CN107488388B - A kind of self-lubricating coating and self-lubricating hot-dip galvanizing sheet steel and its manufacturing method for heat zinc coating plate - Google Patents
A kind of self-lubricating coating and self-lubricating hot-dip galvanizing sheet steel and its manufacturing method for heat zinc coating plate Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
- B05D3/0413—Heating with air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
Abstract
The invention discloses a kind of self-lubricating coating for heat zinc coating plate, main components are as follows: alkaline soluble acrylic resin, polyvalent alcohol, small-grain-diametersilica silica sol and water, the sum of four kinds meet 100%；It further include thickener and alkali in the component of the self-lubricating coating, wherein the additive amount of thickener is subject to the viscosity for adjusting self-lubricating coating to 20-60mPas, and the additive amount of alkali, which is subject to, adjusts self-lubricating coating pH to 8.5-10.5；On the basis of the above, the present invention also provides a kind of self-lubricating heat zinc coating plates using above-mentioned self-lubricating coating, its manufacturing method are as follows: above-mentioned self-lubricating coating is applied directly to hot-galvanized steel plate surface using roller coating technology, carrying out drying using two-part drying oven can be obtained self-lubricating heat zinc coating plate, at low cost, simple production process, effectively the production difficulty and product quality of control self-lubricating heat zinc coating plate, self-lubricating heat zinc coating plate produced have excellent lubrication, forming, welding, coating, corrosion resisting property simultaneously simultaneously.
Description
Technical field
The present invention relates to a kind of self-lubricating coating for heat zinc coating plate and a kind of self-lubricating hot-dip galvanizing sheet steel and its systems
Method is made, and is related to having both excellent lubrication, forming, welding, coating, corrosion resisting property in the system of the self-lubricating hot-dip galvanizing sheet steel of one
Make method.
Background technique
For hot-dip galvanizing sheet steel due to its good corrosion resisting property, coating performance, being widely used in America and Europe is all kinds of medium and high quality
The manufacture of automobile.However, hot-galvanized steel plate surface is pure zinc coating, coating surface is softer, the coefficient of friction between mold compared with
Height, therefore, in coin complex auto parts and components, usually since rigidity of galvanizing layer is low, zinc coat friction behavior is to Sheet Metal Forming Technology
And mold is sensitive, affects the stamping formabilily of steel plate, or even stamping cracking phenomenon can occur；In production vehicle exterior cladding element
When, usually when stamping, it is easy to produce surface of steel plate dezincification, the viscous zinc phenomenon of mold, leads to stamping parts surface fleck defect,
Influence stamping parts surface quality.
By self-lubricating technology, one layer of organic or inorganic epithelium with lubricating function is coated in hot-galvanized steel plate surface,
Self-lubricating hot-dip galvanizing sheet steel is produced, the surface friction characteristics of hot-dip galvanizing sheet steel can be effectively improved.Due to reacting oneself generated
Lubricating film is firmly combined with matrix, is had good punching press greasy property, is largely used to the biggish workpiece of Pressing Deformation, can be effective
It reduces burn failure and wipes mould number, greatly promote the Pressing Deformation performance and operating rate of workpiece.And self-lubricating hot-dip galvanizing sheet steel
Not needing coating lubricating oil can be directly stamping, reduces degreasing and oiling technique, can reduce processing cost, improves
Manufacture efficiency.With the increasingly complication of auto parts, while automatization level is also being continuously improved, to improve production efficiency,
More and more processing enterprises clearly propose the use demand of self-lubricating hot-dip galvanizing sheet steel, the usage amount of self-lubricating heat zinc coating plate
Gradually expanding.
By retrieving to document resource both domestic and external, Japan rises in terms of the research and development of self-lubricating coating steel plate
Walk it is more early, in the 1980s mid-term just carried out the research in the field, the 1990s realizes and commercially produces.
In recent years, studies in China mechanism and steel mill had also carried out numerous studies.
Nippon Steel takes the lead in developing the self-lubricating electro-galvanized steel sheet of suitable micromotor shell punching press, be plating zinc surface into
The processing of row chromating, then roller coating lubricity organic coating again.2004, JFE developed a kind of inorganic lubricant coating production
Product GAN, coating structure are compound Ni-Fe-O inorganic coating again on alloying electroplated layer, improve alloyed hot-dip galvanized steel sheet
Mobile performance, can be used for the manufacture of Automobile Complex part.The technology is electroplated one in surface of steel plate first using two-step method
Laminated gold plate, then one layer of lubricant film layer is coated on its surface, production technology is complicated, high production cost.
Baosteel developed Chrome-free self-lubricating electro-galvanized steel sheet in 2006, in the table that 2007 develop for galvanized steel plain sheet
Face lubricated agent and the processing method (patent No.: CN200710045330.2
).The invention is mainly a kind of inorganic agent, includes following component: Mn2+: 0.2~30g/l, Ni2+:0.1~
10g/l, silane: 0.02~10ml/l, PO4 3-: 1~130g/l, remaining is water, and the inorganic agent pH is 1-5.This is inorganic from profit
Sliding coating can effectively improve the punching performance of steel plate, eliminate or mitigate the viscous zinc of appearance of the galvanized steel plain sheet in stamping process
Phenomenon.The product mainly uses inorganic serial system, and subsequent cleaning is bad, and higher cost.
The patent No. (CN201310169088.5) discloses a kind of self-lubricating passivating solution and with the hot galvanizing of its coating from moistening
Sliding coated steel sheet, self-lubricating passivating solution are by adjusting comprising modified solid lubricant, film forming matter, coalescing agent, promotor, pH
By compounding, the solid content after compounding is 15~25% for agent, organic solvent and deionized water, and modified solid lubricant is to change
Property nanometer MoS2With modified Nano polytetrafluoroethylparticle particle, total weight is counted according to 1000g, the content of each component are as follows: modified Nano
MoS2> 10~20g/kg, modified Nano 10~20g/kg of polytetrafluoroethylparticle particle, 80~120g/kg of film forming matter, coalescing agent
10~30g/kg, 5~15g/kg of promotor, pH adjusting agent adjust pH value to 3~6, and surplus is that organic solvent and deionized water are mixed
Close liquid.The product film layer is thick, and baking temperature is high, and production cost is higher.
The addition of self-lubricating coat in use can effectively improve the greasy property and punching performance of steel plate.But surface of steel plate from
Lubricant film layer has completely cut off metal to a certain extent and has contacted with external, so will affect its welding performance；Meanwhile if from moistening
Stratum synoviale handles before coating process and is unable to get 100% cleaning in section, then can impact to subsequent phosphatization and coating.Cause
This, develops with application performances such as good stamping performance, welding performance, coating performances in the self-lubricating steel plate of one,
It is able to satisfy the requirement of user.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of for heat in view of the deficiency of the prior art
The self-lubricating coating and self-lubricating heat zinc coating plate and its method for manufacturing of galvanized sheet, at low cost, simple production process, simultaneously
The effectively production difficulty and product quality of control self-lubricating heat zinc coating plate, self-lubricating heat zinc coating plate produced has excellent simultaneously
Lubrication, forming, welding, coating, corrosion resisting property.
The present invention be solve the problems, such as it is set forth above used by technical solution are as follows:
A kind of self-lubricating coating for heat zinc coating plate, main component are as follows: alkaline soluble acrylic resin, polyvalent alcohol, small
Partial size silica solution and water.Wherein, small-grain-diametersilica silica sol SiO2·nH2SiO in O2Partial size < 10nm.
According to the above scheme, the main component of the self-lubricating coating for heat zinc coating plate, by weight percentage are as follows: alkali soluble
Property acrylic resin 5-10%, polyvalent alcohol 1-5%, small-grain-diametersilica silica sol 0.5-1%, remaining is water, the sum of four meet
100%.
The above-mentioned self-lubricating coating for heat zinc coating plate, further includes a small amount of thickener and alkali in component, wherein thickener
Additive amount be subject to the viscosity for adjusting self-lubricating coating to 20-60mPas, the additive amount of alkali is to adjust self-lubricating coating pH
To 8.5-10.5.Present invention addition alkali adjusting pH value is based primarily upon considered below: manufacture alkaline environment provides acrylic acid tree
The decentralized medium of rouge；Conductive ion is provided, the electric conductivity of coating is enhanced, reduces the influence for steel plate welding performance；Silica solution
Particle surface charge density is larger as PH to 8.5-10.5, and zeta potential is high, is mainly shown as that repulsion acts between particle, silica solution
Can maintain a long-term stability state, be not in gelatin phenomenon.
According to the above scheme, the thickener is mainly selected from agent for polyacrylic acid thickening and polyurethanes thickener
According to the above scheme, the alkali mainly uses the common inorganic base such as NaOH.
According to the above scheme, the polyvalent alcohol is mainly the polyvalent alcohols such as polyethylene glycol, polypropylene glycol, and molecular weight is 1800
~2200.The present invention, as emollient component, has good lubricity, water using polyvalent alcohols such as polyethylene glycol, polypropylene glycols
Dissolubility.Emollient component, polyvalent alcohol or a kind of good surfactant are commonly used compared to other, and cheap, with propylene
Acid resin has good intermiscibility.In view of unit is to the appearance and table after the adaptability and steel plate punched of low-friction coefficient product
Face quality controls its content in 1-5%.
The present invention uses alkaline soluble acrylic resin, which can dissolve using alkaline solution, decentralized medium, well
Intensity and ductility can play the role of binder, make that there is after surface of steel plate punching press good appearance.Importantly,
The present invention uses alkaline soluble acrylic resin, and the self-lubricating film of surface of steel plate has good demoulding in degreasing agent, if
Content is too low, and processing performance is bad, coating stability declines；Too high levels, demoulding, weldability decline, therefore by its content
Control is in 5-10%.
The present invention is using small-grain-diametersilica silica sol as additive, SiO2Skin film strength can be increased, improve its damage resistant
With scratch performance, guarantee the integrality of coating, and SiO2Partial size it is smaller, the corrosion resisting property after steel plate plate and cupping is just
Better.Due to small-grain-diametersilica silica sol, SiO2After nanoparticle is less than 10nm, therefore drying is dry, the combination between particle
Power is very strong, and film forming is very good.In the present invention, if small-grain-diametersilica silica sol content is too low, coating stability decline, corrosion resistance
It can improve not significant；Too high levels, demoulding is bad, welding performance declines, therefore its content is controlled in 0.5-1%.
On the basis of the above, the present invention also provides a kind of self-lubricating heat zinc coating plate using above-mentioned self-lubricating coating, systems
Make method are as follows: above-mentioned self-lubricating coating is applied directly to hot-galvanized steel plate surface using roller coating technology, is dried using two-part
Furnace is dried, and control unit speed guarantees uniform coating and the film-forming of self-lubricating coating, can be in hot-dip galvanizing sheet steel table
Face forms self-lubricating film, obtains self-lubricating heat zinc coating plate.Wherein, self-lubricating epithelium Weight control is in 200-700mg/m2, excellent
Select 350-400mg/m2。
According to the above scheme, the roller coating technology is used along technique is applied, and parameter setting is as follows: surface mention material roller speed ratio 0.4~
0.8, lower surface proposes material roller speed ratio 0.5~0.6；Upper surface applicator roll speed ratio 0.6~0.9, lower surface applicator roll speed ratio 0.6~
0.7；Above mention material roller and upper applicator roll between roll-in be 2.5~4.0kN, under mention material roller and lower applicator roll between roll-in be
2.0~3.0kN.
According to the above scheme, the drying mode is hot-air seasoning, and technological parameter: two-part drying oven controls steel plate temperature
70~120 DEG C of PMT temperature.
It is to guarantee self-lubricating coating in the uniform coating of surface of steel plate and complete film-forming, unit speed controls 80~
100m/min。
The above-mentioned self-lubricating heat zinc coating plate using self-lubricating coating, dynamic friction coefficient≤0.11, greasy property obtain significantly
It improves；Compared with non-treated heat zinc coating plate, average Erichsen number increases by 6.5%, and punching performance is significantly improved, and may be implemented
The substitution of " with low strap height " at least one punching press grade；Welding performance, coating performance and non-treated heat zinc coating plate are in peer-level；
For plate salt spray test up to 120h, corrosion resisting property is substantially better than non-treated heat zinc coating plate.
Compared with prior art, the present invention has the beneficial effect that:
(1) different from other self-lubricating coatings, self-lubricating coating of the present invention innovatively introduces polyvalent alcohol as profit
Lubrication prescription introduces small-grain-diametersilica silica sol as additive, and component can assign the collection of the more excellent performances of self-lubricating steel plate with proportion
In；Meanwhile the introducing of NaOH, the electric conductivity of solution can be improved, solve punching performance is good, welding performance will difference contradiction,
And the raising of corrosion resisting property is realized on the basis of punching performance improves.
(2) present invention is able to achieve self-lubricating coating in hot dip by the comprehensively control of roller coating, stoving process and unit speed
The self-lubricating film that zinc surface of steel plate is formed sufficiently solidifies and uniformly coating, and realizes going all out to do one's duty regardless of personal danger for self-lubricating film film weight range
In, simple production process, production process is controllable.
(3) self-lubricating heat zinc coating plate produced by the invention has excellent comprehensive performance: dynamic friction coefficient≤0.11, lubrication
Performance is significantly improved；Compared with non-treated heat zinc coating plate, average Erichsen number increases by 6.5%, and punching performance is significantly mentioned
The substitution of at least one punching press grade " with low strap height " may be implemented in height；Welding performance, coating performance and non-treated heat zinc coating plate
In peer-level；Corrosion resisting property is substantially better than non-treated heat zinc coating plate.
In conclusion the present invention can obtain greasy property excellent, punching performance, cleaning performance, welding performance, coating
Can good self-lubricating hot-dip galvanizing sheet steel, and, the self-lubricating heat zinc coating plate developed, punching press grade can reach " with low strap
It is high that " raising of at least one punching press grade greatly improves the punching press success rate of complex parts, improves the production of processing and manufacturing enterprise
Efficiency reduces simultaneously steady production cost.
Detailed description of the invention
In Fig. 1, (a, b) is positive and negative surface topography map (SEM image) after non-treated heat zinc coating plate phosphatization in comparative example 1；(c,
It d) is positive and negative surface topography map (SEM image) after self-lubricating heat zinc coating plate phosphatization in embodiment 4.
In Fig. 2, (a) be in comparative example 1 in non-treated heat zinc coating plate and embodiment 4 after self-lubricating heat zinc coating plate electrophoresis directly
Hundred lattice remove exterior view；It (b) is that non-treated heat zinc coating plate (referred to as non-treated plate, similarly hereinafter) and self-lubricating heat zinc coating plate (referred to as apply
Diaphragm plate, similarly hereinafter) electrophoresis, hundred lattice shell exterior view after 50 DEG C of * 95%RH 240h；It (c) is in no heat zinc coating plate and embodiment 4 from profit
Sliding heat zinc coating plate electrophoresis, hundred lattice shell exterior view after 40 DEG C of pure water impregnate 240h.
Fig. 3 is that different stage applies diaphragm plate and the non-treated heat zinc coating plate high speed deep-draw test result of comparative example 1.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but the present invention is not
It is limited only to the following examples.
Heat zinc coating plate used is oiling heat zinc coating plate DX54D+Z in embodiment, is regarded as comparative example 1, real below
It applies in example, the performance of self-lubricating heat zinc coating plate is compared with it.
Examples 1 to 6
A kind of self-lubricating coating for heat zinc coating plate, main component are as follows: alkaline soluble acrylic resin, polyvalent alcohol, small
The water of partial size silica solution and surplus, the sum of this mass percent meet 100%, as shown in table 1；On this basis, add
Add thickener adjust self-lubricating coating viscosity to 30~55mPas, then with sodium hydroxide adjust self-lubricating coating pH to
8.5~10.5, the specific viscosity of each embodiment, pH are as shown in table 1.
In Examples 1 to 6, small-grain-diametersilica silica sol SiO2·nH2SiO in O2Partial size < 10nm.
In Examples 1 to 6, alkaline soluble acrylic resin is carboxylic alkaline soluble acrylic resin.Firstly, with solid base
Soluble acrylic resin BASF JONCRYL678 (molecular weight 8600, BASF Aktiengesellschaft) and deionized water are according to the molten of 4:6
Liquid mixing；Then methyl methacrylate (MMA), butyl acrylate (BMA), styrene are added in this solution, and add idol
Nitrogen bis-isobutyronitrile (AIBN) is used as radical initiator, is made so that the method for being copolymerized final desolventizing is added dropwise.Wherein MAA content is
20%, BMA content are 15%, styrene-content 5%, and alkali soluble resins solution content is 60%.MMA, BMA, styrene and
Azodiisobutyronitrile is purchased from Solution on Chemical Reagents in Shanghai company.
Thickener uses the TT935 of agent for polyacrylic acid thickening in Examples 1 to 3, and the thickener in embodiment 4-6 uses
The RM-2020NPR of polyurethanes thickener, is purchased from DOW Chemical.
Table 1
Self-lubricating heat zinc coating plate, manufacturing method are manufactured using self-lubricating coating provided by above-described embodiment 1~6 respectively
Are as follows: behind heat zinc coating plate outlet, self-lubricating coating is applied directly to hot-galvanized steel plate surface using roller coating technology, using two sections
Formula drying oven is dried, and control unit speed guarantees uniform coating and the film-forming of self-lubricating coating, can be in hot galvanizing
Surface of steel plate forms self-lubricating film, obtains self-lubricating heat zinc coating plate, stand-by after finishing.The specific production technology of each embodiment is joined
Number is as described in Table 2.Wherein, self-lubricating epithelium Weight control is in 250-600mg/m2；Material roller speed ratio (upper and lower) is mentioned to respectively represent
Surface proposes material roller speed ratio, lower surface proposes material roller speed ratio；Applicator roll speed ratio (upper and lower) respectively represents upper surface applicator roll speed ratio, following table
Face applicator roll speed ratio；Roll-in (upper and lower) respectively represent mention roll-in between material roller and upper applicator roll, under mention material roller and lower coating
Roll-in between roller.
Table 2
Performance detection is carried out to above-described embodiment 1~6 and comparative example 1 respectively, mainly there is following evaluation:
(1) PVvalue testing: using 14 surface property testing machine of HEIDON Type to Examples 1 to 6 and comparative example 1
The coefficient of friction of sample surfaces is tested.Wherein, load weight 1kg, sliding speed 150mm/min, sliding distance are
100mm, the results are shown in Table 3.
(2) Erichsen number test is carried out to Examples 1 to 6 and 1 sample of comparative example using BUP400 cupping testing machine.Wherein,
Pressure-pad-force is 10KN, and drawing velocity 1mm/s, test method is according to the regulation execution of GB/T 4156, and the results are shown in Table 3.
(3) spot welding characteristics test is carried out to Examples 1 to 6 and 1 sample of comparative example using intermediate frequency DC spot welding testing machine, it is right
Its welding current range is investigated.Wherein, tapered electrode end face diameter is 6mm, electrode pressure 2.5kN, and weld interval is
240ms, retention time 160ms, the results are shown in Table 3.
(4) phosphatization test is carried out to Examples 1 to 6 and 1 sample of comparative example using the phosphating process of automobile factory, to phosphating coat
Weight tested, the results are shown in Table 3.Meanwhile using QUANTA400 scanning electron microscope to two class steel plate phosphatizations after
Surface topography observed, as shown in Fig. 1 (a), (b), (c), (d).Two class steel plates are carried out using automobile factory's coating process
Electrophoresis is tested the coating binding force after two class steel plate electrophoresis using the method that hundred lattice are removed, as a result as shown in Figure 2.
(5) neutral salt spray test is carried out to Examples 1 to 6 and 1 sample of comparative example, its corrosion resisting property is compared.Benefit
Surface of steel plate is wiped with dehydrated alcohol, removes the greasy dirt and dust of surface of steel plate.After sample pretreating, to steel plate into
Row salt spray test, test period 120h, the results are shown in Table 3.Wherein, the concentration of sodium chloride solution are as follows: 5%；Amount of fog are as follows:
1.5ml/h, test method are executed according to the regulation of GB/T 10125.
Table 3
Embodiment 7
It is assessed for the excellent performance further to self-lubricating heat zinc coating plate, according to the processing mode of embodiment 4 to heat
Galvanized sheet DX53D+Z carries out the coating (- L) of self-lubricating film, and introduces comparative example 2: the non-treated heat zinc coating plate of same thickness
DX56D+Z。
Deep-draw test is carried out to embodiment 3, embodiment 7 and comparative example 2 using high speed deep drawing test machine, model is shaped to it
It encloses and is assessed.Wherein, punch diameter 50mm, drawing velocity 30m/min, mold outer diameter are 50mm, and steel plate outer diameter is
105mm, 107.5mm, 110mm, ram ratio 2.1,2.15,2.2.Test method is executed according to the regulation of GB/T 15825.3.
Test result is as shown in Figure 3.
Illustrated by 3 test result of table: common non-treated heat zinc coating plate is after self-lubrication treatment of the invention, friction system
Number is substantially reduced, and is maintained at≤0.11 level, greasy property is improved significantly；In cupping test, it is coated from
After slip coating, the punching stroke of conventional galvanizing plate is significantly improved, and cup height when cup body cracks has increased above 6%.
In welding performance test, it is coated with the heat zinc coating plate of self-lubricating epithelium and the welding current range base of non-treated plate
This coincidence, since automobile factory can remove upper and lower limit when selecting welding procedure, it can thus be assumed that the welding performance of the two is same
It is horizontal.In phosphatization test, self-lubricating heat zinc coating plate and the phosphorization film weight of non-treated plate are almost the same, and phosphatization grain form exists
10 μm or so；After electrophoresis, coating surface binding force is also in peer-level.Self-lubricating epithelium can be looked forward to going completely in degreaser in vehicle
It removes, subsequent coating performance will not be impacted.In salt spray test, it is coated with the heat zinc coating plate of self-lubricating epithelium, is passed through
Just partially occurs the white rust of 1%-2% area after 120h, corrosion resisting property is substantially better than conventional galvanizing plate.
Pass through the forming range of self-lubricating heat zinc coating plate and the high non-treated heat zinc coating plate of punching press grade to low punching press grade
It is tested, referring to Fig. 3, it can be found that self-lubricating coating according to the invention and production technology, can not only realize hot galvanizing
Plate forming property greatly improves, moreover it is possible to the target for realizing " high with low generation ", in stamping ability, and low trade mark film product
It can be realized the substitution an of grade, the high trade mark conventional galvanizing product of even two grades.
In conclusion self-lubricating hot-dip galvanizing sheet steel of the invention has excellent comprehensive performance, by using suitable raw
Production. art coats self-lubricating coating, and hot dip galvanizing automobile plate surface dynamic friction coefficient can be effectively reduced, significantly extension heat zinc coating plate
Processable range, improve the forming capacity of steel plate, improve the corrosion resisting property of steel plate.Meanwhile subsequent welding, coating etc. are answered
Adverse effect will not be generated with performance, vehicle enterprise scene can be directly applied to by being not required to any switching.
The above is only a preferred embodiment of the present invention, it is noted that come for those of ordinary skill in the art
It says, without departing from the concept of the premise of the invention, several modifications and variations can also be made, these belong to of the invention
Protection scope.
Claims (8)
1. a kind of self-lubricating coating for heat zinc coating plate, it is characterised in that its main component are as follows: alkaline soluble acrylic resin,
Polyvalent alcohol, silica solution and water, four by weight percentage are as follows: alkaline soluble acrylic resin 5-8%, polyvalent alcohol 2-5%, silicon
Colloidal sol 0.6-1%, remaining is water, and the sum of four kinds meet 100%；Further include in the component of the self-lubricating coating thickener and
Alkali, wherein the additive amount of thickener is subject to the viscosity for adjusting self-lubricating coating to 20-45mPas, and the additive amount of alkali is to adjust
Subject to self-lubricating coating pH to 8.5-9.5；
The thickener is mainly selected from agent for polyacrylic acid thickening or polyurethanes thickener；The polyvalent alcohol mainly includes gathering
Ethylene glycol, polypropylene glycol, molecular weight is 1800~2200.
2. a kind of self-lubricating coating for heat zinc coating plate according to claim 1, it is characterised in that the silica solution is
Small-grain-diametersilica silica sol SiO2·nH2O, wherein SiO2Partial size < 10nm.
3. a kind of self-lubricating heat zinc coating plate, it is characterised in that using self-lubricating coating described in claim 1 in hot-dip galvanizing sheet steel
Surface forms self-lubricating film.
4. a kind of manufacturing method of self-lubricating heat zinc coating plate, it is characterised in that: using roller coating technology will it is described in claim 1 oneself
Slip coating is applied directly to hot-galvanized steel plate surface, is dried using drying oven, and control unit speed guarantees that self-lubricating applies
The uniform coating of material and film-forming can form self-lubricating film in hot-galvanized steel plate surface, obtain self-lubricating heat zinc coating plate.
5. a kind of manufacturing method of self-lubricating heat zinc coating plate according to claim 4, it is characterised in that the self-lubricating applies
Film Weight control is in 200-400mg/m2。
6. a kind of manufacturing method of self-lubricating heat zinc coating plate according to claim 4, it is characterised in that the roller coating technology
Using along technique is applied, parameter setting is as follows: upper surface proposes material roller speed ratio 0.4~0.8, and lower surface proposes material roller speed ratio 0.5~0.6；
Upper surface applicator roll speed ratio 0.6~0.9, lower surface applicator roll speed ratio 0.6~0.7；Above mention the roller between material roller and upper applicator roll
Pressure be 2.5~4.0kN, under mention material roller and lower applicator roll between roll-in be 2.0~3.0kN.
7. a kind of manufacturing method of self-lubricating heat zinc coating plate according to claim 4, it is characterised in that the drying mode
For hot-air seasoning, technological parameter: the temperature control steel plate temperature of drying oven is at 70~80 DEG C.
8. a kind of manufacturing method of self-lubricating heat zinc coating plate according to claim 4, it is characterised in that unit speed control
In 80~100m/min.
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