CN110359001A - A kind of process and its equipment for producing think gauge hot substrate and having colored galvanizing production - Google Patents

A kind of process and its equipment for producing think gauge hot substrate and having colored galvanizing production Download PDF

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Publication number
CN110359001A
CN110359001A CN201910819733.0A CN201910819733A CN110359001A CN 110359001 A CN110359001 A CN 110359001A CN 201910819733 A CN201910819733 A CN 201910819733A CN 110359001 A CN110359001 A CN 110359001A
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zinc
plated
colored
temperature
smooth
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Inventor
王野
周成
郑志刚
齐林雷
李远旭
何宇
卢欢
徐帅
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Rizhao Baohua New Material Co Ltd
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Rizhao Baohua New Material Co Ltd
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Priority to CN201910819733.0A priority Critical patent/CN110359001A/en
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    • 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06Zinc or cadmium or alloys based thereon
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26After-treatment
    • 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36Elongated material
    • C23C2/40Plates; Strips

Abstract

The invention discloses a kind of processes and its equipment for producing think gauge hot substrate and having colored galvanizing production, belong to a kind of process for producing steel and iron, processing step includes that → finished product is dried → batched to hot rolling raw material → uncoiling → welding machine → broken phosphorus → pickling and rinsing → smooth → induction plus stove heating → zinc-plated → cooling → straightening → Passivation Treatment →;Wherein, induction plus stove heating are heated using induction coil, and 500~550 DEG C of heating temperature, this process strip does not recrystallize;It is zinc-plated in galvanized pot: to enter 480-520 DEG C of pot temperature, zinc liquid temperature: 465 ± 5 DEG C;Scale breading, smooth, straightening breaking elongation are controlled 2.9 ± 0.4%.Compared with prior art, production cost is reduced on the basis of ensuring product technology effect.

Description

A kind of process and its equipment for producing think gauge hot substrate and having colored galvanizing production
Technical field
The present invention relates to a kind of hot substrates flower hot-galvanized technique, spends heat especially for thickness >=2.0mm hot substrate A kind of smooth zinc-plated Unit erriger of continuous acid-washing used in zincincation method and the process.
Background technique
Galvanizing production has the comprehensive performances such as good corrosion resistance, formability, weldability and paintability, is widely answered For industries such as automobile, household electrical appliances.The galvanizing production of cold-rolled substrate and hot-rolled substrate can be divided by type of substrate, from energy-saving ring conformal Degree sets out, and research in recent years focuses mostly on the zinc-plated trial-production of hot-rolled substrate.Traditional cold-rolled substrate is zinc-plated will to pass through two works The production of sequence, thickness specification≤2.0mm, first hot rolled coil pass through pickling and Mill rolling technics through overpickling Unit erriger process It is rolled into cold-rolled substrate product;Then cold-rolled substrate has bad luck zinc-plated raw material storage, by the de- of continuous annealing galvanizing unit process Rouge zincincation is produced into galvanizing production.So-called hot-rolled substrate is zinc-plated to replace cold rolling coil as zinc-plated base using hot rolling acid-cleaning volume Plate eliminates cold rolling process, also to pass through two processes without cold reduced work hardened but traditional hot-rolled substrate is zinc-plated Production, hot rolled coil first is produced as acid-washed product by pickling unit process;Then acid-washed product has bad luck zinc-plated raw material storage, Galvanizing production is produced into the degreasing zincincation Jing Guo continuous annealing galvanizing unit process.The work of both traditional zincincations All there is coil of strip between sequence and frequently have bad luck transit link, the production cycle is long, and production efficiency is low, while strip is equal in galvanizing process The recrystallization annealing of generation, annealing temperature >=680 DEG C, and cold-rolled substrate zincincation will more pass through the rolling of milling train, compression Than being greater than 80%, energy consumption is high, high production cost.
Summary of the invention
Technical assignment of the invention is for the above the deficiencies in the prior art, and providing a kind of hot substrate has flower hot-galvanized work Skill has one kind used in flower hot-galvanized process and the process especially for thickness >=2.0mm hot substrate The smooth zinc-plated Unit erriger of continuous acid-washing.
The present invention the technical solution to solve the technical problem is that: a kind of work for producing think gauge hot substrate and having colored galvanizing production Process, which is characterized in that processing step include hot rolling raw material → uncoiling → welding machine → broken phosphorus → pickling and rinsing → smooth → → finished product is dried → batched to induction plus stove heating → zinc-plated → cooling → straightening → Passivation Treatment →;Wherein, induction plus stove heating It is heated using induction coil, 500~550 DEG C of heating temperature, this process strip does not recrystallize;It is zinc-plated in galvanized pot: to enter pot 480-520 DEG C of temperature, zinc liquid temperature: 465 ± 5 DEG C;Scale breading, smooth, straightening breaking elongation are controlled 2.9 ± 0.4%.
The sum of above-mentioned scale breading, smooth equipment elongation percentage are 2.1 ± 0.2%.
Above-mentioned broken phosphorus machine single devices elongation percentage 0.8%.
Above-mentioned acid cleaning process includes two descaling baths, and rinsing process is 5 grades of rinsing sections.
Composition Control in above-mentioned zinc pot are as follows: Al 0.20~0.26%;Sb 0.09~0.13%;Cd≤0.03%;Fe ≤ 0.03%.
Compared with prior art, the invention has the following advantages:
1, the present invention is a kind of smooth zinc-plated Unit erriger of continuous acid-washing and think gauge hot substrate has and spends zinc-plated producer Method.The present invention is with regard to a process unit, i.e., after hot rolled coil is directly entered the heating of galvanizing furnace inner inductive coil after overpickling is smooth Zinc-plated and surface treatment becomes galvanizing production, and crystallized annealing does not occur again for strip.Cold rolling process is eliminated, without supercooling Processing hardening is rolled, while eliminate coil of strip between process has bad luck link, production cost is greatly lowered in high production efficiency;
2, it is heated in galvanizing furnace of the present invention using induction coil, heating temperature is low, and strip does not recrystallize, reduces energy Consumption, is greatly lowered with the substantially zinc-plated production cost of traditional cold rolling;
3, the present invention whole, double straightenings, induction heating furnace technology using the double flat of domestic initiation, improve production efficiency, realize With the production of raw material varying strength rank galvanizing production;
4,0.8-4.0mm, the zinc-plated production of production are expanded to using the galvanizing production thickness specification that this technique and equipment produce The industries such as tubulation, automobile, household electrical appliances are widely applied in product, enrich the breed structure of day steel.Day proprietary brand of galvanizing steel product is made, is had There is vast market prospect, obtains considerable economic benefit.
Detailed description of the invention
Fig. 1 is combination diagram of the present invention.
Specific embodiment
The present invention is further described With reference to embodiment.
Traditional have that colored galvanized sheet is zinc-plated using cold-rolled substrate or hot substrate is zinc-plated, using open fire or heated by gas, annealing Recrystallization annealing occurs for temperature >=680 DEG C, strip.The present invention is to spend after hot substrate pickling zinc-plated, and heating furnace uses the line of induction Circle heating, heating temperature is low, and before entering zinc pot, strip does not have annealing recrystallization, and it is domestic that hot substrate of the present invention, which has colored zincincation, A kind of completely new process.
Cold-rolled substrate control group
Substrate specification 3mm, using the cold-rolled substrate hot dip galvanizing process of the prior art;Two tandem mill processes are needed to carry out Production;
Process 1: sour rolling mill: hot rolling raw material → uncoiling → welding machine → broken phosphorus → pickling and the big pressure rolling of rinsing → milling train → batch → cold-rolled substrate finished product;
Process 2: galvanizing unit: cold-rolled substrate product volume is poured zinc-plated raw material storage → uncoiling → welding machine → cleaning by degreasing → into and is moved back Fiery (strip generation recrystallization annealing) → zinc-plated → cooling → finishing → straightening → passivation → drying → surface inspection → oiling → Bundling → batch → finished product.Wherein cold rolling reduction ratio be 80% or so, 700 DEG C of annealing temperature >.Cold-rolled substrate zincincation is This field mature technology, therefore other parameters are not enumerated one by one herein, do not address what parameter was known to the skilled person Conventional parameter.
Hot-rolled substrate control group
Substrate specification 3mm needs two tandem mill processes to be given birth to using the hot-rolled substrate zincincation of the prior art It produces;
Process 1: pickling unit: → hot substrate pickling production is batched in hot rolling raw material → uncoiling → broken phosphorus → pickling and rinsing → Product;
Process 2: galvanizing unit: acid-washed product pours zinc-plated raw material storage → uncoiling → welding machine → cleaning by degreasing → annealing (band into Recrystallization annealing occurs for steel) → zinc-plated → cooling → finishing → straightening → passivation → drying → surface inspection → oiling → bundling → Batch → finished product.Wherein, annealing temperature is 680 DEG C of annealing temperature >.The hot-rolled substrate zincincation of annealing is that this field is mature Technique, therefore other parameters are not enumerated one by one herein, do not address the conventional parameter that parameter is known to the skilled person.
The each embodiment integrated artistic of the present invention is using heat bundle substrate pickling zincincation: hot rolling raw material → uncoiling → Welding machine → broken phosphorus → pickling and rinsing → smooth → induction plus stove heating (strip does not recrystallize) → zinc-plated → cooling → drawing It rectifys → Passivation Treatment → and dries → batch → finished product.
Equipment used in each embodiment of the present invention is the smooth zinc-plated Unit erriger of continuous acid-washing, structure combination are as follows: Pan feeding operation unit, broken phosphorus operation unit, pickling and the rinse operation unit, leveling operation list being connected by transmission device sequence Member, heating operation unit, zinc-plated operation unit, cooling operations unit, finishing operation unit, straightening operation unit, passivation operation Unit, discharging operation unit.The appropriate transmission device of relativity is selected between different equipment routinely to select in steel production It selects, is not repeated herein.
Some products need finishing, finishing process can be added between cooling and straightening process, that is, above-mentioned Polishing machine is added in equipment, as shown in Figure 1, the concrete technology flow process of finishing of the present invention are as follows: 1 → entrance of uncoiler cuts 2 → welding machine 3 → entry loop 4 → broken 5 → descaling bath of phosphorus machine 6 → rinsing, 7 → dryer of section, 8 → planisher, 9 → induction heater 10 → heat The passivation of room 11 → galvanized pot, 12 → air knife, 13 → cooling blower, 14 → watch-quench tank, 15 → polishing machine, 16 → withdrawal straightening machine, 17 → roller coating Cut 21 → coiling machine 22 in 18 → outlet looping of device, 19 → inspection desk 20 → outlet.
Specific process function are as follows:
1,2, welding machine 3, entry loop 4 pan feeding operation unit: are cut including uncoiler 1, entrance.Uncoiler 1 carries out coil of strip and opens Volume;Entrance cuts 2: cutting away band steel taping head, magnetic tape trailer defect, is conducive to welder;Welding machine 3 carries out two coil of strip welding, guarantees machine Group continuous production;Entry loop 4 stores strip, realizes that unit upgrading fast-growing produces;
2, break phosphorus operation unit: including breaking phosphorus machine 5, damaged raw material belt steel surface iron scale improves pickling effect, and changes Kind raw material belt plate shape;
3, pickling and rinse operation unit: including descaling bath 6, rinsing section 7, dryer 8.Descaling bath 6 specifically includes 2 acid Washing trough, for washing off belt steel surface iron scale, 50 meters of descaling bath total length;Rinsing section is specially 5 grades of rinsing sections, for washing off Belt steel surface remains the ion and impurity of Cl, improves surface cleanness, is conducive to zinc-plated;In prioritization scheme, the last one rinsing It can be equipped with a high-pressure flushing device after section, can further improve the cleaning effect of belt steel surface;Dryer 8: it dries from drift Washing trough comes out belt steel surface moisture content, prevents from corroding;
4, leveling operation unit: including planisher 9, improve belt plate shape, and raw band is improved by working roll roughness Steel surface is coarse, is conducive to strip steel Zn-plating;
5, heating operation unit: induction heater 10, heat room 11 including sequential connection.Induction heater 10 passes through sense Coil is answered to heat to strip, 550 DEG C of maximum temperature;Heat room 11 is kept the temperature by electric radiant tube to strip, and 450 DEG C of maximum temperature, Strip heat preservation is given, is guaranteed before strip enters zinc pot in certain temperature range;Recrystallization annealing does not occur for strip in furnace, reduces Energy consumption;
6, zinc-plated operation unit: including galvanized pot 12 and air knife 13;By controlling zinc pot temperature, zinc liquid ingredient, three rollers The technological parameters such as six arms, air knife carry out zinc-plated;
7, cooling operations unit: including cooling blower 14 and watch-quench tank 15;Cooling zinc-plated rear belt steel surface temperature, protects work Skill rubber roller influences subsequent passivated surface treatment process and passivation effect if belt steel surface temperature is excessively high;
8, finishing operation unit: including polishing machine 16.To improve zinc-plated rear belt plate shape and surface texture;For not only Whole product, the processing step and the operation unit can be deleted.It, can be between watch-quench tank 15 and polishing machine 16 in prioritization scheme There is loop among one group.
9, straightening operation unit: including withdrawal straightening machine 17.Single roller box or double roller are selected according to steel strip thickness and intensity rank Box.Slab can realize that double straightenings improve plate shape using double roller box.
10, it is passivated operation unit: including roller coating passivating device 18;Make belt steel surface that there is layer protecting film by passivation, Play the role of anti-corrosion, antirust;
11, discharge operation unit: cutting 21 and coiling machine 22 including outlet looping 19, inspection desk 20, outlet;Outlet looping 19 Strip is stored, realizes that unit upgrading fast-growing produces;1 inspection desk 20, employee carry out belt steel surface inspection;Cut 21 in outlet: shearing strip Bundling by weight;Coiling machine 22: strip is batched.
Above-mentioned each device is common installations and facilities in the production of existing steel, therefore the specific knot of monomer equipment Structure is not repeated herein.
Technology essential factor of the invention is characterized in that:
1, the present invention is pickling hot galvanizing tandem mill, is a tandem mill producing line, with traditional cold-rolled substrate and hot rolling Substrate zincincation is compared, and mill milling process links have been lacked, while reducing cold-rolled substrate or hot radical acid-washed product to zinc-plated original Link is had bad luck in material library, shortens the production cycle, improves production efficiency, production cost is greatly lowered.
2, the galvanizing furnace of pickling hot galvanizing tandem mill of the present invention, is heated using induction coil, maximum heating temperature in furnace It is 550 DEG C, strip does not recrystallize.Compared with the zincincation of traditional open firing or heated by gas, low energy consumption, and cost is big Amplitude reduction.
3, the present invention is directly zinc-plated after hot-rolled substrate pickling, only there are two descaling bath, 50 meters of descaling bath total length, and with biography System acid cleaning process is very different, and traditional acid cleaning process generally has 3 or 4 descaling baths, and 100 meters of descaling bath total length or more. Acid cleaning process and rinsing process of the invention has a great impact to the subsequent quality for having colored galvanizing production.
4, since ESP think gauge raw material plate shape is poor, to guarantee the plate shape and zinc-plated rear belt plate shape into zinc pot strip, this hair The bright double flat using domestic initiation is whole, enter galvanizing furnace after pickling before increase a smooth machine equipment, one is equipped with after zinc-plated Finishing machine equipment, while the production for increasing a pulling-straightening equipment before being passivated, realizing same raw material varying strength rank galvanizing production.
5, the zinc-plated stove of the zinc-plated producing line of the present invention is induction heater, the core heat and conventional anneal galvanized wire ratio of strip Relatively there is the difference of increasing: the stove feature for galvanized wire of annealing: 100 meters of furnace superintendent or so, heating segment length, fire box temperature is high, and strip arrives Core heat is very big before up to cooling blower, so needing plate temperature drop to very low, plate temperature is due to core heat when close to zinc liquid It distributes outward and is increased to suitable temperature (i.e. 15-20 DEG C higher than zinc liquid temperature).The stove of producing line of the present invention is induction heating, About 100 microns of belt steel surface are heated to very high temperature, but due to the effect of heat transfer, strip reaches strip before cooling blower Temperature has had declined much, and the small effect for only serving heat preservation of subsequent electric radiant tube power, so strip enters pot temperature It is relatively higher.
Specific embodiment is as follows:
Embodiment 1
Hot rolling raw material: ESP hot rolling raw material, 3.0mm, width 1250mm;DX51D+Z.
1, uncoiling uncoiling: is carried out to hot rolled coil;
2, welding machine: former and later two coil of strips weld together, and guarantee the operation of unit continuous production.
3, it breaks phosphorus machine: breaking belt steel surface iron scale and improve plate shape, single devices elongation percentage 0.8%.
4, pickling and rinsing process:
Acid cleaning process: belt steel surface iron scale is washed off.Remaining scale defect can generate plating leakage etc. when zinc-plated Defect, only there are two descaling baths for galvanized wire of the present invention, and 50 meters of descaling bath total length, groove body is short, therefore to improve pickling effect as far as possible Fruit;The free acid concentration 60-80g/l of 1# slot;Sour 80-83 DEG C of temperature, total acidity >=190g/L;Free acid concentration >=the 150g/L of 2# slot, Sour 75-80 DEG C of temperature, total acidity g/L total acidity >=190g/L;It is required that acid cleaning process speed is not less than 50m/min.
Rinsing process: belt steel surface Cl is washed off-Ion and impurity guarantee the cleannes of belt steel surface.Belt steel surface residual Cl-Ion makes belt steel surface turn to be yellow, Zinc attachability when seriously affecting zinc-plated, while generating lacking for pitted skin on galvanizing production surface It falls into, rinsing process is 5 grades of rinsing sections: the conductivity (μ s/cm) < 100 of 5 grades of rinsing sections;PH value: > 5;45-60 DEG C of coolant-temperature gage;Drift It washes a section water flow and is set as 6m3/h。
5, smooth: since ESP raw material plate shape is poor, to guarantee belt plate shape before zinc pot, to increase by one before entering galvanizing furnace A planisher, it is ensured that belt plate shape, and belt steel surface roughness is controlled by working roll roughness.Single devices elongation percentage 1.3%.
6, heat: induction heater is heated using induction coil, and 500~550 DEG C of heating temperature, this process strip does not occur Recrystallization.Furnace atmosphere pressure (0.4 ± 0.05) mbar;Oxygen content :≤200ppm;Hydrogen ratio: (5-10) %.Followed by hot Room by electric radiant tube give strip heat preservation, 450 DEG C of maximum temperature, control at 410~450 DEG C, give strip heat preservation, guarantee strip into Enter before zinc pot in certain temperature range.
7, zinc-plated in galvanized pot: to enter 480~520 DEG C of pot temperature, zinc liquid temperature: 465 ± 5 DEG C;Carry out spangle control: zinc pot Interior Composition Control are as follows: Al 0.20~0.26%;Sb 0.09~0.13%;Cd≤0.03%;Fe≤0.03%.It utilizes later Air knife apparatus from belt steel surface blows zinc off, realizes different zinc coating thickness, and air knife parameter is according to the control of zinc layers requirements automation System.
8, cooling: cooling tower top: temperature≤250 DEG C, water quenching outlet: temperature≤50 DEG C.
9, straightening: hot radical slab Zincing passivation, slab Strip Shape Control is poor, easily causes applicator roll and strip contact force uneven It is even, it causes passivating film uneven, influences the corrosion resistance of galvanized sheet.Straightening process single devices elongation percentage 0.8%.For control Zinc-plated slab plate shape breaks phosphorus to producing line, smooth, withdrawal straightening stands elongation percentage optimizes.Control scale breading, smooth, straightening are always prolonged Rate is stretched 2.9%.
The step of embodiment 1 is not addressed is consistent with parameter control group, namely consistent with the prior art, belongs to common knowledge, It grasps, therefore is not repeated for those skilled in the art.
The technical solution of embodiment 1 is by process modification, without cold-rolling treatment, recrystallization annealing after pickling, but it is straight The smooth rear Zincing passivation processing of row is tapped into, product quality fully achieves traditional technology requirement.Same product quality, but It is to save processing step and time, reduces equipment and buy and production cost, there is great economic value.
Embodiment 2
Hot rolling raw material are as follows: ESP hot rolling raw material, 4.0mm, width 1250mm;DX51D+Z.Embodiment 2 belongs to prioritization scheme, Between the cooling and straightening process of embodiment 1, finishing process is increased.Polishing machine single devices elongation percentage 1.3%.Further Improve the roughness of plate shape and zinc-plated plate surface.
Specifically: hot rolling raw material → uncoiling → welding machine → broken phosphorus → pickling and rinsing → smooth → induction plus stove heating (band Steel does not recrystallize) → zinc-plated → cooling → finishing → straightening → → Passivation Treatment → dry → batch → finished product.
Embodiment 1 is not finishing product, and embodiment 2 is finishing product, parameter of two different products in terms of extension Control is referring to following table:
It should be understood that plate before equipment (scale breading+smooth) can modify range be ± 0.2%, breaking elongation be no more than ± 0.4%.
3 process of embodiment is same as Example 1.
4 process of embodiment is same as Example 2.
Examples 1 to 4 state modulator is shown in parameter list.
Each embodiment extension parameter list
At present by the hot dip zinc product of the Examples 1 to 4 of this technique production:
1, product mechanical performance: in 290-320MPa, tensile strength exists the hot dip zinc product yield strength of Examples 1 to 4 380-420MPa, elongation percentage are greater than 26%, and good mechanical performance is similar with two control group performances.
2, zinc-plated effect: the smog experiment in neutral 72 hours of each embodiment group is qualified, and white rust area≤5%, can meet Professional standard.
The technical solution of the present patent application by equipment and process modification, for the substrate process before passivation carry out improvement and Parameter coordination without cold-rolling treatment, recrystallization annealing after pickling, but directly carries out smooth rear zinc-plated processing, product matter Amount fully achieves traditional technology requirement.Same product quality, but processing step and time are saved, reduce equipment It buys and production cost, there is great economic value.
It should be noted that specific embodiment of the invention is to the present invention have been described in detail, for ability For the technical staff in domain, its various of progress is obviously changed without departing from the spirit and scope of the present invention Become all within protection scope of the present invention.

Claims (5)

1. a kind of process for producing think gauge hot substrate and having colored galvanizing production, which is characterized in that processing step includes hot rolling Raw material → uncoiling → welding machine → broken phosphorus → pickling and → smooth → induction of rinsing plus stove heating → zinc-plated → cooling → straightening → blunt → finished product is batched in change processing → drying →;Wherein, induction plus stove heating are heated using induction coil, heating temperature 500~550 DEG C, this process strip does not recrystallize;It is zinc-plated in galvanized pot: to enter 480-520 DEG C of pot temperature, zinc liquid temperature: 465 ± 5 DEG C;Control Scale breading processed, smooth, straightening breaking elongation are 2.9 ± 0.4%.
2. a kind of process for producing think gauge hot substrate and having colored galvanizing production according to claim 1, feature exist In: the sum of the scale breading, smooth equipment elongation percentage are 2.1 ± 0.2%.
3. a kind of process for producing think gauge hot substrate and having colored galvanizing production according to claim 2, feature exist In: the broken phosphorus machine single devices elongation percentage 0.8%.
4. a kind of process for producing think gauge hot substrate and having colored galvanizing production according to claim 1, feature exist In: the acid cleaning process includes two descaling baths, and rinsing process is 5 grades of rinsing sections.
5. a kind of process for producing think gauge hot substrate and having colored galvanizing production according to claim 1, feature exist In: the Composition Control in the zinc pot are as follows: Al 0.20~0.26%;Sb 0.09~0.13%;Cd≤0.03%;Fe≤ 0.03%.
CN201910819733.0A 2019-08-31 2019-08-31 A kind of process and its equipment for producing think gauge hot substrate and having colored galvanizing production Pending CN110359001A (en)

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Cited By (3)

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CN111621730A (en) * 2020-05-28 2020-09-04 天津市宇润德金属制品有限公司 Efficient steel plate galvanizing production line and application thereof
CN112281079A (en) * 2020-09-25 2021-01-29 河钢股份有限公司承德分公司 Hot-base galvanized steel coil and preparation method thereof
CN112813233A (en) * 2019-11-16 2021-05-18 上海梅山钢铁股份有限公司 Hot galvanizing strip steel temperature transition method

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