CN113265590A - High-strength antirust alloy spring steel wire and forming process thereof - Google Patents
High-strength antirust alloy spring steel wire and forming process thereof Download PDFInfo
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- CN113265590A CN113265590A CN202110635695.0A CN202110635695A CN113265590A CN 113265590 A CN113265590 A CN 113265590A CN 202110635695 A CN202110635695 A CN 202110635695A CN 113265590 A CN113265590 A CN 113265590A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
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- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/007—Heat treatment of ferrous alloys containing Co
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- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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- C—CHEMISTRY; METALLURGY
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- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/36—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/021—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by their composition, e.g. comprising materials providing for particular spring properties
Abstract
The invention provides a high-strength antirust alloy spring steel wire and a forming process thereof, belonging to the technical field of alloy spring steel wire production, wherein the high-strength antirust alloy spring steel wire is made of high-strength alloy steel materials, and the high-strength alloy steel materials comprise the following components in percentage by weight: 1.2 to 2 percent of silicon, 0.7 to 1.0 percent of chromium, 0.8 to 1.0 percent of cobalt, 0.5 to 1.0 percent of tungsten, 0.25 to 0.3 percent of nickel, 0.4 to 0.5 percent of molybdenum, 0.6 to 0.9 percent of manganese, 0.001 to 0.003 percent of boron, 0.56 to 0.64 percent of carbon, 0.1 to 0.2 percent of vanadium, 0.06 to 0.09 percent of titanium, 0.1 to 0.12 percent of niobium, and the balance of iron and inevitable impurities, wherein the content of phosphorus in the impurities is less than or equal to 0.03 percent; and an anti-rust layer is coated on the surface of the alloy spring steel wire. The high-strength antirust alloy spring steel wire is prepared by mixing a plurality of elements, has high strength, is provided with an antirust layer on the surface, is firmly combined with a base material, and can ensure that the alloy spring steel wire has better antirust and anticorrosion effects; the high-strength antirust alloy spring steel wire is simple in forming process, wide in source and suitable for industrial large-scale popularization.
Description
Technical Field
The invention belongs to the technical field of alloy spring steel wire production, and particularly relates to a high-strength antirust alloy spring steel wire and a forming process thereof.
Background
The alloy spring steel wire is used for manufacturing springs, and is characterized in that based on carbon steel, alloy elements are properly added to improve the mechanical property of the steel so as to meet the use requirement of the steel. The mechanical property of the steel wire directly determines the mechanical property of the spring, and the spring is used as an elastic part, needs to have higher strength and better anti-relaxation property; in addition, the spring is used in some exposed atmospheric environments, and the spring is required to have good antirust capacity, otherwise the actual service life of the spring is affected.
In the prior art, the strength of the steel is generally enhanced by adding silicon, and the silicon can be dissolved in ferrite and austenite, so that the hardness and the strength of the steel can be improved, the effect of the silicon is stronger than that of elements such as manganese, nickel, chromium, tungsten, molybdenum, vanadium and the like, but after the content of the silicon is continuously increased, the plasticity and the toughness of the steel are obviously reduced, and the processing quality of the alloy steel is poorer when the alloy steel is used for springs; for rust prevention of steel, nickel is generally added into the steel to enhance the corrosion resistance of the steel, but the nickel content added into the steel is very low, so the rust prevention effect is limited, or an anticorrosive coating is brushed on the surface of the steel to play an anticorrosive role, but the coating is easy to fall off under the action of wind blowing and sunshine, so the anticorrosive effect cannot be played.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the high-strength antirust alloy spring steel wire and the forming process thereof, the high-strength antirust alloy spring steel wire is prepared by mixing a plurality of elements, has high strength, is provided with an antirust layer on the surface, is firmly combined with a base material, and can ensure that the alloy spring steel wire has better antirust and anticorrosion effects; the high-strength antirust alloy spring steel wire is simple in forming process, wide in source and suitable for industrial large-scale popularization.
In order to achieve the purpose, the invention is realized by the following technical scheme: the high-strength antirust alloy spring steel wire is made of high-strength alloy steel materials, and the high-strength alloy steel materials comprise the following components in percentage by weight: 1.2 to 2 percent of silicon, 0.7 to 1.0 percent of chromium, 0.8 to 1.0 percent of cobalt, 0.5 to 1.0 percent of tungsten, 0.25 to 0.3 percent of nickel, 0.4 to 0.5 percent of molybdenum, 0.6 to 0.9 percent of manganese, 0.001 to 0.003 percent of boron, 0.56 to 0.64 percent of carbon, 0.1 to 0.2 percent of vanadium, 0.06 to 0.09 percent of titanium, 0.1 to 0.12 percent of niobium, and the balance of iron and inevitable impurities, wherein the content of phosphorus in the impurities is less than or equal to 0.03 percent;
the surface of the alloy spring steel wire is coated with an antirust layer, and the antirust layer comprises antirust liquid consisting of the following components in parts by weight: 20-30 parts of phosphoric acid, 1-5 parts of nitric acid, 1-5 parts of hydrochloric acid, 10-15 parts of sodium phytate, 5-10 parts of sodium benzoate, 5-10 parts of urotropine and 45-60 parts of deionized water;
the thickness of the anti-rust layer is 1-20 mu m.
Silicon can be dissolved in ferrite and austenite to improve the hardness and strength of steel, and a layer of silicon dioxide film can be formed on the surface of the steel when the steel is heated at high temperature to prevent the oxidation of the steel; chromium increases the hardenability of steel and has a secondary hardening effect, which can improve the hardness and wear resistance of carbon steel without making the steel brittle; the cobalt can strengthen ferrite, and can improve the hardness and tensile strength of steel; tungsten can form carbide with carbon to enhance wear resistance, and can also be partially dissolved in iron to form solid solution to enhance hardness; nickel can strengthen ferrite and refine pearlite, can improve the strength of steel without obviously reducing the toughness, and also has corrosion resistance; molybdenum can improve the hardenability and the heat strength of steel, prevent temper brittleness and improve plasticity; manganese can be deoxidized and desulfurized, improve hot workability, can form solid solution with iron, improve the hardness and strength of ferrite and austenite in steel, can form carbide with carbon, and refine pearlite; boron can increase the hardenability of steel, is low in price and can replace some precious metals; the carbon can obviously enhance the tensile strength and the hardness of the steel, and has wide sources and low price; vanadium has strong affinity with carbon and oxygen, forms carbide, can refine grains, and can improve strength and yield ratio; titanium has good affinity to nitrogen, oxygen, carbon and sulfur, and forms titanium carbide with carbon, so that the strength of the steel is improved; niobium is partially soluble in a solid solution, and hardenability of steel can be improved. The sodium phytate in the antirust liquid has strong chelating effect with metal ions, and can prevent the corrosion and the rusting of the surface of steel in turn.
Further, the antirust layer also contains a film forming agent, and the mass ratio of the film forming agent to the antirust liquid and the deionized water is as follows: 3-5:20:80.
Further, the film forming agent is fluorocarbon emulsion. The film-forming agent can enable the antirust liquid to form a film on the surface of steel, can further play a role in rust prevention, and the fluorocarbon emulsion has good weather resistance, stain resistance and no yellowing.
The invention also provides a forming process of the high-strength antirust alloy spring steel wire, and the preparation method of the high-strength antirust alloy spring steel wire comprises the following processing steps:
s1: smelting: putting the raw materials of the high-strength alloy steel into a smelting furnace according to the proportion for smelting, raising the smelting temperature to 1550-;
s2: refining: placing the smelted alloy liquid into a refining furnace for refining at the temperature of 1350-;
s3: rolling: rolling the cast ingot obtained in the step 2 into a steel wire with a required size;
s4: and (3) heat treatment: placing the steel wire in a heat treatment furnace for heat treatment at the temperature of 800-;
s5: preparing the antirust agent: uniformly mixing the components of the antirust liquid in a mass ratio, and continuously stirring for 0.5-1h at the temperature of 55-65 ℃ to obtain the antirust agent;
s6: coating an antirust layer: and (3) uniformly stirring and mixing the antirust agent, the deionized water and the film-forming agent according to the mass ratio, stirring for 1-1.5h at the mixing temperature of 65-85 ℃, then soaking the steel wire treated in the step (4) in the mixed solution at room temperature for 3-5min, and drying the surface of the steel wire.
Further, the steel wire in the step 6 is subjected to a surface degreasing cleaning operation before being coated with the rust preventive agent.
Further, the oil removing step is as follows: soaking the steel wire in sodium carbonate solution at 45-55 deg.C for 10-15min, soaking in sodium hydroxide solution at 45-55 deg.C for 10-15min, cleaning the surface with hot water to neutrality, and blow-drying the surface water.
Further, the mass concentration of the sodium carbonate solution is 10-15%, and the mass concentration of the sodium hydroxide solution is 10-15%.
Has the advantages that: compared with the prior art, the invention has the following advantages: the high-strength antirust alloy spring steel wire is prepared by mixing multiple elements, has high strength, and is provided with an antirust layer on the surface, so that the alloy spring steel wire is firmly combined with a base material, and has better antirust and anticorrosion effects; the high-strength antirust alloy spring steel wire is simple in forming process, wide in source and suitable for industrial large-scale popularization.
Detailed Description
The invention will now be further illustrated by reference to the following specific examples.
Example 1
The forming process of the high-strength antirust alloy spring steel wire comprises the following processing steps:
s1: smelting: 1.2% of silicon, 0.7% of chromium, 0.8% of cobalt, 0.5% of tungsten, 0.25% of nickel, 0.4% of molybdenum, 0.6% of manganese, 0.001% of boron, 0.56% of carbon, 0.1% of vanadium, 0.06% of titanium, 0.1% of niobium and 94.73% of iron, wherein the total amount is 100%, the silicon, the chromium, the vanadium and the titanium are put into a smelting furnace for smelting, the smelting temperature is increased to 1550 ℃ at the temperature rising speed of 400 ℃/30min, and the smelting is carried out for 30min at the temperature;
s2: refining: placing the smelted alloy liquid into a refining furnace for refining at 1350 ℃ for 30min, introducing nitrogen into the alloy liquid for protection in the refining process, and cooling the alloy liquid into an ingot after refining;
s3: rolling: rolling the cast ingot obtained in the step 2 into a steel wire with a required size;
s4: and (3) heat treatment: placing the steel wire in a heat treatment furnace for heat treatment at 800 ℃ for 1h, rapidly cooling to 350 ℃, preserving heat for 0.5h at the temperature, taking out, quenching by oil, and cooling to room temperature;
s5: preparing the antirust agent: uniformly mixing 20 parts of phosphoric acid, 1 part of nitric acid, 1 part of hydrochloric acid, 10 parts of sodium phytate, 5 parts of sodium benzoate, 5 parts of urotropine and 45 parts of deionized water, and continuously stirring for 0.5h at 55 ℃ to obtain an antirust agent;
s6: coating an antirust layer: uniformly stirring and mixing 20 parts of antirust agent, 80 parts of deionized water and 3 parts of film forming agent, wherein the film forming agent is fluorocarbon emulsion, the mixing temperature is 65 ℃, and stirring is carried out for 1 hour to obtain antirust mixed liquid; and then, carrying out oil removal cleaning operation on the surface of the steel wire treated in the step 4, specifically: soaking the steel wire in a sodium carbonate solution with the mass concentration of 10% for 10min at the soaking temperature of 45 ℃, then soaking the steel wire in a sodium hydroxide solution with the mass concentration of 10% for 10min at the soaking temperature of 45 ℃, cleaning the surface to be neutral by hot water, drying the surface moisture, then soaking the cleaned steel wire in the antirust mixed solution at room temperature for 3min, and drying the surface of the steel wire, wherein the antirust layer is 1 micron thick.
Example 2
The forming process of the high-strength antirust alloy spring steel wire comprises the following processing steps:
s1: smelting: putting 2% of silicon, 1.0% of chromium, 1.0% of cobalt, 1.0% of tungsten, 0.3% of nickel, 0.5% of molybdenum, 0.9% of manganese, 0.003% of boron, 0.64% of carbon, 0.2% of vanadium, 0.09% of titanium, 0.12% of niobium and 92.247% of iron, wherein the total amount is 100% into a smelting furnace for smelting, the smelting temperature is increased to 1650 ℃ at the temperature rising speed of 400 ℃/30min, and smelting is carried out for 60min at the temperature;
s2: refining: placing the smelted alloy liquid into a refining furnace for refining at 1400 ℃ for 45min, introducing nitrogen into the alloy liquid for protection in the refining process, and cooling the alloy liquid into ingots after refining;
s3: rolling: rolling the cast ingot obtained in the step 2 into a steel wire with a required size;
s4: and (3) heat treatment: placing the steel wire in a heat treatment furnace for heat treatment at 850 ℃ for 2h, rapidly cooling to 450 ℃, preserving heat for 1.5h at the temperature, taking out, quenching by oil, and cooling to room temperature;
s5: preparing the antirust agent: uniformly mixing 30 parts of phosphoric acid, 5 parts of nitric acid, 5 parts of hydrochloric acid, 15 parts of sodium phytate, 10 parts of sodium benzoate, 10 parts of urotropine and 60 parts of deionized water, and continuously stirring for 1h at 65 ℃ to obtain an antirust agent;
s6: coating an antirust layer: uniformly stirring and mixing 20 parts of antirust agent, 80 parts of deionized water and 5 parts of film forming agent, wherein the film forming agent is fluorocarbon emulsion, the mixing temperature is 85 ℃, and stirring is carried out for 1.5 hours; and then, carrying out oil removal cleaning operation on the surface of the steel wire treated in the step 4, specifically: soaking the steel wire in 15% sodium carbonate solution at 55 ℃ for 15min, then soaking the steel wire in 15% sodium hydroxide solution at 55 ℃ for 15min, then cleaning the surface with hot water to neutrality, drying the surface water, then soaking the cleaned steel wire in the antirust mixed solution at room temperature for 5min, and then drying the surface of the steel wire, wherein the thickness of the antirust layer is 20 microns.
Example 3
The forming process of the high-strength antirust alloy spring steel wire comprises the following processing steps:
s1: smelting: putting 1.6% of silicon, 0.85% of chromium, 0.9% of cobalt, 0.75% of tungsten, 0.27% of nickel, 0.45% of molybdenum, 0.75% of manganese, 0.002% of boron, 0.6% of carbon, 0.15% of vanadium, 0.075% of titanium, 0.11% of niobium and 93.493% of iron, wherein the total amount is 100% into a smelting furnace for smelting, wherein the smelting temperature is increased to 1600 ℃ at the temperature rising speed of 400 ℃/30min, and smelting is carried out for 45min at the temperature;
s2: refining: placing the smelted alloy liquid into a refining furnace for refining at 1370 ℃ for 37min, introducing nitrogen into the alloy liquid for protection in the refining process, and cooling the alloy liquid into an ingot after refining;
s3: rolling: rolling the cast ingot obtained in the step 2 into a steel wire with a required size;
s4: and (3) heat treatment: placing the steel wire in a heat treatment furnace for heat treatment at 825 deg.C for 1.5h, rapidly cooling to 400 deg.C, maintaining at the temperature for 1h, taking out, quenching with oil, and cooling to room temperature;
s5: preparing the antirust agent: uniformly mixing 25 parts of phosphoric acid, 3 parts of nitric acid, 3 parts of hydrochloric acid, 12 parts of sodium phytate, 7 parts of sodium benzoate, 7 parts of urotropine and 52 parts of deionized water, and continuously stirring for 0.7h at 60 ℃ to obtain an antirust agent;
s6: coating an antirust layer: uniformly stirring and mixing 20 parts of antirust agent, 80 parts of deionized water and 4 parts of film forming agent, wherein the film forming agent is fluorocarbon emulsion, the mixing temperature is 75 ℃, and stirring is carried out for 1.2 hours; and then, carrying out oil removal cleaning operation on the surface of the steel wire treated in the step 4, specifically: soaking the steel wire in a sodium carbonate solution with the mass concentration of 12% for 13min at the soaking temperature of 50 ℃, then soaking the steel wire in a sodium hydroxide solution with the mass concentration of 12% for 13min at the soaking temperature of 50 ℃, cleaning the surface to be neutral by hot water, drying the surface moisture, then soaking the cleaned steel wire in the antirust mixed solution at room temperature, soaking for 4min, and drying the surface of the steel wire, wherein the antirust layer is 10 microns thick.
Comparative example 1
The comparative example is that of example 3, wherein the forming process adopted by the alloy spring steel wire is the same as the formulation and the steps of the alloy spring steel wire of example 3, but the surface of the steel wire has no antirust agent, and the steps 5 and 6 are not included.
Comparative example 2
The comparative example is the comparative example of example 3, wherein the steel wire used in the comparative example is commercially available alloy steel, and the specific mixture ratio is as follows: 0.59% of carbon, 1.63% of silicon, 0.74% of manganese, 0.005% of sulfur, 0.005% of phosphorus and the balance of iron, and on the surface thereof, a rust preventive layer having the same thickness was applied as in step 5 and step 6 in example 3.
Comparative example 3
This comparative example is a blank comparative example, and this comparative example is the commercial alloy steel wire in comparative example 2, and the surface does not contain a rust preventive layer.
Performance testing
In order to verify the metal strength and corrosion resistance of the alloy spring steel wire of the present invention, the steel wires manufactured in examples 1 to 3 and comparative examples 1 to 3 were subjected to the following tests to evaluate the metal hardness and rust inhibitive ability thereof, and the test results are shown in tables 1 and 2 below; the mechanical property test is detected according to GB/T24182-2009, and the antirust test method comprises the steps of placing a sample of a 125 x 10 x 200mm sample in a sodium chloride solution with the mass concentration of 5%, wherein the test temperature is 40-50 ℃, the humidity is 65-75%, and measuring the surface corrosion rate;
TABLE 1 mechanical Property test results
| Tensile strength/MPa | Yield strength/Mpa | End surface is receivedReduction/% of | |
| Example 1 | 1200 | 730 | 31 |
| Example 2 | 1900 | 965 | 38 |
| Example 3 | 1450 | 866 | 35 |
| Comparative example 1 | 1415 | 832 | 32 |
| Comparative example 2 | 732 | 482 | 21 |
| Comparative example 3 | 728 | 469 | 20 |
Table 2 corrosion resistance test results
From the results, the alloy metal adopted by the high-strength antirust alloy spring steel wire has higher hardness, better toughness, easy processing and certain antirust capacity, and the steel wire can have better corrosion resistance after the antirust agent is coated on the surface.
The foregoing is directed to embodiments of the present invention and, more particularly, to a method and apparatus for controlling a power converter in a power converter, including a power converter, a display and a display panel.
Claims (7)
1. The utility model provides a rust-resistant alloy spring steel wire of high strength which characterized in that: the high-strength antirust alloy spring steel wire is made of high-strength alloy steel materials, and the high-strength alloy steel materials comprise the following components in percentage by weight: 1.2 to 2 percent of silicon, 0.7 to 1.0 percent of chromium, 0.8 to 1.0 percent of cobalt, 0.5 to 1.0 percent of tungsten, 0.25 to 0.3 percent of nickel, 0.4 to 0.5 percent of molybdenum, 0.6 to 0.9 percent of manganese, 0.001 to 0.003 percent of boron, 0.56 to 0.64 percent of carbon, 0.1 to 0.2 percent of vanadium, 0.06 to 0.09 percent of titanium, 0.1 to 0.12 percent of niobium, and the balance of iron and inevitable impurities, wherein the content of phosphorus in the impurities is less than or equal to 0.03 percent;
the surface of the alloy spring steel wire is coated with an antirust layer, and the antirust layer comprises antirust liquid consisting of the following components in parts by weight: 20-30 parts of phosphoric acid, 1-5 parts of nitric acid, 1-5 parts of hydrochloric acid, 10-15 parts of sodium phytate, 5-10 parts of sodium benzoate, 5-10 parts of urotropine and 45-60 parts of deionized water;
the thickness of the anti-rust layer is 1-20 mu m.
2. The high-strength rust-preventive alloy spring steel wire according to claim 1, characterized in that: the antirust layer also contains a film forming agent, and the film forming agent, the antirust liquid and the deionized water are in the following mass ratio: 3-5:20:80.
3. The high-strength rust-preventive alloy spring steel wire according to claim 2, characterized in that: the film forming agent is fluorocarbon emulsion.
4. A molding process of a high-strength rust-proof alloy spring steel wire, which prepares a high-strength rust-proof alloy spring steel wire according to claim 2 or 3, characterized in that: the method comprises the following processing steps:
s1: smelting: putting the raw materials of the high-strength alloy steel into a smelting furnace according to the proportion for smelting, raising the smelting temperature to 1550-;
s2: refining: placing the smelted alloy liquid into a refining furnace for refining at the temperature of 1350-;
s3: rolling: rolling the cast ingot obtained in the step 2 into a steel wire with a required size;
s4: and (3) heat treatment: placing the steel wire in a heat treatment furnace for heat treatment at the temperature of 800-;
s5: preparing the antirust agent: uniformly mixing the components of the antirust liquid in a mass ratio, and continuously stirring for 0.5-1h at the temperature of 55-65 ℃ to obtain the antirust agent;
s6: coating an antirust layer: and (3) uniformly stirring and mixing the antirust agent, the deionized water and the film-forming agent according to the mass ratio, stirring for 1-1.5h at the mixing temperature of 65-85 ℃, then soaking the steel wire treated in the step (4) in the mixed solution at room temperature for 3-5min, and drying the surface of the steel wire.
5. The forming process of the high-strength antirust alloy spring steel wire according to claim 4, characterized in that: and (3) carrying out surface degreasing and cleaning operation on the steel wire in the step 6 before coating the antirust agent.
6. The forming process of the high-strength antirust alloy spring steel wire according to claim 5, characterized in that: the oil removing step comprises the following steps: soaking the steel wire in sodium carbonate solution at 45-55 deg.C for 10-15min, soaking in sodium hydroxide solution at 45-55 deg.C for 10-15min, cleaning the surface with hot water to neutrality, and blow-drying the surface water.
7. The forming process of the high-strength antirust alloy spring steel wire according to claim 6, characterized in that: the mass concentration of the sodium carbonate solution is 10-15%, and the mass concentration of the sodium hydroxide solution is 10-15%.
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| CN105385939A (en) * | 2015-12-15 | 2016-03-09 | 安徽楚江特钢有限公司 | Manufacturing method of high-strength high-tenacity alloy steel |
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| CN106048424A (en) * | 2016-08-17 | 2016-10-26 | 安徽红桥金属制造有限公司 | High-strength anti-corrosion spring steel and process technology thereof |
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| CN101287850A (en) * | 2006-11-09 | 2008-10-15 | 新日本制铁株式会社 | Steel for high intensity spring and heat-treating steel line for high intensity spring |
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| CN105385939A (en) * | 2015-12-15 | 2016-03-09 | 安徽楚江特钢有限公司 | Manufacturing method of high-strength high-tenacity alloy steel |
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