CN109082599A - The method of the elongation percentage of hot forming steel plate and raising hot forming steel plate - Google Patents
The method of the elongation percentage of hot forming steel plate and raising hot forming steel plate Download PDFInfo
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- CN109082599A CN109082599A CN201811050163.5A CN201811050163A CN109082599A CN 109082599 A CN109082599 A CN 109082599A CN 201811050163 A CN201811050163 A CN 201811050163A CN 109082599 A CN109082599 A CN 109082599A
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- Prior art keywords
- steel plate
- hot forming
- forming steel
- temperature
- rolling
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005096 rolling process Methods 0.000 claims abstract description 18
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 11
- 238000010583 slow cooling Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 6
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 4
- 150000002910 rare earth metals Chemical class 0.000 abstract description 4
- 238000005457 optimization Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 229910000712 Boron steel Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
-
- 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
-
- 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
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The present invention provides a kind of methods of hot forming steel plate and the elongation percentage for improving hot forming steel plate, wherein hot forming steel plate, by percentage to the quality, chemical component are as follows: C0.18-0.23%, Si0.10-0.25%, Mn 1.0-1.3%, P≤0.015%, S≤0.01%, Ti0.01-0.05%, B0.0010-0.0035%, Cr0.10-0.30%, La0.0015-0.0025%, surplus are Fe and inevitable impurity.According to the technical solution of the present invention, by the way that rare earth La, the gentle cold treatment process of optimization rolling are added in steel, a kind of steel plate new material of high-strength high-elongation is obtained.
Description
Technical field
The present invention relates to metallurgical technology fields, in particular to a kind of hot forming steel plate and a kind of raising hot forming steel
The method of the elongation percentage of plate.
Background technique
In order to improve the crashworthiness of vehicle body and meet the requirement of automobile loss of weight, hot forming steel answering on the body of a car
With more and more extensively.Since the steel of hot forming containing B has the spies such as intensity is high, material under high temperature plasticity is good, forming capacity is strong, springback capacity is low
Point, so that its demand in automobile market constantly increases.It is mainly used in door anti-collision joist, center beam of bumper, side girders, A column B
The fields such as column reinforcer.The mechanical property especially elongation percentage for improving B system hot forming steel has the safety of automobilism great
Meaning.
The SSAB company development and production of the external Sweden hot rolling boron plate of Domex series, Mittal Steel's exploitation
The hot rolling boron plate of Docal series is all by adding microalloy in steel grade and burning optimization on line technique is had excellent performance
Automobile sheet material, be widely used in the several sedans such as domestic Sagitar, Magotan, Bora, Audi A column, B column, front and back insurance
The production of the stamping parts such as thick stick.
In order to make car anti-collision hot forming boron steel technology produce at home in popularization and application, need exploitation have Gao Yan
Stretch the hot forming steel plate of rate
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, it is an object of the present invention to provide a kind of hot forming steel plates.
It is another object of the present invention to provide a kind of methods of elongation percentage for improving hot forming steel plate.
In view of this, the technical solution of first aspect present invention provides a kind of hot forming steel plate, by percentage to the quality,
Its chemical component are as follows: C0.18-0.23%, Si0.10-0.25%, Mn 1.0-1.3%, P≤0.015%, S≤0.01%,
Ti0.01-0.05%, B0.0010-0.0035%, Cr0.10-0.30%, La0.0015-0.0025%, surplus are Fe and can not
The impurity avoided.
The technical solution of second aspect of the present invention proposes a kind of method of elongation percentage for improving hot forming steel plate, comprising:
Heating temperature be 1150-1250 DEG C, soaking time 1-6 hours, 1050-1150 DEG C of breaking down temperature, 900-950 DEG C of final rolling temperature,
750 DEG C of finishing temperature or more, two sections of rolling overall reduction >=75%, average on-line cooling rate is greater than 35 DEG C/S.
Further, after billet rolling is at plate, slow cooling processing is carried out, the time for being cooled to room temperature from finishing temperature is not small
In 36 hours.
Further, the elongation percentage of the hot forming steel plate is 25% ± 3%.
One or more technical solution provided by the invention, has at least the following technical effects or advantages:
By the way that rare earth La is added in steel, optimization rolls the cold treatment process that eases up, and obtains a kind of steel of high-strength high-elongation
Plate new material.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Specific embodiment
In order to be more clearly understood that aforementioned aspect of the present invention, feature and advantage, With reference to embodiment
The present invention is further described in detail.It should be noted that in the absence of conflict, embodiments herein and reality
The feature applied in example can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
The hot forming steel plate of embodiment according to the present invention, by percentage to the quality, chemical component are as follows: C0.18-
0.23%, Si0.10-0.25%, Mn 1.0-1.3%, P≤0.015%, S≤0.01%, Ti0.01-0.05%, B0.0010-
0.0035%, Cr0.10-0.30%, La0.0015-0.0025%, surplus are Fe and inevitable impurity.
The method of the elongation percentage of the raising hot forming steel plate of embodiment according to the present invention, comprising: heating temperature 1150-
1250 DEG C, soaking time 1-6 hours, 1050-1150 DEG C of breaking down temperature, 900-950 DEG C of final rolling temperature, 750 DEG C of finishing temperature with
On, two sections of rolling overall reduction >=75%, average on-line cooling rate is greater than 35 DEG C/S.
Further, after billet rolling is at plate, slow cooling processing is carried out, the time for being cooled to room temperature from finishing temperature is not small
In 36 hours
Further, the elongation percentage of the hot forming steel plate is 25% ± 3%.
Rare earth La is added as alloying element, and on the one hand can go bad steel inclusion and improvement inclusion morphology, improves steel
Pure property；On the other hand the start temperature and final temperature that martensite transfor mation can be changed, reduce retained austenite quantity in steel,
The fine structure for obtaining martensite, changes the microstructure morphology of steel.
Rare earth La is added in steel, using the steel plate of controlled rolling and Controlled cooling process production thickness 2-6mm, then to steel
Plate carries out slow cooling processing, and the time for being cooled to room temperature from final cooling temperature is not less than 36 hours, so that excellent mechanical property is obtained,
Tensile strength reaches 580-700MPa, yield strength 420-610MPa, and compared with controlled rolling state sample, elongation percentage is significantly improved, by
15 ± 3% originally are increased to 25 ± 3%.
Specific embodiment
Embodiment 1
The chemical component and content (weight percent) of steel plate are as follows: C0.211%, Si0.120%, Mn1.21%,
P0.0122%, S0.004%, Ti0.022%, B0.0016%, Cr0.16%, La0.0021%, surplus is for Fe and unavoidably
Impurity.Rolling and retarded cooling process are shown in Table 1, and mechanics properties testing value is shown in Table 2.
The rolling of table 1 and retarded cooling process
2 mechanical property of table
| Whether slow cooling is used | ReH(MPa) | Rm(MPa) | A (%) |
| It is no | 567 | 970 | 12.5 |
| It is | 543 | 621 | 25.0 |
Embodiment 2
The chemical component and content (weight percent) of steel plate are as follows: C0.20%, Si 0.11%, Mn 1.08%,
P0.0128%, S0.007%, Ti0.024%, B0.0012%, Cr0.158%, La0.0023%, surplus are Fe and can not keep away
The impurity exempted from.Rolling and retarded cooling process are shown in Table 3, and mechanics properties testing value is shown in Table 4.
The rolling of table 3 and retarded cooling process
4 mechanical property of table
| Whether slow cooling is used | ReH(MPa) | Rm(MPa) | A (%) |
| It is no | 536 | 872 | 12.0 |
| It is | 525 | 599 | 29.5 |
Embodiment 3
The chemical component and content (weight percent) of steel plate are as follows: C0.198%, Si0.13%, Mn1.10%,
P0.0132%, S0.009%, Ti0.023%, B0.00128%, Cr0.178%, La0.0019%, surplus are Fe and can not keep away
The impurity exempted from.Rolling and retarded cooling process are shown in Table 5, and mechanics properties testing value is shown in Table 6.
The rolling of table 5 and retarded cooling process
6 mechanical property of table
| Whether slow cooling is used | ReH(MPa) | Rm(MPa) | A (%) |
| It is no | 530 | 718 | 18.0 |
| It is | 511 | 616 | 27.0 |
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of hot forming steel plate, which is characterized in that by percentage to the quality, chemical component are as follows: C0.18-0.23%,
Si0.10-0.25%, Mn1.0-1.3%, P≤0.015%, S≤0.01%, Ti0.01-0.05%, B0.0010-
0.0035%, Cr0.10-0.30%, La0.0015-0.0025%, surplus are Fe and inevitable impurity.
2. a kind of method for the elongation percentage for improving hot forming steel plate described in claim 1 characterized by comprising
Heating temperature be 1150-1250 DEG C, soaking time 1-6 hours, 1050-1150 DEG C of breaking down temperature, final rolling temperature 900-950
DEG C, 750 DEG C of finishing temperature or more, two sections of rolling overall reduction >=75%, average on-line cooling rate is greater than 35 DEG C/S.
3. the production method of hot forming steel plate according to claim 2, which is characterized in that after billet rolling is at plate, into
Row slow cooling processing is cooled to the time of room temperature not less than 36 hours from finishing temperature.
4. the production method of hot forming steel plate according to claim 3, which is characterized in that the extension of the hot forming steel plate
Rate is 25% ± 3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811050163.5A CN109082599A (en) | 2018-09-10 | 2018-09-10 | The method of the elongation percentage of hot forming steel plate and raising hot forming steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811050163.5A CN109082599A (en) | 2018-09-10 | 2018-09-10 | The method of the elongation percentage of hot forming steel plate and raising hot forming steel plate |
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| Publication Number | Publication Date |
|---|---|
| CN109082599A true CN109082599A (en) | 2018-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811050163.5A Pending CN109082599A (en) | 2018-09-10 | 2018-09-10 | The method of the elongation percentage of hot forming steel plate and raising hot forming steel plate |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275200A (en) * | 2008-05-21 | 2008-10-01 | 钢铁研究总院 | Hotforming martensitic steel |
| CN101713046A (en) * | 2009-12-14 | 2010-05-26 | 钢铁研究总院 | Preparation method of superfine grain martensitic steel reinforced and controlled by nano precipitated phase |
| US7842142B1 (en) * | 2004-09-15 | 2010-11-30 | Nippon Steel Corporation | High strength part and method for producing the same |
| CN104195443A (en) * | 2014-05-19 | 2014-12-10 | 首钢总公司 | High-flexural-behavior hot-formed steel used for automobiles and manufacturing method thereof |
| CN104928568A (en) * | 2015-06-30 | 2015-09-23 | 宝山钢铁股份有限公司 | Ferrite low-density high-strength steel and manufacturing method thereof |
| US20160312325A1 (en) * | 2013-12-27 | 2016-10-27 | Nippon Steel & Sumitomo Metal Corporation | Hot-pressed steel sheet member, method of manufacturing the same, and steel sheet for hot pressing |
-
2018
- 2018-09-10 CN CN201811050163.5A patent/CN109082599A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7842142B1 (en) * | 2004-09-15 | 2010-11-30 | Nippon Steel Corporation | High strength part and method for producing the same |
| CN101275200A (en) * | 2008-05-21 | 2008-10-01 | 钢铁研究总院 | Hotforming martensitic steel |
| CN101713046A (en) * | 2009-12-14 | 2010-05-26 | 钢铁研究总院 | Preparation method of superfine grain martensitic steel reinforced and controlled by nano precipitated phase |
| US20160312325A1 (en) * | 2013-12-27 | 2016-10-27 | Nippon Steel & Sumitomo Metal Corporation | Hot-pressed steel sheet member, method of manufacturing the same, and steel sheet for hot pressing |
| CN104195443A (en) * | 2014-05-19 | 2014-12-10 | 首钢总公司 | High-flexural-behavior hot-formed steel used for automobiles and manufacturing method thereof |
| CN104928568A (en) * | 2015-06-30 | 2015-09-23 | 宝山钢铁股份有限公司 | Ferrite low-density high-strength steel and manufacturing method thereof |
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Application publication date: 20181225 |
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