, add a mixed solution of sodium azide and deionized water, continue stirring for 80 - 100 min, raise the temperature to 18 - 25 °C and keep warm for 11 - 12 h, extract with dichloromethane, dry, add triethylamine, add methacryloyl chloride at 0 °C, raise the temperature to 18 - 25 °C and keep warm for 11 - 12 h, extract with deionized water, rotary evaporate, and perform column chromatography separation with petroleum ether and ethyl acetate in a volume ratio of 10:1 to obtain 4-azidophenyl methacrylate; B. Under vacuum, mix 4-azidophenyl methacrylate and eosin Y, add triethylamine, ethyl α-bromopropylacetate, perfluorooctyl methacrylate, and tetrahydrofuran, stir under irradiation of a 5W blue LED lamp for 11 - 12 h, pour into methanol, filter by suction, and dry to obtain a fluorinated azide copolymer.

10. A tensile corrosion-resistant steel wire rope, characterized in that, Prepared by the process described in any one of claims 1 - 8.

Images