WO2009099079A1 - 加工性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法 - Google Patents
加工性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法 Download PDFInfo
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- WO2009099079A1 WO2009099079A1 PCT/JP2009/051824 JP2009051824W WO2009099079A1 WO 2009099079 A1 WO2009099079 A1 WO 2009099079A1 JP 2009051824 W JP2009051824 W JP 2009051824W WO 2009099079 A1 WO2009099079 A1 WO 2009099079A1
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- steel sheet
- galvanized steel
- dip galvanized
- hot
- martensite
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C—CHEMISTRY; METALLURGY
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0426—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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
- C21D8/0436—Cold 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
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0447—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment
- C21D8/0463—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the heat treatment following hot rolling
-
- 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
- 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
- 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
- C21D2211/002—Bainite
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12785—Group IIB metal-base component
- Y10T428/12792—Zn-base component
- Y10T428/12799—Next to Fe-base component [e.g., galvanized]
Definitions
- the present invention is a high-strength hot-dip galvanized steel sheet with excellent workability used in industrial fields such as automobiles and electricity.
- the tensile strength TS is 1200 MPa or more and the stretch E1 is 13 ° /.
- the above description relates to a method of manufacturing high strength hot-dip galvanized steel sheets with a hole expansion ratio of 50% or more, which is an index of elongation flangeability.
- Patent Document 2 states that, in mass%, C: 0.01 to 0.20 ° Si: l. 5% or less, Mn: 0.01 to 3 ° /. , P: 0.0010 to 0.1 ° S: 0. 0010 to 0.05%, ⁇ 1: 0.005 to 4%, Mo: 0.01 to 5.0%, Nb: 0.
- Patent Document 1 JP-A-11-279691
- Patent Document 2 JP 2003-193190 A Disclosure of the Invention
- An object of the present invention is to provide a high-strength hot-dip galvanized steel sheet having a TS of 1200 MPa or more, E1 of 13% or more, and a hole expansion ratio of 50% or more, and a method for producing the same.
- the present inventors have conducted extensive studies on a high-strength hot-dip galvanized steel sheet having a TS of 1200 MPa or more, an E1 of 13% or more, and a hole expansion ratio of 50% or more, and found the following.
- the area ratio determined from the structure observation was 0-10% of ferrite, 0-10% martensite, 60-95% tempered martensite, and X-ray rotation method. It is effective to make a miku mouth structure containing 5 to 20% retained austenite at the calculated ratio.
- the present invention has been made on the basis of such knowledge, and in mass 3 ⁇ 4, C: 0.05 to 0.5%, Si: 0.0 1 to 2.5%, ⁇ : 0 ⁇ 5 to 3.5%, ⁇ : 0 ⁇ 003 to 0.100 %, S: 0.02% or less, ⁇ 1: 0 ⁇ 010 to 0.5%, the balance is composed of Fe and inevitable impurities, and the area ratio obtained from the structure observation is 0 to 10 ° / .
- ferrite 0 to 10% martensite, 60 to 95% tempered martensite, and 5 to 20 ° / at a rate determined by X-ray diffraction method.
- a high strength hot-dip galvanized steel sheet having a miku mouth structure containing the remaining austenite.
- the high strength hot dip galvanized steel sheet of the present invention further includes mass. /. And Cr: 0.005-2.00 ° /. , Mo:. 0 005 ⁇ 2.00 0/ 0, V: 0.005 ⁇ 2.00 0/0, Ni: 0.005 ⁇ 2 ⁇ 00%, Cu: 0.005 ⁇ 2.00% from the least to be selected.
- one element is contained. Furthermore, by mass%, at least one element selected from Ti: 0.01 to 0.20%, Nb: 0.01 to 0 ⁇ 20%, ⁇ : 0 ⁇ 0002 to 0.005%, Ca: 0.001 to 0 ⁇ 0 05% , REM: 0.001 to 0.005 ° /. More preferably, it contains at least one element selected from the group consisting of:
- the zinc galvanizing can be an alloyed zinc galvanizing.
- High-strength hot-dip zinc plated steel sheet of the present invention for example, a slab having the above component composition, hot rolling, subjected to cold rolling and cold-rolled steel sheet, the cold-rolled steel sheet, (Ac 3 transformation point - the temperature range of 50 ° C) ⁇ Ac 3-varying state point was heated at an average heating rate of less than 2 ° C / s, after soaking and holding 10s more than Ac 3 transformation point or more temperature range, 20 ° C / Cooling to a temperature range of (Ms point-100 ° C) to (Ms point-200 ° C) with an average cooling rate of s or more, and maintaining the temperature range of 300 to 600 ° C for l to 600s and reheating It can be manufactured by a method in which hot dip galvanizing is performed after annealing.
- the zinc plating can be alloyed after the molten zinc plating.
- the present invention it has become possible to produce a high-strength hot-dip galvanized steel sheet having excellent workability with TS of 1200 MPa or more, E1 of 13% or more, and a hole expansion ratio of 50% or more.
- TS 1200 MPa or more
- E1 13% or more
- hole expansion ratio 50% or more.
- C is an element necessary to raise TS by generating a second phase such as martensite and tempered martensite. If the C content is less than 0.05%, the area ratio of tempered martensite is 60% or less.
- the amount of C is from 0 ⁇ 05 to 0.5%, preferably from 0.1 to 0.3 ° /.
- Si is an effective element for solid solution strengthening to improve TS-E1 balance and to generate retained austenite.
- the Si content must be 0.01% or more.
- the Si content is 0.01 to 2.5 ° /. , Preferably 0.7 to 2.0 ° /.
- ⁇ is an element that is effective for strengthening steel and promotes the formation of second phase such as martensite.
- the amount of ⁇ ⁇ needs to be 0.5% or more.
- the amount of ⁇ is set to 0.5 to 3.5%, preferably 1.5 to 3.0%.
- ⁇ is an element effective for strengthening steel. To achieve such advantages, it is necessary to in the ⁇ amount 0.00 to 3% or more. On the other hand, if the amount of iron exceeds 0.100%, grain boundary segregation causes the steel to become brittle and deteriorates the impact resistance. Therefore, the dredging amount should be 0.003 to 0.100%.
- S 0.02 ° /. Less than Since S exists as an inclusion such as MnS and deteriorates the impact resistance and weldability, the amount is preferably reduced as much as possible. However, the amount of sulfur should be 0.02% or less from the viewpoint of manufacturing cost.
- A1 is an element effective in generating ferrite and improving TS-E1 balance. In order to obtain these effects, the A1 amount needs to be 0.010% or more. On the other hand, if the amount of A1 exceeds 0.5%, the risk of slab cracking during continuous forging increases. Therefore, the amount of A1 is 0.010 to 0.5%.
- the balance is Fe and inevitable impurities, but Cr: 0.005 to 2.00%,: 0 ⁇ : 0 ⁇ 00 5 to 2.00 ° V: 0.005 to 2.00 for the following reasons. /. , Ni: 0.005-2.00%, Cu: 0.005-2.00 ° Ti: 0.01-0-20%, Nb: 0.01-0-20%, ⁇ : 0.0002-0.005%, Ca: 0.001-0.005%, REM: 0.001 ⁇ 0.005 ° /. It is preferable that at least one kind of is contained.
- Cr, ⁇ , V, Ni, Cu are effective elements for the formation of second phase such as martensite.
- the content of at least one element selected from Cr, Mo, V, Ni and Cu is 0.005 ° /. It is necessary to.
- each content of Cr, Mo, V, Ni, Cu is 2.00 ° /. Exceeding this will saturate the effect and increase costs. Therefore, the Cr, Mo, V, Ni, and Cu contents are 0.005 to 2.00 ° // respectively.
- Ti and Nb are elements that form carbonitrides and are effective in increasing the strength of steel by precipitation strength.
- the content of at least one element selected from Ti and N3 ⁇ 4 needs to be 0.01% or more.
- the content of Ti and N exceeds 0.20%, the effect of increasing the strength is saturated and E1 decreases. Therefore, the Ti and Nb contents should be 0.01 to 0.20%, respectively.
- B is an effective element for the formation of the second phase by suppressing the formation of ferrite from the austenite grain boundaries.
- the B content must be 0.0002% or more.
- B amount If it exceeds 0.005%, the effect will be saturated and the cost will increase. Therefore, the amount of B is set to 0.0 002 to 0.005%.
- Ca and REM are both effective elements for improving processability by controlling the morphology of sulfides.
- the content of at least one element selected from Ca and REM needs to be 0.001% or more.
- the contents of Ca and REM are each 0.001 to 0.005 ° /.
- Hue-light area ratio 0 ⁇ 0 ° / 0
- the area ratio of ferrite is 10 ° /. Exceeding this makes it difficult to achieve a TS of 1200 MPa or more and a hole expansion ratio of 50% or more. Therefore, the area ratio of ferrite is 0-10%.
- the area ratio of martensite exceeds 10%, the decrease in the hole expansion ratio becomes remarkable. Therefore, the area ratio of martensite is 0-10 ° /.
- Tempered martensite area ratio 60-95%
- the area ratio of tempered martensite is less than 60%, it is difficult to achieve both TS of 1200MPa or more and a hole expansion ratio of 50% or more. On the other hand, when the area ratio exceeds 95%, the decrease in E1 becomes significant. Therefore, the area ratio of tempered martensite is 60-95%.
- Residual austenite is effective in improving E1.
- the ratio of retained austenite needs to be 5% or more.
- the proportion of retained austenite is 5-20%.
- pearlite and bainite may be included as phases other than ferrite, martensite, tempered martensite, and retained austenite, but the object of the present invention can be achieved as long as the above microstructure condition is satisfied.
- the area ratio of ferrite, martensite, and tempered martensite is the ratio of the area of each phase to the observation area.
- the area ratio of ferrite, martensite, and tempered martensite is the thickness cross section of the steel sheet. After being polished, it was corroded with 3% nital, and the position of the plate thickness 1/4 was observed with a scanning electron microscope (SEM) at a magnification of 1500 times and obtained using commercially available surface image processing software.
- SEM scanning electron microscope
- the ratio of residual austenite was determined by using Mo ⁇ ⁇ -rays with an X-ray diffractometer on the surface that was further polished to 0.1 mm by chemical polishing after the steel plate was polished to a thickness of 1/4. fee Integral strength of iron (200), (220), (311) plane and bcc iron (200), (211), ( 220 ) plane was measured, and the ratio of retained austenite was calculated from these. .
- High-strength hot-dip zinc plated steel sheet of the present invention for example, a slab having the above component composition, hot rolling, subjected to cold rolling and cold-rolled steel sheet, the cold-rolled steel sheet, (Ac 3 transformation point - the temperature range of 50 ° C) ⁇ Ac 3-varying state point was heated at an average heating rate of less than 2 ° C / s, after soaking and holding 10s more than Ac 3 transformation point or more temperature range, 20 ° C / Cooling to a temperature range of (Ms point-100 ° C) to (Ms point-2003 ⁇ 4) at an average cooling rate of s or more, annealing at a temperature range of 300 to 600 ° C and holding for 1 to 600s and reheating Can be produced by a method of applying hot-dip zinc plating.
- Heating conditions during annealing (Ac 3 transformation point - 50 ° C) ⁇ Ac 3 heating temperature range of the transformation point below the average heating rate of 2 ° C / s
- Soaking conditions during annealing Soaking so as to maintain 10s or more in the temperature range above the Ac 3 transformation point
- the soaking temperature is less than the Ac 3 transformation point or the holding time is less than 10 s, austenite is not sufficiently generated, and the microstructure of the present invention cannot be obtained. Therefore, it is necessary to maintain the temperature for 10 s or more in the temperature range above the Ac 3 transformation point.
- the upper limit of the soaking temperature and the upper limit of the holding time are not specified, but it is effective even if soaking is performed at a temperature range of 950 ° C or higher or a holding time of 600s or longer. Since it becomes saturated and leads to cost, it is preferable that the soaking temperature is less than 950 ° C and the holding time is less than 600 s.
- Cooling conditions during annealing Cool the temperature range from the soaking temperature (Ms point-100 ° C) to (Ms point-200 ° C) at an average cooling rate of 20 ° C / s or higher.
- the average cooling rate in the temperature range from the soaking temperature (Ms point-100 ° C) to (Ms point-200 ° C) is less than 20 ° C / s, a large amount of ferrite is generated during cooling, and the present invention The microstructure cannot be obtained. Therefore, it is necessary to cool at an average cooling rate of 20 ° C / s or more.
- the upper limit of the average cooling rate is not specified in particular, but the shape of the steel plate deteriorates, and it becomes difficult to control the temperature at which the cooling reaches, that is, (Ms point-100 ° C) to (Ms point-200 ° C). 200 ° C / s or less is preferable.
- the ultimate cooling temperature is one of the most important conditions for obtaining the microstructure of the present invention. Cooling When cooled to the ultimate temperature, part of austenite transforms into martensite, and during subsequent reheating and squeezing treatment, martensite becomes tempered martensite and untransformed austenite remains in austenite or martensite. Become an Init. At this time, if the temperature reached by cooling exceeds (Ms point-100 ° C), the martensitic transformation becomes insufficient, and if it is less than (Ms point-200.C), the untransformed austenite is remarkably reduced. The Mikuguchi organization is not obtained. Therefore, the ultimate cooling temperature must be in the temperature range of (Ms point-100 ° C) to (Ms point _200 ° C).
- the Ms point is the temperature at which the martensitic transformation of austenite begins, and can be obtained from the change in the coefficient of linear expansion of the steel during cooling.
- Reheating conditions during annealing Reheating with holding for l ⁇ 600s in the temperature range of 300 ⁇ 600 ° C
- the martensite produced during cooling is tempered to become tempered martensite, and C to untransformed austenite Concentration progresses and stabilizes as retained austenite, or part of it transforms into martensite. If the reheating temperature is less than 300 ° C, tempering of martensite and stabilization as retained austenite are insufficient, and if it exceeds 600 ° C, untransformed austenite tends to undergo pearlite transformation. Yarn and weave cannot be obtained. Therefore, the reheating temperature is in the temperature range of 300 to 600 ° C.
- the holding time is 1 to 600 s.
- the conditions for other production methods are not particularly limited, but the following conditions are preferable.
- the slab is preferably produced by a continuous forging method in order to prevent macro segregation, but can also be produced by an ingot-making method or a thin slab forging method.
- the slab In order to hot-roll the slab, the slab may be cooled to room temperature and then reheated for hot rolling, or the slab may be charged into a heating furnace without being cooled to room temperature. Hot rolling can also be performed. Alternatively, an energy saving process in which hot rolling is performed immediately after performing a slight heat retention can be applied.
- it is preferable to heat to 1100 ° C or higher in order to dissolve carbides and prevent an increase in rolling load. In order to prevent the increase of scale loss, the heating temperature of the slabs 1 3 00. It is good to make it below C.
- the rough bar after rough rolling can be heated from the viewpoint of preventing troubles during rolling even if the heating temperature of the slab is lowered.
- a so-called continuous rolling process in which rough bars are joined together and finish rolling is continuously performed can be applied.
- Finish rolling is preferably performed at a finishing temperature equal to or higher than the Ar 3 transformation point because it may increase the anisotropy and lower the workability after cold rolling / annealing.
- the steel sheet after hot rolling is preferably milled at a milling temperature of 450 to 700 ° C. from the viewpoint of temperature control and prevention of decarburization.
- the steel plate after the shave is preferably cold-rolled at a reduction rate of 40% or more, annealed under the above conditions, and hot-dip galvanized.
- the hot-rolled sheet annealing can be applied to the steel sheet after cutting.
- Hot-dip zinc plating contains 0.12 to 0.22% of A1 if zinc alloy is not alloyed, or A1 content of 0.08 to 0.18 when alloying zinc alloy. Including 440-500 ° C hot water bath After dipping the steel plate, adjust the adhesion amount by gas wiping. In the case of alloying zinc plating, the alloying treatment is then performed by holding at 450 to 600 ° C for 1 to 30 seconds.
- the steel sheet after hot dip galvanizing, or the steel sheet after galvanizing alloying treatment can be subjected to temper rolling for the purposes of shape correction and surface roughness adjustment.
- Various paint treatments such as resin and oil coating can also be applied. Example
- a deposit with an adhesion amount of 35 to 45 g / m 2 was formed, alloyed at 520 ° C., and cooled at a cooling rate of 10 ° C./second to produce plated steel sheets 1 to 30. As shown in Tables 2 and 3, some plated steel sheets were not alloyed. And about the obtained plated steel plate, the area ratio of ferrite, martensite, and tempered martensite and the ratio of retained austenite were measured by the above method. In addition, a JIS No. 5 tensile test piece was taken in a direction perpendicular to the rolling direction, and a tensile test was performed in accordance with JIS Z 2241. In addition, specimens of 150 mm x 150 mm were collected and subjected to a hole expansion test three times in accordance with JFST 1001 (iron standard) to determine the average hole expansion rate (%), and the stretch flangeability was evaluated.
- JFST 1001 iron standard
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2010008622A MX339088B (es) | 2008-02-08 | 2009-01-28 | Lamina de acero galvanizada por inmersion en caliente, de alta tenacidad, con excelente procesabilidad y procedimiento para la produccion de la misma. |
US12/866,469 US9011614B2 (en) | 2008-02-08 | 2009-01-28 | High-strength galvanized steel sheet with excellent formability and method for manufacturing the same |
EP09709141.7A EP2267176B1 (en) | 2008-02-08 | 2009-01-28 | High-strength hot-dip galvanized steel sheet with excellent processability and process for producing the same |
CN2009801043730A CN101939456A (zh) | 2008-02-08 | 2009-01-28 | 加工性优良的高强度热镀锌钢板及其制造方法 |
CA2712514A CA2712514C (en) | 2008-02-08 | 2009-01-28 | High strength galvanized steel sheet with excellent formability and method for manufacturing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2008-028376 | 2008-02-08 | ||
JP2008028376 | 2008-02-08 |
Publications (1)
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WO2009099079A1 true WO2009099079A1 (ja) | 2009-08-13 |
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PCT/JP2009/051824 WO2009099079A1 (ja) | 2008-02-08 | 2009-01-28 | 加工性に優れた高強度溶融亜鉛めっき鋼板およびその製造方法 |
Country Status (9)
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US (1) | US9011614B2 (ja) |
EP (1) | EP2267176B1 (ja) |
JP (1) | JP5402007B2 (ja) |
KR (1) | KR101218448B1 (ja) |
CN (1) | CN101939456A (ja) |
CA (1) | CA2712514C (ja) |
MX (1) | MX339088B (ja) |
TW (1) | TWI464296B (ja) |
WO (1) | WO2009099079A1 (ja) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102884218A (zh) * | 2010-03-09 | 2013-01-16 | 杰富意钢铁株式会社 | 高强度钢板及其制造方法 |
EP2546368A1 (en) * | 2010-03-09 | 2013-01-16 | JFE Steel Corporation | Method for producing high-strength steel sheet |
WO2013038637A1 (ja) * | 2011-09-16 | 2013-03-21 | Jfeスチール株式会社 | 加工性に優れた高強度鋼板およびその製造方法 |
EP2546375B1 (en) | 2010-03-09 | 2015-09-30 | JFE Steel Corporation | High-strength pressed member and method for producing same |
WO2016158159A1 (ja) * | 2015-03-31 | 2016-10-06 | 株式会社神戸製鋼所 | 加工性および衝突特性に優れた引張強度が980MPa以上の高強度冷延鋼板、およびその製造方法 |
JP2016194138A (ja) * | 2015-03-31 | 2016-11-17 | 株式会社神戸製鋼所 | 加工性および衝突特性に優れた引張強度が980MPa以上の高強度冷延鋼板、およびその製造方法 |
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WO2016158159A1 (ja) * | 2015-03-31 | 2016-10-06 | 株式会社神戸製鋼所 | 加工性および衝突特性に優れた引張強度が980MPa以上の高強度冷延鋼板、およびその製造方法 |
WO2020017609A1 (ja) * | 2018-07-18 | 2020-01-23 | 日本製鉄株式会社 | 鋼板 |
JPWO2020017609A1 (ja) * | 2018-07-18 | 2020-07-27 | 日本製鉄株式会社 | 鋼板 |
WO2020128574A1 (en) | 2018-12-18 | 2020-06-25 | Arcelormittal | Cold rolled and heat-treated steel sheet and method of manufacturing the same |
WO2020128811A1 (en) | 2018-12-18 | 2020-06-25 | Arcelormittal | Cold rolled and heat-treated steel sheet and method of manufacturing the same |
JP2022540208A (ja) * | 2019-07-29 | 2022-09-14 | ポスコ | 高強度鋼板及びこの製造方法 |
JP2022540210A (ja) * | 2019-07-29 | 2022-09-14 | ポスコ | 高強度鋼板及びこの製造方法 |
JP7440605B2 (ja) | 2019-07-29 | 2024-02-28 | ポスコ カンパニー リミテッド | 高強度鋼板及びこの製造方法 |
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CA2712514A1 (en) | 2009-08-13 |
TWI464296B (zh) | 2014-12-11 |
KR101218448B1 (ko) | 2013-01-04 |
TW200940745A (en) | 2009-10-01 |
CN101939456A (zh) | 2011-01-05 |
EP2267176A1 (en) | 2010-12-29 |
MX339088B (es) | 2016-05-11 |
US20110198002A1 (en) | 2011-08-18 |
EP2267176B1 (en) | 2015-08-12 |
KR20100099757A (ko) | 2010-09-13 |
MX2010008622A (es) | 2010-10-25 |
EP2267176A4 (en) | 2013-12-25 |
JP5402007B2 (ja) | 2014-01-29 |
CA2712514C (en) | 2015-11-24 |
JP2009209450A (ja) | 2009-09-17 |
US9011614B2 (en) | 2015-04-21 |
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