CN105132816A - 1,000 MPa cold-rolled and annealed dual-phase steel and production method and application thereof - Google Patents
1,000 MPa cold-rolled and annealed dual-phase steel and production method and application thereof Download PDFInfo
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Abstract
The invention discloses 1,000 MPa cold-rolled and annealed dual-phase steel and a production method and application thereof. The 1,000 MPa cold-rolled and annealed dual-phase steel comprises the following chemical constituents in percentage by mass: 0.17-0.23 percent of C, 1.6-2.2 percent of Mn, 0.010 percent or less of S, 0.020 percent or less of P, 0.3-0.6 percent of Si, 0.040-0.060 percent of Nb, 0.040-0.060 percent of Ti, 0.030 percent or more of Als, 0.40-60 percent of Cr, 50 ppm or less of N and the balance of Fe and inevitable impurities. A production process comprises the procedures of hot rolling, cold rolling, annealing and flattening. The 1,000 MPa cold-rolled and annealed dual-phase steel produced according to the production method is used for preparing mechanical anti-collision pieces and reinforcing pieces. The product provided by the invention has the tensile strength above 1,000 MPa and the percentage elongation after fracture above 12%, and has a favorable bake-hardening property.
Description
Technical field
The invention belongs to automobile cold-rolled high tensile steel plate technical field, particularly relate to the cold rolled annealed dual phase steel of a kind of 1000MPa level and production method thereof and purposes.
Background technology
In order to satisfied reduction body of a motor car deadweight reaches the object reducing energy consumption, ensure that the safety performance of vehicle body can not reduce simultaneously, in Automobile Body Design, adopt high-strength steel more and more, especially advanced high-strength steel, wherein dual phase steel is owing to having low yield strength, the excellent performance such as high-tensile and high initial manufacture hardening rate widely uses in automobile component are produced, but along with the raising of steel grade intensity rank, the plasticity of material can corresponding decline, processability declines, therefore, some forming requirements is strict and safety performance requires high occasion, can be increased by suitable thickness with the security increasing component, there is good forming property simultaneously, the requirement of material forming can either be met like this, also loss of weight to a certain degree can be realized.
At present, the successful knowhow about the cold rolled annealed dual phase steel of high intensity levels is not a lot, and thickness specification is all at below 2.0mm, and if publication number is the dual phase steel describing the production of a kind of 1000MPa level annealing way in CN101363099A, thickness is 1.0mm; The steel grade larger for this kind of gauge thickness is produced, the difficulty of cold rolled annealed operation is very large, technique is generally by chill steel band is heated to ferrite and austenitic duplex district, in follow-up rapid cooling, make austenitic transformation be martensite, thus it is large to control difficulty to the transformation of phase in process of cooling, especially think gauge product, need to be optimized design to composition on the one hand, need to regulate thermal treatment process on the other hand, this patent will be devoted to the production problem solving think gauge 1000MPa level dual phase steel.
Summary of the invention
The object of the invention is to provide the cold rolled annealed dual phase steel of a kind of 1000MPa level and production method thereof and purposes, and dual phase steel product thickness is between 2.1 ~ 2.5mm.
For solving the problems of the technologies described above, the technical solution used in the present invention is: provide a kind of 1000MPa level cold rolled annealed dual phase steel, its chemical composition mass percent is as follows: C:0.17 ~ 0.23%, Mn:1.6 ~ 2.2%, S≤0.010%, P≤0.020%, Si:0.3 ~ 0.6%, Nb:0.040 ~ 0.060%, Ti:0.040 ~ 0.060%, Als >=0.030%, Cr:0.40 ~ 0.60%, N≤50ppm, all the other are Fe and inevitable impurity.
The thickness specification of dual phase steel product of the present invention is 2.1 ~ 2.5mm.
The present invention also provides the production method of the cold rolled annealed dual phase steel of a kind of above-mentioned a kind of 1000MPa level, production technique comprise hot rolling, cold rolling, annealing and smooth operation; Adopt the continuously cast bloom of following mass percent chemical composition: C:0.17 ~ 0.23%, Mn:1.6 ~ 2.2%, S≤0.010%, P≤0.020%, Si:0.3 ~ 0.6%, Nb:0.040 ~ 0.060%, Ti:0.040 ~ 0.060%, Als >=0.030%, Cr:0.40 ~ 0.60%, N≤50ppm, all the other are Fe and inevitable impurity.
Hot-rolled process of the present invention: the soaking temperature of strand 1250 ~ 1280 DEG C, soaking time is 25 ~ 35min; Come out of the stove rolling, finishing temperature is 860 ~ 880 DEG C, and adopt leading portion cooling mode, coiling temperature is 550 ~ 650 DEG C.
Cold rolled annealed operation of the present invention: cold rolling draft is 40 ~ 50%, annealing operation soaking temperature is 770 ~ 820 DEG C, and it is 630 ~ 700 DEG C that rapid cooling starts temperature, and aging temp is 250 ~ 300 DEG C, and production technique speed is 50 ~ 90m/min.
Smooth draft≤0.5% of smooth operation of the present invention.
The present invention also provides the purposes of the cold rolled annealed dual phase steel of above-mentioned a kind of 1000MPa level in the anti-striker of processing machinery and stiffener, is particularly useful for preparing automobile anti-striker and stiffener.
Mentality of designing of the present invention:
C: carbon is solution strengthening element, it is the guarantee that material obtains high strength, when carbon content is too low, when identical critical zone (ferrite and austenite) is heated, austenite content is low, be unfavorable for obtaining high intensity, but carbon content is too high, be unfavorable for the welding property of material, therefore the design of carbon is more low better on the basis meeting intensity.Mn: manganese is the element strongly improving austenite hardening capacity, the austenite containing appropriate Mn can obtain the tissue of expectation by different rapid cooling final temperatures, thus obtains the product of different performance.Si: be solution strengthening element, can improve the strength of materials on the one hand, on the other hand, can accelerate carbon to austenite segregation, purification ferrite, thus improves end properties.Nb: be Carbonitride Precipitation element, can crystal grain thinning and separate out carbonitride, improve the strength of materials.Ti: be Carbonitride Precipitation element, for improving the strength of materials.Cr: play strengthening effect on the one hand, is mainly used for the transformation of temperature area bainite in postponing on the other hand, thus is conducive to obtaining martensitic stucture.
The beneficial effect adopting technique scheme to produce is: product tensile strength of the present invention is at more than 1000MPa, and elongation after fracture, more than 12%, has good baking and hardening performance.
Embodiment
Below in conjunction with specific embodiment, the present invention is further detailed explanation.
The chemical composition content of each embodiment steel grade is in table 1, and product mechanical property is in table 2, and during tensile property test, tension specimen is parallel to rolling direction, and the gauge length of tension specimen is 80mm.
Embodiment 1
A kind of 1000MPa level cold rolled annealed two-phase chemical composition mass percent is in table 1, and thickness is 2.1mm.
Production technique comprise hot rolling, cold rolling, annealing and smooth operation.Hot-rolled process: time inside furnace 130min, the soaking temperature of strand 1280 DEG C, soaking time is 28min; Come out of the stove rolling, finishing temperature is 875 DEG C, and adopt leading portion cooling mode, coiling temperature is 550 DEG C.
Cold rolled annealed operation: cold rolling draft is 47.5%, annealing operation soaking temperature is 770 DEG C, and it is 630 DEG C that rapid cooling starts temperature, and aging temp is 280 DEG C, and production technique speed is 90m/min.
The smooth draft 0.5% of smooth operation.
Embodiment 2
A kind of 1000MPa level cold rolled annealed two-phase chemical composition mass percent is in table 1, and thickness is 2.2mm.
Production technique comprise hot rolling, cold rolling, annealing and smooth operation.Hot-rolled process: time inside furnace 120min, the soaking temperature of strand 1280 DEG C, soaking time is 30min; Come out of the stove rolling, finishing temperature is 860 DEG C, and adopt leading portion cooling mode, coiling temperature is 580 DEG C.
Cold rolled annealed operation: cold rolling draft is 45.0%, annealing operation soaking temperature is 810 DEG C, and it is 680 DEG C that rapid cooling starts temperature, and aging temp is 300 DEG C, and production technique speed is 85m/min.
The smooth draft 0.4% of smooth operation.
Embodiment 3
A kind of 1000MPa level cold rolled annealed two-phase chemical composition mass percent is in table 1, and thickness is 2.3mm.
Production technique comprise hot rolling, cold rolling, annealing and smooth operation.Hot-rolled process: time inside furnace 128min, the soaking temperature of strand 1275 DEG C, soaking time is 32min; Come out of the stove rolling, finishing temperature is 870 DEG C, and adopt leading portion cooling mode, coiling temperature is 620 DEG C.
Cold rolled annealed operation: cold rolling draft is 42.5%, annealing operation soaking temperature is 820 DEG C, and it is 700 DEG C that rapid cooling starts temperature, and aging temp is 260 DEG C, and production technique speed is 80m/min.
The smooth draft 0.2% of smooth operation.
Embodiment 4
A kind of 1000MPa level cold rolled annealed two-phase chemical composition mass percent is in table 1, and thickness is 2.4mm.
Production technique comprise hot rolling, cold rolling, annealing and smooth operation.Hot-rolled process: time inside furnace 125min, the soaking temperature of strand 1250 DEG C, soaking time is 25min; Come out of the stove rolling, finishing temperature is 865 DEG C, and adopt leading portion cooling mode, coiling temperature is 630 DEG C.
Cold rolled annealed operation: cold rolling draft is 40.0%, annealing operation soaking temperature is 790 DEG C, and it is 650 DEG C that rapid cooling starts temperature, and aging temp is 250 DEG C, and production technique speed is 70m/min.
The smooth draft 0.3% of smooth operation.
Embodiment 5
A kind of 1000MPa level cold rolled annealed two-phase chemical composition mass percent is in table 1, and thickness is 2.5mm.
Production technique comprise hot rolling, cold rolling, annealing and smooth operation.Hot-rolled process: time inside furnace 128min, the soaking temperature of strand 1270 DEG C, soaking time is 27min; Come out of the stove rolling, finishing temperature is 880 DEG C, and adopt leading portion cooling mode, coiling temperature is 610 DEG C.
Cold rolled annealed operation: cold rolling draft is 50.0%, annealing operation soaking temperature is 800 DEG C, and it is 690 DEG C that rapid cooling starts temperature, and aging temp is 290 DEG C, and production technique speed is 60m/min.
The smooth draft 0.1% of smooth operation.
Embodiment 6
A kind of 1000MPa level cold rolled annealed two-phase chemical composition mass percent is in table 1, and thickness is 2.5mm.
Production technique comprise hot rolling, cold rolling, annealing and smooth operation.Hot-rolled process: time inside furnace 138min, the soaking temperature of strand 1265 DEG C, soaking time is 35min; Come out of the stove rolling, finishing temperature is 860 DEG C, and adopt leading portion cooling mode, coiling temperature is 650 DEG C.
Cold rolled annealed operation: cold rolling draft is 50.0%, annealing operation soaking temperature is 805 DEG C, and it is 640 DEG C that rapid cooling starts temperature, and aging temp is 270 DEG C, and production technique speed is 50m/min.
The smooth draft 0% of smooth operation.
Table 1: the chemical composition (wt%) of steel grade
Table 2: product mechanical property
Claims (8)
1. the cold rolled annealed dual phase steel of 1000MPa level, it is characterized in that: its chemical composition mass percent is as follows: C:0.17 ~ 0.23%, Mn:1.6 ~ 2.2%, S≤0.010%, P≤0.020%, Si:0.3 ~ 0.6%, Nb:0.040 ~ 0.060%, Ti:0.040 ~ 0.060%, Als >=0.030%, Cr:0.40 ~ 0.60%, N≤50ppm, all the other are Fe and inevitable impurity.
2. the cold rolled annealed dual phase steel of a kind of 1000MPa level according to claim 1, is characterized in that, the thickness specification of described dual phase steel product is 2.1 ~ 2.5mm.
3., based on the production method of the cold rolled annealed dual phase steel of a kind of 1000MPa level described in claim 1 or 2, it is characterized in that: production technique comprise hot rolling, cold rolling, annealing and smooth operation; Adopt the continuously cast bloom of following mass percent chemical composition: C:0.17 ~ 0.23%, Mn:1.6 ~ 2.2%, S≤0.010%, P≤0.020%, Si:0.3 ~ 0.6%, Nb:0.040 ~ 0.060%, Ti:0.040 ~ 0.060%, Als >=0.030%, Cr:0.40 ~ 0.60%, N≤50ppm, all the other are Fe and inevitable impurity.
4. production method according to claim 3, is characterized in that: described hot-rolled process: the soaking temperature of strand 1250 ~ 1280 DEG C, and soaking time is 25 ~ 35min; Come out of the stove rolling, finishing temperature is 860 ~ 880 DEG C, and adopt leading portion cooling mode, coiling temperature is 550 ~ 650 DEG C.
5. production method according to claim 3, it is characterized in that: described cold rolled annealed operation: cold rolling draft is 40 ~ 50%, annealing operation soaking temperature is 770 ~ 820 DEG C, it is 630 ~ 700 DEG C that rapid cooling starts temperature, aging temp is 250 ~ 300 DEG C, and production technique speed is 50 ~ 90m/min.
6. production method according to claim 3, is characterized in that: smooth draft≤0.5% of described smooth operation.
7. based on the purposes of the cold rolled annealed dual phase steel of a kind of 1000MPa level in the anti-striker of processing machinery and stiffener described in claim 1 or 2.
8. purposes according to claim 7, for the preparation of automobile anti-striker and stiffener.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714176A (en) * | 2016-04-15 | 2016-06-29 | 唐山钢铁集团有限责任公司 | Production method for cold rolling dual-phase steel base plate |
| CN105950967A (en) * | 2016-06-30 | 2016-09-21 | 唐山钢铁集团有限责任公司 | Method for producing 500MPa level low alloy and high strength steel |
| CN106734246A (en) * | 2016-11-21 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | A kind of method for reducing cold-rolled biphase steel aberration |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07286213A (en) * | 1994-04-18 | 1995-10-31 | Nippon Steel Corp | Production of thick hot coil good in dwtt property |
| CN1888117A (en) * | 2005-06-30 | 2007-01-03 | 宝山钢铁股份有限公司 | Ultra-high strength strip steel and its production process |
| US20080075971A1 (en) * | 2006-09-27 | 2008-03-27 | Weiping Sun | High strength, hot dip coated, dual phase, steel sheet and method of manufacturing same |
| CN101348885A (en) * | 2008-09-11 | 2009-01-21 | 北京科技大学 | 1000MPa grade cold rolling hot dip galvanizing two-phase steel and manufacturing method thereof |
| JP2012077371A (en) * | 2010-10-06 | 2012-04-19 | Sumitomo Metal Ind Ltd | Rolled steel for hot forging, and method for production thereof |
| CN102828119A (en) * | 2011-06-14 | 2012-12-19 | 鞍钢股份有限公司 | High-bending 980MPa cold rolled dual-phase steel and its preparation technology |
-
2015
- 2015-09-07 CN CN201510560043.XA patent/CN105132816A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07286213A (en) * | 1994-04-18 | 1995-10-31 | Nippon Steel Corp | Production of thick hot coil good in dwtt property |
| CN1888117A (en) * | 2005-06-30 | 2007-01-03 | 宝山钢铁股份有限公司 | Ultra-high strength strip steel and its production process |
| US20080075971A1 (en) * | 2006-09-27 | 2008-03-27 | Weiping Sun | High strength, hot dip coated, dual phase, steel sheet and method of manufacturing same |
| CN101348885A (en) * | 2008-09-11 | 2009-01-21 | 北京科技大学 | 1000MPa grade cold rolling hot dip galvanizing two-phase steel and manufacturing method thereof |
| JP2012077371A (en) * | 2010-10-06 | 2012-04-19 | Sumitomo Metal Ind Ltd | Rolled steel for hot forging, and method for production thereof |
| CN102828119A (en) * | 2011-06-14 | 2012-12-19 | 鞍钢股份有限公司 | High-bending 980MPa cold rolled dual-phase steel and its preparation technology |
Non-Patent Citations (3)
| Title |
|---|
| 传统热连轧薄板带钢生产;王廷溥等;《现代轧钢学》;北京：冶金工业出版社;20140831;第245-246页 * |
| 王廷溥等: "《现代轧钢学》", 31 August 2014, 北京：冶金工业出版社 * |
| 高惠临: "《管线钢与管线钢管》", 29 February 2012, 北京：中国石化出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714176A (en) * | 2016-04-15 | 2016-06-29 | 唐山钢铁集团有限责任公司 | Production method for cold rolling dual-phase steel base plate |
| CN105714176B (en) * | 2016-04-15 | 2018-01-16 | 唐山钢铁集团有限责任公司 | A kind of production method of cold-rolled biphase steel substrate |
| CN105950967A (en) * | 2016-06-30 | 2016-09-21 | 唐山钢铁集团有限责任公司 | Method for producing 500MPa level low alloy and high strength steel |
| CN106734246A (en) * | 2016-11-21 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | A kind of method for reducing cold-rolled biphase steel aberration |
| CN106734246B (en) * | 2016-11-21 | 2019-03-05 | 首钢京唐钢铁联合有限责任公司 | A method of reducing cold-rolled biphase steel color difference |
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Application publication date: 20151209 |