CN106929771A - The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate and preparation method - Google Patents
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate and preparation method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
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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
- C21D8/0226—Hot rolling
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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
- C21D8/0236—Cold rolling
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- 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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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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Abstract
The invention discloses the 1000MPa grades of high-strength galvanized steel of two-phase and steel plate and preparation method thereof, the strip and substrate steel sheet composition and its mass content are as follows：C：0.06~0.15%, Mn：2.2~2.8%, Si：0.45~0.65%, Cr：0.40~0.60%, P≤0.012%, S≤0.002%, Als：0.020~0.070%, Ti：0.010~0.030%, Mo：0.15~0.30%, remaining is Fe and not purgeable impurity.Preparation method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure.The present invention uses new composition design, by controlling the technological parameter of each operation, greatly reduces production difficulty, improves product qualified rate.The features such as finished product has good processability, mechanical performance and corrosion resistance, tensile strength is in more than 1000MPa.
Description
Technical field
The invention belongs to iron and steel smelting technology field, and in particular to the 1000MPa grades of high-strength galvanized steel of two-phase and steel plate and
Preparation method.
Background technology
In recent years, the need in order to meet the energy-saving and environmental protection of automobile loss of weight and security, the advanced high-strength steel such as dual phase steel is got over
More to be paid close attention to by scholars.Dual phase steel is because with yield strength is low, tensile strength is high, yield tensile ratio is low, processing hardening is bright
Many advantages, such as aobvious, elongation after fracture plasticity high, easily stamping, good and toughness are matched is increasingly becoming the weight of automobile making
Want material.
The microscopic structure of the DP high-strength galvanizing steel Automobile Plate products of series is made up of ferrite and martensite, martensitic structure with
Island Dispersed precipitate is on ferritic matrix.Ferrite is softer, steel is possessed preferable formability；Martensite is harder, makes
Steel possess intensity higher.With the rising of martensite proportion, its intensity is higher.According to purposes, varying strength can be produced
The dual phase steel of rank and different yield tensile ratios (YS/TS).The easy cutting forming of dual phase steel, can be welded with traditional welding method.Its tool
The characteristics of for without surrender extension, without room-temperature aging, low yield strength ratio, work hardening index high and baking hardening value.
In the production process of high-strength galvanized steel and steel plate, because the addition of Mn and Si elements is more, in annealing process
In, Mn and Si elements generate oxide to surface enrichment, are enriched with strip and surface of steel plate in follow-up heat treatment process, make
Reduced with the adhesiveness of pure zinc into strip and surface of steel plate, or even the plating leakage that zinc layers can be caused.Therefore new composition design is studied,
By the process parameter control to each operation, especially to the control of annealing process technological parameter, strip and steel can be decide
The template of plate, surface quality and mechanical property.
The content of the invention
The technical problem to be solved in the present invention is to provide 1000MPa wide grades of high-strength galvanized steel of two-phase of annealing temperature window
And steel plate；Present invention also offers the 1000MPa grades of high-strength galvanized steel of two-phase and the preparation method of steel plate.The inventive method is used
New composition design, is prepared by controlling the technological parameter of each operation, greatly reduces production difficulty, improves finished product conjunction
Lattice rate；Simple with production, enforcement difficulty is small, produces stabilization, baking hardening effect and the low feature of yield tensile ratio.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：1000MPa grades of high-strength galvanized steel of two-phase and
Steel plate, the galvanized steel and substrate steel sheet chemical composition and weight/mass percentage composition are：C：0.06~0.15%, Mn：2.2~
2.8%, Si：0.45~0.65%, Cr：0.40~0.60%, P≤0.012%, S≤0.002%, Als：0.020~0.070%, Ti：
0.010~0.030%, Mo：0.15~0.30%, remaining is Fe and not purgeable impurity.
Present invention also offers the 1000MPa grades of high-strength galvanized steel of two-phase and the preparation method of steel plate, it includes heating, heat
Roll, cold rolling, continuous zinc coating, finishing and passivation procedure, the galvanized steel and substrate steel sheet chemical composition and weight/mass percentage composition
For：C：0.06~0.15%, Mn：2.2~2.8%, Si：0.45~0.65%, Cr：0.40~0.60%, P≤0.012%, S≤
0.002%, Als：0.020~0.070%, Ti：0.010~0.030%, Mo：0.15~0.30%, remaining is Fe and not purgeable
Impurity.The quenching degree of steel is usually improved using addition Mn and Cr units, increases the generation ratio of martensite during rapid cooling；Addition
Mo elements, can slow down the precipitation of martensite panel-shaped base body grain boundary carbide in phase transition process, so as to improve organization and performance.
Hot-rolled process of the present invention, heating-up temperature is 1200~1350 DEG C, and finish rolling finishing temperature is 875~905 DEG C, volume
Temperature is taken for 620~750 DEG C.
Cold rolling process of the present invention, cold rolling reduction ratio >=50%.
Continuous zinc coating operation of the present invention, soaking temperature is 760~840 DEG C；First slow cooling is to 680~740 DEG C, then rapid cooling
To 420~450 DEG C；458~462 DEG C of zinc-plated temperature；Annealing soaking time be 100~200s, 10~20 DEG C of slow cooling cooldown rate/
S, rapid cooling cooldown rate 35~65 DEG C/s, zinc-plated 5~15s of time；- 10 DEG C~+20 DEG C of preheating section dew point（+ 8 DEG C of target）, heating
- 20 DEG C~+10 DEG C of 1 dew point of section（+ 5 DEG C of desired value）, -5 DEG C~-30 DEG C of 2 dew point of bringing-up section（- 20 DEG C of desired value）.By adjustment
The dew point value in galvanization annealing furnace area, in the form of pre-oxidation is restored, one layer of sponge iron is formed in strip and surface of steel plate, is carried
The wellability of strip high and steel plate, in strip and surface of steel plate plating last layer pure zinc layer, effectively hinders the corrosion of matrix, its
Finished product has good processability, mechanical performance and corrosion resistance, and production window is wide, process is simple, control stabilization.
Finishing operation of the present invention, finishing elongation percentage is 0.2~0.6%.
Passivation procedure of the present invention, 80~120 DEG C of passivation temperature.
Heating process of the present invention, heating-up temperature is 1200~1350 DEG C, and total heat time is 90~180min.
This 1000MPa grades of high-strength galvanized steel of two-phase and steel sheet product examination criteria refer to GB《GB/T2518-2008 connects
Continuous hot-dip galvanizing sheet steel and steel band》.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, this galvanized steel and steel plate are using addition Mn and Cr
The quenching degree of steel usually improves in unit, increases the generation ratio of martensite during rapid cooling；Mo elements are with the addition of, in phase transition process
The precipitation of martensite panel-shaped base body grain boundary carbide can be slowed down, so as to improve organization and performance.2nd, Si is added in strip and steel plate
With Mn elements, it is enriched with to strip and surface of steel plate in zinc-plated annealing process, easily produces plating leakage, the present invention is zinc-plated by adjusting
The dew point value in annealing furnace area, the form restored by pre-oxidation forms one layer of sponge iron in strip and surface of steel plate, improves band
The wettability of steel and steel plate, in strip and surface of steel plate plating last layer pure zinc layer, effectively hinders the corrosion of matrix.3rd, this hair
Bright finished product has good processability, mechanical performance and corrosion resistance, and tensile strength is in more than 1000MPa, yield strength
600-750MPa, elongation A50% >=10%, and production window is wide, simple production process, control stabilization, with well using preceding
Scape.
Specific embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
The method of the present invention 1000MPa grades of high-strength galvanized steel of two-phase of production and steel plate is as follows：
Using the chemical composition identical continuous casting billet with galvanized steel described in table 1 and substrate steel sheet, heated, hot rolling, cold rolling, company
Continue zinc-plated, finishing and passivation procedure prepares the described high-strength galvanized steel of two-phase and steel plate.Heating process uses step-by-step movement
Heating stove heat, the heating-up temperature of continuous casting billet is 1200~1350 DEG C, and total heat time is 90~180min；The essence of hot-rolled process
It is 875~905 DEG C to roll finishing temperature, and coiling temperature is 620~750 DEG C；Cold rolling reduction ratio >=50% of cold rolling process；Continuous plating
The soaking temperature of zinc operation is 760~840 DEG C, and first slow cooling is to 680~740 DEG C, then is cooled to 420~450 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）458~462 DEG C, -10 DEG C~+20 DEG C of preheating section dew point, -20 DEG C~+10 DEG C of 1 dew point of bringing-up section, bringing-up section 2 is revealed
- 5 DEG C~-30 DEG C of point, annealing process 100~200s of soaking time, 10~20 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 35
~65 DEG C/s, zinc-plated 5~15s of time；The finishing elongation percentage of finishing operation is 0.2~0.6%；The passivation temperature of passivation procedure is
80~120 DEG C.Each embodiment gained galvanized steel and steel plate carry out performance detection, take horizontal sample, and sample marking distance is 50mm, is put down
The width of row section is 25mm, and the mechanical property that detection is obtained is shown in Table 2.
Embodiment 1
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate, substrate chemical composition and weight/mass percentage composition are shown in Table 1, mechanical property
It is shown in Table 2.
Production method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure, comprises the following steps that：
1）Heating process：Continuous casting billet uses stepped heating stove heat, and the bringing-up section soaking temperature of continuous casting billet is 1280 DEG C, total to add
The hot time is 120min.
2）Hot-rolled process：Finish rolling finishing temperature is 880 DEG C, and coiling temperature is 680 DEG C.
3）Cold rolling process：Cold rolling reduction ratio 50%.
4）Continuous zinc coating operation：Soaking temperature is 795 DEG C, and first slow cooling is to 710 DEG C, then is cooled to 445 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）461℃；+ 5 DEG C of preheating section dew point ,+3 DEG C of 1 dew point of bringing-up section, -20 DEG C of 2 dew point of bringing-up section；Annealing process is incubated
Time 140s；15 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 52.5 DEG C/s, zinc-plated time 6s.
5）Finishing operation, finishing elongation percentage is 0.3%.
6）Passivation procedure, passivation temperature is 90 DEG C.
Embodiment 2
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate, substrate chemical composition and weight/mass percentage composition are shown in Table 1, mechanical property
It is shown in Table 2.
Production method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure, comprises the following steps that：
1）Heating process：Continuous casting billet uses stepped heating stove heat, and the bringing-up section soaking temperature of continuous casting billet is 1350 DEG C, total to add
The hot time is 140min.
2）Hot-rolled process：Finish rolling finishing temperature is 875 DEG C, and coiling temperature is 690 DEG C.
3）Cold rolling process：Cold rolling reduction ratio 55%.
4）Continuous zinc coating operation：Soaking temperature is 770 DEG C, and first slow cooling is to 700 DEG C, then is cooled to 420 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）460℃；- 10 DEG C of preheating section dew point ,+3 DEG C of 1 dew point of bringing-up section, -10 DEG C of 2 dew point of bringing-up section；Annealing process is incubated
Time 160s；10 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 65 DEG C/s, zinc-plated time 8s.
5）Finishing operation, finishing elongation percentage is 0.35%.
6）Passivation procedure, passivation temperature is 80 DEG C.
Embodiment 3
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate, substrate chemical composition and weight/mass percentage composition are shown in Table 1, mechanical property
It is shown in Table 2.
Production method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure, comprises the following steps that：
1）Heating process：Continuous casting billet uses stepped heating stove heat, and the bringing-up section soaking temperature of continuous casting billet is 1250 DEG C, total to add
The hot time is 100min.
2）Hot-rolled process：Finish rolling finishing temperature is 905 DEG C, and coiling temperature is 620.
3）Cold rolling process：Cold rolling reduction ratio 50%.
4）Continuous zinc coating operation：Soaking temperature is 840 DEG C, and first slow cooling is to 740 DEG C, then is cooled to 450 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）460℃；+ 9 DEG C of preheating section dew point, -20 DEG C of 1 dew point of bringing-up section, -5 DEG C of 2 dew point of bringing-up section；Annealing process is incubated
Time 130s；20 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 35 DEG C/s, zinc-plated time 7s.
5）Finishing operation, finishing elongation percentage is 0.3%.
6）Passivation procedure, passivation temperature is 120 DEG C.
Embodiment 4
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate, substrate chemical composition and weight/mass percentage composition are shown in Table 1, mechanical property
It is shown in Table 2.
Production method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure, comprises the following steps that：
1）Heating process：Continuous casting billet uses stepped heating stove heat, and the bringing-up section soaking temperature of continuous casting billet is 1300 DEG C, total to add
The hot time is 160min.
2）Hot-rolled process：Finish rolling finishing temperature is 890 DEG C, and coiling temperature is 690 DEG C.
3）Cold rolling process：Cold rolling reduction ratio 55%.
4）Continuous zinc coating operation：Soaking temperature is 825 DEG C, and first slow cooling is to 690 DEG C, then is cooled to 440 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）460℃；+ 5 DEG C of preheating section dew point ,+10 DEG C of 1 dew point of bringing-up section, -10 DEG C of 2 dew point of bringing-up section；Annealing process is incubated
Time 110s；15 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 56 DEG C/s, zinc-plated time 5s.
5）Finishing operation, finishing elongation percentage is 0.6%.
6）Passivation procedure, passivation temperature is 90 DEG C.
Embodiment 5
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate, substrate chemical composition and weight/mass percentage composition are shown in Table 1, mechanical property
It is shown in Table 2.
Production method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure, comprises the following steps that：
1）Heating process：Continuous casting billet uses stepped heating stove heat, and the bringing-up section soaking temperature of continuous casting billet is 1310 DEG C, total to add
The hot time is 90min.
2）Hot-rolled process：Finish rolling finishing temperature is 895 DEG C, and coiling temperature is 690 DEG C.
3）Cold rolling process：Cold rolling reduction ratio 50%.
4）Continuous zinc coating operation：Soaking temperature is 800 DEG C, and first slow cooling is to 710 DEG C, then is cooled to 440 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）458℃；+ 20 DEG C of preheating section dew point ,+4 DEG C of 1 dew point of bringing-up section, -20 DEG C of 2 dew point of bringing-up section；Annealing process is incubated
Time 180s；10 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 55 DEG C/s, zinc-plated time 8s.
5）Finishing operation, finishing elongation percentage is 0.3%.
6）Passivation procedure, passivation temperature is 90 DEG C.
Embodiment 6
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate, substrate chemical composition and weight/mass percentage composition are shown in Table 1, mechanical property
It is shown in Table 2.
Production method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure, comprises the following steps that：
1）Heating process：Continuous casting billet uses stepped heating stove heat, and the bringing-up section soaking temperature of continuous casting billet is 1280 DEG C, total to add
The hot time is 130min.
2）Hot-rolled process：Finish rolling finishing temperature is 900 DEG C, and coiling temperature is 680 DEG C.
3）Cold rolling process：Cold rolling reduction ratio 50%.
4）Continuous zinc coating operation：Soaking temperature is 790 DEG C, and first slow cooling is to 700 DEG C, then is cooled to 445 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）460℃；+ 5 DEG C of preheating section dew point ,+5 DEG C of 1 dew point of bringing-up section, -30 DEG C of 2 dew point of bringing-up section；Annealing process is incubated
Time 100s；15 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 54 DEG C/s, zinc-plated time 6s.
5）Finishing operation, finishing elongation percentage is 0.2%.
6）Passivation procedure, passivation temperature is 90 DEG C.
Embodiment 7
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate, substrate chemical composition and weight/mass percentage composition are shown in Table 1, mechanical property
It is shown in Table 2.
Production method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure, comprises the following steps that：
1）Heating process：Continuous casting billet uses stepped heating stove heat, and the bringing-up section soaking temperature of continuous casting billet is 1290 DEG C, total to add
The hot time is 100min.
2）Hot-rolled process：Finish rolling finishing temperature is 880 DEG C, and coiling temperature is 690 DEG C.
3）Cold rolling process：Cold rolling reduction ratio 55%.
4）Continuous zinc coating operation：Soaking temperature is 810 DEG C, and first slow cooling is to 700 DEG C, then is cooled to 440 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）460℃；+ 6 DEG C of preheating section dew point ,+4 DEG C of 1 dew point of bringing-up section, -20 DEG C of 2 dew point of bringing-up section；Annealing process is incubated
Time 170s；15 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 55 DEG C/s, zinc-plated time 12s.
5）Finishing operation, finishing elongation percentage is 0.3%.
6）Passivation procedure, passivation temperature is 110 DEG C.
Embodiment 8
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate, substrate chemical composition and weight/mass percentage composition are shown in Table 1, mechanical property
It is shown in Table 2.
Production method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure, comprises the following steps that：
1）Heating process：Continuous casting billet uses stepped heating stove heat, and the bringing-up section soaking temperature of continuous casting billet is 1290 DEG C, total to add
The hot time is 95min.
2）Hot-rolled process：Finish rolling finishing temperature is 885 DEG C, and coiling temperature is 750 DEG C.
3）Cold rolling process：Cold rolling reduction ratio 55%.
4）Continuous zinc coating operation：Soaking temperature is 805 DEG C, and first slow cooling is to 710 DEG C, then is cooled to 440 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）459℃；+ 7 DEG C of preheating section dew point ,+5 DEG C of 1 dew point of bringing-up section, -20 DEG C of 2 dew point of bringing-up section；Annealing process is incubated
Time 120s；16 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 50.5 DEG C/s, zinc-plated time 7s.
5）Finishing operation, finishing elongation percentage is 0.3%.
6）Passivation procedure, passivation temperature is 90 DEG C.
Embodiment 9
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate, substrate chemical composition and weight/mass percentage composition are shown in Table 1, mechanical property
It is shown in Table 2.
Production method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure, comprises the following steps that：
1）Heating process：Continuous casting billet uses stepped heating stove heat, and the bringing-up section soaking temperature of continuous casting billet is 1200 DEG C, total to add
The hot time is 180min.
2）Hot-rolled process：Finish rolling finishing temperature is 880 DEG C, and coiling temperature is 690 DEG C.
3）Cold rolling process：Cold rolling reduction ratio 50%.
4）Continuous zinc coating operation：Soaking temperature is 795 DEG C, and first slow cooling is to 700 DEG C, then is cooled to 445 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）460℃；+ 6 DEG C of preheating section dew point ,+4 DEG C of 1 dew point of bringing-up section, -20 DEG C of 2 dew point of bringing-up section；Annealing process is incubated
Time 200s；17 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 55 DEG C/s, zinc-plated time 15s.
5）Finishing operation, finishing elongation percentage is 0.3%.
6）Passivation procedure, passivation temperature is 90 DEG C.
Embodiment 10
The 1000MPa grades of high-strength galvanized steel of two-phase and steel plate, substrate chemical composition and weight/mass percentage composition are shown in Table 1, mechanical property
It is shown in Table 2.
Production method includes heating, hot rolling, cold rolling, continuous zinc coating, finishing and passivation procedure, comprises the following steps that：
1）Heating process：Continuous casting billet uses stepped heating stove heat, and the bringing-up section soaking temperature of continuous casting billet is 1280 DEG C, total to add
The hot time is 90min.
2）Hot-rolled process：Finish rolling finishing temperature is 885 DEG C, and coiling temperature is 690 DEG C.
3）Cold rolling process：Cold rolling reduction ratio 50%.
4）Continuous zinc coating operation：Soaking temperature is 760 DEG C, and first slow cooling is to 680 DEG C, then is cooled to 440 DEG C soon；Zinc-plated temperature
（Zinc liquid temperature）462℃；+ 6 DEG C of preheating section dew point ,+5 DEG C of 1 dew point of bringing-up section, -15 DEG C of 2 dew point of bringing-up section；Annealing process is incubated
Time 145s；14 DEG C/s of slow cooling cooldown rate, rapid cooling cooldown rate 52 DEG C/s, zinc-plated time 10s.
5）Finishing operation, finishing elongation percentage is 0.3%.
6）Passivation procedure, passivation temperature is 100 DEG C.
The chemical composition (wt%) of the embodiment 1-10 galvanized steels of table 1 and substrate steel sheet
| Embodiment | C | Mn | Si | P | S | Als | Cr | Ti | Mo |
| 1 | 0.09 | 2.42 | 0.50 | 0.011 | 0.002 | 0.020 | 0.55 | 0.020 | 0.20 |
| 2 | 0.10 | 2.20 | 0.45 | 0.012 | 0.001 | 0.045 | 0.50 | 0.010 | 0.20 |
| 3 | 0.15 | 2.80 | 0.65 | 0.010 | 0.002 | 0.041 | 0.40 | 0.020 | 0.15 |
| 4 | 0.10 | 2.50 | 0.60 | 0.012 | 0.001 | 0.043 | 0.49 | 0.030 | 0.22 |
| 5 | 0.09 | 2.50 | 0.55 | 0.012 | 0.001 | 0.042 | 0.48 | 0.025 | 0.30 |
| 6 | 0.09 | 2.65 | 0.55 | 0.011 | 0.002 | 0.041 | 0.50 | 0.020 | 0.25 |
| 7 | 0.06 | 2.70 | 0.60 | 0.010 | 0.001 | 0.043 | 0.60 | 0.020 | 0.20 |
| 8 | 0.11 | 2.50 | 0.55 | 0.009 | 0.001 | 0.041 | 0.53 | 0.020 | 0.23 |
| 9 | 0.09 | 2.50 | 0.60 | 0.011 | 0.002 | 0.070 | 0.45 | 0.018 | 0.20 |
| 10 | 0.08 | 2.55 | 0.55 | 0.012 | 0.001 | 0.041 | 0.42 | 0.022 | 0.20 |
The mechanical property of the embodiment 1-10 products obtained therefroms of table 2
| Embodiment | Tensile strength MPa | Yield strength MPa | Elongation A50% |
| 1 | 1031 | 750 | 11 |
| 2 | 1000 | 600 | 11.5 |
| 3 | 1018 | 616 | 10.5 |
| 4 | 1019 | 645 | 11 |
| 5 | 1020 | 616 | 11 |
| 6 | 1002 | 620 | 12 |
| 7 | 1018 | 620 | 10.5 |
| 8 | 1015 | 610 | 11 |
| 9 | 1005 | 620 | 11 |
| 10 | 1010 | 600 | 10.5 |
Above example is only used to illustrative and not limiting technical scheme, although entering to the present invention with reference to above-described embodiment
Go detailed description, it will be understood by those within the art that：The present invention can still be modified or equally replaced
Change, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should cover will in right of the invention
Ask in the middle of scope.
Claims (10)
- The 1.1000MPa grades of high-strength galvanized steel of two-phase and steel plate, it is characterised in that the galvanized steel and substrate steel sheet chemistry into Divide and weight/mass percentage composition is：C：0.06~0.15%, Mn：2.2~2.8%, Si：0.45~0.65%, Cr：0.40~0.60%, P ≤ 0.012%, S≤0.002%, Als：0.020~0.070%, Ti：0.010~0.030%, Mo：0.15~0.30%, remaining is Fe Not purgeable impurity.
- The preparation method of the 2.1000MPa grades of high-strength galvanized steel of two-phase and steel plate, including heating, hot rolling, cold rolling, continuous zinc coating, Finishing and passivation procedure, it is characterised in that the galvanized steel and substrate steel sheet chemical composition and weight/mass percentage composition are：C： 0.06~0.15%, Mn：2.2~2.8%, Si：0.45~0.65%, Cr：0.40~0.60%, P≤0.012%, S≤0.002%, Als：0.020~0.070%, Ti：0.010~0.030%, Mo：0.15~0.30%, remaining is Fe and not purgeable impurity.
- 3. the preparation method of the high-strength galvanized steel of 1000MPa grades of two-phase according to claim 2 and steel plate, its feature exists In the hot-rolled process, heating-up temperature is 1200~1350 DEG C, and finish rolling finishing temperature is 875~905 DEG C, and coiling temperature is 620 ~750 DEG C.
- 4. the preparation method of the high-strength galvanized steel of 1000MPa grades of two-phase according to claim 2 and steel plate, its feature exists In the cold rolling process, cold rolling reduction ratio >=50%.
- 5. the preparation method of the high-strength galvanized steel of 1000MPa grades of two-phase according to claim 2 and steel plate, its feature exists In the continuous zinc coating operation, soaking temperature is 760~840 DEG C；First slow cooling is to 680~740 DEG C, then is cooled to 420~450 soon ℃；458~462 DEG C of zinc-plated temperature.
- 6. the preparation method of the high-strength galvanized steel of 1000MPa grades of two-phase according to claim 2 and steel plate, its feature exists In the continuous zinc coating operation, annealing soaking time is 100~200s, 10~20 DEG C/s of slow cooling cooldown rate, rapid cooling cooling speed Rate 35~65 DEG C/s, zinc-plated 5~15s of time.
- 7. the preparation method of the high-strength galvanized steel of 1000MPa grades of two-phase according to claim 2 and steel plate, its feature exists In the continuous zinc coating operation, -10 DEG C~+20 DEG C of preheating section dew point ,+8 DEG C of target；- 20 DEG C~+10 DEG C of 1 dew point of bringing-up section, + 5 DEG C of desired value；- 5 DEG C~-30 DEG C of 2 dew point of bringing-up section, -20 DEG C of desired value.
- 8. the 1000MPa grades of high-strength galvanized steel of two-phase according to claim 2-7 any one and the preparation side of steel plate Method, it is characterised in that the finishing operation, finishing elongation percentage is 0.2~0.6%.
- 9. the 1000MPa grades of high-strength galvanized steel of two-phase according to claim 2-7 any one and the preparation side of steel plate Method, it is characterised in that the passivation procedure, 80~120 DEG C of passivation temperature.
- 10. the 1000MPa grades of high-strength galvanized steel of two-phase according to claim 2-7 any one and the preparation side of steel plate Method, it is characterised in that the heating process, heating-up temperature is 1200~1350 DEG C, and total heat time is 90~180min.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101802233A (en) * | 2007-08-15 | 2010-08-11 | 蒂森克虏伯钢铁欧洲股份公司 | Dual phase steel, by the flat product of this dual phase steel preparation and the method for preparing flat product |
| CN102758143A (en) * | 2011-04-25 | 2012-10-31 | 宝山钢铁股份有限公司 | Hot-dip galvanized steel sheet with tensile strength higher than 1180MPa, and manufacturing method thereof |
| CN105803313A (en) * | 2016-04-01 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Thin hot galvanized steel plate and production method thereof |
| CN105950998A (en) * | 2016-07-11 | 2016-09-21 | 攀钢集团攀枝花钢铁研究院有限公司 | 1000 MPa low-carbon hot-galvanized dual-phase steel and preparation method thereof |
-
2017
- 2017-03-01 CN CN201710117509.8A patent/CN106929771B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101802233A (en) * | 2007-08-15 | 2010-08-11 | 蒂森克虏伯钢铁欧洲股份公司 | Dual phase steel, by the flat product of this dual phase steel preparation and the method for preparing flat product |
| CN102758143A (en) * | 2011-04-25 | 2012-10-31 | 宝山钢铁股份有限公司 | Hot-dip galvanized steel sheet with tensile strength higher than 1180MPa, and manufacturing method thereof |
| CN105803313A (en) * | 2016-04-01 | 2016-07-27 | 攀钢集团攀枝花钢铁研究院有限公司 | Thin hot galvanized steel plate and production method thereof |
| CN105950998A (en) * | 2016-07-11 | 2016-09-21 | 攀钢集团攀枝花钢铁研究院有限公司 | 1000 MPa low-carbon hot-galvanized dual-phase steel and preparation method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286023A (en) * | 2018-01-10 | 2018-07-17 | 唐山钢铁集团有限责任公司 | A kind of high manganese superhigh intensity cold rolling galvanized steel of middle carbon and its production method |
| CN108796375A (en) * | 2018-06-28 | 2018-11-13 | 武汉钢铁有限公司 | A kind of tensile strength 1000MPa grades of hot-dip galvanized high-strength steels and its minimizing production method |
| CN109604336A (en) * | 2018-10-24 | 2019-04-12 | 首钢京唐钢铁联合有限责任公司 | Method and device for preparing hot-dip galvanized sheet |
| CN109402546A (en) * | 2018-11-16 | 2019-03-01 | 唐山钢铁集团有限责任公司 | A kind of continuous zinc coating production method for the high-strength steel preventing coating plating leakage |
| CN109504930A (en) * | 2018-12-20 | 2019-03-22 | 唐山钢铁集团有限责任公司 | Tensile strength is greater than the hot-dip galvanizing sheet steel and its production method of 1300MPa |
| CN109735775A (en) * | 2019-02-12 | 2019-05-10 | 唐山不锈钢有限责任公司 | A kind of 1000MPa grades of superhigh-strength hot strip rolling and its production method |
| CN111893378A (en) * | 2020-07-13 | 2020-11-06 | 首钢集团有限公司 | Low-cost high-plasticity cold-rolled galvanized steel plate and preparation method thereof |
| CN112095047A (en) * | 2020-09-07 | 2020-12-18 | 鞍钢股份有限公司 | Cold-rolled hot-dip galvanized DH780 steel with excellent welding performance and preparation method thereof |
| CN112095047B (en) * | 2020-09-07 | 2021-12-24 | 鞍钢股份有限公司 | Cold-rolled hot-dip galvanized DH780 steel with excellent welding performance and preparation method thereof |
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