CN111378814A - Preparation method of axis wire of copier - Google Patents

Preparation method of axis wire of copier Download PDF

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Publication number
CN111378814A
CN111378814A CN201811634637.0A CN201811634637A CN111378814A CN 111378814 A CN111378814 A CN 111378814A CN 201811634637 A CN201811634637 A CN 201811634637A CN 111378814 A CN111378814 A CN 111378814A
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China
Prior art keywords
product
wire
carbon steel
steel wire
treatment
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CN201811634637.0A
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Chinese (zh)
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CN111378814B (en
Inventor
刘晓祥
罗安武
郝小龙
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Dongguan Kelee Wire & Technologies Co ltd
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Dongguan Kelee Wire & Technologies Co ltd
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26Methods of annealing
    • C21D1/32Soft annealing, e.g. spheroidising
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/02Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C3/00Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02Dies; Selection of material therefor; Cleaning thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/047Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire of fine wires
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D6/00Heat treatment of ferrous alloys
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/065Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/525Heat 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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/002Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical 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
    • C23C22/05Chemical 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
    • C23C22/06Chemical 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
    • C23C22/48Chemical 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 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/50Treatment of iron or alloys based thereon
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23GCLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08Iron or steel
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23GCLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00Apparatus for cleaning or pickling metallic material
    • C23G3/02Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously

Abstract

The invention belongs to the technical field of manufacturing of copiers, and particularly relates to a method for preparing an axis wire of a copier, which comprises the following steps: providing a carbon steel wire, wherein the carbon content of the carbon steel wire is 0.18-0.23 wt%, the phosphorus content is less than or equal to 0.030 wt%, the sulfur content is less than or equal to 0.030 wt%, and the aluminum content is more than or equal to 0.020 wt%; carrying out first drawing treatment on the carbon steel wire to obtain a first drawing product; carrying out spheroidizing annealing treatment on the first drawing product to obtain a spheroidizing annealing product; the spheroidizing annealing treatment comprises the following steps: heating the first drawing product to 730-760 ℃ under a protective atmosphere, and preserving heat for 2-4 hours; cooling to 680-690 ℃ at the speed of 5-20 ℃/h, and preserving heat for 4-6 hours; then naturally cooling to normal temperature; performing second drawing treatment on the second product to obtain the product; and the second drawing treatment adopts a wire drawing die, the length of a sizing belt of the wire drawing die is 0.4-0.6 times of the diameter of the carbon steel wire, the working cone angle is 12-14 degrees, and the sizing belt part of the wire drawing die is in a straight tube shape.

Description

Preparation method of axis wire of copier
Technical Field
The invention belongs to the technical field of manufacturing of copiers, and particularly relates to a preparation method of an axis wire of a copier.
Background
Referring to the concept of copying, it can be traced back to 1938 that the first copy of the world was printed in the united states using xerographic technology, which began to serve humans. Since the advent of xerographic copiers in the united states in 1959, there has been interest and interest in the world's information technology world. The application of copy technology in China is relatively late, the electrostatic copy machine is used only in 1964, and the copy machine machinery respectively goes through the infrastructure stage (1964 + 1983), the development period (1984 + 2000), the digital period (2001 + 2009), namely from black and white to color, from single function to multiple function, from analog technology to digital and networking, and will continue to advance along the information, intelligence and humanization targets in the future.
The shaft center of the copying machine is used as an important precise part of the copying machine, and plays a key role in the working efficiency and quality of the copying machine. The copier shaft center needs to be formed by cold heading in the process of processing and forming, and generates larger deformation, so that the wire used for preparing the copier shaft center is required to have good plastic deformation capacity, and the phenomenon of cracking and the like caused by large deformation in the process of cold heading and forming is ensured. Meanwhile, in order to ensure the stable and precise work of the copying machine, the axle center of the copying machine must ensure good concentricity and straightness, and only then can ensure that the machine does not have noise and works stably in the running process, thereby prolonging the service life of the machine.
Although China has become a large country for the production and export of digital copier office equipment and office supplies in the world, more than 60% of copying equipment in the world is produced and manufactured in China. However, the conventional copier shaft manufactured in China has various problems, such as low molding rate and incapability of ensuring the concentricity and straightness of the shaft. Thus, there is still a need for improvements in the art of making copier hubs.
Disclosure of Invention
The invention mainly aims to provide a method for preparing a wire rod of a shaft center of a copying machine, and aims to provide a shaft center of a copying machine with high concentricity and straightness.
In order to achieve the above object, the present invention provides a method for preparing a core wire of a copier, comprising:
providing a carbon steel wire, wherein the carbon content of the carbon steel wire is 0.18-0.23 wt%, the phosphorus content is less than or equal to 0.030 wt%, the sulfur content is less than or equal to 0.030 wt%, and the aluminum content is 0.030-0.060 wt%;
carrying out first drawing treatment on the carbon steel wire to obtain a first drawing product;
carrying out spheroidizing annealing treatment on the first drawing product to obtain a spheroidizing annealing product; the spheroidizing annealing treatment comprises the following steps: under the protective atmosphere, heating the first drawing product to 730-760 ℃, and preserving heat for 2-4 hours; cooling to 680-690 ℃ at the speed of 10-20 ℃/h, and preserving heat for 4-6 hours; then naturally cooling to normal temperature;
performing second drawing treatment on the spheroidized annealed product to obtain the spheroidized annealed product;
and the second drawing treatment adopts a wire drawing die to perform drawing treatment, the length of a sizing belt of the wire drawing die is 0.4-0.6 times of the diameter of the carbon steel wire, the working cone angle is 12-14 degrees, and the sizing belt part of the wire drawing die is in a straight tube shape.
Compared with the prior art, on one hand, the carbon steel wire rod with specific chemical composition is selected as a raw material, and further process optimization is carried out on spheroidizing annealing treatment, so that a good spheroidized structure is obtained after heat treatment, the plastic deformation capability of the wire rod is further improved, the forming rate of the wire rod is improved, meanwhile, a good structure is provided for heat treatment of subsequent products, and the performance of the final product is stable; on the other hand, the sizing belt length and the working cone angle of the wire-drawing die adopted by the second drawing treatment are optimized, and the sizing belt parts of the wire-drawing die are mutually parallel and in a straight cylinder shape, so that the shaft center of the copying machine can be ensured to have good linearity and concentricity.
Drawings
FIG. 1 is a cross-sectional view of a wire-drawing die used in a second drawing process according to an embodiment of the present invention.
Detailed Description
In order to provide a copier shaft center with high concentricity and straightness, so as to ensure that the copier does not have noise and works stably in the running process and prolong the service life of the copier shaft center, the embodiment of the invention provides a manufacturing method of a copier shaft center wire rod.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In one aspect, an embodiment of the present invention provides a method for preparing an axial center wire of a copier, including:
s01, providing a carbon steel wire, wherein the carbon content of the carbon steel wire is 0.18-0.23 wt%, the phosphorus content is less than or equal to 0.030 wt%, the sulfur content is less than or equal to 0.030 wt%, and the aluminum content is 0.030-0.060 wt%;
s02, carrying out first drawing treatment on the carbon steel wire to obtain a first drawing product;
s03, performing spheroidizing annealing treatment on the first drawing product to obtain a spheroidizing annealing product; the spheroidizing annealing treatment comprises the following steps: under the protective atmosphere, heating the first drawing product to 730-760 ℃, and preserving heat for 2-4 hours; cooling to 680-690 ℃ at the speed of 10-20 ℃/h, and preserving heat for 4-6 hours; then naturally cooling to normal temperature;
s04, carrying out second drawing treatment on the spheroidized annealed product to obtain the spheroidized annealed product;
and the second drawing treatment adopts a wire drawing die to perform drawing treatment, the length of a sizing belt of the wire drawing die is 0.4-0.6 times of the diameter of the carbon steel wire, the working cone angle is 12-14 degrees, and the sizing belt part of the wire drawing die is in a straight tube shape.
Specifically, in step S01, the carbon content of the carbon steel wire rod is 0.18 wt% to 0.23 wt%. The carbon content influences the hardness of the heat-treated product, and when the carbon content is lower than 0.18 wt%, the hardness is lower; when the carbon content is more than 0.23 wt%, the hardness is high, the molding is poor, the steel plate is easy to crack after cold heading molding, and the molding rate is low.
The aluminum content is 0.030 wt% -0.060 wt%, and a small amount of aluminum is added into the carbon steel wire with the carbon content of 0.18 wt% -0.23 wt%, so that crystal grains can be thinned, the plasticity of the wire after spheroidizing annealing is improved, the cold heading forming of a product is facilitated, and the fracture resistance of the final product is improved.
In one embodiment, the carbon steel wire is selected to have a carbon content of 0.18 wt% to 0.23 wt%, a silicon content of 0.10 wt% or less, a manganese content of 0.70 wt% to 1.00 wt%, a phosphorus content of 0.030 wt% or less, a sulfur content of 0.030 wt% or less, and an aluminum content of 0.030 wt% to 0.060 wt%.
In the embodiment of the invention, the phosphorus content of the carbon steel wire rod is less than or equal to 0.030 wt%, and the sulfur content of the carbon steel wire rod is less than or equal to 0.030 wt%. S, P is impurity element, and the content of the impurity element in the carbon steel wire rod is too high to cause product forming crack.
In one embodiment, the grain size of the carbon steel wire is 7-9 grade, the non-metallic inclusion is less than or equal to 1 grade, and the wire does not contain Widmannstatten structure.
In another embodiment, the ovality of the carbon steel wire rod is less than or equal to 0.20 mm.
In step S02, a first drawing process for roughly drawing the wire rod is performed to prepare for a subsequent spheroidizing annealing process, and the wire rod with a uniform structure is obtained. In one embodiment, the total compression ratio is greater than or equal to 50% and the partial compression ratio is less than or equal to 15% during the first drawing process.
Before the first drawing treatment, the carbon steel wire is subjected to acid washing and phosphating in sequence, and the surface of the wire is treated before the drawing treatment, so that a good lubricating effect can be achieved, and the wire has good antirust performance. In one embodiment, the acid washing is performed by using a hydrochloric acid aqueous solution, and the mass concentration of the hydrochloric acid aqueous solution is 10-15%. In another embodiment, the pickling time is 15-20 min.
And 4. phosphating, namely forming a phosphating film on the surface of the wire rod, improving the corrosion resistance of the wire rod, enabling the surface of the wire rod to be more wear-resistant and increasing the drawing lubricity. And phosphating is carried out after acid cleaning, so that the corrosion of the acid liquor to the surface of the wire rod can be prevented, and the surface quality and the quality stability of the wire rod are ensured. In one embodiment, the adopted phosphating solution comprises zinc oxide, phosphoric acid and an accelerant, the accelerant is sodium nitrite, and the thickness of a phosphating film formed after phosphating is 5-8 μm.
In another embodiment, the temperature of the phosphating is 70-80 ℃ and the time is 8-10 minutes.
In yet another embodiment, the total acidity of the phosphating is 20 to 30.
In step S03, the first drawn product is subjected to spheroidizing annealing. The main purpose of spheroidizing annealing is to spheroidize carbide in the microstructure of the steel material, reduce the hardness of the material, improve the plasticity of the material, reduce the deformation resistance of the material and make the material easy to be plastically processed and formed.
In an embodiment of the present invention, the spheroidizing annealing treatment includes: under the protective atmosphere, heating the first drawing product to 730-760 ℃, and preserving heat for 2-4 hours; cooling to 680-690 ℃ at the speed of 10 ℃/h, and preserving heat for 4-6 hours; and naturally cooling to normal temperature.
In the whole spheroidizing annealing process, the key point is the control of the temperature. If the heat preservation temperature is too high or too low, the spheroidized structure is difficult to obtain, and the spheroidization rate is low.
Further, in the spheroidizing annealing process, if oxygen is contained in the reaction system, the wire rod is easy to react with the oxygen at a high temperature to generate decarburization behavior. When the wire rod is decarburized, the decarburized structure is thick, so that the toughness of the wire rod is reduced, the wire rod is easy to crack in the subsequent forming process, the strength and the hardness of the wire rod are reduced, and the use performance requirement of the axis of the copying machine cannot be met. In order to protect the wire rod from decarburization, the spheroidizing annealing treatment of the embodiment of the invention is performed in an oxygen-free environment, for example, an inert protective atmosphere of nitrogen is introduced to drive away oxygen in the reaction system.
In one embodiment, the protective atmosphere is methanol cracking gas when the temperature is above 550 ℃, and the protective atmosphere is nitrogen when the temperature in the furnace is less than 550 ℃. Specifically, before the temperature is increased to 550 ℃, nitrogen is filled into the furnace, a large amount of oxygen is discharged and treated, and when the temperature is increased to 550 ℃, for example, methanol cracking gas is switched by pipeline filling and valve control, so that a trace amount of oxygen in the furnace and the oxygen are subjected to chemical reaction, and finally, the atmosphere in the heat treatment furnace is reduced, and the wire is ensured not to be decarburized.
By adopting the optimized spheroidizing annealing temperature and time and the optimized protective atmosphere condition, the annealing structure of the copier axial wire rod provided by the embodiment of the invention has the advantages of uniform crystal grains, high spheroidizing rate and no abnormal structure.
Through experimental detection, the spheroidization grade of the spheroidization annealing product obtained in the step S03 is 5-6 grade, the grain size reaches 10-12 grade, the grains are uniformly distributed, the spheroidization rate is high, abnormal structures such as coarse grains and Widmannstatten structures are avoided, the tensile strength reaches 450-550 MPa, the elongation at break is 25-30%, and the reduction of area is 75-80%.
In step S04, a second drawing process is performed for finish drawing the wire rod to maintain the mechanical stability and dimensional stability of the product. Specifically, the drawing process employs a die, see fig. 1, with fixed bearing length, working cone angle, and pass of the bearing portion of the die.
In the embodiment of the invention, the length of the bearing belt of the wire-drawing die is preferably 0.4-0.6 times of the diameter of the carbon steel wire. Generally, the length of the sizing belt is increased, so that the friction force and the abrasion degree between the wire rod and the wire-drawing die can be increased, and the smaller the elastic after-effect of the drawn wire rod is, the better the sizing effect is. However, in the embodiment of the present invention, when the length of the constant diameter belt is greater than 0.6 times the diameter of the carbon steel wire, the friction between the wire and the wire-drawing die increases sharply, thereby increasing the abrasion and causing an increase in the drawing force, so that the temperature of the wire increases, the tensile strength and hardness increase, and the work hardening increases; when the length of the bearing belt is less than 0.4 times of the diameter of the carbon steel wire, the dimensional stability of the drawn wire is not enough, and the concentricity of the product cannot be ensured.
In the embodiment of the invention, the working cone angle of the wire-drawing die is preferably 12-14 degrees. The larger the working cone angle of the die is, the larger the drawing force generated during drawing is, the shorter the contact length between the wire and the grinding tool is, the more severe the wire deformation is, the more heat is emitted in unit time during the wire deformation, and finally the higher the temperature of the wire when the wire is taken out of the die is, so that the tensile strength and hardness of the steel wire are increased, and abnormal phenomena such as bending, decentration and the like are easy to occur; when the working cone angle is smaller, the friction force is larger during drawing, the surface hardness is high, and the service life of the die is short. Tests have shown that the working cone angle for the example according to the invention is optimum at 12-14 deg. during the second drawing process.
In an embodiment of the invention, the bearing portions of the die are parallel to each other and are in the shape of a straight cylinder. At present, circular arc-shaped wire-drawing die holes are widely applied in the market, the bearing belts of the circular arc-shaped wire-drawing die holes are slightly angled, and the angle of the bearing belts is slightly different from the multi-surface test result of the wire-drawing die, so that the upper section and the lower section of the bearing belts are not parallel, and in addition, the bearing belts are not obvious with the working cone angle, so that the bearing belts form a small cone shape, and a transition angle also exists. Due to the presence of the "transition angle", the steel wire is compressed a second time in the bearing, increasing the external friction during the two deformations, in fact reducing the bearing length, which factors shorten the service life of the die. The sizing belt parts of the wire-drawing die of the embodiment of the invention are mutually parallel and are in a straight cylinder shape, namely, the wire-drawing die is in a 'linear' wire-drawing die hole shape, the sizing belt is basically straight and in a straight cylinder shape, the sizing belt of the 'linear' die has an obvious annular subarea with a working cone angle, the sizing belt is basically stable, the edge angle of the intersection surface of the sizing belt and the working cone is sharp, and the sizing belt only plays a role in controlling the diameter and does not have secondary compression.
Further, before the second drawing treatment, the spheroidizing annealing product is subjected to acid washing and phosphorization in sequence, an oxide layer on the surface of the wire rod after the spheroidizing annealing treatment is removed through the acid washing, the corrosion resistance of the wire rod is improved through the phosphorization, the surface quality of the product is ensured, and the stability of the product is ensured.
Through the optimized process, on one hand, the copier axial center wire rod provided by the embodiment of the invention has excellent hardenability and good plastic deformation capacity, is suitable for subsequent plastic processing forming, ensures that the product is not cracked during cold heading forming, and has high forming rate. On the other hand, the good linearity and concentricity of the shaft center of the copying machine can be ensured.
The copier axial wire is subjected to plastic processing molding, for example: the high-strength and high-toughness axle center of the copying machine can be obtained by heating treatment and cold heading forming.
In order to make the above details and operations of the present invention clearly understood by those skilled in the art, and to make the progress of the method for manufacturing a core wire for a copier according to the embodiment of the present invention obvious, the following examples illustrate the practice of the present invention.
Example 1
The embodiment provides a method for preparing an axial center wire of a copying machine, which comprises the following steps:
s11, providing a carbon steel wire rod, the composition of the carbon steel wire rod is shown in table 1:
TABLE 1
Content (wt%)
Carbon (C) 0.21
Silicon ≤0.10
Manganese oxide 0.90
Sulfur ≤0.030
Phosphorus (P) ≤0.030
Aluminium 0.030
Through metallographic microscopic examination, the grain size of the carbon steel wire rod is 7-9 grades, the grains are uniformly distributed, abnormal structures such as coarse grains and Widmannstatten structures are avoided, and the ovality of the carbon steel wire rod is less than or equal to 0.20 mm.
S12, sequentially carrying out acid washing and phosphating on the carbon steel wire rod, and then carrying out first drawing treatment to obtain a first drawing product;
during acid washing, a 15% hydrochloric acid aqueous solution is adopted for acid washing for 20 min.
During phosphorization, sodium nitrite is used as an accelerating agent;
the first drawing treatment adopts a wire drawing machine, the total compression ratio is more than or equal to 50 percent, and the partial compression ratio is less than or equal to 15 percent.
S13, performing spheroidizing annealing treatment on the first drawing product to obtain a spheroidizing annealing product; the spheroidizing annealing treatment comprises the following steps: under the protective atmosphere, heating the first drawing product to 745 ℃, and preserving the temperature for 3 hours; then cooling to 685 ℃ at the speed of 10 ℃/hour, and preserving heat for 5 hours; when the temperature is above 550 ℃, the protective atmosphere is methanol cracking gas, and when the temperature in the furnace is less than 550 ℃, the protective atmosphere is nitrogen;
wherein, the flow rate of the nitrogen is 6L/min, and the flow rate of the methanol cracking gas is 4L/min.
S14, sequentially carrying out acid washing and phosphorization on the spheroidized annealing product, and then carrying out second drawing treatment to obtain the spheroidized annealing product;
during acid washing, a hydrochloric acid aqueous solution with the mass concentration of 10% is adopted for acid washing for 15 min.
During phosphorization, sodium nitrite is used as an accelerating agent;
and the second drawing treatment adopts a wire drawing die to carry out drawing treatment, the length of a bearing belt of the wire drawing die is 0.5 times of the diameter of the carbon steel wire, the working cone angle is 13 degrees, and the bearing belt parts of the wire drawing die are mutually parallel and are in a straight cylinder shape.
The wire rod prepared in the embodiment is inspected, the grain size is 10-12 grade, the grains are uniformly distributed, abnormal structures such as coarse grains and Widmannstatten structures are avoided, the elongation at break is 25% -30%, and the reduction of area is 75% -80%. The concentricity of the axis of the copying machine obtained by processing the wire rod is less than or equal to 0.01mm, and the Hardness (HV) of the product reaches 220-250.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. A method for preparing a copier shaft center wire is characterized by comprising the following steps:
providing a carbon steel wire, wherein the carbon content of the carbon steel wire is 0.18-0.23 wt%, the phosphorus content is less than or equal to 0.030 wt%, the sulfur content is less than or equal to 0.030 wt%, and the aluminum content is 0.030-0.060 wt%;
carrying out first drawing treatment on the carbon steel wire to obtain a first drawing product;
carrying out spheroidizing annealing treatment on the first drawing product to obtain a spheroidizing annealing product; the spheroidizing annealing treatment comprises the following steps: under the protective atmosphere, heating the first drawing product to 730-760 ℃, and preserving heat for 2-4 hours; cooling to 680-690 ℃ at the speed of 10-20 ℃/h, and preserving heat for 4-6 hours; then naturally cooling to normal temperature;
performing second drawing treatment on the spheroidized annealed product to obtain the spheroidized annealed product;
and the second drawing treatment adopts a wire drawing die to perform drawing treatment, the length of a sizing belt of the wire drawing die is 0.4-0.6 times of the diameter of the carbon steel wire, the working cone angle is 12-14 degrees, and the sizing belt part of the wire drawing die is in a straight tube shape.
2. The production method according to claim 1, wherein the carbon steel wire rod is subjected to acid pickling and phosphating in this order before the first drawing treatment; and/or
And before the second drawing treatment, sequentially carrying out acid washing and phosphorization on the spheroidized annealing product.
3. The preparation method according to claim 2, wherein the temperature of the phosphating is 70-80 ℃ and the time is 8-10 minutes.
4. The preparation method according to claim 2, wherein the acid washing is performed by using a hydrochloric acid aqueous solution, and the mass concentration of the hydrochloric acid aqueous solution is 10-15%; and/or
The pickling time is 15-20 min.
5. The method according to claim 1, wherein the carbon steel wire has an average grain size of 7 to 9 grades, a non-metallic inclusion content of 1 grade or less, and no Widmannstatten structure.
6. The method of claim 1, wherein the ovality of the carbon steel wire rod is 0.20mm or less.
CN201811634637.0A 2018-12-29 2018-12-29 Preparation method of axis wire of copier Active CN111378814B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102861782A (en) * 2012-10-31 2013-01-09 东莞市科力钢铁线材有限公司 Manufacturing process of screw wires
CN104190705A (en) * 2014-08-04 2014-12-10 南京钢铁股份有限公司 Production technology for bearing steel wire rod
JP2016113637A (en) * 2014-12-11 2016-06-23 株式会社神戸製鋼所 Steel wire for bearing
US20160369370A1 (en) * 2015-06-22 2016-12-22 Hyundai Motor Company Bearing steel having improved fatigue durability and method of manufacturing the same
CN106563701A (en) * 2016-11-11 2017-04-19 重庆方略精控金属制品有限公司 Processing technology of cold drawn wire
CN107881423A (en) * 2017-12-27 2018-04-06 南京宝日钢丝制品有限公司 The method of cold-forging steel and preparation method with preparing steel wire using the cold-forging steel
CN108160741A (en) * 2017-12-28 2018-06-15 东莞科力线材技术有限公司 Press part steel alloy wire rod preparation method, press part and its hardening and tempering process
CN108213095A (en) * 2017-12-28 2018-06-29 东莞科力线材技术有限公司 A kind of fan net counter-bending steel wire of super-strength thin footpath and preparation method thereof
CN108220796A (en) * 2017-12-28 2018-06-29 东莞科力线材技术有限公司 A kind of sports equipment connecting shaft wire rod and preparation method thereof

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102861782A (en) * 2012-10-31 2013-01-09 东莞市科力钢铁线材有限公司 Manufacturing process of screw wires
CN104190705A (en) * 2014-08-04 2014-12-10 南京钢铁股份有限公司 Production technology for bearing steel wire rod
JP2016113637A (en) * 2014-12-11 2016-06-23 株式会社神戸製鋼所 Steel wire for bearing
US20160369370A1 (en) * 2015-06-22 2016-12-22 Hyundai Motor Company Bearing steel having improved fatigue durability and method of manufacturing the same
CN106563701A (en) * 2016-11-11 2017-04-19 重庆方略精控金属制品有限公司 Processing technology of cold drawn wire
CN107881423A (en) * 2017-12-27 2018-04-06 南京宝日钢丝制品有限公司 The method of cold-forging steel and preparation method with preparing steel wire using the cold-forging steel
CN108160741A (en) * 2017-12-28 2018-06-15 东莞科力线材技术有限公司 Press part steel alloy wire rod preparation method, press part and its hardening and tempering process
CN108213095A (en) * 2017-12-28 2018-06-29 东莞科力线材技术有限公司 A kind of fan net counter-bending steel wire of super-strength thin footpath and preparation method thereof
CN108220796A (en) * 2017-12-28 2018-06-29 东莞科力线材技术有限公司 A kind of sports equipment connecting shaft wire rod and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘莹莹: "《金属挤压、拉拔工艺及工模具设计》", 30 November 2018, 冶金工业出版社 *

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