CN108555040A - A kind of toy axle accurate circular arc quadrangle steel wire and preparation method thereof - Google Patents

A kind of toy axle accurate circular arc quadrangle steel wire and preparation method thereof Download PDF

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Publication number
CN108555040A
CN108555040A CN201711460071.XA CN201711460071A CN108555040A CN 108555040 A CN108555040 A CN 108555040A CN 201711460071 A CN201711460071 A CN 201711460071A CN 108555040 A CN108555040 A CN 108555040A
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China
Prior art keywords
wire
quadrangle
circular arc
steel wire
preparation
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CN201711460071.XA
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Chinese (zh)
Inventor
罗安武
王斯华
刘晓祥
郝小龙
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Dongguan Keli Wire Technology Co Ltd
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Dongguan Keli Wire Technology Co Ltd
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Priority to CN201711460071.XA priority Critical patent/CN108555040A/en
Publication of CN108555040A publication Critical patent/CN108555040A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • 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
    • C23C22/07Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates

Abstract

The present invention relates to a kind of toy axle accurate circular arc quadrangle steel wires and preparation method thereof.Toy axle material of the accurate circular arc quadrangle steel wire using mild steel Q195 as line base, C content is 0.08~0.12wt%, S contents≤0.025wt%, P content≤0.025wt% in mild steel Q195.Preparation method includes the following steps:After line base pickling, phosphorating treatment is carried out;After the primary drawing of multi-pass, single pass drawing is carried out with quadrangle wire-drawing die, total draught >=60% of the primary drawing, compression ratio≤10% between the neighboring track time of the primary drawing, compression ratio≤10% of the single pass drawing;It is heat-treated in protective atmosphere;Alramenting again carries out precision drawing, compression ratio≤10% with quadrangle wire-drawing die.Above-mentioned quadrangle wire-drawing die working cone angle is 14~16 °, sizing strip length is 3~5mm, die corner≤0.1mm.Products obtained therefrom quality is high, is easy to plastic processing forming.

Description

A kind of toy axle accurate circular arc quadrangle steel wire and preparation method thereof
Technical field
The present invention relates to metal processing sectors more particularly to a kind of toy axle accurate circular arc quadrangle steel wire and its preparations Method.
Background technology
Accurate quadrangle section material, that is, quadrangle steel wire, is widely used because of its high-precision, low cost, excellent in mechanical performance In all kinds of toy axles, toy axle as toy car core component, with the fast development of toy car industry demand by Step increases, wide market.Quadrangle steel wire traditional forming methods are die drawing method, i.e., with being processed into certain geometrical shape in advance Sintered carbide die, by round steel wire by passage drawing, until required size, shape are drawn into, the disadvantage is that molding difficulty is big, wedge angle Charge less is full, surface easily scratches, wire drawing die serious wear, small round corner rectangular wire are difficult batch production.Four angle steel of China's production Silk also has obvious gap, quality to cannot be satisfied customer demand, and or production compared with same kind of products at abroad in quality Quality is good, has reached customer demand, but production cost is higher by several times than the quadrangle steel wire cost of foreign countries' production, leads to China It every year all need to be from the quadrangle steel wire of a large amount of high quality of external import.Therefore, the quadrangle steel wire for how producing super quality and competitive price, carries The market competitiveness of high China quadrangle steel wire reduces the dependence to external high quality steel wire, is put in Production for Steel Wire enterprise of China A key subjects in front.By the promotion of selection and material plasticity deformation technology to quadrangle wire-drawing die, can create Good economic benefit occupies more market shares, provides more good product for market, reduces to external high quality quadrangle The dependence of steel wire.
Invention content
It is difficult batch production, technical problem of low quality for prior art quadrangle steel wire, the present invention provides a kind of object for appreciation Has axle accurate circular arc quadrangle steel wire and preparation method thereof.
And the present invention also provides a kind of above-mentioned toy axle preparation methods of accurate circular arc quadrangle steel wire.
To achieve the above object of the invention, the embodiment of the present invention uses following technical solution:
A kind of toy axle accurate circular arc quadrangle steel wire, using mild steel Q195 as the material of line base, the mild steel C content is 0.08~0.12wt%, S contents≤0.025wt%, P content≤0.025wt% in Q195.
The present invention strictly controls the screening of line base, selects the material using mild steel Q195 as line base, intensity With hardness is relatively low, plasticity and toughness are preferable, there are good pressure machining characteristics, be easy to receive various processing as forged, to C, S, P content strictly controls, and to ensure that line blank material matter has good plasticity and elasticity, is allowed to meet the needs of production, from And realize batch production.
And the embodiment of the present invention additionally provides the preparation method of above-mentioned toy axle accurate circular arc quadrangle steel wire, packet Include following steps:
Step a, by after line base pickling, phosphorating treatment is carried out;
With working cone angle it is 14~16 °, fixed after step b, primary drawing that line base after phosphorating treatment is carried out to multi-pass Diameter strip length is 3~5mm, the quadrangle wire-drawing die of die corner≤0.1mm carries out single pass drawing, wherein the first drawing Total draught >=60% pulled out, compression ratio≤10% between the neighboring track of the primary drawing time, the single pass drawing Compression ratio≤10%;
Step c, in protective atmosphere, hot place will be carried out with the wire rod obtained after the wire-drawing die single pass drawing process of quadrangle Reason;
Step d, after the wire rod after heat treatment obtained being carried out pickling, phosphorating treatment again is carried out;
Step e, be 14~16 ° with working cone angle by the wire rod obtained after phosphorating treatment again, sizing strip length be 3~ The quadrangle wire-drawing die progress precision drawing of 5mm, die corner≤0.1mm, wherein the compression ratio of the precision drawing≤ 10%.
The quadrangle wire-drawing die that the present invention uses optimizes working cone angle, sizing length and fillet size, makes gained wire rod With more preferably tensile strength and sizing effect, make product that there is smaller circular arc chamfering, and to the diameter of drawing wires, flat The technic indexs such as straight degree and surface quality have carried out good control, and production cost is lower.Primary drawing is using higher total Compression ratio makes metal inside crystal grain constantly generate sliding, and then keeps lattice generation dislocation twisted to prevent its redeformation, to increase The plastic deformation resistance for adding steel wire increases the tensile strength of steel wire.The aggravation of material surface processing hardening can make in drawing process The toughness bending and twisting values of steel wire deteriorate, or even form the extremely low fragile material of bending property, so the present invention is in adjacent passage Between use smaller compression ratio (i.e. partial shrinkage rate), the toughness to ensure product is good.The optimization of heat treatment process parameter, Product hardness is set to reduce, plasticity improves, resistance of deformation reduces, it is easier to which plastic processing shapes, to obtain ideal high quality Quadrangle steel wire.The present invention makes line by the parameter of complex optimum quadrangle steel wire drawing die, drawing process and heat treatment process Material has enough materials to be full of wedge angle position during the drawing process, avoids the occurrence of and wedges angle on one side while fillet, improves product size Stability.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with specific embodiment, to this Invention is further elaborated.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, not For limiting the present invention.
An embodiment of the present invention provides a kind of toy axle accurate circular arc quadrangle steel wires, using mild steel Q195 as line base Material, C content is 0.08~0.12wt% in the mild steel Q195, S contents≤0.025wt%, P content≤ 0.025wt%.
Mild steel Q195 has lower intensity and hardness and good plasticity and toughness, and pressure machining characteristics are preferable, It is easy to receive various processing, also there is good weldability.It uses using mild steel Q195 as the line base of material, is more easy to produce in batches Go out high-intensity fine wire-diameter steel, and is applied to multiple fields.
Specifically, C content is 0.08~0.12wt% in the mild steel Q195, the content of C directly affects the performance of steel, When C content is high, the hardness and strength of steel increase, but fusing point, plasticity and ductility reduction, make steel be difficult to process, but C content mistake When low, products obtained therefrom case hardness is not good enough, and wearability and antifatigue degree decline;S contents≤0.025wt%, S can make steel in steel Hot-short phenomenon is generated, reduces the mechanical performance of steel, and unfavorable to the corrosion resistance and solderability of steel;P content≤0.025wt%, Phosphorus can be such that the plasticity of steel and toughness is decreased obviously, and steel is made to have cold brittleness.If S, P is exceeded, line base brittleness increases, and is unfavorable for For following process at thin footpath steel wire, gained finished product is also difficult to have high intensity.Therefore, the present invention is tight to middle C, S, the P content of material Lattice control, to ensure that line base has higher plastic deformation ability.High, satisfactory mechanical property the material using plasticity, it is easier to It meets the needs of production, batch production is made to be achieved.
It is further preferred that a diameter of 6.5~10.0mm of the line base, the line base of the diameter and the present invention be quasi- to be obtained Product size is adapted, and line base can be made to have higher total draught in drawing process, to improve the quality of finished product.
And the embodiment of the present invention additionally provides the preparation method of above-mentioned toy axle accurate circular arc quadrangle steel wire, packet Include following steps:
Step a, by after line base pickling, phosphorating treatment is carried out;
With working cone angle it is 14~16 °, fixed after step b, primary drawing that line base after phosphorating treatment is carried out to multi-pass Diameter strip length is 3~5mm, the quadrangle wire-drawing die of die corner≤0.1mm carries out single pass drawing, wherein the first drawing Total draught >=60% pulled out, compression ratio≤10% between the neighboring track of the primary drawing time, the single pass drawing Compression ratio≤10%;
Step c, in protective atmosphere, hot place will be carried out with the wire rod obtained after the wire-drawing die single pass drawing process of quadrangle Reason;
Step d, after the wire rod after heat treatment obtained being carried out pickling, phosphorating treatment again is carried out;
Step e, be 14~16 ° with working cone angle by the wire rod obtained after phosphorating treatment again, sizing strip length be 3~ The quadrangle wire-drawing die progress precision drawing of 5mm, die corner≤0.1mm, wherein the compression ratio of the precision drawing≤ 10%.
Step a and step d of the present invention form fine and close phosphating coat in wire surface by alramenting technique, from And plays the role of antirust and increase follow-up drawing lubrication degree.The quadrangle wire drawing die used in the step b and step e The working cone angle of tool is 14~16 °:The the working cone angle of mold the big, and the pulling capacity that whens drawing wires generates is also bigger, wire rod Shorter with the contact length of mold, deformation is more violent, and the heat released in the unit interval when wire rod deformation is also more, finally Cause temperature when wire rod depanning higher, wire rod tensile strength, hardness is caused to increase and be bent and the reduction of torsion value;Working cone angle It is too small that inlet wire contact point can be caused close to Drawing cone upper end, make deformed area is opposite to lengthen, so that wire-drawing equipment is generated wire rod residual Complementary work increases, and generates big calorimetric, increases wire-drawing equipment power consumption, increases production cost.The sizing belt length of the quadrangle wire-drawing die Degree is 3~5mm:Sizing extension can make wire rod have enough materials to be full of corners in the drawing process of the small compression ratio of multi-pass Position, calibrating strap is long to make the frictional force of wire rod and mold and the elasticity of abrasion increase, wire rod restore to eliminate the energy of elastic after effect Power increases, and the elastic after effect after wire drawing is smaller, and sizing effect just can be better, and in addition wire rod increases with mold friction Can also pulling capacity be caused to increase, and wire temperature is made to increase, tensile strength is caused to be increased with hardness, face bending and twisting values reduce; And calibrating strap is too short then cannot carry out good control to technic indexs such as the diameter of drawing wires, glacing flatness and surface quality. Fillet≤0.1mm of the quadrangle wire-drawing die:The selection of fillet size determines the chamfering of product, to ensure product for playing Have axle and other items it is upper when it is non-slip in rotary course, product chamfering is big if fillet is too big, and when rotation easily skids.The step The primary drawing of rapid b uses the total draught not less than 60%, i.e., terminates the cold deformation of products obtained therefrom from line base to primary drawing Amount, total draught is big, and the deflection generated is bigger, and the interior tissue of wire rod is broken by the drawing-down of machinery, drawing, generates stress value It is higher, more energy are provided for subsequent heat treatment, so that Oxygen potential and plasticity is improved, and the intensity of gained steel wire improves.Wire rod Internal grain constantly generates sliding during the drawing process, as to generate dislocation twisted and prevent it again for the reduction of slip system and lattice Deformation makes wire rod plastic deformation resistance increase.Wire surface will produce the case where processing hardening in drawing process, processing hardening Aggravation can cause the rupture pull force of wire rod to increase, i.e., the tensile strength of wire rod increases, but the aggravation of processing hardening can make wire rod Toughness bending and twisting values deteriorate, or even form the extremely low fragile material of bending property, so primary drawing is increasing total draught While improving wire strength, to reduce the compression ratio between neighboring track time, i.e. partial shrinkage rate.Partial shrinkage rate≤ 10%, compression ratio≤10% that the precision drawing of compression ratio≤10% of single pass drawing, step e uses, can reduce wire rod Brittleness, the toughness to ensure product is good, at the same time it can also enable in process special-shaped line preferably be full of corners Position, makes product chamfer dimesion become smaller as far as possible, while ensuring that the quadrangle steel wire finished product quadrangle pulled out is consistent, avoids the occurrence of and justifies on one side The case where angle one side wedge angle, improves product size stability, and makes in process wire surface work-hardening capacity significantly The defects of reducing, reducing product surface micro-crack, point, stability of enhancing product performance, while making material surface and core Performance is consistent.The step c makes stratiform inside steel material or net carbide cohesion become spherical particle by heat treatment, Dispersed precipitate improves the cutting ability and working plasticity of steel on ferrite matrix;The present invention passes through four angle steel of complex optimum The parameter of silk wire-drawing die, drawing process, heat treatment process, making wire rod during the drawing process has enough materials to be full of corners Position is avoided the occurrence of on one side wedge angle while fillet the case where, so that hardness is reduced, plasticity improves, resistance of deformation reduces, to be managed The quadrangle steel wire for the high quality thought.
Specifically, pickling described in the step a and/or step d is to be carried out clearly with the mixed acid of hydrochloric acid and oxalic acid It washes.Oxalic acid is a kind of organic acid, and effective hydrogen concentration is higher, after mixed in hydrochloric acid, can quickly be reacted with the oxide of wire surface, The oxide of wire surface is removed, and one layer of fine and closely woven small pore is formed in wire surface, after this layer of small pore increases The contact area of continuous phosphate solution and wire surface plays antirust to quickly obtain fine and close phosphating coat in wire surface And increase the effect of follow-up drawing lubrication degree.
The endoporus of quadrangle wire-drawing die described in the step b is the square of 2.1~5.5mm × 2.1~5.5mm.It should Hole size and shape can make production obtained by follow-up precision drawing under conditions of the compression ratio between ensureing adjacent passage≤10% Product meet the needs of application.
Wire rod is warming up to 20~30 DEG C of austenite transformation temperature or more, heat preservation 4~6 by the step c in protective atmosphere Hour, then 20~30 DEG C of austenite transformation temperature or less is cooled to the speed of 8~12 DEG C/h, cooling velocity directly affects carbon The size and uniformity of compound particle, cooling is too fast, and carbide particle is too thin, and the possibility of tangible slabbing carbide, makes hard Spend it is higher, when cooled slow carbide particle again it is excessively coarse.Heat preservation 3~4 hours, makes structural transformation complete, and obtains in iron element Equally distributed spherical or granular carbide tissue on body matrix;It cools to the furnace and comes out of the stove again.
It is further preferred that the cooling rate is 10 DEG C/h, which makes being of moderate size of carbide particle, grain Diameter is evenly distributed, and will not form flaky carbide.
It is further preferred that the protective atmosphere is methanol atmosphere, the wire rod to ensure heat treatment not by decarburization, obtain compared with Good plasticity.
It is further preferred that the throughput of the methanol is 1.5~2.5L/min, which may insure be heat-treated Stable methanol atmosphere is maintained in operating space.
The endoporus of quadrangle wire-drawing die described in the step e is the square of 2.0~5.3mm × 2.0~5.3mm.It should Hole size and shape can meet the needs of application.
In order to better illustrate embodiment of the present invention, illustrated below by embodiment is further.
Embodiment 1
Present embodiments provide a kind of toy axle accurate circular arc quadrangle steel wire and preparation method thereof.
Using mild steel Q195 as the material of line base, wherein C content is 0.08wt%, and S contents are 0.012wt%, P content For 0.021wt%, line footpath 8.0mm, austenite transformation temperature is 700 DEG C.
Preparation method includes the following steps:
After step a, mixed acid cleaning that line base is first passed through to hydrochloric acid and oxalic acid, 85 DEG C of 9wt% phosphate solutions are immersed In 10 minutes carry out phosphorating treatment;
Step b, the line base after phosphorating treatment is subjected to 15 primary drawings, total draught 71.78%, partial shrinkage rate It is 8.09%, with working cone angle be 14 °, sizing strip length is 5mm, die corner 0.1mm, endoporus are 3.65mm × 3.65mm Square quadrangle wire-drawing die carry out single pass drawing, compression ratio 6.04%;
It step c, will be with being obtained after the wire-drawing die single pass drawing process of quadrangle in the methanol atmosphere that flow is 2L/min Wire rod be warming up to 720 DEG C, keep the temperature 4 hours, then 680 DEG C are cooled to the speed of 10 DEG C/h, keep the temperature 3 hours, then furnace cooling To coming out of the stove;
Step d, the wire rod after heat treatment obtained is immersed 85 DEG C after the cleaning of the mixed acid of persalt and oxalic acid Carry out phosphorating treatment within 10 minutes in 9wt% phosphate solutions;
Step e, by the wire rod obtained after phosphorating treatment again be 14 ° with working cone angle, sizing strip length is 5mm, mold Fillet is 0.1mm, endoporus is 3.5mm × 3.5mm square quadrangle wire-drawing die carries out drawing, makes the partial shrinkage rate be 8.05%.
Embodiment 2
Present embodiments provide a kind of toy axle accurate circular arc quadrangle steel wire and preparation method thereof.
Using mild steel Q195 as base material, wherein C content is 0.11wt%, and S contents are 0.018wt%, and P content is 0.016wt%, line footpath 10.0mm, austenite transformation temperature are 710 DEG C.
Preparation method includes the following steps:
After step a, mixed acid cleaning that line base is first passed through to hydrochloric acid and oxalic acid, 78 DEG C of 10wt% phosphate solutions are immersed In 15 minutes carry out phosphorating treatment;
Step b, the line base after phosphorating treatment is subjected to 9 primary drawings, total draught 60.31%, partial shrinkage rate It is 9.76%, with working cone angle be 15 °, sizing strip length is 4mm, die corner 0.08mm, endoporus are 5.5mm × 5.5mm Square wire-drawing die carry out single pass drawing, compression ratio 2.91%;
It step c, will be with being obtained after the wire-drawing die single pass drawing process of quadrangle in the methanol atmosphere that flow is 2L/min Wire rod be warming up to 725 DEG C, keep the temperature 5 hours, then 675 DEG C are cooled to the speed of 10 DEG C/h, keep the temperature 3 hours, then furnace cooling To coming out of the stove.
Step d, the wire rod after heat treatment obtained is immersed 78 DEG C after the cleaning of the mixed acid of persalt and oxalic acid Carry out phosphorating treatment within 15 minutes in 10wt% phosphate solutions;
Step e, by the wire rod obtained after phosphorating treatment again be 15 ° with working cone angle, sizing strip length is 4mm, mold Fillet is 0.08mm, endoporus is 5.3mm × 5.3mm square quadrangle wire-drawing die carries out drawing, makes the partial shrinkage rate be 7.14%.
Embodiment 3
Present embodiments provide a kind of toy axle accurate circular arc quadrangle steel wire and preparation method thereof.
Using mild steel Q195 as base material, wherein C content is 0.12wt%, and S contents are 0.020wt%, and P content is 0.018wt%, line footpath 6.5mm, austenite transformation temperature are 700 DEG C
Preparation method includes the following steps:
After step a, mixed acid cleaning that line base is first passed through to hydrochloric acid and oxalic acid, 80 DEG C of 8wt% phosphate solutions are immersed In 12 minutes carry out phosphorating treatment;
Step b, the line base after phosphorating treatment is subjected to 20 primary drawings, total draught 85.79%, partial shrinkage rate It is 9.29%, with working cone angle be 16 °, sizing strip length is 3mm, die corner 0.06mm, endoporus are 2.1mm × 2.1mm Wire-drawing die carry out single pass drawing, compression ratio 6.41%;
It step c, will be with being obtained after the wire-drawing die single pass drawing process of quadrangle in the methanol atmosphere that flow is 2L/min Wire rod be warming up to 730 DEG C, keep the temperature 6 hours, then 670 DEG C are cooled to the speed of 10 DEG C/h, keep the temperature 4 hours, then furnace cooling To coming out of the stove.
Step d, the wire rod after heat treatment obtained is immersed 80 DEG C after the cleaning of the mixed acid of persalt and oxalic acid Carry out phosphorating treatment within 12 minutes in 8wt% phosphate solutions;
Step e, by the wire rod obtained after phosphorating treatment again be 16 ° with working cone angle, sizing strip length is 3mm, mold Fillet is 0.06mm, endoporus is 2.0mm × 2.0mm square quadrangle wire-drawing die carries out drawing, makes the partial shrinkage rate be 9.30%.
Quality inspection is carried out with accurate circular arc quadrangle steel wire to toy axle obtained by Examples 1 to 3, the results are shown in Table 1.
The quality test results of the accurate circular arc quadrangle steel wire of toy axle obtained by 1 Examples 1 to 3 of table
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention Any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.

Claims (10)

1. a kind of toy axle accurate circular arc quadrangle steel wire, which is characterized in that using mild steel Q195 as the material of line base, institute It is 0.08~0.12wt%, S contents≤0.025wt%, P content≤0.025wt% to state C content in mild steel Q195.
2. toy axle according to claim 1 accurate circular arc quadrangle steel wire, which is characterized in that the diameter of the line base For 6.5~10.0mm.
3. a kind of any one of claim 1-2 toy axles preparation method of accurate circular arc quadrangle steel wire, feature exist In including the following steps:
Step a, by after line base pickling, phosphorating treatment is carried out;
It is 14~16 °, calibrating strap with working cone angle after step b, primary drawing that line base after phosphorating treatment is carried out to multi-pass Length is 3~5mm, the quadrangle wire-drawing die of die corner≤0.1mm carries out single pass drawing, wherein the primary drawing Total draught >=60%, compression ratio≤10% between the neighboring track of the primary drawing time, the compression of the single pass drawing Rate≤10%;
Step c, it in protective atmosphere, will be heat-treated with the wire rod obtained after the wire-drawing die single pass drawing process of quadrangle;
Step d, after the wire rod after heat treatment obtained being carried out pickling, phosphorating treatment again is carried out;
Step e, by the wire rod obtained after phosphorating treatment again be 14~16 ° with working cone angle, sizing strip length is 3~5mm, mould The quadrangle wire-drawing die for having fillet≤0.1mm carries out precision drawing, wherein compression ratio≤10% of the precision drawing.
4. the toy axle according to claim 3 preparation method of accurate circular arc quadrangle steel wire, which is characterized in that described Pickling described in the step a and/or step d is to be cleaned with the mixed acid of hydrochloric acid and oxalic acid.
5. the toy axle according to claim 3 preparation method of accurate circular arc quadrangle steel wire, which is characterized in that described Heat treatment described in step c specifically includes following steps:The wire rod obtained after primary drawing is handled is warming up to austenite to turn More than temperature 20~30 DEG C, keep the temperature 4~6 hours, then with the cooling rate of 8~12 DEG C/h be cooled to austenite transformation temperature with It is 20~30 DEG C lower, 3~4 hours are kept the temperature, then cool to the furnace and come out of the stove.
6. the toy axle according to claim 5 preparation method of accurate circular arc quadrangle steel wire, which is characterized in that described Cooling rate described in step c is 10 DEG C/h.
7. the toy axle according to claim 3 preparation method of accurate circular arc quadrangle steel wire, which is characterized in that described The endoporus of quadrangle wire-drawing die described in step b is the square of 2.1~5.5mm × 2.1~5.5mm.
8. the toy axle according to claim 3 preparation method of accurate circular arc quadrangle steel wire, which is characterized in that described The endoporus of quadrangle wire-drawing die described in step e is the square of 2.0~5.3mm × 2.0~5.3mm.
9. the toy axle according to claim 3 preparation method of accurate circular arc quadrangle steel wire, which is characterized in that described Protective atmosphere described in step c is methanol atmosphere.
10. the toy axle according to claim 9 preparation method of accurate circular arc quadrangle steel wire, which is characterized in that institute The throughput for stating methanol is 1.5~2.5L/min.
CN201711460071.XA 2017-12-28 2017-12-28 A kind of toy axle accurate circular arc quadrangle steel wire and preparation method thereof Pending CN108555040A (en)

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CN111375649A (en) * 2018-12-29 2020-07-07 东莞科力线材技术有限公司 Preparation method of automobile fastener wire
CN111482476A (en) * 2019-01-25 2020-08-04 江阴祥瑞不锈钢精线有限公司 Stainless steel wire drawing method

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CN111375649A (en) * 2018-12-29 2020-07-07 东莞科力线材技术有限公司 Preparation method of automobile fastener wire
CN111482476A (en) * 2019-01-25 2020-08-04 江阴祥瑞不锈钢精线有限公司 Stainless steel wire drawing method

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Application publication date: 20180921