CN106929765A - A kind of 280MPa grades of ultra-deep punching strip and its production method - Google Patents
A kind of 280MPa grades of ultra-deep punching strip and its production method Download PDFInfo
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- CN106929765A CN106929765A CN201710053109.5A CN201710053109A CN106929765A CN 106929765 A CN106929765 A CN 106929765A CN 201710053109 A CN201710053109 A CN 201710053109A CN 106929765 A CN106929765 A CN 106929765A
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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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- 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
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
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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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- 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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Abstract
The invention discloses a kind of 280MPa grades of ultra-deep punching strip and its production method, the strip strand composition and its mass content are as follows：C≤0.0030%, Si≤0.02%, Mn：0.07~0.15%, P≤0.012%, S≤0.012%, B≤0.0005%, N≤0.0045%, Als：0.023~0.050%, Ti：0.030~0.045%, Cr≤0.04%, remaining is Fe and inevitable impurity.Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation.Ultra-low carbon high-strength steel removes the interstitial atom in steel using Ti alloyings in the present invention, by adjusting component design, steel-making, continuous casting, hot rolling, cold rolling, continuous zinc coating and finishing process parameter, successfully produces ultra-deep punching galvanized steel.Strip 280~290MPa of tensile strength, 140~160MPa of yield strength, elongation percentage >=45%, with good punch forming performance.
Description
Technical field
The invention belongs to iron and steel smelting technology field, and in particular to a kind of 280MPa grades of ultra-deep punching strip and its producer
Method.
Background technology
In order to reach car loss of weight, energy-conservation, corrosion resistance and the requirement of security, the car industry of various countries is widely used
High intensity and extra deep drawing sheet steel and surface treated steel plate, develop the kind that many new ultra-deep rush strip.With deep-draw and
The development of extra deep drawing sheet steel, develops superelevation deep-draw level steel plate again.The r values of such steel plate are 2.5, and elongation percentage is 51%, timeliness
Index is fairly good.From the point of view of the nearly 40 years processes of domestic and international Automobile Plate development, extra deep drawing sheet steel is to high-cleanness, Ultra-low carbon and micro-
Alloy direction is developed.
The development of domestic automobile steel plate develops with domestic automobile industrial expansion.It is complete that production is had been able at present
Portion regular tenacity YS<CQ grades, the punching press DQ grades and deep-draw DDQ grades steel plate of 180MPa, and manufactured experimently ultra-deep rush level EDDQ grades,
SEDDQ grades and some high intensity BH steel, phosphorated steel etc., the autobody sheet of production can substantially meet the need of production lorry
Will, and can partly be used for forming property to steel plate, surface quality and Spraying technique etc. and require Automotive higher.
Much better than paint or plastic layer to the protecting effect of steel of hot galvanized layer, during galvanizing, send out between zinc and steel
Raw diffusion, generates iron zinc intermetallic compounds layer, i.e. alloy-layer.Metallurgical binding is between alloy-layer and steel and zinc, than
The combination of paint class and steel is more firm.Be will not fall off in hot galvanized layer many decades in atmospheric environment, until by completely certainly
So corrosion.
When zinc coat has small crackle or breakage, zinc will continue to prevent the steel of crackle or breakage in the form of sacrificial anode
Iron gets rusty, and this is the zinc coat main feature more superior than other coatings.Fe-zn alloy layer containing zinc more than 90%, have to steel with
The approximate electro-chemical protection of zinc；And fe-zn alloy layer hardness is more much higher than pure zinc, thus coating Collision-free and scrape damage
Ability it is higher.Greatly, production cost is high, and qualification rate is low, this patent for the current production method difficulty for rushing galvanized steel on ultra-deep
The method that ultra-deep punching strip is produced using continuous zinc coating mode is proposed, production cost is greatly reduced, product is improve
Qualification rate.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of 280MPa grades of ultra-deep punching strip, present invention also offers one
Plant a kind of production method of 280MPa grades of ultra-deep punching strip.The process is simple, low cost, 280MPa grades of continuous zinc coating production
Ultra-deep punching is good with strip anticorrosion effect.
In order to solve the above technical problems, the present invention provides a kind of 280MPa grade ultra-deep punching strip, the strip it is chemical into
Divide and weight/mass percentage composition is as follows：C≤0.0030%, Si≤0.02%, Mn：0.07~0.15%, P≤0.012%, S≤0.012%,
B≤0.0005%, N≤0.0045%, Als：0.023~0.050%, Ti：0.030~0.045%, Cr≤0.04%, remaining be Fe and
Inevitable impurity.
Present invention also offers a kind of above-mentioned production method of 280MPa grades of ultra-deep punching strip, the production method includes
Steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, the weight/mass percentage composition of the strand composition is：C≤
0.0030%, Si≤0.02%, Mn：0.07~0.15%, P≤0.012%, S≤0.012%, B≤0.0005%, N≤0.0045%,
Als：0.023~0.050%, Ti：0.030~0.045%, Cr≤0.04%, remaining is Fe and inevitable impurity.
Heating process of the present invention, using stepped heating stove heat, the heating-up temperature of soaking zone strand for 1050~
1250 DEG C, total heat time is 90-150min；Temperature difference≤25 DEG C on continuous casting billet length and width direction, continuous casting billet goes out furnace temperature
Spend is 1040~1230 DEG C.
Hot-rolled process of the present invention includes roughing, finish rolling, controls cold and coiling process.
Hot-rolled process of the present invention, is cooled down using leading portion, and the finishing temperature of finish rolling is 900~950 DEG C, and coiling temperature is
680~720 DEG C.
Cold rolling process of the present invention, reduction ratio >=75%.
Continuous zinc coating operation of the present invention, using degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique.
Continuous zinc coating operation of the present invention, wherein holding temperature are 830~850 DEG C, slow cooling end temp 600~720
DEG C, 440~490 DEG C of rapid cooling end temp, 430~475 DEG C of zinc-plated temperature.
Finishing operation of the present invention, finishing elongation percentage is 0.5~1.2%.
Continuous zinc coating operation of the present invention, 100~200s of soaking time, rapid cooling section 20~60 DEG C/s of cooldown rate, plating
4~15s of zinc time.
It is using the beneficial effect produced by above-mentioned technical proposal：1st, during the present invention removes steel using Ti alloyings
Interstitial atom, adds Ti elements, separates out Ti (C, N) compound of tiny Dispersed precipitate, improves intensity, improves secondary fragility,
Interstitial atom C and N in fixed steel, finished product have excellent mechanical performance and processability, tensile strength in more than 280MPa,
And without Aging Characteristic, it is with low cost.2nd, the present invention by adjusting component design, steel-making, continuous casting, hot rolling, cold rolling, continuous zinc coating and
Finishing process parameter, successfully produces ultra-deep punching galvanized steel, and the technique can effectively reduce ultra-deep and rush galvanized steel
Production cost, improve production efficiency improves the antiseptic power of strip, stable production process.3rd, the present invention is joined by above-mentioned technique
The strip of number production：Tensile strength is between 280~290MPa, and the MPa of yield strength 140~160, elongation percentage >=45%, processing is hard
Change Index n Value >=0.22, Lankford r value >=2.3, with good punch forming performance.
The inventive method uses new composition design, by controlling the techniques such as hot rolling, cold rolling and continuous zinc coating and finishing
Parameter is come the method that produces ultra-deep punching strip；Smaller with enforcement difficulty, cost is relatively low, stable production process, end properties
Excellent the characteristics of.
Specific embodiment
With reference to specific embodiment, the present invention is further detailed explanation.
The method that continuous zinc coating of the present invention produces 280MPa grades of ultra-deep punching strip is as follows：
Using the strand of chemical composition described in table 1, heated, hot rolling, cold rolling, continuous zinc coating and finishing operation are prepared from；Plus
Thermal technology's sequence uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1050~1250 DEG C, and total heat time is 90
~150 minutes；Hot-rolled process is cooled down using leading portion, and finishing temperature is 900~950 DEG C, and coiling temperature is 680~720 DEG C；It is cold rolling
Cold roling reduction >=75% of operation；830~850 DEG C of continuous zinc coating operation holding temperature, 458~462 DEG C of zinc-plated temperature；Finishing
The finishing elongation percentage of operation is 0.5~1.2%.Each embodiment gained ultra-deep rushes strip carries out performance detection, and sample marking distance is
80mm, the width of parallel-segment is 25mm, and the mechanical property that detection is obtained is shown in Table 2.
Embodiment 1
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1180 DEG C, total heating
Time is 120min；23 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1230 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 920 DEG C,
Coiling temperature is 710 DEG C.
4）Cold rolling process：Reduction ratio 75%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
841 DEG C, soaking time 150s；700 DEG C of slow cooling end temp, 450 DEG C of rapid cooling end temp, 55 DEG C/s of rapid cooling section cooldown rate；
460 DEG C of zinc-plated temperature, zinc-plated time 10s.
6）Finishing operation, finishing elongation percentage is 0.55%.
Embodiment 2
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1170 DEG C, total heating
Time is 100min；25 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1200 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 900 DEG C,
Coiling temperature is 720 DEG C.
4）Cold rolling process：Reduction ratio 83%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
840 DEG C, soaking time 200s；650 DEG C of slow cooling end temp, 440 DEG C of rapid cooling end temp, 60 DEG C/s of rapid cooling section cooldown rate；
462 DEG C of zinc-plated temperature, zinc-plated time 15s.
6）Finishing operation, finishing elongation percentage is 0.50%.
Embodiment 3
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1190 DEG C, total heating
Time is 90min；20 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1180 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 930 DEG C,
Coiling temperature is 690 DEG C.
4）Cold rolling process：Reduction ratio 75%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
850 DEG C, soaking time 100s；720 DEG C of slow cooling end temp, 490 DEG C of rapid cooling end temp, 46 DEG C/s of rapid cooling section cooldown rate；
460 DEG C of zinc-plated temperature, zinc-plated time 4s.
6）Finishing operation, finishing elongation percentage is 1.10%.
Embodiment 4
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1160 DEG C, total heating
Time is 140min；20 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1150 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 910 DEG C,
Coiling temperature is 700 DEG C.
4）Cold rolling process：Reduction ratio 85%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
840 DEG C, soaking time 150s；640 DEG C of slow cooling end temp, 450 DEG C of rapid cooling end temp, 50 DEG C/s of rapid cooling section cooldown rate；
458 DEG C of zinc-plated temperature, zinc-plated time 10s.
6）Finishing operation, finishing elongation percentage is 1.00%.
Embodiment 5
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1185 DEG C, total heating
Time is 130min；15 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1150 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 900 DEG C,
Coiling temperature is 690 DEG C.
4）Cold rolling process：Reduction ratio 78%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
840 DEG C, soaking time 140s；680 DEG C of slow cooling end temp, 450 DEG C of rapid cooling end temp, 50 DEG C/s of rapid cooling section cooldown rate；
460 DEG C of zinc-plated temperature, zinc-plated time 10s.
6）Finishing operation, finishing elongation percentage is 0.90%.
Embodiment 6
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1200 DEG C, total heating
Time is 110min；20 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1150 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 920 DEG C,
Coiling temperature is 690 DEG C.
4）Cold rolling process：Reduction ratio 78%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
840 DEG C, soaking time 150s；680 DEG C of slow cooling end temp, 450 DEG C of rapid cooling end temp, 50 DEG C/s of rapid cooling section cooldown rate；
460 DEG C of zinc-plated temperature, zinc-plated time 10s.
6）Finishing operation, finishing elongation percentage is 0.65%.
Embodiment 7
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1175 DEG C, total heating
Time is 120min；20 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1150 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 925 DEG C,
Coiling temperature is 700 DEG C.
4）Cold rolling process：Reduction ratio 86%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
842 DEG C, soaking time 150s；680 DEG C of slow cooling end temp, 450 DEG C of rapid cooling end temp, 45 DEG C/s of rapid cooling section cooldown rate；
460 DEG C of zinc-plated temperature, zinc-plated time 12s.
6）Finishing operation, finishing elongation percentage is 0.80%.
Embodiment 8
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1170 DEG C, total heating
Time is 130min；20 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1150 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 900 DEG C,
Coiling temperature is 680 DEG C.
4）Cold rolling process：Reduction ratio 80%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
845 DEG C, soaking time 150s；680 DEG C of slow cooling end temp, 450 DEG C of rapid cooling end temp, 45 DEG C/s of rapid cooling section cooldown rate；
460 DEG C of zinc-plated temperature, zinc-plated time 10s.
6）Finishing operation, finishing elongation percentage is 0.70%.
Embodiment 9
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1190 DEG C, total heating
Time is 150min；15 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1180 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 925 DEG C,
Coiling temperature is 695 DEG C.
4）Cold rolling process：Reduction ratio 76%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
843 DEG C, soaking time 150s；690 DEG C of slow cooling end temp, 460 DEG C of rapid cooling end temp, 47 DEG C/s of rapid cooling section cooldown rate；
460 DEG C of zinc-plated temperature, zinc-plated time 9s.
6）Finishing operation, finishing elongation percentage is 0.50%.
Embodiment 10
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1165 DEG C, total heating
Time is 100min；20 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1180 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 915 DEG C,
Coiling temperature is 715 DEG C.
4）Cold rolling process：Reduction ratio 77%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
840 DEG C, soaking time 150s；690 DEG C of slow cooling end temp, 450 DEG C of rapid cooling end temp, 47 DEG C/s of rapid cooling section cooldown rate；
460 DEG C of zinc-plated temperature, zinc-plated time 9s.
6）Finishing operation, finishing elongation percentage is 0.60%.
Embodiment 11
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1250 DEG C, total heating
Time is 95min；20 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1200 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 935 DEG C,
Coiling temperature is 685 DEG C.
4）Cold rolling process：Reduction ratio 85%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
830 DEG C, soaking time 200s；600 DEG C of slow cooling end temp, 440 DEG C of rapid cooling end temp, 20 DEG C/s of rapid cooling section cooldown rate；
460 DEG C of zinc-plated temperature, zinc-plated time 4s.
6）Finishing operation, finishing elongation percentage is 0.50%.
Embodiment 12
280MPa grades of ultra-deep punching strip, chemical composition and weight/mass percentage composition are shown in Table 1, and mechanical property is shown in Table 2.
Production method includes steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, comprises the following steps that：
1）Steel-making and continuous casting working procedure：Molten steel obtains continuous casting billet through smelting continuous casting working procedure；
2）Heating process：Continuous casting billet uses stepped heating stove heat, and the heating-up temperature of soaking zone strand is 1050 DEG C, total heating
Time is 145min；25 DEG C of temperature difference on continuous casting billet length and width direction, continuous casting billet tapping temperature is 1040 DEG C.
3）Hot-rolled process：Including roughing, finish rolling, control cold and coiling process；Cooled down using leading portion, finishing temperature is 950 DEG C,
Coiling temperature is 718 DEG C.
4）Cold rolling process：Reduction ratio 75%.
5）Continuous zinc coating operation, including degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique；Holding temperature is
850 DEG C, soaking time 100s；720 DEG C of slow cooling end temp, 490 DEG C of rapid cooling end temp, 60 DEG C/s of rapid cooling section cooldown rate；
460 DEG C of zinc-plated temperature, zinc-plated time 15s.
6）Finishing operation, finishing elongation percentage is 1.20%.
The chemical composition of the embodiment 1-12 strands of table 1（wt%）
The mechanical property of the embodiment 1-12 products obtained therefroms of table 2
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)
1. a kind of 280MPa grades of ultra-deep punching strip, it is characterised in that the band steel chemical composition and weight/mass percentage composition are as follows：
C≤0.0030%, Si≤0.02%, Mn：0.07~0.15%, P≤0.012%, S≤0.012%, B≤0.0005%, N≤
0.0045%, Als：0.023~0.050%, Ti：0.030~0.045%, Cr≤0.04%, remaining is Fe and inevitable impurity.
2., based on a kind of 280MPa grades of production method of ultra-deep punching strip described in claim 1, the production method includes
Steel-making, continuous casting, heating, hot rolling, cold rolling, continuous zinc coating and finishing operation, it is characterised in that the quality percentage of the strand composition
Content is：C≤0.0030%, Si≤0.02%, Mn：0.07~0.15%, P≤0.012%, S≤0.012%, B≤0.0005%, N≤
0.0045%, Als：0.023~0.050%, Ti：0.030~0.045%, Cr≤0.04%, remaining is Fe and inevitable impurity.
3. production method according to claim 2, it is characterised in that the heating process, using walking beam furnace plus
Heat, the heating-up temperature of soaking zone strand is 1050~1250 DEG C, and total heat time is 90-150min；Continuous casting billet length and width
Temperature difference≤25 DEG C on direction, continuous casting billet tapping temperature is 1040~1230 DEG C.
4. production method according to claim 2, it is characterised in that the hot-rolled process include roughing, finish rolling, control it is cold and
Coiling process.
5. production method according to claim 2, it is characterised in that the hot-rolled process, is cooled down using leading portion, finish rolling
Finishing temperature is 900~950 DEG C, and coiling temperature is 680~720 DEG C.
6. the production method according to claim 2-5 any one, it is characterised in that the cold rolling process, reduction ratio >=
75%。
7. the production method according to claim 2-5 any one, it is characterised in that the continuous zinc coating operation, uses
Degreasing, heating, soaking, slow cooling, rapid cooling, zinc-plated, cooling technique.
8. the production method according to claim 2-5 any one, it is characterised in that the continuous zinc coating operation, its
Middle holding temperature is 830~850 DEG C, 600~720 DEG C of slow cooling end temp, 440~490 DEG C of rapid cooling end temp, zinc-plated temperature
430~475 DEG C.
9. the production method according to claim 2-5 any one, it is characterised in that the finishing operation, finishing is prolonged
It is 0.5~1.2% to stretch rate.
10. the production method according to claim 2-5 any one, it is characterised in that the continuous zinc coating operation, protects
Warm 100~200s of time, rapid cooling section cooldown rate 20~60 DEG C/s, zinc-plated 4~15s of time.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113416827A (en) * | 2021-05-31 | 2021-09-21 | 北京首钢股份有限公司 | Hot-dip galvanized IF steel with high elongation and excellent coating performance and preparation method thereof |
| CN115386806A (en) * | 2022-09-13 | 2022-11-25 | 攀钢集团研究院有限公司 | Production method of hot-dip galvanized steel sheet suitable for high-speed continuous stamping and hot-dip galvanized steel sheet |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032556A (en) * | 1987-09-14 | 1989-04-26 | 川崎制铁株式会社 | Hot-rolled steel sheet and production method thereof |
| CN1064320A (en) * | 1991-01-25 | 1992-09-09 | 日本钢管株式会社 | Nickelalloy with excellent punching formation property and bonderizing is electroplated cold-rolled steel sheet and manufacture method thereof |
| CN1115183A (en) * | 1993-10-05 | 1996-01-17 | 日本钢管株式会社 | Continuously annealed and cold rolled steel sheet |
| CN1192481A (en) * | 1997-02-10 | 1998-09-09 | 川崎制铁株式会社 | Cold rolled steel plate having excellent deep drawability and time limitation resistance, and method for mfg. same |
| CN101255529A (en) * | 2008-03-06 | 2008-09-03 | 武汉钢铁(集团)公司 | High plastic-strain ratio galvanized steel sheet and production method |
| CN101275196A (en) * | 2007-03-27 | 2008-10-01 | 宝山钢铁股份有限公司 | Steel for seamless tin and manufacturing method thereof |
| CN103589953A (en) * | 2013-11-07 | 2014-02-19 | 武汉钢铁(集团)公司 | Hot rolled thin plate enamel steel with 245-MPa yield strength and manufacturing method thereof |
| CN103627957A (en) * | 2013-10-14 | 2014-03-12 | 首钢总公司 | Steel for CR4 hot dip galvanized automobile sheets and production method thereof |
-
2017
- 2017-01-24 CN CN201710053109.5A patent/CN106929765A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032556A (en) * | 1987-09-14 | 1989-04-26 | 川崎制铁株式会社 | Hot-rolled steel sheet and production method thereof |
| CN1064320A (en) * | 1991-01-25 | 1992-09-09 | 日本钢管株式会社 | Nickelalloy with excellent punching formation property and bonderizing is electroplated cold-rolled steel sheet and manufacture method thereof |
| CN1115183A (en) * | 1993-10-05 | 1996-01-17 | 日本钢管株式会社 | Continuously annealed and cold rolled steel sheet |
| CN1192481A (en) * | 1997-02-10 | 1998-09-09 | 川崎制铁株式会社 | Cold rolled steel plate having excellent deep drawability and time limitation resistance, and method for mfg. same |
| CN101275196A (en) * | 2007-03-27 | 2008-10-01 | 宝山钢铁股份有限公司 | Steel for seamless tin and manufacturing method thereof |
| CN101255529A (en) * | 2008-03-06 | 2008-09-03 | 武汉钢铁(集团)公司 | High plastic-strain ratio galvanized steel sheet and production method |
| CN103627957A (en) * | 2013-10-14 | 2014-03-12 | 首钢总公司 | Steel for CR4 hot dip galvanized automobile sheets and production method thereof |
| CN103589953A (en) * | 2013-11-07 | 2014-02-19 | 武汉钢铁(集团)公司 | Hot rolled thin plate enamel steel with 245-MPa yield strength and manufacturing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113416827A (en) * | 2021-05-31 | 2021-09-21 | 北京首钢股份有限公司 | Hot-dip galvanized IF steel with high elongation and excellent coating performance and preparation method thereof |
| CN113416827B (en) * | 2021-05-31 | 2023-02-24 | 北京首钢股份有限公司 | Hot-dip galvanized IF steel with high elongation and excellent coating performance and preparation method thereof |
| CN115386806A (en) * | 2022-09-13 | 2022-11-25 | 攀钢集团研究院有限公司 | Production method of hot-dip galvanized steel sheet suitable for high-speed continuous stamping and hot-dip galvanized steel sheet |
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