CN106244934B - A kind of hinge - Google Patents
A kind of hinge Download PDFInfo
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- CN106244934B CN106244934B CN201610717021.4A CN201610717021A CN106244934B CN 106244934 B CN106244934 B CN 106244934B CN 201610717021 A CN201610717021 A CN 201610717021A CN 106244934 B CN106244934 B CN 106244934B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0087—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for chains, for chain links
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
- C23C22/42—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also phosphates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/53—Treatment of zinc or alloys based thereon
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/18—Electroplating using modulated, pulsed or reversing current
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Abstract
The present invention relates to a kind of hinge, belong to technical field of alloy material.Described hinge is made up of steel alloy, the component and its mass percent of the steel alloy are C0.10 0.15%, Cr1.4 1.6%, Si0.14 0.20%, Mn0.8 1.15%, Al0.03 0.05%, N0.008 0.015%, Ti0.12 0.22%, S0.005 0.022%, V0.08 0.15%, Nb0.03 0.12%, P≤0.015%, surplus is Fe and inevitable impurity, and is process through raw material refinery, subzero treatment, plating, passivation, Seal treatment.The corrosion resistance and better mechanical property of hinge of the present invention.
Description
Technical field
The present invention relates to a kind of hinge, belong to technical field of alloy material.
Background technology
Steel is applied to the various aspects in industrial production and life, has in the live and work of the mankind particularly significant
Effect, be development in science and technology basis, but steel easy-to-rust and tarnishing processes are considerably complicated in an atmosphere, to industrial production and people
Life produce different degrees of adverse effect, bring unnecessary economic loss.In China, according to Chinese industrial and natural ring
Border Investigation On Corrosion project team investigation result in 2008 shows that direct economic loss passes through indirectly up to 230,000,000,000 yuan as caused by corrosion
Ji loss is 5000~600,000,000,000 yuan, equivalent to the 5% of China's gross national product then.Therefore, research prevents steel corrosion
Method just become critically important.
Hinge is also known as hinge and is for connection to two solids and allows to make the mechanical device relatively rotated between the two.Hinge
It can be made up of moveable component, or be made up of folding material.Hinge of the prior art typically uses common alloy
Steel is made up of common moulding process, and its performance is more general, and especially intensity and corrosion resistance is relatively low.
The content of the invention
It is an object of the invention to provide a kind of high performance hinge, while there is high corrosion resistance and mechanical performance.
The purpose of the present invention can be realized by following technical proposal：A kind of hinge, described hinge are made up of steel alloy,
The component and its mass percent of the steel alloy be：C：0.10-0.15%, Cr：1.4-1.6%, Si：0.14-
0.20%th, Mn：0.8-1.15%, Al：0.03-0.05%, N：0.008-0.015%, Ti：0.12-0.22%, S：0.005-
0.022%th, V：0.08-0.15%, Nb：0.03-0.12%, P≤0.015%, surplus is Fe and inevitable impurity.
Carbon content is reduced in the steel alloy of hinge of the present invention, improves chromium content, passes through caused association between each element
Same-action improves the combination property of hinge.If carbon content is too low in the steel alloy of hinge of the present invention, at the deep cooling of work in-process
Comprehend and have a strong impact on intensity and hardness, if carbon content is too high, plasticity is low, can also influence the property in follow-up shaping and electroplating process
Can, cause problems of crack." the black cellular microstructure " defect, hinge of the present invention are formed in order to avoid internal oxidition occurs in infiltration layer
The control of Si content requirements is below 0.20% in steel alloy.The intensity of hinge can be improved when adding 0.14-0.20%Si, if Si
Content is less than 0.14%, then can influence the yield strength of hinge.Although Mn is solution strengthening element, in hinge alloy of the present invention
In steel, if manganese content is more than 1.15%, the plasticity and toughness of hinge can be greatly lowered.Chromium can produce association with carbon
Same-action, a variety of carbide are formed, with the increase of chromium content, the quantity of carbide is also constantly increasing.In hinge
The middle chromium for adding high content, can not only change carbide dispersion distributional pattern in hinge, obtain with Cr23C6And Cr7C3Based on
Carbide, make its Dispersed precipitate on Ovshinsky matrix, moreover it is possible to improve the wearability, hardness, intensity of hinge.And chromium
Add the antioxygenic property of the quenching degree that can improve steel and steel.The chromium of high content can in hinge steel alloy of the present invention
Make steel that there is good high-temperature oxidation resistant and oxidative resistance dielectric corrosion.These be all general low chromium content alloy without
What method was realized.But when the content of chromium is more than 1.6%, the toughness and plasticity that can cause hinge reduce.Hinges of the Ti in hinge
The strength and toughness of steel can be improved in chain, particularly can together with aluminium fixed nitrogen, eliminate danger caused by unnecessary nitrogen in steel
Evil.Aluminium is most basic, maximally effective crystal grain thinning element, is mainly existed in steel in the form of AlN.AlN is distributed mainly on crystal boundary,
Playing a part of pinning crystal boundary prevents crystal grain from growing up.When aluminium content is higher in steel alloy, but nitrogen content is relatively low, then can not be formed
Enough AlN make it uniformly be distributed in austenite grain boundary.It is brilliant that AlN negligible amounts necessarily cause it to be distributed more position pinning
Boundary's effect is obvious, and less position is then unable to pinning crystal boundary and prevents growing up for austenite crystal, and this is also to produce mixed crystal, i.e. crystal grain
The main reason for local anomaly is grown up.Find that aluminium content is 0.03-0.05% in hinge steel alloy of the present invention through constantly experiment
When, control Al/N >=3 can ensure that mixed crystal phenomenon does not occur when in follow-up heat treatment.Added in hinge steel alloy of the present invention
0.08-0.15%V thinning microstructure crystal grain, improve intensity and toughness.Vanadium is not only to strengthen compound formation element, or steel are excellent
Deoxidier, can and carbon combination, form high-melting-point, high rigidity, high diffusive degree and stable VC carbide, and 0.12-
0.22%Ti, 0.08-0.15%V and 0.8-1.15%Mn play synergy, the common intensity and hardness for improving steel, and its reason exists
Particle is separated out with the use of the Dispersed precipitate that with crystal grain thinning, can also not only obtain more high-volume fractional in Ti, V and Mn,
Play a part of refined crystalline strengthening and dispersion-strengtherning simultaneously, the intensity, toughness and resistance to corrosion of hinge can also be improved.Nb can
Crystal grain thinning, as above matched with other components, beneficial effect between each element and its element while maximumlly can be made
Bring into play, increase substantially intensity, hardness, corrosion resistance, the wearability of steel alloy, at the same reduce steel superheated susceptivity and
Temper brittleness.In in general steel alloy, the nonmetal inclusion of the impurity element such as sulphur, phosphorus can destroy the matrix continuity of steel, quiet
In the presence of load and dynamic loading, often as the starting point of crackle, the performance of steel alloy is influenceed, but the present invention is in order to improve hinge
Chain machinability is, it is necessary to add certain sulfur content.
Preferably, the component and its mass percent of the steel alloy are：C：0.12-0.15%, Cr：1.4-
1.5%th, Si：0.15-0.18%, Mn：0.9-1.10%, Al：0.032-0.045%, N：0.01-0.012%, Ti：0.15-
0.20%th, S：0.008-0.02%, V：0.10-0.12%, Nb：0.05-0.10%, P≤0.015%, surplus is Fe and can not
The impurity avoided.
The present invention also provides a kind of processing technology of hinge, and described processing technology comprises the following steps：
The component of steel alloy and mass percent dispensing as used in hinge, raw material is smelted into molten steel, molten steel is through true
Sky is smelted, poured into a mould, being rolled into steel plate, and by steel plate machine-shaping, obtains hinge component blank；
By hinge component blank at -138~-170 DEG C subzero treatment 1-1.5h, then at 230-250 DEG C at lonneal
120-145min is managed, obtains hinge semi-finished product；
Hinge semi-finished product are handled into 50-120min in 20-30 DEG C of electroplate liquid, passivated processing, Seal treatment must be cut with scissors
Chain finished product.
The present invention first uses subzero treatment, makes retained austenite promote martensitic twin to refine and analyse to martensite transfor mation
Excess of export fine carbide, improve material hardness and wearability.Hardness without the steel alloy after subzero treatment on its surface is relatively low,
Easily there is bowing phenomena, and the steel alloy after subzero treatment, original more retained austenite is at deep cooling in top layer
Continue, to martensite transfor mation, to increase effective case depth, improve case hardness, the hardness of product subsurface can improve in reason
25-40% or so, it is thus eliminated that scene of bowing.Martensite and retained austenite are unstable phases, are had spontaneously to iron element
The trend of body+cementite structural transformation.The present invention forms rich carbon atom through lonneal, carbon atom segregation again after subzero treatment
Group, martensite start to decompose, and the supersaturated concentration of carbon dissolved in martensite declines, and square degree is reduced, and has Carbide Precipitation shape
Into tempered martensite.When being tempered for 230-250 DEG C, transformation generation tempered martensite also occurs for retained austenite, further improves
The case hardness and wearability of hinge.
In addition, use vacuum metling in raw material steel-making of the present invention.Oxygen content and non-metallic inclusion in steel alloy, especially
It is oxide, the fatigue life of hinge steel alloy is sufficiently reflected, therefore, the present invention uses vacuum metling, improves
The degree of purity of steel alloy, and then the contact fatigue property of hinge is improved, improve its service life.By vacuum metling oxygen content from
28mg/kg is reduced to 16mg/kg, and oxide aggregate is reduced to 44.8mg/kg, connecing when survival rate is 50% from 64.9mg/kg
Tactile fatigue life improves 29%, and contact fatigue life improves 20% when survival rate is 95%.
In the processing technology of above-mentioned hinge, the heating rate after subzero treatment is 3-5 DEG C/min.I.e. after subzero treatment,
230-250 DEG C of progress temper is warming up to 3-5 DEG C/min speed.
In the processing technology of above-mentioned hinge, the composition of electroplate liquid is：Zinc ion 15-25g/L, nickel ion 1.8-2.8g/
L, sodium hydroxide 150-200g/L, TEPA 10-15g/L, aziridine 8-15ml/L, citric acid 5-6g/L, tartaric acid
Potassium sodium 15-20g/L.
Why zinc-nickel alloy coating has excellent corrosion resistance to be because the stable potential of alloy layer is between zinc and matrix
Between (steel), less potential difference causes corrosion of coating slower.The corrosion product of zinc-nickel alloy is mainly ZnCl2·4Zn
(oH)2.The corrosion product is uniform, is densely covered in coating surface, and easy conductive, does not there is good protective effect；And zinc coating
Corrosion product be mainly ZnO, short texture, do not have protective effect.In addition, in electroplating zinc-nickel alloy layer of the present invention, zinc-
Nickel alloy belongs to y phases (intermetallic compound), has highest thermodynamic stability, thus corrosion resistance is preferable；And zinc coating is
Phase structure (close hexagonal crystal system) is kowtowed, thermodynamic stability is poor.The present invention passes through above-mentioned galvanizer on hinge component blank surface
Skill electroplating zinc-nickel alloy layer has following several advantages：1st, coating sedimentation rate is fast；2nd, the covering power of plating solution is high；3rd, electric current
Efficiency high；4th, plating solution current density range is wide, and nickel eutectoid rate is stable, and dispersibility and covering power are excellent, to equipment corrosion
It is small；5th, the zinc in zinc-nickel alloy coating, nickel content directly affect the decay resistance (deterioration rate) of pressure hinge, and zinc in coating,
The content of nickel is influenceed by solution composition, and the mass fraction of nickel can be controlled strictly in coating of the present invention, and the composition in solution is easy to
Stability contorting, passivating film is not easy to change, and wastewater treatment is simple；6th, electroplate liquid of the present invention is stable, can keep long-term use of, significantly
Improve the utilization rate of plating raw material.
Zinc ion source is the zinc compound that can be dissolved in the alkaline medium of the electrolyte, such as zinc oxide, zinc sulfate, carbonic acid
One or more in zinc, sulfamic acid zinc, zinc acetate, zinc is present in the form of zincic acid radical ion in the plating solution.Nickel ion
Source is the nickel compound that can be dissolved in the alkaline electrolyte, such as nickel sulfate, nickelous carbonate, nickel acetate, nickel sulfamic acid, nickel formate
In one or more.
Aziridine in electroplate liquid of the present invention acts as additive with TEPA one, plays the work with nickel ion complexing
With.Brightener can also be added in described electroplate liquid.
Preferably, being electroplated in three stages successively during plating, the current density of first stage is 2.0-2.5A/dm2,
Electroplating time is 5-8min, and the current density of second stage is 2.5-3.5A/dm2, electroplating time 15-30min, second stage
Current density be 3.6-3.8A/dm2, electroplating time 10-12min.
Different current densities is used in the different stages, current density is gradually increased with the time, is advantageous to the uniform of film
Deposition, prevent from depositing uneven caused obscission.
In the processing technology of above-mentioned hinge, the composition of passivating solution is in Passivation Treatment：Cerous nitrate：1.5-2.5g/L, promote
Enter agent H2O2:5-8ml/L, H3BO3Buffer：0.5-3g/L, pH most 1.5-3.2.
It is similar to electrogalvanizing, to improve the corrosion resistance of zn-ni alloy depositses, increase its ornamental, improvement coating and matrix gold
Adhesion between category, electroplated zinc nickel alloy need also exist for being passivated processing after plating terminates, and make one layer of its Surface Creation steady
The qualitative high, passivating film of dense structure.Different from general chromating, the present invention is auxiliary using cerous nitrate solution as passivating solution
With hydrogen peroxide oxidant, to hinge immersion treatment, to reach the purpose of inhibition.
During Passivation Treatment of the present invention, too low cerium salinity or too low pH value can all cause the general rust of hinge, with
Cause can influence its film-formation result, reduce the corrosion resistance of conversion film.Passivation effect be not yet with the increase of nitric acid cerium concentration and
Increasing always, its reason is that the concentration of cerous nitrate is higher, and the thicknesses of layers of formation is bigger, and the internal stress of passivating film is also bigger,
Internal stress is excessive, passivating film can be caused to ftracture, so as to reduce the decay resistance of passivating film.When pH value is too low, negative electrode is main
Generation evolving hydrogen reaction, it is unfavorable for the deposition of cerium, while substantial amounts of stomata is there is also on passivating film surface, so as to causes passivating film
Decay resistance reduce.If pH value is too high, it is unfavorable in solution cerium again in the deposition of substrate surface.Found through experiment,
During pH1.5-3.2, processing is passivated to hinge of the present invention using passivating solution as above, hinge has preferable copper sulphate drop
Performance, resistance to Neutral Salt Spray Corrosion performance, larger AC impedance, passivation effect are fabulous.
In the processing technology of above-mentioned hinge, the composition of confining liquid is 7-11g/L Na in Seal treatment2MoO4.H2O,
10-15g/L phosphate, 10-30g/L phosphoric acid, pH 4.2-4.6, the temperature of Seal treatment is 55-62 DEG C.
After molybdate solution Seal treatment, the more continuous whole densification of hinge surface film layer, matrix is served very well
Physical barriers effect, reduce the possibility that matrix is corroded.With the extension of molybdate off-period, corroded area first subtracts
Small, corrosion resistance improves.But when closed between more than 120s after, corroded area increase, corrosion resistance is gradually reduced.Its reason is
With the increase of close process time, the thickness of Molybdate Conversion Film is continuously increased, and anti-corrosion capability continues to increase, to Seal treatment
Reach optimum state during 100s；Thereafter continue to increase above 150s with close process time, it is existing that cracking can occur for conversion film
As, and corrosion proof Dominated Factors are increasingly becoming, cause hinge surface film layer etch resistant properties globality that downward trend is presented.
Compared with prior art, the invention has the advantages that：
1st, the components compatibility of hinge of the present invention is reasonable, by caused synergy between its component and its element,
Improve the performances such as the hardness, intensity, corrosion resistance of hinge.
2nd, hinge of the present invention is by first subzero treatment+lonneal, then in its electroplating surface zinc-nickel alloy layer, it is passivated
The Seal treatment of silanization treatment is carried out afterwards, further improves the corrosion resistance and mechanical performance of hinge.
Embodiment
It is the specific embodiment of the present invention below, technical scheme is further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1
Raw material is made steel：The component of steel alloy and mass percent dispensing as used in hinge：C：0.12%th, Cr：
1.5%th, Si：0.16%th, Mn：1.0%th, Al：0.04%th, N：0.012%th, Ti：0.16%th, S：0.015%th, V：0.012%th,
Nb：0.08%th, P≤0.015%, surplus are Fe and inevitable impurity；Raw material is smelted into molten steel, molten steel is through vacuum smelting
Refine, pour into a mould, being rolled into steel plate, and by steel plate machine-shaping, obtaining hinge component blank.
By hinge component blank at -150 DEG C subzero treatment 1.2h, it is low that 240 DEG C of progress are then warming up to 4 DEG C/min speed
Warm temper 135min, obtains hinge semi-finished product.
Hinge semi-finished product are handled into 40min in 42 DEG C of electroplate liquid, the composition of electroplate liquid is：Zinc ion 20g/L, nickel from
Sub- 2.4g/L, sodium hydroxide 180g/L, TEPA 12g/L, aziridine 10ml/L, citric acid 5.5g/L, potassium tartrate
Sodium 18g/L；Electroplated in three stages successively during plating, the current density of first stage is 2.2A/dm2, electroplating time is
6min, the current density of second stage is 2.8A/dm2, electroplating time 22min, the current density of second stage is 3.7A/
dm2, electroplating time 11min；The semi-finished product after plating are handled into 100s in confining liquid can obtain hinge finished product of the present invention, its
The composition of middle confining liquid is 8g/L Na2MoO4.H2O, 12g/L phosphate, 20g/L phosphoric acid, pH 4.4, the temperature of Seal treatment
For 58 DEG C.
Embodiment 2
Raw material is made steel：The component of steel alloy and mass percent dispensing as used in hinge：C：0.14%th, Cr：
1.45%th, Si：0.18%th, Mn：1.05%th, Al：0.042%th, N：0.01%th, Ti：0.20%th, S：0.018%th, V：0.10%th,
Nb：0.06%th, P≤0.015%, surplus are Fe and inevitable impurity；Raw material is smelted into molten steel, molten steel is through vacuum smelting
Refine, pour into a mould, being rolled into steel plate, and by steel plate machine-shaping, obtaining hinge component blank.
By hinge component blank at -160 DEG C subzero treatment 1.4h, 238 DEG C of progress are then warming up to 3.8 DEG C/min speed
Lonneal handles 140min, obtains hinge semi-finished product.
Hinge semi-finished product are handled into 45min, zinc ion 22g/L, nickel ion 2.0g/L, hydroxide in 40 DEG C of electroplate liquid
Sodium 160g/L, TEPA 14g/L, aziridine 10ml/L, citric acid 5.2g/L, sodium potassium tartrate tetrahydrate 16g/L；During plating according to
Secondary to be electroplated in three stages, the current density of first stage is 2.4A/dm2, electroplating time 7min, the electric current of second stage
Density is 3.2A/dm2, electroplating time 18min, the current density of second stage is 3.6A/dm2, electroplating time 11min；Will
Semi-finished product after plating handle 120s in confining liquid can obtain hinge finished product of the present invention, and the wherein composition of confining liquid is 10g/L
Na2MoO4.H2O, 14g/L phosphate, 16g/L phosphoric acid, pH 4.5, the temperature of Seal treatment is 60 DEG C.
Embodiment 3
Raw material is made steel：The component of steel alloy and mass percent dispensing as used in hinge：C：0.15%th, Cr：
1.4%th, Si：0.20%th, Mn：0.8%th, Al：0.05%th, N：0.015%th, Ti：0.12%th, S：0.022%th, V：0.08-
0.15%th, Nb：0.05%th, P≤0.015%, surplus are Fe and inevitable impurity；Raw material is smelted into molten steel, molten steel warp
Vacuum metling, pour into a mould, be rolled into steel plate, and by steel plate machine-shaping, obtaining hinge component blank.
By hinge component blank at -138 DEG C subzero treatment 1.5h, it is low that 250 DEG C of progress are then warming up to 3 DEG C/min speed
Warm temper 120min, obtains hinge semi-finished product.
Hinge semi-finished product are handled into 30min, zinc ion 15g/L, nickel ion 2.8g/L, hydroxide in 45 DEG C of electroplate liquid
Sodium 150g/L, TEPA 15g/L, aziridine 8ml/L, citric acid 6g/L, sodium potassium tartrate tetrahydrate 15g/L；During plating successively
Electroplated in three stages, the current density of first stage is 2.5A/dm2, electroplating time 5min, the electric current of second stage is close
Spend for 3.5A/dm2, electroplating time 15min, the current density of second stage is 3.8A/dm2, electroplating time 10min；By electricity
Semi-finished product after plating handle 150s in confining liquid can obtain hinge finished product of the present invention, and the wherein composition of confining liquid is 11g/L's
Na2MoO4.H2O, 10g/L phosphate, 30g/L phosphoric acid, pH 4.2, the temperature of Seal treatment is 55 DEG C.
Embodiment 4
Raw material is made steel：The component of steel alloy and mass percent dispensing as used in hinge：C：0.10%th, Cr：
1.6%th, Si：0.14%th, Mn：1.15%th, Al：0.03%th, N：0.008%th, Ti：0.22%th, S：0.005%th, V：0.15%th,
Nb：0.10%th, P≤0.015%, surplus are Fe and inevitable impurity；Raw material is smelted into molten steel, molten steel is through vacuum smelting
Refine, pour into a mould, being rolled into steel plate, and by steel plate machine-shaping, obtaining hinge component blank.
By hinge component blank at -170 DEG C subzero treatment 1h, then with 5 DEG C/min speed be warming up to 230 DEG C progress low temperature
Temper 145min, obtain hinge semi-finished product.
Hinge semi-finished product are handled into 50min, zinc ion 25g/L, nickel ion 1.8g/L, hydroxide in 38 DEG C of electroplate liquid
Sodium 200g/L, TEPA 10g/L, aziridine 15ml/L, citric acid 5g/L, sodium potassium tartrate tetrahydrate 20g/L；During plating successively
Electroplated in three stages, the current density of first stage is 2.0A/dm2, electroplating time 8min, the electric current of second stage is close
Spend for 2.5A/dm2, electroplating time 30min, the current density of second stage is 3.6A/dm2, electroplating time 12min；By electricity
Semi-finished product after plating handle 50s in confining liquid can obtain hinge finished product of the present invention, and the wherein composition of confining liquid is 7g/L's
Na2MoO4.H2O, 15g/L phosphate, 10g/L phosphoric acid, pH 4.6, the temperature of Seal treatment is 62 DEG C.
Comparative example 1
With differing only in for embodiment 1, hinge is processed using common alloy steel.
Comparative example 2
With differing only in for embodiment 1, hinge is processed using ordinary plating process (such as electrogalvanizing or electrodeposited chromium).
Comparative example 3
With differing only in for embodiment 1, handled using common passivator.
The technique that explanation is not known in the above-described embodiments is the technique of normal conventional in the prior art, such as melting, is poured
Note, rolling, Passivation Treatment etc..Zinc ion source described in above-described embodiment is zinc oxide, zinc sulfate, zinc carbonate, sulfamic acid
One or more in zinc, zinc acetate；One or more in nickel sulfate, nickelous carbonate, nickel acetate, nickel sulfamic acid, nickel formate.
The hinge for processing to obtain in embodiment 1-4 and comparative example 1-3 is subjected to performance test, test result is as shown in table 1.
Table 1：The obtained performance test of hinge is processed in embodiment 1-4 and comparative example 1-3
As known from Table 1, hinge of the present invention is processed into hinge using the rational steel alloy of compatibility, and first subzero treatment+low temperature returns
Fire, then in its electroplating surface zinc-nickel alloy layer, Passivation Treatment, Seal treatment are carried out after passivated, further improves the resistance to of hinge
Corrosivity and mechanical performance.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be substituted using similar mode, but simultaneously
Do not deviate by the spirit of the present invention or surmount scope defined in appended claims.
Claims (6)
1. a kind of hinge, it is characterised in that described hinge is made up of steel alloy, the component and its quality of the steel alloy
Percentage is：C：0.10-0.15%、Cr：1.4-1.6%、Si：0.14-0.20%、Mn：0.8-1.15%、Al：0.03-0.05%、N：
0.008-0.015%、Ti：0.12-0.22%、S：0.005-0.022%、V：0.08-0.15%、Nb：0.03-0.12%、P≤
0.015%, surplus is Fe and inevitable impurity；
The processing technology of the hinge comprises the following steps：
The component of steel alloy and mass percent dispensing as used in hinge, raw material is smelted into molten steel, molten steel is through vacuum smelting
Refine, pour into a mould, being rolled into steel plate, and by steel plate machine-shaping, obtaining hinge component blank；
By hinge component blank at -138 ~ -170 DEG C subzero treatment 1-1.5h, then at 230-250 DEG C lonneal handle 120-
145min, obtain hinge semi-finished product；
Hinge semi-finished product are handled into 30-50min in 38-45 DEG C of electroplate liquid, passivated processing, Seal treatment obtain hinge into
Product.
2. hinge according to claim 1, it is characterised in that the component and its mass percent of the steel alloy
For：C：0.12-0.15%、Cr：1.4-1.5%、Si：0.15-0.18%、Mn：0.9-1.10%、Al：0.032-0.045%、N：
0.01-0.012%、Ti：0.15-0.20%、S：0.008-0.02%、V：0.10-0.12%、Nb：0.05-0.10%, P≤0.015%,
Surplus is Fe and inevitable impurity.
3. hinge according to claim 1, it is characterised in that the heating rate after subzero treatment is 3-5 DEG C/min.
4. hinge according to claim 1, it is characterised in that electroplated in three stages successively during plating, the first stage
Current density be 2.0-2.5A/dm2, electroplating time 5-8min, the current density of second stage is 2.5-3.5A/dm2, electricity
The plating time is 15-30min, and the current density of second stage is 3.6-3.8A/dm2, electroplating time 10-12min.
5. hinge according to claim 1, it is characterised in that the composition of passivating solution is in Passivation Treatment：Cerous nitrate：1.5-
2.5g/L, Urotropinum2O2:5-8ml/L, H3BO3Buffer：0.5-3g/L, pH most 1.5-3.2.
6. hinge according to claim 1, it is characterised in that the composition of confining liquid is 7-11g/L's in Seal treatment
Na2MoO4.H2O, 10-15g/L phosphate, 10-30g/L phosphoric acid, pH 4.2-4.6, the temperature of Seal treatment is 55-62 DEG C.
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| JP5272547B2 (en) * | 2007-07-11 | 2013-08-28 | Ｊｆｅスチール株式会社 | High-strength hot-dip galvanized steel sheet with low yield strength and small material fluctuation and method for producing the same |
| RU2493287C2 (en) * | 2008-12-26 | 2013-09-20 | ДжФЕ СТИЛ КОРПОРЕЙШН | Steel material with high resistance to initiation of ductile cracks from zone subjected to welding heat impact, and basic material, and their production method |
| US8980022B2 (en) * | 2009-01-16 | 2015-03-17 | Nippon Steel & Sumitomo Metal Corporation | Case hardening steel, carburized component, and manufacturing method of case hardening steel |
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