An environmentally friendly lightweight spoke for bicycles and its processing technology

Abstract

The invention discloses an environmentally friendly lightweight spoke for a bicycle, comprising: a spoke body and an environmentally friendly paint; wherein the chemical composition of the spoke body contains, by mass%, C: 0.05-0.25%, Mn: 0.2-1.5%, S: 0.3-1.2%, Ti: 0.05-0.35%, Si: 0.03-0.63%, P: 0.005-0.02%, Al: 0.08-0.2%, Mo: 0.16-0.5%, N: 0.0001-0.0010%, and Rare earth elements: 0-0.005%, the rest is Fe and impurities; the environmentally friendly paint contains by mass fraction: 50-80 parts of fluorite, 8-16 parts of manganese powder, 40-70 parts of iron-rich rutile, 12-25 parts of potassium carbonate, 14-30 parts of sodium carbonate, 15-25 parts of potassium chloride, 10-30 parts of sodium chloride, 13-20 parts of sodium nitrite, 8-15 parts of potassium chlorate, 5-15 parts of sodium chlorate, 30-55 parts of citric acid, 40-65 parts of urea, 100-300 parts of toluene. The present invention prepares the spoke body and the environmentally friendly paint by proportioning and process, obtains the spoke body with high strength and high toughness and the corrosion-resistant environmentally friendly paint, and finally electroplates the environmentally friendly paint to the spoke body to improve the appearance and service life of the spoke.

Description

Technical Field

[0001] The invention belongs to the technical field of bicycle spokes, and in particular relates to an environmentally friendly lightweight spoke for bicycles and a processing technology thereof. Background Art

[0002] Spokes are many rods, bars or straight lines extending outward from a center or hub on the same plane. Bicycle spokes, also called spokes, are straight sticks or steel bars that connect the hub and rim in the wheel. Spokes in bicycles have the functions of increasing the strength of the rim, supporting the tire, and adjusting the tightness of the spokes to ensure the stability of the bicycle.

[0003] During the processing and production of existing spokes, a layer of protective paint needs to be plated on the surface of the steel bar after forming to extend the service life of the spokes. Electroplating paint is usually used to coat the surface of the spokes. Electroplating paint is a low-pollution, environmentally friendly anti-corrosion water-based paint with the advantages of good water resistance and chemical resistance. In particular, cathode electroplating paint with high anti-corrosion performance is widely used as a primer on spokes. However, the uniformity of existing electroplating paint is too low, and the stability is also low. After the electroplating paint is used on the spokes, the surface of the paint film is uneven and the surface is relatively dry, which does not meet the requirements of beauty and practicality. In addition, the quality of the wire used for the spokes is also high or low, and the strength and toughness need to be optimized. For this reason, the technicians in this field have proposed an environmentally friendly lightweight spoke for bicycles and its processing technology. Summary of the invention

[0004] In view of this, the technical problem to be solved by the present invention is to provide an environmentally friendly lightweight spoke for bicycles and a processing technology thereof, so as to avoid the problems that the uniformity of the electroplating paint on the bicycle spokes is too low, the stability is also low, and the surface of the paint film is uneven after the electroplating paint is used on the spokes, and the surface is relatively dry, which fails to meet the requirements of beauty and practicality.

[0005] In order to solve the above technical problems, the present invention discloses an environmentally friendly lightweight spoke for a bicycle, which comprises: a spoke body and an environmentally friendly paint arranged on the spoke body;

[0006] The chemical composition of the spoke body is as follows:

[0007] C: 0.05-0.25%, Mn: 0.2-1.5%, S: 0.3-1.2%, Ti: 0.05-0.35%, Si: 0.03-0.63%, P: 0.005 -0.02%, Al: 0.08-0.2%, Mo: 0.16-0.5%, N: 0.0001-0.0010%, and rare earth elements: 0-0.005%, the rest is Fe and impurities;

[0008] Environmentally friendly paint contains by mass fraction:

[0009] 50-80 parts of fluorite, 8-16 parts of manganese powder, 40-70 parts of iron-rich rutile, 12-25 parts of potassium carbonate, 14-30 parts of sodium carbonate, 15-25 parts of potassium chloride, 10-30 parts of sodium chloride, 13-20 parts of sodium nitrite, 8-15 parts of potassium chlorate, 5-15 parts of sodium chlorate, 30-55 parts of citric acid, 40-65 parts of urea, and 100-300 parts of toluene.

[0010] According to one embodiment of the present invention, the rare earth element is selected from La.

[0011] According to one embodiment of the present invention, the chemical composition of the spoke body contains, in mass %, the following:

[0012] C: 0.15%, Mn: 1.0%, S: 0.7%, Ti: 0.22%, Si: 0.28%, P: 0.01%, Al: 0.12%, Mo: 0.32%, N: 0.0005%, and rare earth elements: 0.003%, and the remainder is Fe and impurities.

[0013] According to one embodiment of the present invention, the environmentally friendly paint contains, by mass fraction:

[0014] 65 parts of fluorite, 12 parts of manganese powder, 55 parts of iron-rich rutile, 20 parts of potassium carbonate, 22 parts of sodium carbonate, 21 parts of potassium chloride, 20 parts of sodium chloride, 16 parts of sodium nitrite, 10 parts of potassium chlorate, 8 parts of sodium chlorate, 45 parts of citric acid, 55 parts of urea, and 200 parts of toluene.

[0015] A process for processing an environmentally friendly and lightweight spoke for a bicycle, comprising:

[0016] Step a. providing molten steel for pre-deoxidation smelting, while adding Ti, Al, Mo, N, and La according to the mass percentage for stirring and refining;

[0017] Step b. Pour the refined molten steel into a vacuum degassing device for full degassing, and then pour the molten steel into a mold for solidification to form a wire blank;

[0018] Step c. Cleaning the cooled wire blank by first using a 2.0-4.0% sodium carbonate alkali alcohol solution and ultrasonic treatment in deionized water for 30-45 minutes, and then drying for standby use to obtain a cleaned wire blank;

[0019] Step d. performing high temperature diffusion annealing on the wire blank, performing surface hardening treatment by carburizing process, and cooling to obtain the finished wire;

[0020] Step e. machining the spoke body, cleaning and drying;

[0021] Step f. Provide a predetermined number of environmentally friendly paint raw materials, remove toluene, and place them in a planetary ball mill for wet grinding. The ball milling medium is anhydrous ethanol, the grinding ball material is zirconium dioxide, the mass ratio of the mixture, the grinding ball and the anhydrous ethanol is 1:5:1.2, the ball milling time is 8-12 hours, and the ball mill speed is 250-350 rpm;

[0022] Step g. The ball mill is crushed, sieved, calcined, coarsely crushed, and then added to a plasma ball mill, and after adding a chemical activator and a grinding aid, the mixture is ball milled for 1-2h at a ball mill speed of 300-500rpm to obtain an ultrafine powder;

[0023] Step h. Add the ultrafine powder to toluene and stir to obtain an environmentally friendly paint;

[0024] Step i. Send the spokes obtained in step e to an electroplating workshop, coat them with the environmentally friendly paint in step h, and dry them to obtain finished spokes.

[0025] Compared with the prior art, the present invention can achieve the following technical effects:

[0026] The spoke body and environmentally friendly paint are manufactured through proportioning and processing, and a spoke body with high strength and high toughness and a corrosion-resistant environmentally friendly paint are obtained. Finally, the environmentally friendly paint is electroplated to the spoke body to improve the appearance and service life of the spoke.

[0027] Of course, any product implementing the present invention does not necessarily need to achieve all of the above-mentioned technical effects at the same time. DETAILED DESCRIPTION

[0028] The following will describe the implementation methods of the present invention in detail with reference to examples, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0029] The invention discloses an environmentally friendly lightweight spoke for a bicycle, which comprises: a spoke body and an environmentally friendly paint arranged on the spoke body;

[0030] The chemical composition of the spoke body is as follows:

[0031] C: 0.05-0.25%, Mn: 0.2-1.5%, S: 0.3-1.2%, Ti: 0.05-0.35%, Si: 0.03-0.63%, P: 0.005 -0.02%, Al: 0.08-0.2%, Mo: 0.16-0.5%, N: 0.0001-0.0010%, and rare earth elements: 0-0.005%, the rest is Fe and impurities;

[0032] Environmentally friendly paint contains by mass fraction:

[0033] 50-80 parts of fluorite, 8-16 parts of manganese powder, 40-70 parts of iron-rich rutile, 12-25 parts of potassium carbonate, 14-30 parts of sodium carbonate, 15-25 parts of potassium chloride, 10-30 parts of sodium chloride, 13-20 parts of sodium nitrite, 8-15 parts of potassium chlorate, 5-15 parts of sodium chlorate, 30-55 parts of citric acid, 40-65 parts of urea, and 100-300 parts of toluene.

[0034] The invention prepares the spoke body and the environmentally friendly paint by respectively proportioning raw materials, thereby maximally ensuring the rigidity and toughness quality of the spoke body and the corrosion resistance of the environmentally friendly paint, producing environmentally friendly light spokes and enhancing the application range.

[0035] Preferably, the rare earth element is selected from La, and the prepared alloy has high durability, strong metallic luster, and is corrosion-resistant and rust-proof.

[0036] In a preferred embodiment, the chemical composition of the spoke body contains, in mass %, the following:

[0037] C: 0.15%, Mn: 1.0%, S: 0.7%, Ti: 0.22%, Si: 0.28%, P: 0.01%, Al: 0.12%, Mo: 0.32%, N: 0.0005%, and rare earth elements: 0.003%, and the rest is Fe and impurities. It is measured that the spoke body prepared in this embodiment has good rigidity and moderate toughness, and can ensure high use strength.

[0038] In a preferred embodiment, the environmentally friendly paint contains, by mass fraction:

[0039] 65 parts of fluorite, 12 parts of manganese powder, 55 parts of iron-rich rutile, 20 parts of potassium carbonate, 22 parts of sodium carbonate, 21 parts of potassium chloride, 20 parts of sodium chloride, 16 parts of sodium nitrite, 10 parts of potassium chlorate, 8 parts of sodium chlorate, 45 parts of citric acid, 55 parts of urea, and 200 parts of toluene. It has been measured that the environmentally friendly paint prepared in this embodiment has good environmental protection, strong adhesion after being finally electroplated to the spoke body, can prevent rust and corrosion, and has good durability. Among them, fluorite, manganese powder, and iron-rich rutile are selected from natural minerals, can form a dense glaze layer, good gloss, and corrosion resistance, while potassium carbonate, sodium carbonate, potassium chloride, sodium chloride, sodium nitrite, potassium chlorate, and sodium chlorate are selected from organic compounds, which can improve the uniformity of the reaction, further enhance the corrosion resistance effect, and can enhance the adhesion after attachment, and is not easy to fall off. Citric acid, urea, and toluene are convenient for paint making and have good environmental protection.

[0040] The present invention also discloses a process for processing an environmentally friendly lightweight spoke for a bicycle, comprising:

[0041] Step a. providing molten steel for pre-deoxidation smelting, adding Ti, Al, Mo, N according to mass percentage, and stirring and refining; it should be understood that ordinary molten steel basically still has C, Mn, S, Si, P, and at this time, it is necessary to add other alloy elements for refining.

[0042] Step b. Pour the refined molten steel into a vacuum degassing device for sufficient degassing, and then pour the molten steel into a mold for solidification to form a wire blank; the strength of the wire blank is improved by refining.

[0043] Step c. Cleaning the cooled wire blank by first using a 2.0-4.0% sodium carbonate alkali alcohol solution and ultrasonic treatment in deionized water for 30-45 minutes, and then drying the wire blank for standby use to obtain a cleaned wire blank; ensuring surface quality.

[0044] Step d. performing high temperature diffusion annealing on the wire blank, performing surface hardening treatment by carburizing process, and cooling to obtain the finished wire to improve the surface strength;

[0045] Step e. machining the spoke body, cleaning and drying it, and then cutting and processing the size and shape of the spoke body according to the specification requirements;

[0046] Step f. Provide a predetermined number of environmentally friendly paint raw materials, remove toluene, and place them in a planetary ball mill for wet grinding. The ball milling medium is anhydrous ethanol, the grinding ball material is zirconium dioxide, the mass ratio of the mixture, the grinding ball and the anhydrous ethanol is 1:5:1.2, the ball milling time is 8-12 hours, and the ball mill speed is 250-350 rpm; after preliminary grinding, the particle size of the raw material powder is reduced.

[0047] Step g. The ball mill is crushed, sieved, calcined, and coarsely crushed, and then added to a plasma ball mill, and after adding a chemical activator and a grinding aid, mixed and ball-milled for 1-2 hours, the ball mill speed is 300-500rpm, to obtain an ultrafine powder; the particle size of this ultrafine powder is less than 0.1μm, and the environmentally friendly paint can be evenly electroplated on the spoke body, and the above raw materials have a surface gloss after mixing.

[0048] Step h. Add the ultrafine powder to toluene and stir to obtain an environmentally friendly paint;

[0049] Step i. Send the spokes obtained in step e to an electroplating workshop, coat them with the environmentally friendly paint in step h, and dry them to obtain finished spokes.

[0050] In summary, the present invention prepares the spoke body and environmentally friendly paint through proportioning and process, obtains a high-strength and high-toughness spoke body and corrosion-resistant environmentally friendly paint, and finally electroplates the environmentally friendly paint to the spoke body to improve the appearance and service life of the spoke.

[0051] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. An environmentally friendly lightweight spoke for a bicycle, characterized in that: include: A spoke body and an environmentally friendly paint disposed on the spoke body; The chemical composition of the spoke body is as follows: C: 0.05-0.25%, Mn: 0.2-1.5%, S: 0.3-1.2%, Ti: 0.05-0.35%, Si: 0.03-0.63%, P: 0.005 -0.02%, Al: 0.08-0.2%, Mo: 0.16-0.5%, N: 0.0001-0.0010%, and rare earth elements: 0-0.005%, the rest is Fe and impurities; The environmentally friendly paint contains, by mass fraction: 50-80 parts of fluorite, 8-16 parts of manganese powder, 40-70 parts of iron-rich rutile, 12-25 parts of potassium carbonate, 14-30 parts of sodium carbonate, 15-25 parts of potassium chloride, 10-30 parts of sodium chloride, 13-20 parts of sodium nitrite, 8-15 parts of potassium chlorate, 5-15 parts of sodium chlorate, 30-55 parts of citric acid, 40-65 parts of urea, and 100-300 parts of toluene.

2. The environmentally friendly lightweight spoke for bicycles according to claim 1, characterized in that: The rare earth element is selected from La.

3. The environmentally friendly lightweight spoke for bicycles according to claim 1, characterized in that: The chemical composition of the spoke body contains, by mass%, the following: C: 0.15%, Mn: 1.0%, S: 0.7%, Ti: 0.22%, Si: 0.28%, P: 0.01%, Al: 0.12%, Mo: 0.32%, N: 0.0005%, and rare earth elements: 0.003%, and the remainder is Fe and impurities.

4. The environmentally friendly lightweight spoke for bicycles according to claim 1, characterized in that: The environmentally friendly paint contains, by mass fraction: 65 parts of fluorite, 12 parts of manganese powder, 55 parts of iron-rich rutile, 20 parts of potassium carbonate, 22 parts of sodium carbonate, 21 parts of potassium chloride, 20 parts of sodium chloride, 16 parts of sodium nitrite, 10 parts of potassium chlorate, 8 parts of sodium chlorate, 45 parts of citric acid, 55 parts of urea, and 200 parts of toluene.

5. A process for processing the environmentally friendly lightweight spokes for bicycles as claimed in claim 1, characterized in that: include: Step a. providing molten steel for pre-deoxidation smelting, while adding Ti, Al, Mo, N, and La according to the mass percentage for stirring and refining; Step b. Pour the refined molten steel into a vacuum degassing device for full degassing, and then pour the molten steel into a mold for solidification to form a wire blank; Step c. Cleaning the cooled wire blank by first using a 2.0-4.0% sodium carbonate alkali alcohol solution and ultrasonic treatment in deionized water for 30-45 minutes, and then drying for standby use to obtain a cleaned wire blank; Step d. performing high temperature diffusion annealing on the wire blank, performing surface hardening treatment by carburizing process, and cooling to obtain the finished wire; Step e. machining the spoke body, cleaning and drying; Step f. Provide a predetermined number of environmentally friendly paint raw materials, remove toluene, and place them in a planetary ball mill for wet grinding. The ball milling medium is anhydrous ethanol, the grinding ball material is zirconium dioxide, the mass ratio of the mixture, the grinding ball and the anhydrous ethanol is 1:5:1.2, the ball milling time is 8-12 hours, and the ball mill speed is 250-350 rpm; Step g. The ball mill is crushed, sieved, calcined, coarsely crushed, and then added to a plasma ball mill, and after adding a chemical activator and a grinding aid, the mixture is ball milled for 1-2h at a ball mill speed of 300-500rpm to obtain an ultrafine powder; Step h. Add the ultrafine powder to toluene and stir to obtain an environmentally friendly paint; Step i. Send the spokes obtained in step e to an electroplating workshop, coat them with the environmentally friendly paint in step h, and dry them to obtain finished spokes.