CN110093563A - A kind of the enamel cold-rolled steel sheet and its production method of deep-draw purposes - Google Patents
A kind of the enamel cold-rolled steel sheet and its production method of deep-draw purposes Download PDFInfo
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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Abstract
The invention discloses a kind of enamel cold-rolled steel sheet of deep-draw purposes and its production methods, belong to metal material field.Mn element mass percent is 0.10~0.30% in enamel cold-rolled steel sheet of the invention, and N, B element mass percent are N:0.0050~0.0120%；B:0.0030~0.0090%；And the relationship between N/B >=1.5, C, Ti, S, N and B element weight percent is 0≤4.43B+Ti-3.42N-1.5S-4C≤0.020.The enamel cold-rolled steel sheet of deep-draw purposes of the invention, 170~240MPa of yield strength, tensile strength 320~380MPa, A50Elongation percentage >=40%, n value >=0.20, r value >=1.7, tissue are mainly ferrite, and grain size number is 9.0~10.0, have excellent fish scaling resistance and adhesion property.
Description
Technical field
The present invention relates to metal material fields, a kind of enamel cold-rolled steel sheet more specifically to deep-draw purposes and
Its production method
Background technique
Enamelled pressed steel, refer to it is a kind of by unorganic glass material by melting coagulate in matrix steel plate and with steel plate be firmly combined
Advanced composite material (ACM) together.Surface of steel plate carry out the enamel application of slip can prevent steel plate from getting rusty, make steel plate when heated not
As for forming oxide layer on surface and the erosions of various liquid can be resisted.Enamelware is not only safe and non-toxic, is easy to wash
Only, it can be widely used as ware and washing implement used in daily life, and under given conditions, enamel applies
The excellent performances such as hardness height, high temperature resistant, the wear-resisting and insulating effect shown on metal body are warded off, there is enamelware
More extensive purposes.With the continuous progress of technology, requirement of the Enamel Industry to steel plate is higher and higher.Common cold-rolled steel sheet exists
The defects of squama is quick-fried, adherence is bad is often generated during enamel, is unable to satisfy enamel quality.With common cold-rolled steel sheet phase
Than cold rolling enamelled pressed steel requires comprehensive performance more excellent.
But the method for not preparing cold rolling enamelled pressed steel exclusively by reasonable Design of Chemical Composition in the prior art,
The method for especially molten steel continuous casting process being cooperated to handle cold rolling enamelled pressed steel, so that the fish scaling resistance of cold rolling glassed steel
Meet production and requirement with adhesion property.Therefore, need to invent a kind of production of the enamel cold-rolled steel sheet of deep-draw purposes
Method so that having excellent fish scaling resistance and adhesion property after product enamel, and then promotes the efficient money of cold rolling glassed steel
Sourceization application.
Through retrieving, the title of innovation and creation are as follows: be suitable for the boracic cold rolling glassed steel and its manufacturing method of continuous annealing production
(number of patent application: CN105177411A, the applying date: 2015-12-23), this application discloses a kind of suitable continuous annealing is raw
The boracic cold rolling glassed steel and its manufacturing method of production, the steel chemical composition mass percent are as follows: C 0.03~0.05%；Si≤
0.02%；Mn 0.20~0.40%；P≤0.020%；S 0.020~0.035%；Als 0.020~0.07%；B 0.0010
~0.0020%；N 0.0020~0.0060%；Surplus is Fe and inevitable impurity.It can be used for thin gauge water heater liner
With the decoration panel of subway, tunnel, 200~240MPa of yield strength, 290~340MPa of tensile strength, elongation percentage 38~44%,
Hardenability value n value is greater than 0.20, average plastic strain ratio rmValue is greater than 1.6,1mm thick steel plate hydrogen lag time greater than 50min, wards off
Do not occur that squama is quick-fried, and enamel adhesion property is up to state standards after porcelain.The shortcoming of present application is: in boracic cold rolling glassed steel
C element and Mn constituent content it is higher, reduce boracic cold rolling glassed steel processability.
Summary of the invention
1, it to solve the problems, such as
For in the prior art, for common cold-rolled steel sheet during enamel, fish scaling resistance and adhesion property cannot be complete
The problem of meeting the requirements entirely, the present invention provide a kind of production method of the enamel cold-rolled steel sheet of deep-draw purposes, are formed in steel plate
" catching hydrogen " trap based on the compound and BN of appropriate Ti, supplemented by the field trashes such as MnS, so that the cold-rolled steel sheet after enamel has
There are excellent fish scaling resistance and adhesion property.
2, technical solution
To solve the above problems, the present invention adopts the following technical scheme that.
A kind of enamel cold-rolled steel sheet of deep-draw purposes of the invention, in steel Mn element mass percent be 0.10~
0.30%, and N, B element mass percent are N:0.0050~0.0120%；B:0.0030~0.0090%；And N/B >=1.5.
Preferably, C, Ti and S element mass percent be C≤0.005%, Ti:0.030~0.060%, S:0.010~
0.030%.
Preferably, in cold-rolled steel sheet each chemical element according to following mass percent: C≤0.005%；Si≤0.05%；
Mn:0.10~0.30%；P:0.040~0.060%；S:0.010~0.030%；Als:0.010~0.060%；Ti:0.030
~0.060%；N:0.0050~0.0120%；B:0.0030~0.0090%, surplus are iron and inevitable impurity.
Preferably, the relationship between C, Ti, S, N and B element weight percent is 0≤4.43B+Ti-3.42N-1.5S-4C
≤0.020。
The production method of the enamel cold-rolled steel sheet of a kind of deep-draw purposes of the invention, the specific steps are as follows: Step 1: iron
Water pretreatment skims before progress and skims with after；Step 2: converter smelting, is not added the pig iron, slag steel；It is tapped using self-loopa steel scrap,
Strengthen converter dephosphorization, reinforces pushing off the slag operation；Tapping process adds lime, without deoxidation；Step 3: alloy is finely tuned, alloy fine tuning
In the process control steel in Mn element mass percent be 0.10~0.30%, and N, B element mass percent be N:0.0050~
0.0120%；B:0.0030~0.0090%；And N/B >=1.5；Step 4: RH furnace refines, the net circulation time is not less than 6min；
Step 5: continuous casting and hot rolling, and the temperature control that slab is come out of the stove is T1=1200~1220 DEG C；Step 6: pickling；Step 7:
Cold rolling；Step 8: annealing, the annealing way is continuous annealing or bell-type annealing；Step 9: smooth.
Preferably, in step 5 continuous casting and hot rolling specifically, finishing temperature control be T2=0.73~0.77T1, same to time control
Coiling temperature processed is T3=0.65~0.79T2.
Preferably, C, Ti and S element mass percent be C≤0.005%, Ti:0.030~0.060%, S:0.010~
0.030%.
Preferably, the relationship between C, Ti, S, N and B element weight percent is 0≤4.43B+Ti-3.42N-1.5S-4C
≤0.020。
Preferably, annealing way is continuous annealing in step 8, and the soaking temperature of continuous annealing is 800~840 DEG C, soaking
Section 50~100s of heating time, 360~400 DEG C of overaging temperature, 4~8min of overaging time.
Preferably, annealing way is bell-type annealing in step 8, the bringing-up section heating rate of bell-type annealing is 30~80 DEG C/
H, 650~690 DEG C of cold-point temperature, 5~9h of heating time, 30~80 DEG C/h of cooling section rate, 360~400 DEG C keep the temperature 2~
4h。
3, beneficial effect
Compared with the prior art, the invention has the benefit that
(1) the enamel cold-rolled steel sheet of a kind of deep-draw purposes of the invention, 170~240MPa of yield strength, tensile strength
320~380MPa, A50Elongation percentage >=40%, n value >=0.20, r value >=1.7, tissue are mainly ferrite, and grain size number is
9.0~10.0, hydrogen time of penetration >=20min after product enamel, has excellent fish scaling resistance and adhesion property；
(2) production method of the enamel cold-rolled steel sheet of a kind of deep-draw purposes of the invention using low-carbon, a small amount of Ti and is fitted
The component system for measuring N, B is cooperated reasonable technique, is formed in steel plate and be mingled with based on the compound and BN of appropriate Ti, with MnS etc.
" catching hydrogen " trap supplemented by object can reduce the difficulty of continuous casting, while strengthen the intensity for improving steel plate by P element.
Detailed description of the invention
Fig. 1 is macroscopical picture after 1 enamel firing of embodiment；
Fig. 2 is macroscopical picture after 1 enamel firing of comparative example；
Fig. 3 is the metallographic structure of embodiment steel plate；
Fig. 4 is a kind of flow chart of the production method of the enamel cold-rolled steel sheet of deep-draw purposes of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments；Moreover, be not between each embodiment it is relatively independent, according to
It needs can be combined with each other, to reach more preferably effect.Therefore, below to the embodiment of the present invention provided in the accompanying drawings
Detailed description is not intended to limit the range of claimed invention, but is merely representative of selected embodiment of the invention.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
To further appreciate that the contents of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
A kind of enamel cold-rolled steel sheet of deep-draw purposes of the invention, the enamel cold-rolled steel sheet of the deep-draw purposes according to
Mass percent contains C≤0.005%；Si≤0.05%；Mn:0.10~0.30%；P:0.040~0.060%；S:0.010
~0.030%；Als:0.010~0.060%；Ti:0.030~0.060%；N:0.0050~0.0120%；B:0.0030~
0.0090%, surplus is iron and inevitable impurity.
It should be noted that N element can improve the intensity of steel in enamel cold-rolled steel sheet of the invention, reduces enamel and use
The low-temperature flexibility of cold-rolled steel sheet increases aging sensitivity performance, while N element can form Ti's with the Ti element in steel plate, B element
The fish scaling resistance of steel plate can be improved in compound and BN, the compound and BN that form Ti.N percentage composition controls model in the present invention
Enclose is 0.0050~0.0120%.And B element passes through and N element combines and forms BN, displaced AlN can improve enamel cold rolling
The press formability of steel plate and the scaling resistance for improving enamel cold-rolled steel sheet.If the B element in enamel cold-rolled steel sheet contains
Measure it is too low, cannot with N element combine form BN so that the scaling resistance of enamel cold-rolled steel sheet reduces；And B element content mistake
Height, and will lead to superfluous B element there are can reduce press formability in steel with solution.It is determined after measuring, this
B percentage composition control range is 0.0030~0.0090% in invention, further, limits the percentage between N element and B element
Content are as follows: N/B >=1.5.
It is worth noting that the ratio between B, Ti, N, S, C element weight percent is 0≤4.43B+Ti-3.42N-
1.5S-4C≤0.020, and when N/B >=1.5, a kind of fish scaling resistance of the enamel cold-rolled steel sheet of deep-draw purposes of the invention
It is optimal with adhesion property.C element is to improve that enamel cold-rolled steel sheet intensity is most economical and most effective solution strengthening element, works as steel
When C element content in plate increases, the pearlite of formation increases, and intensity increases, but the plasticity of steel and formability reduce, and butt welding
Connecing property is unfavorable, therefore also to avoid the drawbacks of bringing because of C element too high levels, prevents from generating a large amount of gas during enamel firing
Bubble, caused by there is needle pore defect after enamel firing.The Mn element in S element and steel plate in enamel cold-rolled steel sheet of the invention
MnS can be formed with chemical combination, it is good storage hydrogen trap that MnS, which is a kind of field trash that plasticity is excellent, quick-fried to the anti-squama for improving steel plate
Performance is highly beneficial, when the S element in steel plate gets equilibrium valve, the welding performance of steel plate and the adhesion property after enamelling sheet steel
It is all up optimal.
In addition, current cold rolling glassed steel mainly on the basis of mild steel, passes through the enough Ti Element generation Ti of addition
Compound so that " catching hydrogen " trap in steel plate increases, to improve the fish scaling resistance of steel plate.On the one hand, cold rolling is produced
When glassed steel, using affinity stronger between Ti element and C element, N element, C element and S element etc. generate TiN, Ti
(CN)、Ti4C2S2Or the stable type compound of TiS etc, it avoids and is generated due to the compound of generation decomposes at a temperature of enamel firing
Adverse effect, can both prevent CO, CO during enamel firing2The generation of equal gases, and enamel cold-rolled steel sheet can be reduced
The defects of porcelain facing pin hole, bubble.The stable type compound that Ti and S are formed can also make steel steel desulfurization, reduce the presence of S element and band
The drawback come.On the other hand, when the Ti constituent content in enamel cold-rolled steel sheet is excessively high, it will lead to steel plate adherence variation,
Compound (such as TiN, Ti (CN), Ti of the excessive Ti generated simultaneously4C2S2Or TiS) it will lead to the mouth of a river in continuous casting process " dross "
With crystallizer " agglomeration ", continuous production efficiency and production safety are influenced；Compound volume that Ti is formed in steelmaking process (with
MnS is compared with fine foreign matters such as BN) it is bigger than normal, unit volume " the catching hydrogen " efficiency also resulted in enamel cold-rolled steel sheet is inclined
It is low.
Therefore, the enamel cold-rolled steel sheet of a kind of deep-draw purposes of the invention, by using low-carbon, a small amount of Ti and appropriate N,
B element, Ti element, N element, S element, C element are passed through above-mentioned the constraint relationship: 0≤4.43B+Ti- by the component system of B
3.42N-1.5S-4C≤0.020 is matched, and is pressed from both sides based on the compound and BN of appropriate Ti, with MnS etc. so that being formed in steel plate
" catching hydrogen " trap supplemented by sundries so that having excellent fish scaling resistance and adhesion property after enamel, and reduces continuous casting
The difficulty of production.
Further, the enamel cold-rolled steel sheet of a kind of deep-draw purposes of the invention, the effect of some other chemical element
It is based primarily upon following principle:
Si:Si constituent content is excessively high, and steel surface iron oxide scale is not easy to remove, and surface is easy to form since oxide is pressed into
Micro-crack, and then easily lead to steel plate in cold forming process as formation of crack and crack.Therefore Si percentage composition control in the present invention
Range processed is≤0.05%.
Mn:Mn element can reduce austenite be transformed into ferritic phase transition temperature (can just make up because C element content drop
Low bring austenite is transformed into ferritic phase transition temperature and increases), expand hot processing temperature range, is conducive to fining ferrite
Crystallite dimension, but Mn too high levels, slab Mn degree of segregation in continuous casting process increase, and steel plate thickness centre easily forms pearl
The banded structure of body of light or bainite, it is all unfavorable to plasticity, welding performance, fatigue behaviour.Comprehensively consider, Mn percentage in the present invention
Content control range is 0.10~0.30%.
P:P element is added in steel as alloying element, plays solution strengthening effect, can strengthen the intensity for improving steel plate, together
When also have a pinning effect to dislocation motion by assembling on dislocation line, and Grain Refinement Effect after recrystallization can significantly improve intensity,
The fish scaling resistance that " catching hydrogen " trap improves steel can be increased simultaneously.But diffusion velocity of the P in γ-Fe and α-Fe is small, easy shape
At segregation, excessive P can obviously deteriorate steel formability performance, low-temperature impact toughness and welding performance.Comprehensively consider, in the present invention
P percentage composition control range is 0.040~0.060%.
Al:Al element is as main deoxidier, while aluminium also has certain effect to refinement crystal grain.The shortcomings that aluminium is to influence steel
Hot-working character, welding performance and cutting performance.In the present invention Als percentage composition control range be 0.010~
0.060%.
The present invention also provides the production method (as shown in Figure 4) of the enamel cold-rolled steel sheet of the deep-draw purposes, tools
Steps are as follows for body:
Step 1: molten iron pre-processes, skims before progress and skim with after；
Step 2: converter smelting, is not added the pig iron, slag steel；It is tapped using self-loopa steel scrap, strengthens converter dephosphorization, reinforce gear
Slag operation；Tapping process adds lime, without deoxidation；
Step 3: alloy is finely tuned, it is 0.10~0.30% that Mn element mass percent in steel is controlled in alloy trim process,
And N, B element mass percent are N:0.0050~0.0120%；B:0.0030~0.0090%；And N/B >=1.5；
Step 4: RH furnace refines, RH is then blown according to temperature and oxygen position in the prometaphase using light treatment process if you need to oxygen blast
Enter oxygen；The broken unprecedented guarantee net circulation time is not less than 6min；
Step 5: continuous casting and hot rolling, and the temperature control come out of the stove of slab is T1=1200~1220 DEG C, and finishing temperature control
It is made as T2=0.73~0.77T1, control coiling temperature is T3=0.65~0.79T2, i.e., finishing temperature control is T2=890 DEG C
~920 DEG C, oiler temperature control is T3=600 DEG C~700 DEG C；
Step 6: pickling；
Step 7: cold rolling, cold rolling total reduction is controlled 75~85%；
Step 8: annealing, the annealing way is continuous annealing or bell-type annealing
(1) when annealing way is continuous annealing, the soaking temperature of continuous annealing is 800~840 DEG C, when soaking zone heats
Between 50~100s, 360~400 DEG C of overaging temperature, 4~8min of overaging time；；
(2) when annealing way is bell-type annealing, the bringing-up section heating rate of bell-type annealing is 30~80 DEG C/h, cold spot temperature
650~690 DEG C, 5~9h of heating time, 30~80 DEG C/h of cooling section rate of degree, in 360~400 DEG C of 2~4h of heat preservation；
Step 9: smooth, smooth elongation control is 0.8~1.6%.
It is worth noting that cold in the slab tapping temperature, finishing temperature of hot rolling, coiling temperature and step 7 in step 5
The reasonable cooperation of total reduction is rolled, so that the fish scaling resistance of steel plate and mechanical property obtain optimal comprehensive performance matching.Its
In, slab tapping temperature is controlled at 1200~1220 DEG C, it is ensured that the bulky grain precipitate back dissolving that part Ti is precipitated in high-temperature region,
Be conducive to subsequent rolling or it is cold rolled annealed during be precipitated tiny particle (particle of bulky grain on the toughness of steel influence compared with
Greatly), so improve steel fish scaling resistance, while also improve steel toughness；Finishing temperature control is in 890~920 DEG C of (Ar3 phases
It is more than height), evade it and rolled in two-phase section, avoids the formation of mixed grain structure, and then mixed grain structure is prevented seriously to reduce steel
Forming property, so that the glassed steel of preparation obtains good forming property (ensuring to obtain preferable r value and n value)；Coiling temperature
It is 600 DEG C~700 DEG C, it is ensured that the structural state of steel and the ratio of precipitation particles provide good standard for subsequent cold rolled annealed process
It is standby, it is ensured that a large amount of tiny precipitation particles are precipitated during cold rolling is stepped back.Compared with prior art, when oiler temperature control exists
At 600~700 DEG C, the fish scaling resistance of enamel cold-rolled steel sheet of the invention is more preferable.
Cold rolling total reduction control of the invention is 75~85%, if steel billet carries out cold rolling, cold rolling reduction ratio is too low,
The plastic strain ratio that will lead to steel plate is relatively low；Reduction ratio is excessively high, but can because roll-force is excessive to produce it is unstable therefore total
Reduction ratio is conducive to improve the mechanical property of steel plate when being 75~85%, especially for raising product plastic strain ratio (r value)
Obviously.In short, the control of tapping temperature, finishing temperature, coiling temperature and cold rolling total reduction can be made this in above range
A kind of enamel of deep-draw purposes of the invention of invention cold-rolled steel sheet obtains good and matched comprehensive performance.
Embodiment 1
A kind of enamel cold-rolled steel sheet of deep-draw purposes of the invention, cold-rolled steel sheet main chemical compositions in the present embodiment
Mass percent are as follows: C=0.001%, Si=0.045%, Mn=0.25%, P=0.040%, S=0.025%, Als=
0.010%, Ti=0.045%, N=0.0050%, B=0.0033%, N/B=1.51 (as shown in table 1).In addition, of the invention
A kind of deep-draw purposes enamel cold-rolled steel sheet production method, specific process parameter is following (such as 2 institute of table in the present embodiment
Show): slab tapping temperature is 1200 DEG C；Finishing temperature is 890 DEG C；Coiling temperature is 655 DEG C；Cold rolling reduction ratio is 76.2%；
It is annealed into continuous annealing, soaking temperature is 840 DEG C, soaking time 50s；Overaging temperature is 360 DEG C, and the overaging time is
4min；Smooth elongation percentage 0.8%.Performance according to technological parameter steel plate produced is as follows:
Yield strength is 235MPa, tensile strength 365MPa, A50Elongation percentage is greater than 44.5%, the plastic strain ratio of steel plate
N=0.220, the work-hardening exponential r=1.98 of steel plate, hydrogen time of penetration are 25min.
As shown in connection with fig. 1, the steel plate of the present embodiment production carries out enamel after over cleaning post-processes, and glaze is quick using enamel
Powder is felt, using single or double enamel.The grading of enamelled pressed steel adhesion property: A is very excellent, B is excellent, C is more excellent, D is general, E
It is problematic.The enamel technology of the present embodiment is single side enamel, and adhesion property is A grades, and no squama is quick-fried (as shown in table 3).
Embodiment 2
The mass percent of cold-rolled steel sheet main chemical compositions in the present embodiment are as follows: C=0.004%, Si=0.005%,
Mn=0.10%, P=0.060%, S=0.012%, Als=0.060%, Ti=0.060%, N=0.0115%, B=
0.0065%, N/B=1.76 (as shown in table 1).In addition, a kind of production of the enamel cold-rolled steel sheet of deep-draw purposes of the invention
Method, specific process parameter is following (as shown in table 2) in the present embodiment: slab tapping temperature is 1220 DEG C；Finishing temperature is 920
℃；Coiling temperature is 700 DEG C；Cold rolling reduction ratio is 84.7%；It is annealed into continuous annealing, soaking temperature is 800 DEG C, soaking time
For 100s；Overaging temperature is 400 DEG C, and the overaging time is 8min；Smooth elongation percentage 1.2%.It is given birth to according to the technological parameter
The performance of the steel plate of production is as follows:
Yield strength is 224MPa, tensile strength 358MPa, A50Elongation percentage is greater than 44.0%, the plastic strain ratio of steel plate
N=0.213, the work-hardening exponential r=2.13 of steel plate, hydrogen time of penetration are 22min.
The steel plate of the present embodiment production carries out enamel after over cleaning post-processes, and glaze uses enamel sensitivity powder, using list
Face or counterenamel.The grading of enamelled pressed steel adhesion property: A is very excellent, B is excellent, C is more excellent, D is general, E is problematic.This reality
The enamel technology for applying example is counterenamel, and adhesion property is A grades, and no squama is quick-fried (as shown in table 3).
Embodiment 3
A kind of enamel cold-rolled steel sheet of deep-draw purposes of the invention, cold-rolled steel sheet main chemical compositions in the present embodiment
Mass percent are as follows: C=0.001%, Si=0.045%, Mn=0.25%, P=0.040%, S=0.025%, Als=
0.010%, Ti=0.045%, N=0.0050%, B=0.0033%, N/B=1.51 (as shown in table 1).In addition, of the invention
A kind of deep-draw purposes enamel cold-rolled steel sheet production method, specific process parameter is following (such as 2 institute of table in the present embodiment
Show): slab tapping temperature is 1200 DEG C；Finishing temperature is 917 DEG C；Coiling temperature is 645 DEG C；Cold rolling reduction ratio is 75.9%；
It is annealed into bell-type annealing, 80 DEG C/h of bringing-up section heating rate, 650 DEG C of cold-point temperature, heating time 9h, 30 DEG C of cooling section rate/
H, in 360 DEG C of heat preservation 4h；Smooth elongation percentage 1.0%.Performance according to technological parameter steel plate produced is as follows:
Yield strength is 205MPa, tensile strength 355MPa, A50Elongation percentage is greater than 42.5%, the plastic strain ratio of steel plate
N=0.228, the work-hardening exponential r=2.07 of steel plate, hydrogen time of penetration are 24min.
The steel plate of the present embodiment production carries out enamel after over cleaning post-processes, and glaze uses enamel sensitivity powder, using list
Face or counterenamel.The grading of enamelled pressed steel adhesion property: A is very excellent, B is excellent, C is more excellent, D is general, E is problematic.This reality
The enamel technology for applying example is single side enamel, and adhesion property is A grades, and no squama is quick-fried (as shown in table 3).
Embodiment 4
A kind of enamel cold-rolled steel sheet of deep-draw purposes of the invention, cold-rolled steel sheet main chemical compositions in the present embodiment
Mass percent are as follows: C=0.004%, Si=0.005%, Mn=0.10%, P=0.060%, S=0.012%, Als=
0.060%, Ti=0.060%, N=0.0115%, B=0.0065%, N/B=1.76 (as shown in table 1).In addition, of the invention
A kind of deep-draw purposes enamel cold-rolled steel sheet production method, specific process parameter is following (such as 2 institute of table in the present embodiment
Show): slab tapping temperature is 1220 DEG C；Finishing temperature is 892 DEG C；Coiling temperature is 600 DEG C；Cold rolling reduction ratio is 84.1%；
It is annealed into bell-type annealing, 30 DEG C/h of bringing-up section heating rate, 690 DEG C of cold-point temperature, heating time 5h, 80 DEG C of cooling section rate/
H, in 400 DEG C of heat preservation 2h；Smooth elongation percentage 1.6%.Performance according to technological parameter steel plate produced is as follows:
Yield strength is 178MPa, tensile strength 342MPa, A50Elongation percentage is greater than 46.5%, the plastic strain ratio of steel plate
N=0.233, the work-hardening exponential r=2.28 of steel plate, hydrogen time of penetration are 28min.
The steel plate of the present embodiment production carries out enamel after over cleaning post-processes, and glaze uses enamel sensitivity powder, using list
Face or counterenamel.The grading of enamelled pressed steel adhesion property: A is very excellent, B is excellent, C is more excellent, D is general, E is problematic.This reality
The enamel technology for applying example is counterenamel, and adhesion property is A grades, and no squama is quick-fried (as shown in table 3).
It is worth noting that as shown in figure 3, the metallographic structure of above-described embodiment is mainly ferrite, grain size number
9.0 containing a large amount of fine foreign matters.
Comparative example 1
The mass percent of cold-rolled steel sheet main chemical compositions in this comparative example are as follows: C=0.008%, Si=0.010%,
Mn=0.15%, P=0.042%, S=0.008%, Als=0.028%, Ti=0.010%, N=0.0035%, B=
0.0015%, N/B=2.33 (as shown in table 1).In addition, a kind of production of the enamel cold-rolled steel sheet of deep-draw purposes of the invention
Method, specific process parameter is following (as shown in table 2) in this comparative example: slab tapping temperature is 1180 DEG C；Finishing temperature is 875
℃；Coiling temperature is 590 DEG C；Cold rolling reduction ratio is 65.2%；It is annealed into continuous annealing, soaking temperature is 850 DEG C, soaking time
For 40s；Overaging temperature is 360 DEG C, and the overaging time is 3.2min；Smooth elongation percentage 1.4%.It is given birth to according to the technological parameter
The performance of the steel plate of production is as follows:
Yield strength is 153MPa, tensile strength 296MPa, A50Elongation percentage is greater than 47.5%, the plastic strain ratio of steel plate
N=0.250, the work-hardening exponential r=2.65 of steel plate, hydrogen time of penetration are 5min.
As shown in connection with fig. 2, the steel plate of this comparative example production carries out enamel after over cleaning post-processes, and glaze is quick using enamel
Powder is felt, using single or double enamel.The grading of enamelled pressed steel adhesion property: A is very excellent, B is excellent, C is more excellent, D is general, E
It is problematic.The enamel technology of this comparative example is counterenamel, and adhesion property is B grades, and local squama is quick-fried (as shown in table 3).
Comparative example 2
The mass percent of cold-rolled steel sheet main chemical compositions in this comparative example are as follows: C=0.015%, Si=0.020%,
Mn=0.32%, P=0.069%, S=0.028%, Als=0.042%, Ti=0.068%, N=0.0088%, B=
0.0052%, N/B=1.69 (as shown in table 1).In addition, a kind of production of the enamel cold-rolled steel sheet of deep-draw purposes of the invention
Method, specific work parameter is following (as shown in table 2) in this comparative example: slab tapping temperature is 1220 DEG C；Finishing temperature is 880
℃；Coiling temperature is 595 DEG C；Cold rolling reduction ratio is 70.1%；It is annealed into continuous annealing, soaking temperature is 780 DEG C, soaking time
For 40s；Overaging temperature is 400 DEG C, and the overaging time is 3.2min；Smooth elongation percentage 1.0%.It is given birth to according to the technological parameter
The performance of the steel plate of production is as follows:
Yield strength is 254MPa, tensile strength 413MPa, A50Elongation percentage is greater than 35.0%, the plastic strain ratio of steel plate
N=0.210, the work-hardening exponential r=1.55 of steel plate, hydrogen time of penetration are 9min.
The steel plate of this comparative example production carries out enamel after over cleaning post-processes, and glaze uses enamel sensitivity powder, using list
Face or counterenamel.The grading of enamelled pressed steel adhesion property: A is very excellent, B is excellent, C is more excellent, D is general, E is problematic.This is right
The enamel technology of ratio is counterenamel, and adhesion property is C grades, and no squama is quick-fried (as shown in table 3).
Comparative example 3
The mass percent of cold-rolled steel sheet main chemical compositions in this comparative example are as follows: C=0.008%, Si=0.010%,
Mn=0.15%, P=0.042%, S=0.008%, Als=0.028%, Ti=0.010%, N=0.0035%, B=
0.0015%, N/B=2.33 (as shown in table 1).In addition, a kind of production of the enamel cold-rolled steel sheet of deep-draw purposes of the invention
Method, specific process parameter is following (as shown in table 2) in this comparative example: slab tapping temperature is 1200 DEG C；Finishing temperature is 875
℃；Coiling temperature is 590 DEG C；Cold rolling reduction ratio is 65.7%；It is annealed into bell-type annealing, bringing-up section heating rate 80 DEG C/h is cold
680 DEG C of temperature, heating time 4h, 30 DEG C/h of cooling section rate of point, in 360 DEG C of heat preservation 1h；Smooth elongation percentage 1.2%.According to this
The performance of technological parameter steel plate produced is as follows:
Yield strength is 136MPa, tensile strength 287MPa, A50Elongation percentage is greater than 51.0%, the plastic strain ratio of steel plate
N=0.263, the work-hardening exponential r=2.50 of steel plate, hydrogen time of penetration are 5min.
The steel plate of this comparative example production carries out enamel after over cleaning post-processes, and glaze uses enamel sensitivity powder, using list
Face or counterenamel.The grading of enamelled pressed steel adhesion property: A is very excellent, B is excellent, C is more excellent, D is general, E is problematic.This is right
The enamel technology of ratio is counterenamel, and adhesion property is B grades, and local squama is quick-fried (as shown in table 3).
Comparative example 4
The mass percent of cold-rolled steel sheet main chemical compositions in this comparative example are as follows: C=0.015%, Si=0.020%,
Mn=0.32%, P=0.069%, S=0.028%, Als=0.042%, Ti=0.068%, N=0.0088%, B=
0.0052%, N/B=1.69 (as shown in table 1).In addition, a kind of production of the enamel cold-rolled steel sheet of deep-draw purposes of the invention
Method, specific work parameter is following (as shown in table 2) in this comparative example: slab tapping temperature is 1220 DEG C；Finishing temperature is 880
℃；Coiling temperature is 595 DEG C；Cold rolling reduction ratio is 70.0%；It is annealed into bell-type annealing, bringing-up section heating rate 30 DEG C/h is cold
640 DEG C of temperature, heating time 4h, 80 DEG C/h of cooling section rate of point, in 400 DEG C of heat preservation 2h；Smooth elongation percentage 1.2%.According to this
The performance of technological parameter steel plate produced is as follows:
Yield strength is 243MPa, tensile strength 378MPa, A50Elongation percentage is greater than 39.0%, the plastic strain ratio of steel plate
N=0.205, the work-hardening exponential r=1.60 of steel plate, hydrogen time of penetration are 12min.
The steel plate of this comparative example production carries out enamel after over cleaning post-processes, and glaze uses enamel sensitivity powder, using list
Face or counterenamel.The grading of enamelled pressed steel adhesion property: A is very excellent, B is excellent, C is more excellent, D is general, E is problematic.This is right
The enamel technology of ratio is counterenamel, and adhesion property is B grades, and no squama is quick-fried (as shown in table 3).
The chemical component of the enamel cold-rolled steel sheet of deep-draw purposes in each embodiment and comparative example is as shown in table 1:
The chemical component of the enamel cold-rolled steel sheet of deep-draw purposes in each embodiment of table 1 and comparative example, wt%
After steel molten steel continuous casting, by hot rolling, pickling, cold rolling, continuous annealing or bell-type annealing, smooth, deep-draw use is produced
The enamel cold-rolled steel sheet on way, main technologic parameters, final performance are shown in Table 2.Hydrogen permeability test standard uses ISO 17081
《Method of measurement of hydrogen permeation and determination of hydrogen
Uptake and transport in metals by an electrochemical technique ", it releases hydrogen face coating and adopts
Signal-to-noise ratio is improved with electronickelling coating.
The processing parameter and product of the enamel cold-rolled steel sheet of deep-draw purposes in each embodiment of table 2 and comparative example
It can compare
Steel plate carries out enamel after over cleaning post-processes, and glaze uses enamel sensitivity powder, using single or double enamel, table
3 be enamel technology and Evaluation results.The grading of enamelled pressed steel adhesion property: A is very excellent, B is excellent, C is more excellent, D is general,
E is problematic.
The adhesion property and fish scaling resistance of the enamel cold-rolled steel sheet of deep-draw purposes in each embodiment of table 3 and comparative example
From examples detailed above as can be seen that Fig. 1 is macroscopical picture after 1 enamel firing of embodiment, no squama is quick-fried.Fig. 2 is that comparative example 1 is warded off
Macroscopical picture after burning, local squama are quick-fried.Fig. 3 is the metallographic structure of embodiment, it can be seen that predominantly ferrite+carbide, it is brilliant
Granularity level is 10.5, contains a large amount of fine foreign matters.
The production method of the enamel cold-rolled steel sheet of deep-draw purposes of the invention, the enamel cold-rolled steel according to said method produced
Plate, tissue are mainly ferrite, and grain size number is 9.0~10.0, and containing a large amount of fine foreign matters, the surrender of mechanical property is strong
Spend 170~240MPa, tensile strength 320~380MPa, A50Elongation percentage is greater than 40%, n value and is greater than 1.7 greater than 0.20, r value, energy
Enough meet deep-draw purposes to require, hydrogen time of penetration >=20 minute, after product enamel, there is excellent fish scaling resistance and adherence
Energy.
Example of the present invention is only that preferred embodiments of the present invention will be described, not to present inventive concept and
Range is defined, and under the premise of not departing from design philosophy of the present invention, this field engineers and technicians are to technology of the invention
The various changes and improvements that scheme is made should all fall into protection scope of the present invention.
Claims (10)
1. a kind of enamel cold-rolled steel sheet of deep-draw purposes, it is characterised in that: in steel Mn element mass percent be 0.10~
0.30%, and N, B element mass percent are N:0.0050~0.0120%；B:0.0030~0.0090%；And N/B >=1.5.
2. a kind of enamel cold-rolled steel sheet of deep-draw purposes according to claim 1, it is characterised in that: C, Ti and S element
Mass percent is C≤0.005%, Ti:0.030~0.060%, S:0.010~0.030%.
3. a kind of enamel cold-rolled steel sheet of deep-draw purposes according to claim 1, it is characterised in that: each in cold-rolled steel sheet
Chemical element is according to following mass percent: C≤0.005%；Si≤0.05%；Mn:0.10~0.30%；P:0.040~
0.060%；S:0.010~0.030%；Als:0.010~0.060%；Ti:0.030~0.060%；N:0.0050~
0.0120%；B:0.0030~0.0090%, surplus are iron and inevitable impurity.
4. a kind of enamel cold-rolled steel sheet of deep-draw purposes according to claim 2 or 3, it is characterised in that: C, Ti, S, N
Relationship between B element weight percent is 0≤4.43B+Ti-3.42N-1.5S-4C≤0.020.
5. a kind of production method of the enamel cold-rolled steel sheet of deep-draw purposes, it is characterised in that: specific step is as follows:
Step 1: molten iron pre-processes, skims before progress and skim with after；
Step 2: converter smelting, is not added the pig iron, slag steel；It is tapped using self-loopa steel scrap, strengthens converter dephosphorization, reinforce pushing off the slag behaviour
Make；Tapping process adds lime, without deoxidation；
Step 3: alloy is finely tuned, it is 0.10~0.30% that Mn element mass percent in steel is controlled in alloy trim process, and N,
B element mass percent is N:0.0050~0.0120%；B:0.0030~0.0090%；And N/B >=1.5；
Step 4: RH furnace refines, the net circulation time is not less than 6min；
Step 5: continuous casting and hot rolling, and the temperature control that slab is come out of the stove is T1=1200~1220 DEG C；
Step 6: pickling；
Step 7: cold rolling；
Step 8: annealing, the annealing way is continuous annealing or bell-type annealing；
Step 9: smooth.
6. a kind of production method of the enamel cold-rolled steel sheet of deep-draw purposes according to claim 5, it is characterised in that: step
Continuous casting and hot rolling in rapid five are specifically, finishing temperature control is the T1 of T2=0.73~0.77, while controlling coiling temperature is T3=
0.65~0.79T2.
7. a kind of production method of the enamel cold-rolled steel sheet of deep-draw purposes according to claim 5, it is characterised in that: C,
Ti and S element mass percent is C≤0.005%, Ti:0.030~0.060%, S:0.010~0.030%.
8. a kind of production method of the enamel cold-rolled steel sheet of deep-draw purposes according to claim 7, it is characterised in that: C,
Relationship between Ti, S, N and B element weight percent is 0≤4.43B+Ti-3.42N-1.5S-4C≤0.020.
9. special according to a kind of described in any item production methods of the enamel cold-rolled steel sheet of deep-draw purposes of claim 5~8
Sign is: annealing way is continuous annealing in step 8, and the soaking temperature of continuous annealing is 800~840 DEG C, when soaking zone heats
Between 50~100s, 360~400 DEG C of overaging temperature, 4~8min of overaging time.
10. according to a kind of described in any item production methods of the enamel cold-rolled steel sheet of deep-draw purposes of claim 5~8,
Be characterized in that: annealing way is bell-type annealing in step 8, and the bringing-up section heating rate of bell-type annealing is 30~80 DEG C/h, cold spot
It 650~690 DEG C of temperature, 30~80 DEG C/h of cooling section rate, is kept the temperature at 360~400 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114015925A (en) * | 2021-10-26 | 2022-02-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for producing anti-scale explosion cold-rolled enamel steel |
| CN115558846A (en) * | 2022-09-16 | 2023-01-03 | 首钢集团有限公司 | Enameled steel plate and preparation method thereof |
| CN116334479A (en) * | 2023-02-11 | 2023-06-27 | 武安市裕华钢铁有限公司 | Low-cost deep-drawing steel plate and production process thereof |
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| CN116334479A (en) * | 2023-02-11 | 2023-06-27 | 武安市裕华钢铁有限公司 | Low-cost deep-drawing steel plate and production process thereof |
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