CN107513668A - A kind of heat zinc coating plate and its processing method - Google Patents
A kind of heat zinc coating plate and its processing method Download PDFInfo
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- CN107513668A CN107513668A CN201710598049.5A CN201710598049A CN107513668A CN 107513668 A CN107513668 A CN 107513668A CN 201710598049 A CN201710598049 A CN 201710598049A CN 107513668 A CN107513668 A CN 107513668A
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- 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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- 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
-
- 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
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-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
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The present invention relates to steel plate technical field of smelting, more particularly to a kind of heat zinc coating plate and its processing method, each chemical composition and the mass percent of each chemical composition that the heat zinc coating plate includes are：Carbon≤0.0040%, silicon：0.10 0.40%, manganese：0.50 0.70%, phosphorus：0.07 0.09%, sulphur ＜ 0.012%, full aluminium：0.020 0.050%, titanium：0.05 0.08%, boron ＜ 0.0015%, nitrogen ＜ 0.0040%.The heat zinc coating plate of the application can be applied in the preparation processing of the shell for the washing machine that washing capacity is more than ten kilograms, and the heat zinc coating plate has high intensity, high-mouldability and non-ageing feature, while it is low to produce and process cost.The yield strength of the heat zinc coating plate is 250 320MPa, and tensile strength is 370 460MPa, elongation after fracture A80mmMore than or equal to 30%.
Description
Technical field
The present invention relates to steel plate technical field of smelting, more particularly to a kind of heat zinc coating plate and its processing method.
Background technology
Requirement of the washing machine shell to steel is very strict, and it requires that steel plate has certain intensity, processability and resisted
It is ageing.Washing machine shell is typically made using heat zinc coating plate after color coating at present.Color coating process is equivalent to artificial aging, laundry
Machine shell has larger radian at column, is easy at washing machine column elongation strain trace occur if aging resistance difference to lack
Fall into, therefore to requiring high aging resistance energy for processing the heat zinc coating plate of washing machine shell.In addition, the roller of washing machine needs
Want load and rotate at a high speed, while deep-draw is needed at roller, therefore have to the heat zinc coating plate requirement for processing washing machine shell
There are high intensity and high-mouldability performance.However, in the prior art, there is intensity in the heat zinc coating plate for processing washing machine shell
The technical problem of low and aging resistance difference.
The content of the invention
In view of the above problems, it is proposed that the present invention so as to provide one kind overcome above mentioned problem or at least in part solve on
State the heat zinc coating plate and its processing method of problem.
The embodiment of the present invention provides a kind of heat zinc coating plate, each chemical composition that the heat zinc coating plate includes and each chemistry into
Point mass percent be：Carbon≤0.0040%, silicon：0.10-0.40%, manganese：0.50-0.70%, phosphorus：0.07-0.09%, sulphur
＜ 0.012%, full aluminium：0.020-0.050%, titanium：0.05-0.08%, boron ＜ 0.0015%, nitrogen ＜ 0.0040%.
Preferably, the thickness of the heat zinc coating plate is 0.4-2.5mm.
Preferably, the microstructure of the heat zinc coating plate is ferrite, there is Dispersed precipitate in the matrix of the heat zinc coating plate
Titanium carbide precipitated phase, the ferritic average grain size are 7-15 μm, and the size of the titanium carbide precipitated phase is 8-50nm.
Based on same inventive concept, the embodiment of the present invention also provides a kind of method for processing heat zinc coating plate as described above,
Methods described includes：
The molten iron for preparing the heat zinc coating plate is obtained, wherein, each chemical composition and eachization that the ladle contains
The mass percent studied point is：Carbon≤0.0040%, silicon：0.10-0.40%, manganese：0.50-0.70%, phosphorus：0.07-
0.09%, sulphur ＜ 0.012%, full aluminium：0.020-0.050%, titanium：0.05-0.08%, boron ＜ 0.0015%, nitrogen ＜
0.0040%；
Continuous casting is carried out to the molten iron, obtains strand；
Hot rolling is carried out to the strand, obtains hot rolled plate；
Cold rolling is carried out to the hot rolled plate, obtains cold-reduced sheet；
The cold-reduced sheet anneal and zinc-plated, obtain the heat zinc coating plate.
Preferably, it is described that hot rolling is carried out to the strand, hot rolled plate is obtained, including：
The strand is heated, wherein, heating-up temperature is 1180-1250 DEG C, and tapping temperature is 1200-1250 DEG C；
Multi-pass roughing is carried out to the strand after heating, obtains roughing plate, wherein, roughing outlet temperature is 1010-
1080 DEG C, the accumulative reduction ratio in rough rolling process is 70-85%；
Multi-pass finish rolling is carried out to the roughing plate, obtains finish rolling plate, wherein, the start rolling temperature of finish rolling is 1010-1080
DEG C, finishing temperature is 880-960 DEG C, and the accumulative reduction ratio in finishing stands is 75-90%；
By the finish rolling plate by being batched after section cooling, acquisition hot rolled plate, wherein, coiling temperature 660-740
℃。
Preferably, 4-7 passage roughing, in addition to the first passage roughing, remaining passage are carried out to the strand after heating
The reduction ratio of roughing is all higher than or equal to 15%.
Preferably, 6-8 passage finish rolling is carried out to the roughing plate, the reduction ratio of extreme trace time finish rolling is more than or equal to 8%.
Preferably, during cold rolling is carried out to the hot rolled plate, it is 60-85% to add up reduction ratio.
Preferably, during carrying out annealing and being zinc-plated to the cold-reduced sheet, bringing-up section temperature is 770-830 DEG C, institute
The transfer rate for stating cold-reduced sheet is 90-120m/min, and finishing elongation percentage is 0.8-1.5%.
One or more of embodiment of the present invention technical scheme, has at least the following technical effects or advantages：
Each chemical composition and the mass percent of each chemical composition that the heat zinc coating plate of the application includes be：Carbon≤
0.0040%, silicon：0.10-0.40%, manganese：0.50-0.70%, phosphorus：0.07-0.09%, sulphur ＜ 0.012%, full aluminium：0.020-
0.050%, titanium：0.05-0.08%, boron ＜ 0.0015%, nitrogen ＜ 0.0040%, due to using ultralow carbon component, and add titanium
Element, carbon is set to be changed into titanium carbide as far as possible, the titanium carbide of Dispersed precipitate can improve the strength of materials, while reduce solid solution carbon
Atom, to reduce timeliness；Silicon is used to remove the oxygen in molten steel as deoxidier, silicon solution strengthening, improves ferrite intensity；Manganese is consolidated
Molten reinforcing, improve ferrite intensity；Phosphorus solution strengthening, improve intensity；Aluminium is strong deoxidier, can suppress the life of other oxides
Into；Carbonized carbonaceous has precipitation strength effect, and intensity is provided for steel plate, and the titanium carbide particle of disperse educt can suppress crystal grain and grow up,
It ensure that steel plate crystal grain is tiny, crystal grain is tiny in addition to being contributed to intensity, also improves the elongation percentage of steel plate, ensure that steel plate
With high-strength high-elongation ratio；Boron easily forms boron nitride with nitrogen, so as to reduce solid solution nitrogen-atoms, to reduce timeliness.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is represented with identical reference pattern.In the accompanying drawings：
Fig. 1 shows the metallographic structure figure of the heat zinc coating plate of the present invention；
Fig. 2 shows the Ti of the heat zinc coating plate of present invention Second Phase Precipitation thing transmission electron microscope picture；
Fig. 3 shows the flow chart of the method for the processing heat zinc coating plate of the present invention.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
The application provides a kind of heat zinc coating plate, each chemical composition and the quality of each chemical composition that the heat zinc coating plate includes
Percentage is：Carbon (C)≤0.0040%, silicon (Si)：0.10-0.40%, manganese (Mn)：0.50-0.70%, phosphorus (P)：0.07-
0.09%, sulphur (S) ＜ 0.012%, full aluminium (Alt)：0.020-0.050%, titanium (Ti)：0.05-0.08%, boron (B) ＜
0.0015%, nitrogen (N) ＜ 0.0040%, remaining is iron and impurity.
The heat zinc coating plate of the application can apply the preparation of the shell in the washing machine that washing capacity is more than ten kilograms to add
In work, the heat zinc coating plate has high intensity, high-mouldability and non-ageing feature, while it is low to generate processing cost.The galvanizing
The yield strength of plate is 250-320MPa, tensile strength 370-460MPa, elongation after fracture A80mmMore than or equal to 30%.
In this application, the thickness for controlling heat zinc coating plate is 0.4-2.5mm.The microstructure of the heat zinc coating plate is iron element
Body, Dispersed precipitate has titanium carbide (TiC) precipitated phase in the matrix of heat zinc coating plate, and ferritic average grain size is 7-15 μm,
The size of titanium carbide precipitated phase is 8-50nm.Wherein, the metallographic structure figure of heat zinc coating plate is as shown in figure 1, the Ti of heat zinc coating plate
Second Phase Precipitation thing transmission electron microscope picture is as shown in Figure 2.
Based on same inventive concept, the present invention also provides a kind of method for processing foregoing heat zinc coating plate, as shown in figure 3, institute
The method of stating comprises the following steps：
Step 301：The molten iron for preparing the heat zinc coating plate is obtained, wherein, each chemical composition that the ladle contains
And the mass percent of each chemical composition is：Carbon≤0.0040%, silicon：0.10-0.40%, manganese：0.50-0.70%, phosphorus：
0.07-0.09%, sulphur ＜ 0.012%, full aluminium：0.020-0.050%, titanium：0.05-0.08%, boron ＜ 0.0015%, nitrogen ＜
0.0040%.
Step 302：Continuous casting is carried out to the molten iron, obtains strand.
Step 303：Hot rolling is carried out to the strand, obtains hot rolled plate.
Step 304：Cold rolling is carried out to the hot rolled plate, obtains cold-reduced sheet.
Step 305：The cold-reduced sheet anneal and zinc-plated, obtain the heat zinc coating plate.
In this application, step 303 specifically includes：
Step 3031：The strand is heated, wherein, heating-up temperature is 1180-1250 DEG C, and tapping temperature is
1200-1250℃。
Step 3032：Multi-pass roughing is carried out to the strand after heating, obtains roughing plate, wherein, roughing outlet temperature
Spend for 1010-1080 DEG C, the accumulative reduction ratio in rough rolling process is 70-85%.
Step 3033：Multi-pass finish rolling is carried out to the roughing plate, obtains finish rolling plate, wherein, the start rolling temperature of finish rolling is
1010-1080 DEG C, finishing temperature is 880-960 DEG C, and the accumulative reduction ratio in finishing stands is 75-90%.
Step 3034：By the finish rolling plate by being batched after section cooling, acquisition hot rolled plate, wherein, coiling temperature
For 660-740 DEG C.
More preferably, in step 3032,4-7 passage roughing is carried out to the strand after heating, except the first passage roughing
In addition, the reduction ratio of remaining passage roughing is all higher than or equal to 15%.
More preferably, in step 3033,6-8 passage finish rolling is carried out to the roughing plate, the reduction ratio of extreme trace time finish rolling is big
In or equal to 8%.
More preferably, during cold rolling is carried out to the hot rolled plate, it is 60-85% to add up reduction ratio.To described cold
Roll plate to carry out during annealing and being zinc-plated, bringing-up section temperature is 770-830 DEG C, and the transfer rate of the cold-reduced sheet is 90-
120m/min, finishing elongation percentage are 0.8-1.5%.
The heat zinc coating plate of the application and the corresponding method for processing heat zinc coating plate are entered below in conjunction with five specific embodiments
Row describes in detail.
The chemical composition such as following table one (unit wt.%) of heat zinc coating plate corresponding with five specific embodiments：
| Embodiment | C | Si | Mn | P | S | Alt | Ti | B | N |
| Embodiment 1 | 0.0020 | 0.19 | 0.59 | 0.07 | 0.005 | 0.045 | 0.06 | 0.0010 | 0.0017 |
| Embodiment 2 | 0.0031 | 0.19 | 0.6 | 0.08 | 0.006 | 0.036 | 0.06 | 0.0008 | 0.0015 |
| Embodiment 3 | 0.0017 | 0.19 | 0.6 | 0.08 | 0.005 | 0.034 | 0.06 | 0.0009 | 0.0018 |
| Embodiment 4 | 0.0020 | 0.2 | 0.61 | 0.08 | 0.005 | 0.043 | 0.07 | 0.0009 | 0.0020 |
| Embodiment 5 | 0.0015 | 0.2 | 0.6 | 0.07 | 0.005 | 0.047 | 0.06 | 0.0010 | 0.0019 |
Table one
Embodiment 1：The chemical composition of heat zinc coating plate sees the above table 1, and its thickness is 0.6mm.The method for processing the heat zinc coating plate
Including：
First, continuous casting will be carried out with the molten iron that content is corresponded in upper table 1, obtains strand.Then, heat is carried out to strand
Roll, course of hot rolling comprises the steps of：
(1) strand is heated, it is 1230 DEG C to control heating-up temperature, and tapping temperature is 1230 DEG C.
(2) 6 passage roughing are carried out to the strand after heating, it is 1040 DEG C to control roughing outlet temperature, whole rough rolling process
Accumulative reduction ratio be 84%, in addition to the first passage roughing, the reduction ratio of remaining passage roughing is all higher than or equal to 15%, from
And roughing plate is made.
(3) 7 passage finish rolling are carried out to roughing plate, the start rolling temperature of finish rolling is 1020 DEG C, and finishing temperature is 920 DEG C, entirely
It is 85% that finishing stands, which add up reduction ratio, and extreme trace time finish rolling reduction ratio is more than 8%, and extreme trace time finish rolling is carried out using F7 frames, from
And finish rolling plate is made.
(4) by finish rolling plate by being batched after section cooling, it is 700 DEG C to control coiling temperature, so as to which hot rolled plate be made.
After hot rolled plate is obtained, cold rolling is carried out to hot rolled plate, it is 85% that accumulative reduction ratio is controlled in cold-rolled process, so as to
Cold-reduced sheet is made.Finally, cold-reduced sheet anneal and zinc-plated, it is 820 DEG C to control bringing-up section temperature, the transfer rate of cold-reduced sheet
For 110m/min, finishing elongation percentage is 0.9%, so as to which heat zinc coating plate be made.
In embodiment 1, the yield strength of final obtained heat zinc coating plate is 276MPa, tensile strength 412MPa, is broken
Elongation percentage A afterwards80mmFor 31.5%.
Embodiment 2：The chemical composition of heat zinc coating plate sees the above table 1, and its thickness is 0.6mm.The method for processing the heat zinc coating plate
Including：
First, continuous casting will be carried out with the molten iron that content is corresponded in upper table 1, obtains strand.Then, heat is carried out to strand
Roll, course of hot rolling comprises the steps of：
(1) strand is heated, it is 1240 DEG C to control heating-up temperature, and tapping temperature is 1240 DEG C.
(2) 6 passage roughing are carried out to the strand after heating, it is 1050 DEG C to control roughing outlet temperature, whole rough rolling process
Accumulative reduction ratio be 83%, in addition to the first passage roughing, the reduction ratio of remaining passage roughing is all higher than or equal to 15%, from
And roughing plate is made.
(3) 7 passage finish rolling are carried out to roughing plate, the start rolling temperature of finish rolling is 1030 DEG C, and finishing temperature is 930 DEG C, entirely
It is 89% that finishing stands, which add up reduction ratio, and extreme trace time finish rolling reduction ratio is more than or equal to 8%, and extreme trace time finish rolling is entered using F7 frames
OK, so as to obtained finish rolling plate.
(4) by finish rolling plate by being batched after section cooling, it is 670 DEG C to control coiling temperature, so as to which hot rolled plate be made.
After hot rolled plate is obtained, cold rolling is carried out to hot rolled plate, it is 85% that accumulative reduction ratio is controlled in cold-rolled process, so as to
Cold-reduced sheet is made.Finally, cold-reduced sheet anneal and zinc-plated, it is 820 DEG C to control bringing-up section temperature, the transfer rate of cold-reduced sheet
For 110m/min, finishing elongation percentage is 0.9%, so as to which heat zinc coating plate be made.
In example 2, the yield strength of final obtained heat zinc coating plate is 305MPa, tensile strength 429MPa, is broken
Elongation percentage A afterwards80mmFor 30.5%.
Embodiment 3：The chemical composition of heat zinc coating plate sees the above table 1, and its thickness is 1mm.Process the method bag of the heat zinc coating plate
Include：
First, continuous casting will be carried out with the molten iron that content is corresponded in upper table 1, obtains strand.Then, heat is carried out to strand
Roll, course of hot rolling comprises the steps of：
(1) strand is heated, it is 1230 DEG C to control heating-up temperature, and tapping temperature is 1230 DEG C.
(2) 6 passage roughing are carried out to the strand after heating, it is 1040 DEG C to control roughing outlet temperature, whole rough rolling process
Accumulative reduction ratio be 84%, in addition to the first passage roughing, the reduction ratio of remaining passage roughing is all higher than or equal to 15%, from
And roughing plate is made.
(3) 7 passage finish rolling are carried out to roughing plate, the start rolling temperature of finish rolling is 1020 DEG C, and finishing temperature is 920 DEG C, entirely
It is 85% that finishing stands, which add up reduction ratio, and extreme trace time finish rolling reduction ratio is more than or equal to 8%, and extreme trace time finish rolling is entered using F7 frames
OK, so as to obtained finish rolling plate.
(4) by finish rolling plate by being batched after section cooling, it is 700 DEG C to control coiling temperature, so as to which hot rolled plate be made.
After hot rolled plate is obtained, cold rolling is carried out to hot rolled plate, it is 75% that accumulative reduction ratio is controlled in cold-rolled process, so as to
Cold-reduced sheet is made.Finally, cold-reduced sheet anneal and zinc-plated, it is 820 DEG C to control bringing-up section temperature, the transfer rate of cold-reduced sheet
For 110m/min, finishing elongation percentage is 1%, so as to which heat zinc coating plate be made.
In embodiment 3, the yield strength of final obtained heat zinc coating plate is 263MPa, tensile strength 399MPa, is broken
Elongation percentage A afterwards80mmFor 34.5%.
Embodiment 4：The chemical composition of heat zinc coating plate sees the above table 1, and its thickness is 1mm.Process the method bag of the heat zinc coating plate
Include：
First, continuous casting will be carried out with the molten iron that content is corresponded in upper table 1, obtains strand.Then, heat is carried out to strand
Roll, course of hot rolling comprises the steps of：
(1) strand is heated, it is 1240 DEG C to control heating-up temperature, and tapping temperature is 1240 DEG C.
(2) 6 passage roughing are carried out to the strand after heating, it is 1050 DEG C to control roughing outlet temperature, whole rough rolling process
Accumulative reduction ratio be 84%, in addition to the first passage roughing, the reduction ratio of remaining passage roughing is all higher than or equal to 15%, from
And roughing plate is made.
(3) 7 passage finish rolling are carried out to roughing plate, the start rolling temperature of finish rolling is 1030 DEG C, and finishing temperature is 910 DEG C, entirely
It is 85% that finishing stands, which add up reduction ratio, and extreme trace time finish rolling reduction ratio is more than or equal to 8%, and extreme trace time finish rolling is entered using F7 frames
OK, so as to obtained finish rolling plate.
(4) by finish rolling plate by being batched after section cooling, it is 700 DEG C to control coiling temperature, so as to which hot rolled plate be made.
After hot rolled plate is obtained, cold rolling is carried out to hot rolled plate, it is 75% that accumulative reduction ratio is controlled in cold-rolled process, so as to
Cold-reduced sheet is made.Finally, cold-reduced sheet anneal and zinc-plated, it is 820 DEG C to control bringing-up section temperature, the transfer rate of cold-reduced sheet
For 110m/min, finishing elongation percentage is 1%, so as to which heat zinc coating plate be made.
In example 4, the yield strength of final obtained heat zinc coating plate is 279MPa, tensile strength 418MPa, is broken
Elongation percentage A afterwards80mmFor 34.5%.
Embodiment 5：The chemical composition of heat zinc coating plate sees the above table 1, and its thickness is 0.8mm.The method for processing the heat zinc coating plate
Including：
First, continuous casting will be carried out with the molten iron that content is corresponded in upper table 1, obtains strand.Then, heat is carried out to strand
Roll, course of hot rolling comprises the steps of：
(1) strand is heated, it is 1230 DEG C to control heating-up temperature, and tapping temperature is 1230 DEG C.
(2) 6 passage roughing are carried out to the strand after heating, it is 1040 DEG C to control roughing outlet temperature, whole rough rolling process
Accumulative reduction ratio be 83%, in addition to the first passage roughing, the reduction ratio of remaining passage roughing is all higher than or equal to 15%, from
And roughing plate is made.
(3) 7 passage finish rolling are carried out to roughing plate, the start rolling temperature of finish rolling is 1030 DEG C, and finishing temperature is 920 DEG C, entirely
It is 86% that finishing stands, which add up reduction ratio, and extreme trace time finish rolling reduction ratio is more than or equal to 8%, and extreme trace time finish rolling is entered using F7 frames
OK, so as to obtained finish rolling plate.
(4) by finish rolling plate by being batched after section cooling, it is 700 DEG C to control coiling temperature, so as to which hot rolled plate be made.
After hot rolled plate is obtained, cold rolling is carried out to hot rolled plate, it is 80% that accumulative reduction ratio is controlled in cold-rolled process, so as to
Cold-reduced sheet is made.Finally, cold-reduced sheet anneal and zinc-plated, it is 820 DEG C to control bringing-up section temperature, the transfer rate of cold-reduced sheet
For 110m/min, finishing elongation percentage is 0.9%, so as to which heat zinc coating plate be made.
In embodiment 5, the yield strength of final obtained heat zinc coating plate is 275MPa, tensile strength 417MPa, is broken
Elongation percentage A afterwards80mmFor 34%.
In this application, C≤0.0040% in heat zinc coating plate, due to using ultralow carbon component, and Ti elements are added, made
C element is changed into TiC as far as possible, and the TiC of Dispersed precipitate can improve the strength of materials, while reduces solid solution C atoms, during reducing
Effect.Si in heat zinc coating plate is that 0.10~0.40%, Si is used to remove the oxygen in molten steel as deoxidier, Si solution strengthening, is carried
High ferrite intensity.Mn in heat zinc coating plate is 0.50~0.70%, Mn solution strengthening, improves ferrite intensity.Heat zinc coating plate
In P for 0.07~0.09%, P be one of the most important element in high strength steel that phosphorates, P solution strengthening improves intensity, and P is
One of maximally effective element of intensity is improved, its solid solution strengthening effect is only second to C, N.S in heat zinc coating plate<0.012%, sulfur content
Large-sized manganese sulfide is easily formed when higher, significantly reduces the plasticity of steel plate, is also easy to produce heat when sulfur content is higher in addition
Fragility, therefore sulfur content is not to be exceeded 0.012%.Alt in heat zinc coating plate is 0.020~0.050%, and aluminium is strong deoxidier,
The generation of other oxides, aluminium and oxygen reaction generation aluminum oxide, the moulding difference of aluminum oxide, substantial amounts of alumina inclusion can be suppressed
The processability of steel plate can be damaged, therefore selects a certain amount of aluminium to be selected to deoxidation, Als 0.020~0.050%.Galvanizing
Ti in plate for 0.05~0.08%, Ti with C-shaped into TiC, TiC has precipitation strength effect, provides intensity for steel plate, disperse is analysed
The TiC particles gone out can suppress crystal grain and grow up, and ensure that steel plate crystal grain is tiny, crystal grain is tiny in addition to being contributed to intensity, also carries
The high elongation percentage of steel plate, ensure that steel plate has high-strength high-elongation ratio.B in heat zinc coating plate<0.0015%, B easily with N shapes
Into BN, so as to reduce solid solution N atoms, to reduce timeliness.N in heat zinc coating plate<0.0040%, N are harmful element, control it to contain
Amount is as low as possible, and fixes N atoms with micro B, makes that solid solution N atoms are as far as possible low, and to reduce timeliness, therefore N content is not to be exceeded
0.0040%.
Compared with existing washing machine shell heat zinc coating plate, the heat zinc coating plate of the application has the characteristics that：
(1) intensity is high, and yield strength is 250~320MP, available for the washing machine for making ten kilograms of washing capacity and the above
Shell, because its intensity is high, the anti-vibration resistance and noise immunity when washing machine drum rotates at a high speed are good.
(2) high-mouldability, elongation after fracture A80mm>=30%, elongation percentage and intensity are the performances to condition each other, are typically carried
High intensity can cause elongation percentage to reduce, and heat zinc coating plate of the invention, still with high-elongation, can be protected while with high intensity
Demonstrate,prove the bending and punching press of washing machine plate.
(3) heat zinc coating plate of the invention is lower than the cost of the similar high strength steel that phosphorates.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (9)
1. a kind of heat zinc coating plate, it is characterised in that each chemical composition and the matter of each chemical composition that the heat zinc coating plate includes
Measuring percentage is：Carbon≤0.0040%, silicon：0.10-0.40%, manganese：0.50-0.70%, phosphorus：0.07-0.09%, sulphur ＜
0.012%, full aluminium：0.020-0.050%, titanium：0.05-0.08%, boron ＜ 0.0015%, nitrogen ＜ 0.0040%.
2. heat zinc coating plate as claimed in claim 1, it is characterised in that the thickness of the heat zinc coating plate is 0.4-2.5mm.
3. heat zinc coating plate as claimed in claim 1, it is characterised in that the microstructure of the heat zinc coating plate is ferrite, institute
Stating Dispersed precipitate in the matrix of heat zinc coating plate has titanium carbide precipitated phase, and the ferritic average grain size is 7-15 μm, institute
The size for stating titanium carbide precipitated phase is 8-50nm.
A kind of 4. method for processing the heat zinc coating plate as described in any claim in claim 1-3, it is characterised in that described
Method includes：
Obtain the molten iron for preparing the heat zinc coating plate, wherein, each chemical composition that the ladle contains and each chemistry into
The mass percent divided：Carbon≤0.0040%, silicon：0.10-0.40%, manganese：0.50-0.70%, phosphorus：0.07-0.09%, sulphur ＜
0.012%, full aluminium：0.020-0.050%, titanium：0.05-0.08%, boron ＜ 0.0015%, nitrogen ＜ 0.0040%；
Continuous casting is carried out to the molten iron, obtains strand；
Hot rolling is carried out to the strand, obtains hot rolled plate；
Cold rolling is carried out to the hot rolled plate, obtains cold-reduced sheet；
The cold-reduced sheet anneal and zinc-plated, obtain the heat zinc coating plate.
5. method as claimed in claim 4, it is characterised in that it is described that hot rolling is carried out to the strand, obtain hot rolled plate, bag
Include：
The strand is heated, wherein, heating-up temperature is 1180-1250 DEG C, and tapping temperature is 1200-1250 DEG C；
Multi-pass roughing is carried out to the strand after heating, obtains roughing plate, wherein, roughing outlet temperature is 1010-1080
DEG C, the accumulative reduction ratio in rough rolling process is 70-85%；
Multi-pass finish rolling is carried out to the roughing plate, obtains finish rolling plate, wherein, the start rolling temperature of finish rolling is 1010-1080 DEG C, eventually
It is 880-960 DEG C to roll temperature, and the accumulative reduction ratio in finishing stands is 75-90%；
By the finish rolling plate by being batched after section cooling, acquisition hot rolled plate, wherein, coiling temperature is 660-740 DEG C.
6. method as claimed in claim 5, it is characterised in that 4-7 passage roughing is carried out to the strand after heating, except the
Beyond a time roughing, the reduction ratio of remaining passage roughing is all higher than or equal to 15%.
7. method as claimed in claim 5, it is characterised in that 6-8 passage finish rolling, extreme trace time finish rolling are carried out to the roughing plate
Reduction ratio be more than or equal to 8%.
8. method as claimed in claim 4, it is characterised in that during cold rolling is carried out to the hot rolled plate, add up pressure
Lower rate is 60-85%.
9. method as claimed in claim 4, it is characterised in that during carrying out annealing and being zinc-plated to the cold-reduced sheet,
Bringing-up section temperature is 770-830 DEG C, and the transfer rate of the cold-reduced sheet is 90-120m/min, and finishing elongation percentage is 0.8-
1.5%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457188A (en) * | 2018-12-21 | 2019-03-12 | 首钢京唐钢铁联合有限责任公司 | Hot-dip galvanized sheet for U-shaped shell of roller washing machine and preparation method thereof |
| CN114908286A (en) * | 2021-02-07 | 2022-08-16 | 上海梅山钢铁股份有限公司 | Aging-resistant hot-dip aluminum-zinc plated steel plate for household appliances and manufacturing method thereof |
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| JPS5669358A (en) * | 1979-10-18 | 1981-06-10 | Kobe Steel Ltd | Ultra low carbon cold rolled steel sheet with superior press formability |
| CN104388816A (en) * | 2014-10-29 | 2015-03-04 | 江苏沙钢集团有限公司 | Low-carbon steel plate with ultralow yield ratio and manufacturing method thereof |
| CN105838990A (en) * | 2015-11-30 | 2016-08-10 | 武汉钢铁(集团)公司 | Zinc-iron alloy coating cold-formed steel plate production method |
| CN106834938A (en) * | 2017-01-17 | 2017-06-13 | 唐山钢铁集团有限责任公司 | The high-strength galvanized steel of 400MPa grade ultra-low-carbons and its production method |
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| JPS5669358A (en) * | 1979-10-18 | 1981-06-10 | Kobe Steel Ltd | Ultra low carbon cold rolled steel sheet with superior press formability |
| CN104388816A (en) * | 2014-10-29 | 2015-03-04 | 江苏沙钢集团有限公司 | Low-carbon steel plate with ultralow yield ratio and manufacturing method thereof |
| CN105838990A (en) * | 2015-11-30 | 2016-08-10 | 武汉钢铁(集团)公司 | Zinc-iron alloy coating cold-formed steel plate production method |
| CN106834938A (en) * | 2017-01-17 | 2017-06-13 | 唐山钢铁集团有限责任公司 | The high-strength galvanized steel of 400MPa grade ultra-low-carbons and its production method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109457188A (en) * | 2018-12-21 | 2019-03-12 | 首钢京唐钢铁联合有限责任公司 | Hot-dip galvanized sheet for U-shaped shell of roller washing machine and preparation method thereof |
| CN114908286A (en) * | 2021-02-07 | 2022-08-16 | 上海梅山钢铁股份有限公司 | Aging-resistant hot-dip aluminum-zinc plated steel plate for household appliances and manufacturing method thereof |
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| CN107513668B (en) | 2020-02-18 |
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