CN113913683A - High-strength nut material and preparation method thereof - Google Patents
High-strength nut material and preparation method thereof Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/14—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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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
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- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C21D6/002—Heat treatment of ferrous alloys containing Cr
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- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
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Abstract
The invention provides a high-strength nut material and a preparation method thereof, and the high-strength nut material comprises a steel substrate and a wear-resistant and corrosion-resistant coating coated on the surface of the steel substrate, wherein the steel substrate comprises the following chemical components in percentage by weight: 0.05 to 0.1 percent of carbon, 0.3 to 0.5 percent of germanium, 0.3 to 0.5 percent of silicon, 3 to 5 percent of copper, 0.1 to 0.2 percent of hafnium, 2 to 3 percent of tungsten, 0.5 to 0.8 percent of niobium, 0.8 to 1.3 percent of manganese, 3 to 6 percent of chromium, 0.001 to 0.003 percent of palladium, less than or equal to 0.001 percent of arsenic, less than or equal to 0.01 percent of sulfur and the balance of iron; the wear-resistant and corrosion-resistant coating is prepared from the following components in parts by weight: 50-60 parts of epoxy group-containing polysiloxane borane hyperbranched polymer, 4-6 parts of nano diamond powder, 3-5 parts of nano boron fiber, 4-6 parts of 3, 5-diamino-1, 2, 4-triazole, 2-4 parts of 2,2' -bis (trifluoromethyl) diaminobiphenyl and 1-3 parts of coupling agent. The high-strength nut material disclosed by the invention has the advantages of high mechanical strength, good corrosion resistance, wear resistance and hardness, high preparation efficiency, good high and low temperature resistance and anti-loosening performance and long service life.
Description
Technical Field
The invention relates to the technical field of manufacturing of mechanical parts, in particular to a high-strength nut material and a preparation method thereof.
Background
With the development of economy and the joy of the equipment manufacturing industry in China, the speed of upgrading the industry and the promotion of the sustainable development strategy, people have higher and higher requirements on the product quality and the technical level of the nut. The nut is a common fastener in various industries, is used in combination with the bolt, can be used for installing and fixing various mechanical parts, ensures the integrity and stability of equipment, and is one of indispensable industrial necessities in modern industrial production and daily life.
The traditional nut preparation process mostly uses copper alloy with high copper content for processing, has low material hardness and poor wear resistance, and cannot meet the requirements of high-speed development industry and building industry. Most of the metal materials are formed by cold heading with a die at least twice in the preparation process, the first cold heading and the second cold heading are easy to form, but after the metal materials are subjected to multiple cold heading, the plasticity of the metal is changed due to cold hardening, and the subsequent cold heading forming treatment is influenced. In addition, the nut materials on the market have the defects of more or less incapability of meeting the requirements of high temperature and severe cold, insufficient corrosion resistance and loosening resistance and the like.
In order to solve the above problems, chinese patent CN104264076B discloses a wear-resistant nut and a manufacturing method thereof. The manufacturing method of the wear-resistant nut comprises a manufacturing step of alloy materials and a casting molding step of the nut. The wear-resistant nut made of the alloy steel material replaces a copper alloy material in the prior art, has high hardness and high wear resistance, and meets the high standard requirements of the industry and the construction industry; by adopting the graded quenching process, the phase transformation stress of the wear-resistant nut material structure in the process of transformation from austenite to martensite is effectively reduced, and the generation of cracks in the transformation process is effectively reduced. Compared with similar products made of copper alloy materials in the prior art, the hardness of the wear-resistant nut manufactured by the method is improved by 39-45%, the wear resistance is improved by 18-22%, and the crack rate is reduced by 13-20%. However, the mechanical strength and corrosion resistance thereof are to be further improved.
Therefore, it is one of the problems to be solved by researchers in the industry at present how to provide a high-strength nut material with high mechanical strength, good corrosion resistance, wear resistance and hardness, high preparation efficiency, high and low temperature resistance and good anti-loosening performance, and a preparation method thereof.
Disclosure of Invention
The invention mainly aims to provide a high-strength nut material which has high mechanical strength, good corrosion resistance, wear resistance and hardness, high preparation efficiency, good high and low temperature resistance and anti-loosening performance and long service life and a preparation method thereof. The preparation method has the advantages of simple process, convenient operation, small dependence on equipment, high preparation efficiency and higher economic value and social value.
In order to achieve the above purpose, the invention provides a high-strength nut material, which is characterized by comprising a steel substrate and a wear-resistant and corrosion-resistant coating coated on the surface of the steel substrate, wherein the steel substrate comprises the following chemical components in percentage by weight: 0.05 to 0.1 percent of carbon, 0.3 to 0.5 percent of germanium, 0.3 to 0.5 percent of silicon, 3 to 5 percent of copper, 0.1 to 0.2 percent of hafnium, 2 to 3 percent of tungsten, 0.5 to 0.8 percent of niobium, 0.8 to 1.3 percent of manganese, 3 to 6 percent of chromium, 0.001 to 0.003 percent of palladium, less than or equal to 0.001 percent of arsenic, less than or equal to 0.01 percent of sulfur and the balance of iron; the wear-resistant and corrosion-resistant coating is prepared from the following components in parts by weight: 50-60 parts of epoxy group-containing polysiloxane borane hyperbranched polymer, 4-6 parts of nano diamond powder, 3-5 parts of nano boron fiber, 4-6 parts of 3, 5-diamino-1, 2, 4-triazole, 2-4 parts of 2,2' -bis (trifluoromethyl) diaminobiphenyl and 1-3 parts of coupling agent.
Preferably, the coupling agent is at least one of a silane coupling agent KH-550, a silane coupling agent KH-560 and a silane coupling agent KH-570.
Preferably, the average diameter of the nano boron fiber is 300-500nm, and the length-diameter ratio is (10-15): 1.
Preferably, the particle size of the nano diamond powder is 100-300 nm.
Preferably, the epoxy group-containing polysiloxane borane hyperbranched polymer is prepared by the method of example 1 in Chinese patent CN 111363158A.
The second object of the present invention is to provide a method for preparing the high strength nut material, which is characterized by comprising the following steps:
s101, adding raw material iron into a smelting furnace according to a ratio for melting, then sequentially adding an iron-carbon intermediate alloy, an iron-germanium intermediate alloy, an iron-silicon intermediate alloy, an iron-copper intermediate alloy, an iron-hafnium intermediate alloy, an iron-tungsten intermediate alloy, an iron-niobium intermediate alloy, an iron-manganese intermediate alloy, an iron-chromium intermediate alloy, an iron-palladium intermediate alloy and an iron-arsenic intermediate alloy, and preserving heat for 20-30 minutes to obtain an alloy melt;
step S102, adding a refining agent into the molten alloy, spraying inert gas for refining, and obtaining the refined molten alloy after slagging-off and filtering;
step S103, introducing the alloy melt into a mold in a nitrogen atmosphere for cooling, and performing heat treatment on a cooled product to obtain a steel substrate;
and step S104, uniformly mixing all components of the wear-resistant and corrosion-resistant coating to obtain a mixed material, then adding the mixed material into an organic solvent, uniformly stirring, coating the mixed material on the surface of a steel substrate, and drying to obtain the high-strength nut material.
Preferably, the melting temperature in step S101 is 1050-.
Preferably, the refining agent in step S102 is prepared from the following components in parts by weight: 20-25 parts of sodium chloride, 3-6 parts of calcium fluoride, 2-4 parts of ammonium hexafluorosilicate, 0.8-1.2 parts of ferroferric oxide and 1-2 parts of sodium selenide.
Preferably, the mass ratio of the refining agent to the molten alloy in step S102 is 100 (2-3).
Preferably, the inert gas in step S102 is any one of nitrogen, helium, neon and argon.
Preferably, the refining temperature in step S102 is 750-810 ℃, and the refining time is 10-20 min.
Preferably, the heat treatment in step S103 includes a tempering treatment and a quenching treatment; the tempering temperature is 300-; the quenching treatment is graded quenching, and specifically comprises the following steps: heating the product cooled in the mold to 780-820 ℃, preserving heat for 8-13min, quenching the product into oil at 180-260 ℃, preserving heat for 15-20min, taking out the product, and cooling the product at room temperature.
Preferably, the mass ratio of the mixed material to the organic solvent in the step S104 is 1 (0.8-1.2); the organic solvent is at least one of N, N-dimethylacetamide, N-dimethylformamide and N-methylpyrrolidone.
Due to the application of the technical scheme, the invention has the following beneficial effects:
(1) the preparation method of the high-strength nut material disclosed by the invention is simple in process, convenient to operate, low in equipment dependence, high in preparation efficiency and high in economic value and social value.
(2) The high-strength nut material disclosed by the invention comprises a steel substrate and a wear-resistant and corrosion-resistant coating coated on the surface of the steel substrate, and combines the advantages of steel and plastic materials, so that the prepared nut material has high strength, good corrosion resistance and aging resistance, good wear resistance and long service life.
(3) The invention discloses a high-strength nut material, wherein a steel substrate comprises the following chemical components in percentage by weight: 0.05 to 0.1 percent of carbon, 0.3 to 0.5 percent of germanium, 0.3 to 0.5 percent of silicon, 3 to 5 percent of copper, 0.1 to 0.2 percent of hafnium, 2 to 3 percent of tungsten, 0.5 to 0.8 percent of niobium, 0.8 to 1.3 percent of manganese, 3 to 6 percent of chromium, 0.001 to 0.003 percent of palladium, less than or equal to 0.001 percent of arsenic, less than or equal to 0.01 percent of sulfur and the balance of iron; through the mutual matching and the combined action of the components, the manufactured nut material has excellent mechanical property, wear resistance and corrosion resistance.
(4) The invention discloses a high-strength nut material, wherein a wear-resistant and corrosion-resistant coating is prepared from the following components in parts by weight: 50-60 parts of epoxy group-containing polysiloxane borane hyperbranched polymer, 4-6 parts of nano diamond powder, 3-5 parts of nano boron fiber, 4-6 parts of 3, 5-diamino-1, 2, 4-triazole, 2-4 parts of 2,2' -bis (trifluoromethyl) diaminobiphenyl and 1-3 parts of coupling agent. Epoxy groups on the polysiloxane borane hyperbranched polymer containing the epoxy groups can chemically react with amino groups on 3, 5-diamino-1, 2, 4-triazole and 2,2' -bis (trifluoromethyl) diaminobiphenyl to form a three-dimensional network structure, so that the comprehensive performance and the performance stability of the polysiloxane borane hyperbranched polymer are effectively improved; the hyperbranched structure, the siloxane borane, the triazole and the fluorine-containing biphenyl structure are simultaneously introduced into the coating structure, and the interaction of the hyperbranched structure, the siloxane borane, the triazole and the fluorine-containing biphenyl structure mutually influences, so that the coating has excellent aging resistance, mechanical property, wear resistance and corrosion resistance; hydroxyl introduced in the crosslinking reaction process can improve the bonding property with the matrix; the addition of the nano diamond powder and the nano boron fiber can improve the mechanical property of the coating and improve the wear resistance.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Example 1
The high-strength nut material is characterized by comprising a steel base body and a wear-resistant and corrosion-resistant coating coated on the surface of the steel base body, wherein the steel base body comprises the following chemical components in percentage by weight: 0.05% of carbon, 0.3% of germanium, 0.3% of silicon, 3% of copper, 0.1% of hafnium, 2% of tungsten, 0.5% of niobium, 0.8% of manganese, 3% of chromium, 0.001% of palladium, less than or equal to 0.001% of arsenic, less than or equal to 0.01% of sulfur and the balance of iron; the wear-resistant and corrosion-resistant coating is prepared from the following components in parts by weight: 50 parts of epoxy group-containing polysiloxane borane hyperbranched polymer, 4 parts of nano diamond powder, 3 parts of nano boron fiber, 4 parts of 3, 5-diamino-1, 2, 4-triazole, 2 parts of 2,2' -bis (trifluoromethyl) diaminobiphenyl and 1 part of coupling agent.
The coupling agent is a silane coupling agent KH-550; the average diameter of the nano boron fiber is 300nm, and the length-diameter ratio is 10: 1; the grain diameter of the nano diamond powder is 100 nm; the epoxy group-containing polysiloxane borane hyperbranched polymer is prepared by the method of example 1 in Chinese invention patent CN 111363158A.
The preparation method of the high-strength nut material is characterized by comprising the following steps of:
s101, adding raw material iron into a smelting furnace according to a ratio for melting, then sequentially adding an iron-carbon intermediate alloy, an iron-germanium intermediate alloy, an iron-silicon intermediate alloy, an iron-copper intermediate alloy, an iron-hafnium intermediate alloy, an iron-tungsten intermediate alloy, an iron-niobium intermediate alloy, an iron-manganese intermediate alloy, an iron-chromium intermediate alloy, an iron-palladium intermediate alloy and an iron-arsenic intermediate alloy, and preserving heat for 20 minutes to obtain an alloy melt;
step S102, adding a refining agent into the molten alloy, spraying inert gas for refining, and obtaining the refined molten alloy after slagging-off and filtering;
step S103, introducing the alloy melt into a mold in a nitrogen atmosphere for cooling, and performing heat treatment on a cooled product to obtain a steel substrate;
and step S104, uniformly mixing all components of the wear-resistant and corrosion-resistant coating to obtain a mixed material, then adding the mixed material into an organic solvent, uniformly stirring, coating the mixed material on the surface of a steel substrate, and drying to obtain the high-strength nut material.
The melting temperature in step S101 is 1050 ℃; in the step S102, the refining agent is prepared from the following components in parts by weight: 20 parts of sodium chloride, 3 parts of calcium fluoride, 2 parts of ammonium hexafluorosilicate, 0.8 part of ferroferric oxide and 1 part of sodium selenide; in the step S102, the mass ratio of the refining agent to the alloy melt is 100: 2; in the step S102, the inert gas is nitrogen; in the step S102, the refining temperature is 750 ℃, and the refining time is 10 min.
The heat treatment in step S103 includes a tempering treatment and a quenching treatment; the tempering temperature is 300 ℃, and the heat preservation time is 1 hour; the quenching treatment is graded quenching, and specifically comprises the following steps: heating the product cooled in the mold to 780 ℃, preserving heat for 8min, quenching the product into oil at the temperature of 180 ℃, preserving heat for 15min, taking out the product, and cooling the product at room temperature.
In the step S104, the mass ratio of the mixed material to the organic solvent is 1: 0.8; the organic solvent is N, N-dimethylacetamide.
Example 2
The high-strength nut material is characterized by comprising a steel base body and a wear-resistant and corrosion-resistant coating coated on the surface of the steel base body, wherein the steel base body comprises the following chemical components in percentage by weight: 0.07% of carbon, 0.35% of germanium, 0.35% of silicon, 3.5% of copper, 0.12% of hafnium, 2.3% of tungsten, 0.6% of niobium, 0.9% of manganese, 4% of chromium, 0.0015% of palladium, less than or equal to 0.001% of arsenic, less than or equal to 0.01% of sulfur and the balance of iron; the wear-resistant and corrosion-resistant coating is prepared from the following components in parts by weight: 53 parts of epoxy group-containing polysiloxane borane hyperbranched polymer, 4.5 parts of nano diamond powder, 3.5 parts of nano boron fiber, 4.5 parts of 3, 5-diamino-1, 2, 4-triazole, 2.5 parts of 2,2' -bis (trifluoromethyl) diaminobiphenyl and 1.5 parts of coupling agent.
The coupling agent is a silane coupling agent KH-560; the average diameter of the nano boron fiber is 350nm, and the length-diameter ratio is 12: 1; the grain diameter of the nano diamond powder is 150 nm; the epoxy group-containing polysiloxane borane hyperbranched polymer is prepared by the method of example 1 in Chinese invention patent CN 111363158A.
The preparation method of the high-strength nut material is characterized by comprising the following steps of:
s101, adding raw material iron into a smelting furnace according to a ratio for melting, then sequentially adding an iron-carbon intermediate alloy, an iron-germanium intermediate alloy, an iron-silicon intermediate alloy, an iron-copper intermediate alloy, an iron-hafnium intermediate alloy, an iron-tungsten intermediate alloy, an iron-niobium intermediate alloy, an iron-manganese intermediate alloy, an iron-chromium intermediate alloy, an iron-palladium intermediate alloy and an iron-arsenic intermediate alloy, and keeping the temperature for 23 minutes to obtain an alloy melt;
step S102, adding a refining agent into the molten alloy, spraying inert gas for refining, and obtaining the refined molten alloy after slagging-off and filtering;
step S103, introducing the alloy melt into a mold in a nitrogen atmosphere for cooling, and performing heat treatment on a cooled product to obtain a steel substrate;
and step S104, uniformly mixing all components of the wear-resistant and corrosion-resistant coating to obtain a mixed material, then adding the mixed material into an organic solvent, uniformly stirring, coating the mixed material on the surface of a steel substrate, and drying to obtain the high-strength nut material.
In step S101, the melting temperature is 1100 ℃; in the step S102, the refining agent is prepared from the following components in parts by weight: 22 parts of sodium chloride, 4 parts of calcium fluoride, 2.5 parts of ammonium hexafluorosilicate, 0.9 part of ferroferric oxide and 1.2 parts of sodium selenide; in the step S102, the mass ratio of the refining agent to the alloy melt is 100: 2.3; in the step S102, the inert gas is helium; in the step S102, the refining temperature is 770 ℃, and the refining time is 12 min.
The heat treatment in step S103 includes a tempering treatment and a quenching treatment; the tempering temperature is 320 ℃, and the heat preservation time is 1.2 hours; the quenching treatment is graded quenching, and specifically comprises the following steps: heating the product cooled in the mold to 790 ℃, preserving heat for 9min, quenching the product into oil at 200 ℃, preserving heat for 17min, taking out the product, and cooling the product at room temperature.
In the step S104, the mass ratio of the mixed material to the organic solvent is 1: 0.9; the organic solvent is N, N-dimethylformamide.
Example 3
The high-strength nut material is characterized by comprising a steel base body and a wear-resistant and corrosion-resistant coating coated on the surface of the steel base body, wherein the steel base body comprises the following chemical components in percentage by weight: 0.08 percent of carbon, 0.4 percent of germanium, 0.4 percent of silicon, 4 percent of copper, 0.15 percent of hafnium, 2.5 percent of tungsten, 0.65 percent of niobium, 1.1 percent of manganese, 4.5 percent of chromium, 0.002 percent of palladium, less than or equal to 0.001 percent of arsenic, less than or equal to 0.01 percent of sulfur and the balance of iron; the wear-resistant and corrosion-resistant coating is prepared from the following components in parts by weight: 55 parts of epoxy group-containing polysiloxane borane hyperbranched polymer, 5 parts of nano diamond powder, 4 parts of nano boron fiber, 5 parts of 3, 5-diamino-1, 2, 4-triazole, 3 parts of 2,2' -bis (trifluoromethyl) diaminobiphenyl and 2 parts of coupling agent.
The coupling agent is a silane coupling agent KH-570; the average diameter of the nano boron fiber is 400nm, and the length-diameter ratio is 13: 1; the grain diameter of the nano diamond powder is 200 nm; the epoxy group-containing polysiloxane borane hyperbranched polymer is prepared by the method of example 1 in Chinese invention patent CN 111363158A.
The preparation method of the high-strength nut material is characterized by comprising the following steps of:
s101, adding raw material iron into a smelting furnace according to a ratio for melting, then sequentially adding an iron-carbon intermediate alloy, an iron-germanium intermediate alloy, an iron-silicon intermediate alloy, an iron-copper intermediate alloy, an iron-hafnium intermediate alloy, an iron-tungsten intermediate alloy, an iron-niobium intermediate alloy, an iron-manganese intermediate alloy, an iron-chromium intermediate alloy, an iron-palladium intermediate alloy and an iron-arsenic intermediate alloy, and keeping the temperature for 25 minutes to obtain an alloy melt;
step S102, adding a refining agent into the molten alloy, spraying inert gas for refining, and obtaining the refined molten alloy after slagging-off and filtering;
step S103, introducing the alloy melt into a mold in a nitrogen atmosphere for cooling, and performing heat treatment on a cooled product to obtain a steel substrate;
and step S104, uniformly mixing all components of the wear-resistant and corrosion-resistant coating to obtain a mixed material, then adding the mixed material into an organic solvent, uniformly stirring, coating the mixed material on the surface of a steel substrate, and drying to obtain the high-strength nut material.
The melting temperature in step S101 is 1150 ℃; in the step S102, the refining agent is prepared from the following components in parts by weight: 23 parts of sodium chloride, 4.5 parts of calcium fluoride, 3 parts of ammonium hexafluorosilicate, 1 part of ferroferric oxide and 1.5 parts of sodium selenide; in the step S102, the mass ratio of the refining agent to the alloy melt is 100: 2.5; in the step S102, the inert gas is neon; in the step S102, the refining temperature is 790 ℃, and the refining time is 15 min.
The heat treatment in step S103 includes a tempering treatment and a quenching treatment; the tempering temperature is 350 ℃, and the heat preservation time is 1.5 hours; the quenching treatment is graded quenching, and specifically comprises the following steps: heating the product cooled in the mold to 800 ℃, preserving heat for 11min, quenching the product into oil at the temperature of 240 ℃, preserving heat for 18min, taking out the product, and cooling the product at room temperature.
In the step S104, the mass ratio of the mixed material to the organic solvent is 1: 1; the organic solvent is N-methyl pyrrolidone.
Example 4
The high-strength nut material is characterized by comprising a steel base body and a wear-resistant and corrosion-resistant coating coated on the surface of the steel base body, wherein the steel base body comprises the following chemical components in percentage by weight: 0.09% of carbon, 0.45% of germanium, 0.45% of silicon, 4.5% of copper, 0.18% of hafnium, 2.8% of tungsten, 0.75% of niobium, 1.2% of manganese, 5.5% of chromium, 0.0025% of palladium, less than or equal to 0.001% of arsenic, less than or equal to 0.01% of sulfur and the balance of iron; the wear-resistant and corrosion-resistant coating is prepared from the following components in parts by weight: 58 parts of epoxy group-containing polysiloxane borane hyperbranched polymer, 5.5 parts of nano diamond powder, 4.5 parts of nano boron fiber, 5.5 parts of 3, 5-diamino-1, 2, 4-triazole, 3.5 parts of 2,2' -bis (trifluoromethyl) diaminobiphenyl and 2.5 parts of coupling agent.
The coupling agent is a mixture formed by mixing a silane coupling agent KH-550, a silane coupling agent KH-560 and a silane coupling agent KH-570 according to a mass ratio of 1:2: 4; the average diameter of the nano boron fiber is 480nm, and the length-diameter ratio is 14: 1; the grain diameter of the nano diamond powder is 260 nm; the epoxy group-containing polysiloxane borane hyperbranched polymer is prepared by the method of example 1 in Chinese invention patent CN 111363158A.
The preparation method of the high-strength nut material is characterized by comprising the following steps of:
s101, adding raw material iron into a smelting furnace according to a ratio for melting, then sequentially adding an iron-carbon intermediate alloy, an iron-germanium intermediate alloy, an iron-silicon intermediate alloy, an iron-copper intermediate alloy, an iron-hafnium intermediate alloy, an iron-tungsten intermediate alloy, an iron-niobium intermediate alloy, an iron-manganese intermediate alloy, an iron-chromium intermediate alloy, an iron-palladium intermediate alloy and an iron-arsenic intermediate alloy, and preserving heat for 28 minutes to obtain an alloy melt;
step S102, adding a refining agent into the molten alloy, spraying inert gas for refining, and obtaining the refined molten alloy after slagging-off and filtering;
step S103, introducing the alloy melt into a mold in a nitrogen atmosphere for cooling, and performing heat treatment on a cooled product to obtain a steel substrate;
and step S104, uniformly mixing all components of the wear-resistant and corrosion-resistant coating to obtain a mixed material, then adding the mixed material into an organic solvent, uniformly stirring, coating the mixed material on the surface of a steel substrate, and drying to obtain the high-strength nut material.
The melting temperature in step S101 is 1230 ℃; in the step S102, the refining agent is prepared from the following components in parts by weight: 23 parts of sodium chloride, 5.5 parts of calcium fluoride, 3.5 parts of ammonium hexafluorosilicate, 1.1 parts of ferroferric oxide and 1.8 parts of sodium selenide; in the step S102, the mass ratio of the refining agent to the alloy melt is 100: 2.8; in the step S102, the inert gas is argon; in the step S102, the refining temperature is 800 ℃, and the refining time is 18 min.
The heat treatment in step S103 includes a tempering treatment and a quenching treatment; the tempering temperature is 300-; the quenching treatment is graded quenching, and specifically comprises the following steps: heating the product cooled in the mold to 810 ℃, preserving heat for 12min, quenching the product into oil at the temperature of 250 ℃, preserving heat for 19min, taking out the product, and air-cooling the product at room temperature; in the step S104, the mass ratio of the mixed material to the organic solvent is 1: 1.1; the organic solvent is a mixture formed by mixing N, N-dimethylacetamide, N-dimethylformamide and N-methylpyrrolidone according to a mass ratio of 1:2: 3.
Example 5
The high-strength nut material is characterized by comprising a steel base body and a wear-resistant and corrosion-resistant coating coated on the surface of the steel base body, wherein the steel base body comprises the following chemical components in percentage by weight: 0.1% of carbon, 0.5% of germanium, 0.5% of silicon, 5% of copper, 0.2% of hafnium, 3% of tungsten, 0.8% of niobium, 1.3% of manganese, 6% of chromium, 0.003% of palladium, less than or equal to 0.001% of arsenic, less than or equal to 0.01% of sulfur and the balance of iron; the wear-resistant and corrosion-resistant coating is prepared from the following components in parts by weight: 60 parts of epoxy group-containing polysiloxane borane hyperbranched polymer, 6 parts of nano diamond powder, 5 parts of nano boron fiber, 6 parts of 3, 5-diamino-1, 2, 4-triazole, 4 parts of 2,2' -bis (trifluoromethyl) diaminobiphenyl and 3 parts of coupling agent.
The coupling agent is a silane coupling agent KH-550; the average diameter of the nano boron fiber is 500nm, and the length-diameter ratio is 15: 1; the grain diameter of the nano diamond powder is 300 nm; the epoxy group-containing polysiloxane borane hyperbranched polymer is prepared by the method of example 1 in Chinese invention patent CN 111363158A.
The preparation method of the high-strength nut material is characterized by comprising the following steps of:
s101, adding raw material iron into a smelting furnace according to a ratio for melting, then sequentially adding an iron-carbon intermediate alloy, an iron-germanium intermediate alloy, an iron-silicon intermediate alloy, an iron-copper intermediate alloy, an iron-hafnium intermediate alloy, an iron-tungsten intermediate alloy, an iron-niobium intermediate alloy, an iron-manganese intermediate alloy, an iron-chromium intermediate alloy, an iron-palladium intermediate alloy and an iron-arsenic intermediate alloy, and preserving heat for 30 minutes to obtain an alloy melt;
step S102, adding a refining agent into the molten alloy, spraying inert gas for refining, and obtaining the refined molten alloy after slagging-off and filtering;
step S103, introducing the alloy melt into a mold in a nitrogen atmosphere for cooling, performing a hot treatment step S104 on the cooled product, uniformly mixing the components of the wear-resistant and corrosion-resistant coating to obtain a mixed material, adding the mixed material into an organic solvent, uniformly stirring, coating the mixed material on the surface of a steel substrate, and drying to obtain the high-strength nut material.
The melting temperature in step S101 is 1250 ℃; in the step S102, the refining agent is prepared from the following components in parts by weight: 25 parts of sodium chloride, 6 parts of calcium fluoride, 4 parts of ammonium hexafluorosilicate, 1.2 parts of ferroferric oxide and 2 parts of sodium selenide; in the step S102, the mass ratio of the refining agent to the alloy melt is 100: 3; in the step S102, the inert gas is nitrogen; in the step S102, the refining temperature is 810 ℃, and the refining time is 20 min.
The heat treatment in step S103 includes a tempering treatment and a quenching treatment; the tempering temperature is 380 ℃, and the heat preservation time is 2 hours; the quenching treatment is graded quenching, and specifically comprises the following steps: heating the product cooled in the mold to 780-820 ℃, preserving heat for 13min, quenching the product into oil at 260 ℃, preserving heat for 20min, and taking out the product to cool at room temperature; in the step S104, the mass ratio of the mixed material to the organic solvent is 1: 1.2; the organic solvent is N-methyl pyrrolidone.
Comparative example 1
The present example provides a high strength nut material, which is substantially the same as example 1 in formulation and preparation method, except that: the chemical composition of the steel matrix excludes germanium and hafnium.
Comparative example 2
The present example provides a high strength nut material, which is substantially the same as example 1 in formulation and preparation method, except that: the chemical composition of the steel matrix excludes tungsten and niobium.
Comparative example 3
The present example provides a high strength nut material, which is substantially the same as example 1 in formulation and preparation method, except that: the chemical composition of the steel matrix excludes palladium and arsenic.
Comparative example 4
The present example provides a high strength nut material, which is substantially the same as example 1 in formulation and preparation method, except that: the components of the wear-resistant and corrosion-resistant coating do not comprise 3, 5-diamino-1, 2, 4-triazole.
In order to further illustrate the beneficial technical effects of the high-strength nut materials involved in the embodiments of the present invention, the high-strength nut materials described in the embodiments 1 to 5 and the comparative examples 1 to 4 were subjected to performance tests according to the corresponding national standards, wherein the corrosion rate test method is referred to as the corrosion resistance test method in CN 104046843 a, and the test results are shown in table 1.
As can be seen from table 1, the high-strength nut material disclosed in the examples of the present invention has more excellent strength, hardness, wear resistance and corrosion resistance than the comparative example product, which is a result of the synergistic effect of the respective components.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The high-strength nut material is characterized by comprising a steel base body and a wear-resistant and corrosion-resistant coating coated on the surface of the steel base body, wherein the steel base body comprises the following chemical components in percentage by weight: 0.05 to 0.1 percent of carbon, 0.3 to 0.5 percent of germanium, 0.3 to 0.5 percent of silicon, 3 to 5 percent of copper, 0.1 to 0.2 percent of hafnium, 2 to 3 percent of tungsten, 0.5 to 0.8 percent of niobium, 0.8 to 1.3 percent of manganese, 3 to 6 percent of chromium, 0.001 to 0.003 percent of palladium, less than or equal to 0.001 percent of arsenic, less than or equal to 0.01 percent of sulfur and the balance of iron; the wear-resistant and corrosion-resistant coating is prepared from the following components in parts by weight: 50-60 parts of epoxy group-containing polysiloxane borane hyperbranched polymer, 4-6 parts of nano diamond powder, 3-5 parts of nano boron fiber, 4-6 parts of 3, 5-diamino-1, 2, 4-triazole, 2-4 parts of 2,2' -bis (trifluoromethyl) diaminobiphenyl and 1-3 parts of coupling agent.
2. The high-strength nut material as claimed in claim 1, wherein said coupling agent is at least one of silane coupling agent KH-550, silane coupling agent KH-560, and silane coupling agent KH-570.
3. The high-strength nut material as claimed in claim 1, wherein the nano boron fiber has an average diameter of 300-500nm, an aspect ratio of (10-15): 1; the particle size of the nano diamond powder is 100-300 nm.
4. A method for preparing a high-strength nut material according to any one of claims 1 to 3, comprising the steps of:
s101, adding raw material iron into a smelting furnace according to a ratio for melting, then sequentially adding an iron-carbon intermediate alloy, an iron-germanium intermediate alloy, an iron-silicon intermediate alloy, an iron-copper intermediate alloy, an iron-hafnium intermediate alloy, an iron-tungsten intermediate alloy, an iron-niobium intermediate alloy, an iron-manganese intermediate alloy, an iron-chromium intermediate alloy, an iron-palladium intermediate alloy and an iron-arsenic intermediate alloy, and preserving heat for 20-30 minutes to obtain an alloy melt;
step S102, adding a refining agent into the molten alloy, spraying inert gas for refining, and obtaining the refined molten alloy after slagging-off and filtering;
step S103, introducing the alloy melt into a mold in a nitrogen atmosphere for cooling, and performing heat treatment on a cooled product to obtain a steel substrate;
and step S104, uniformly mixing all components of the wear-resistant and corrosion-resistant coating to obtain a mixed material, then adding the mixed material into an organic solvent, uniformly stirring, coating the mixed material on the surface of a steel substrate, and drying to obtain the high-strength nut material.
5. The method as claimed in claim 4, wherein the melting temperature in step S101 is 1050-1250 ℃.
6. The method for preparing a high-strength nut material according to claim 4, wherein the refining agent in step S102 is prepared from the following components in parts by weight: 20-25 parts of sodium chloride, 3-6 parts of calcium fluoride, 2-4 parts of ammonium hexafluorosilicate, 0.8-1.2 parts of ferroferric oxide and 1-2 parts of sodium selenide; in the step S102, the mass ratio of the refining agent to the alloy melt is 100 (2-3).
7. The method for preparing a high-strength nut material according to claim 4, wherein the inert gas in step S102 is any one of nitrogen, helium, neon and argon; in the step S102, the refining temperature is 750-810 ℃, and the refining time is 10-20 min.
8. The method for producing a high-strength nut material according to claim 4, wherein the heat treatment in step S103 includes a tempering treatment and a quenching treatment; the tempering temperature is 300-; the quenching treatment is graded quenching, and specifically comprises the following steps: heating the product cooled in the mold to 780-820 ℃, preserving heat for 8-13min, quenching the product into oil at 180-260 ℃, preserving heat for 15-20min, taking out the product, and cooling the product at room temperature.
9. The method for preparing the high-strength nut material according to claim 4, wherein the mass ratio of the mixed material to the organic solvent in step S104 is 1 (0.8-1.2); the organic solvent is at least one of N, N-dimethylacetamide, N-dimethylformamide and N-methylpyrrolidone.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114875307A (en) * | 2022-04-02 | 2022-08-09 | 宁波金鼎紧固件有限公司 | High-strength corrosion-resistant bolt material and preparation method thereof |
| CN114908303A (en) * | 2022-04-28 | 2022-08-16 | 宁波金鼎紧固件有限公司 | Composite material for fastener and preparation method thereof |
| CN116396681A (en) * | 2023-03-29 | 2023-07-07 | 中科融志国际科技(北京)有限公司 | Anti-icing coating and fan blade |
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| JP2005139485A (en) * | 2003-11-05 | 2005-06-02 | Nippon Steel Corp | Steel sheet to be hot-formed |
| CN104053806A (en) * | 2012-01-26 | 2014-09-17 | 杰富意钢铁株式会社 | High-strength hot-rolled steel sheet and method for producing same |
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| JP2005139485A (en) * | 2003-11-05 | 2005-06-02 | Nippon Steel Corp | Steel sheet to be hot-formed |
| CN104053806A (en) * | 2012-01-26 | 2014-09-17 | 杰富意钢铁株式会社 | High-strength hot-rolled steel sheet and method for producing same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875307A (en) * | 2022-04-02 | 2022-08-09 | 宁波金鼎紧固件有限公司 | High-strength corrosion-resistant bolt material and preparation method thereof |
| CN114875307B (en) * | 2022-04-02 | 2022-11-15 | 宁波金鼎紧固件有限公司 | High-strength corrosion-resistant bolt material and preparation method thereof |
| CN114908303A (en) * | 2022-04-28 | 2022-08-16 | 宁波金鼎紧固件有限公司 | Composite material for fastener and preparation method thereof |
| CN114908303B (en) * | 2022-04-28 | 2022-11-15 | 宁波金鼎紧固件有限公司 | Composite material for fastener and preparation method thereof |
| CN116396681A (en) * | 2023-03-29 | 2023-07-07 | 中科融志国际科技(北京)有限公司 | Anti-icing coating and fan blade |
| CN116396681B (en) * | 2023-03-29 | 2024-03-22 | 中科融志国际科技(北京)有限公司 | Anti-condensation anti-icing coating and fan blade |
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