WO2008018531A1 - Tôle d'acier pour emboutissage et procédé de fabrication de celle-ci - Google Patents
Tôle d'acier pour emboutissage et procédé de fabrication de celle-ci Download PDFInfo
- Publication number
- WO2008018531A1 WO2008018531A1 PCT/JP2007/065590 JP2007065590W WO2008018531A1 WO 2008018531 A1 WO2008018531 A1 WO 2008018531A1 JP 2007065590 W JP2007065590 W JP 2007065590W WO 2008018531 A1 WO2008018531 A1 WO 2008018531A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- less
- steel
- aging treatment
- steel sheet
- rolling
- Prior art date
Links
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
- C22C38/04—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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0236—Cold rolling
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
Definitions
- the present invention relates to DR (Double Open for EOE), which can easily open a part of a can lid used for a wide range of uses such as beverage cans, general food cans and the like.
- DR Double Open for EOE
- Reduced 0 or less abbreviated as DR
- This application is based on Japanese Patent Application No. 2006-219066 and is incorporated herein by reference. Background
- Can lids having an easy open function are widely used as can lids for metal cans.
- This kind of can lid is roughly classified into a partial open type can lid mainly used for beverage cans and a full open type can lid mainly used for food cans.
- an easy-open can lid is widely used in which the opening formed in the panel of the can lid is broken and opened by pulling up a tab fixed by a rivet mechanism.
- the body of the easy open can lid is formed with a lever having no easy open function, and the lid is formed with no rivet, rivets and an opening guide groove.
- the opening guide groove is formed by using a processing tool having a blade-like projection having a predetermined opening contour and a depth of 1/2 or more of the lid plate thickness from the surface side of the can lid. This is done by pressing with high load / load so that the opening guide groove is formed.
- the rivet is formed by a combination of overhanging and drawing.
- a rivet mechanism is formed by inserting the formed rivet into a hole provided in the tab and performing caulking.
- Patent Document 3 which makes it easy to make the lid and improve the openability, utilizes B oxide. It is said that the opening of the can is facilitated by having a void origin in the steel sheet, and that the rivet formability is not degraded by limiting the B oxide size. However, since impurities such as oxides present in the steel are the starting points of fracture due to processing, they may not lead to an essential solution. Although such proposals have been made, in reality, thin hard materials have not been able to withstand practical use because cracks occur in the riveting process.
- Patent Document 1 Japanese Patent Laid-Open No. 63-109121
- Patent Document 2 Japanese Patent Application Laid-Open No. 64-015326
- Patent Document 3 Japanese Patent Laid-Open No. 10-251799
- Patent Document 4 FR9004264
- the present invention has been made in view of the above circumstances, and is a DR steel sheet excellent in rivet workability capable of processing EOE with production equipment in a conventional two-stage rivet forming process, and manufactured at low cost. It is an object to provide a manufacturing method for this purpose.
- the DR steel sheet of the present invention has mass% as its steel component, C: 0.02% to 0.06%, Si: 0.03% or less, Mn: 0.05% to 0.5%, P: 0.02% or less, S: 0.02% A1: 0.0 2% to 0.10%, N: 0.008% to 0.015%, the remaining iron and unavoidable impurity power in steel sheet N (Ntotal—NasAIN) is 0.006% or more, aging The total elongation value in the rolling direction after the treatment is 10% or more, the total elongation value in the sheet width direction after the aging process is 5% or more, and the average Rankford value after the aging treatment is 1.0 or less.
- the amount of solute N is preferably 0.008% or more, and more preferably 0.009% or more.
- the manufacturing method of the DR steel sheet of the present invention is mass% as a steel component, C: 0.02% to 0.06%, Si: 0.03% or less, Mn: 0.05% to 0.5%, P: 0.02% or less, S: 0.02% or less, A1: 0.02% to 0.10%, N: 0.008% to 0.015%, and the amount of solute N (Ntotal—NasAIN) in the steel plate consisting of the remaining iron and unavoidable impurities is 0.006% or more.
- the steel slab is heated to 1200 ° C or higher and hot-rolled at a finishing temperature not lower than the Ar3 transformation point; After the pickling, cold rolling with a rolling rate of 80% or more is performed; annealing at a recrystallization temperature or more and less than an Acl transformation point; and temper rolling with a rolling rate of 6% to 15%.
- the conventional thin continuous annealing DR steel sheet requires a rivet forming process of three or more stages
- the DR steel sheet of the present invention is devised in terms of the composition and manufacturing method of the steel sheet and further subjected to an aging treatment.
- an aging treatment By defining the elongation in the subsequent rolling and width directions and the Rankford value after aging treatment, it is possible to form rivets in two stages.
- FIG. 1 is a cross-sectional view after the first stage of rivet molding.
- FIG. 2 is a cross-sectional view after the second stage of rivet molding.
- FIG. 3 is a cross-sectional view after rivet caulking, where symbol t indicates a tab and symbol d indicates a rivet diameter.
- FIG. 4 is a graph showing the relationship between solute N and the Rankford value.
- the present invention limits the steel components, secures all elongation values in the rolling direction and the sheet width direction after aging treatment, and reduces the average rankford value after aging treatment, and its inexpensive DR steel plate. Related to a manufacturing method.
- FIG. 1 shows the cross-sectional view after the first stage overhang molding
- Figure 2 shows the cross-sectional view after the rivet molding by the second stage drawing
- the rivet obtained by caulking with the tab after rivet molding
- Figure 3 shows a cross-sectional view of the mechanism.
- the rivet molding requires characteristics for following processing.
- the inventors have found that if the total elongation value in the rolling direction after the aging treatment is 10% or more and the total elongation value in the sheet width direction after the aging treatment is 5% or more, the rivet molding can be easily followed. To I got it.
- the reason for following rivet molding is not clear despite the fact that the total elongation value in the sheet width direction is small compared to the rolling direction.
- the reason for this is that the rivet molding includes drawing and the effect of the Rankford value is considered. That is, it is known that a steel sheet having an average Rankford value of 1.0 or less as in the present invention has a higher rank ford value in the sheet width direction than in the rolling direction. Therefore, in the processing in the plate width direction, the total elongation and the rank fore value may act in a complementary manner and have the same ductility as the rolling direction.
- the first step is stretched or the second step is drawn. Material breakage occurs during molding.
- the rivet diameter is important in caulking with a tab. If the rivet diameter is small, there will be a problem that the tab will come off.
- the inventors of the present invention compared the properties of the steel sheet with the tabs caulked and the steel sheet with the tabs removed, and as a result, they found that the average Rankford values after aging treatment were different from each other. If the average Rankford value exceeds 1.0, the rivet diameter will decrease, but if it is less than 1.0, the rivet diameter will increase and the tab will not come off.
- the aging treatment can be performed at 180 to 220 (200 to 210) degrees 7 to 30 minutes, and the conditions for the aging treatment in the evaluation test were 210 degrees C and 30 minutes.
- C is one of the factors governing crystal grain growth, and the amount added is small! / Grain coarsening and grain growth during annealing are promoted, and the average rankford value (r value) of the steel sheet increases. Therefore, to make the r value less than 1.0, the lower limit of the C content must be 0.02%.
- the larger the amount of C the finer the crystal grains and the more cementite precipitates in the steel. These fine grains and cementite precipitates are the starting points for void formation in the tensile test, and facilitate the propagation of cracks and reduce the total elongation of the product plate. Therefore, the upper limit of the C content is set to 0.6%.
- Mn is a useful element that fixes S and prevents red heat brittleness during hot rolling. In order to exert this effect, it is essential to add more than double S, so if S is less than 0.02%, the lower limit of Mn must be 0.05%. On the other hand, in steel sheets with a large amount of Mn in the steel, the crystal grains are likely to become finer and harder and lower in total elongation. In addition, the heat treatment causes Mn concentration on the surface layer of the steel sheet and the corrosion resistance deteriorates, so the upper limit of Mn is set to 0.5%.
- P Like Mn, P also works to harden the steel sheet, lower the total elongation, and deteriorate the corrosion resistance. In particular, if the P content exceeds 0.02%, segregation at the grain boundaries becomes prominent and the steel sheet becomes brittle, making it difficult to obtain the required total elongation. Therefore, the upper limit is set to 0.02%.
- S exists as an inclusion and is a harmful element that causes a decrease in total elongation and deterioration of corrosion resistance.
- it is an element that is inevitably mixed at the time of fertility, and if it is a small amount, there is no practical problem.
- A1 is an element necessary as a deoxidizer during melting, and is a preferred element that increases the cleanliness of steel sheets! Therefore, the amount added must be sufficient to exclude oxygen in the steel.
- the lower limit is set to 0.02%.
- excess A1 after deoxidation combines with N in the steel to form A1N precipitates, reducing the total elongation value and generating surface defects caused by alumina clusters, etc. The upper limit.
- N is the most important production factor, and acts as a solute N on the steel sheet to exert the effect of the present invention.
- N is a solid solution strengthening element superior to P, and has the advantage of not deteriorating corrosion resistance like P. In addition, it has an effect of lowering the average rankford value of the product plate by acting on the aggregate structure important for the present invention.
- the content exceeds 0.015%, the steel sheet becomes extremely brittle, the total elongation is lost, and slab cracking during continuous forging and nest defects due to gas generation tend to occur. Therefore, the power to set the N upper limit to 0.015%
- the upper limit is preferably 0.010%.
- the composition of the DR steel sheet for EOE of the present invention in mass% is C: 0.02% to 0.06%, Si: 0.03% or less, Mn: 0.05% to 0.5%, P: 0.02% or less, S: 0.02% or less, A1: Force required to contain 0.02% to 0 ⁇ 10%, ⁇ : 0.008% to 0.015%
- the steel slab used as a rolling raw material is not limited, In order to minimize macro segregation of a component, what is obtained by a continuous forging method is preferable.
- This continuous forged steel slab does not necessarily need to be cooled before hot rolling, and it is desirable that the continuous forged steel slab be directly sent to hot rolling after forging and inserted into a heating furnace. This is, This is to avoid a situation in which the solid solution N that can be used is reduced by cooling the billet.
- the detailed mechanism is not clear, it has been found that when the slab is cooled and reheated, the lower the temperature, the lower the solute N. Therefore, when reheating a cold piece, it is close to the situation at the time of forging! / In the present invention where it is desirable to apply a heating temperature at the upper limit of the process capability! /, At least 1200 ° C or more It is necessary to reheat at the heating temperature.
- the hot rolling finish rolling is performed with the steel slab temperature maintained at or above the Ar3 transformation point.
- a uniform and fine hot-rolled structure can be obtained by rolling above the transformation point, and by suppressing strain-induced precipitation of A1N, it becomes easy to secure a stable and large amount of solute N in the hot-rolling stage.
- the hot-rolled steel sheet obtained in this way is descaled by pickling and further cold-rolled. If the cold rolling rate is less than 80%, continuous annealing! / Is marked! /, Grain growth may occur and the average rank Ford value may exceed 1.0. Accordingly, the cold rolling reduction ratio is more preferably 85% to 95%, which is preferably 80% or higher.
- the recrystallization treatment after cold rolling is performed in an annealing furnace.
- the annealing temperature exceeds the Acl transformation point, significant grain growth occurs and the average rank ford value of the product plate exceeds 1.0, so the upper limit of the annealing temperature is set to 700 ° C.
- the lower limit is made the recrystallization temperature or more.
- Secondary cold rolling after annealing is an important production factor of the present invention after solute N.
- a rolling reduction ratio of 6% to 15% is applied to the continuously annealed steel sheet of the present invention containing solute N in an amount of 0.006% or more.
- the anisotropy of the elongation of the steel sheet that is, the elongation of 10% or more in the rolling direction and 5% or more in the sheet width direction can be secured.
- the detailed mechanism is not clear, if the solid solution N in the steel is 0.006% or more, there is a possibility that it acts on the density and movement of dislocations generated by rolling to suppress cell formation.
- the lower limit is 6%, and rolling below this level increases the total elongation, but loses the stable rolling property and makes it impossible to secure the flatness of the steel plate necessary for coating and continuous lid formation.
- the rolling reduction exceeds 15%, the anisotropy of the elongation of the steel sheet increases and the dislocation cellization progresses, and the total elongation in the sheet width direction becomes less than 5%.
- the steel plate that has undergone the above-described process is defined as the final product. Although the thickness of the final product is not particularly defined, the total elongation value increases as the plate thickness is increased. Therefore, the upper limit is preferably set to 0.20 mm in consideration of the can cost after canning.
- the plate thickness is less than 0.14 mm, problems tend to occur in the processability and strength of the lid, so it is preferable to set the practical lower limit to 0.14 mm.
- the surface treatment of the steel plate is not limited as long as it can be applied to a normal steel plate for cans. That is, tin plating, chromium plating, nickel plating, and a combination of them. Further, the present invention can be applied to a pre-coated steel sheet that can be made by painting or sticking an organic resin film on the steel sheet.
- Table 1 shows the components, characteristics of the steel sheet and rivet workability
- Table 2 shows the manufacturing conditions, steel sheet characteristics and rivet workability.
- the manufacturing conditions of the present invention examples of steel materials shown in Table 1 are as follows: Steel slab heating temperature 1211 ° C ⁇ ; 124 8 ° C, Hot rolling finishing temperature 851 ° C ⁇ 896 ° C, Cutting temperature 546 ° C ⁇ 599 ° C, cold rolling ratio 88.2% ⁇ 92.6%, continuous annealing temperature 642 ° C ⁇ 686 ° C, temper rolling ratio 6% ⁇ ; 15%, product thickness is 0.160mm ⁇ 0.200mm.
- the steel materials of the inventive examples shown in Table 2 were manufactured using the same steel pieces as those of the inventive example 2 described in Table 1.
- the Ar3 transformation point of Invention Example 2 is 834 ° C.
- Comparative Examples 23 to 28 are SR (Single Reduce; hereinafter abbreviated as SR) materials, and other Comparative Examples and Examples are DR steel plates having a product sheet thickness of 0.168 mm to 0.200 mm.
- These steel sheets are subjected to electrolytic chromic acid treatment or chemical conversion treatment after Sn plating as surface treatment, followed by coating and baking (190 °) of dry film thickness ⁇ ⁇ in order of the outer surface equivalent surface and inner surface equivalent surface, respectively. C for 10 minutes).
- the DR steel sheets of the present invention are devised in terms of the composition and manufacturing method of the steel sheets, and further rolled after aging treatment.
- the direction and width direction elongation and the Rankford value after aging treatment rivet molding in two stages is possible.
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- Heat Treatment Of Sheet Steel (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US12/227,505 US20090250147A1 (en) | 2006-08-11 | 2007-08-09 | Dr Steel Sheet and Manufacturing Method Thereof |
JP2008528868A JP5047970B2 (ja) | 2006-08-11 | 2007-08-09 | Eoe用dr鋼板およびその製造方法 |
EP07792242A EP2050834A4 (en) | 2006-08-11 | 2007-08-09 | DR STEEL PLATE AND MANUFACTURING METHOD THEREFOR |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006219066 | 2006-08-11 | ||
JP2006-219066 | 2006-08-11 |
Publications (1)
Publication Number | Publication Date |
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WO2008018531A1 true WO2008018531A1 (fr) | 2008-02-14 |
Family
ID=39033060
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/065590 WO2008018531A1 (fr) | 2006-08-11 | 2007-08-09 | Tôle d'acier pour emboutissage et procédé de fabrication de celle-ci |
Country Status (7)
Country | Link |
---|---|
US (1) | US20090250147A1 (ja) |
EP (1) | EP2050834A4 (ja) |
JP (1) | JP5047970B2 (ja) |
KR (1) | KR20090007796A (ja) |
CN (1) | CN101454470A (ja) |
TW (1) | TW200827460A (ja) |
WO (1) | WO2008018531A1 (ja) |
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EP2253729A1 (en) * | 2008-03-19 | 2010-11-24 | JFE Steel Corporation | High-strength metal sheet for use in cans, and manufacturing method therefor |
JP2012072439A (ja) * | 2010-09-29 | 2012-04-12 | Jfe Steel Corp | 高強度高加工性缶用鋼板およびその製造方法 |
WO2012077628A1 (ja) * | 2010-12-06 | 2012-06-14 | 新日本製鐵株式会社 | エアゾール缶底蓋用鋼板及びその製造方法 |
WO2013008457A1 (ja) * | 2011-07-12 | 2013-01-17 | Jfeスチール株式会社 | 缶用鋼板およびその製造方法 |
JP2013072129A (ja) * | 2011-09-29 | 2013-04-22 | Jfe Steel Corp | 高強度高加工性缶用鋼板およびその製造方法 |
JP2013119655A (ja) * | 2011-12-08 | 2013-06-17 | Jfe Steel Corp | 高強度高加工性缶用鋼板およびその製造方法 |
CN103205657A (zh) * | 2008-04-03 | 2013-07-17 | 杰富意钢铁株式会社 | 高强度罐用钢板及其制造方法 |
WO2013151085A1 (ja) | 2012-04-06 | 2013-10-10 | Jfeスチール株式会社 | 高強度高加工性鋼板及びその製造方法 |
KR20160096211A (ko) | 2014-04-30 | 2016-08-12 | 제이에프이 스틸 가부시키가이샤 | 고강도 강판 및 그 제조 방법 |
KR20160146904A (ko) | 2014-04-30 | 2016-12-21 | 제이에프이 스틸 가부시키가이샤 | 고강도 용기용 강판 및 그 제조 방법 |
JP2017155267A (ja) * | 2016-02-29 | 2017-09-07 | Jfeスチール株式会社 | 缶用鋼板およびその製造方法 |
JP2018034165A (ja) * | 2016-08-29 | 2018-03-08 | 株式会社神戸製鋼所 | 異材接合用アークスポット溶接法、接合補助部材、及び、異材溶接継手 |
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JP2021091966A (ja) * | 2019-12-04 | 2021-06-17 | Jfeスチール株式会社 | 高強度缶用鋼板およびその製造方法 |
US11519059B2 (en) | 2016-06-23 | 2022-12-06 | Baoshan Iron & Steel Co., Ltd. | High-strength high-elongation tinned primary plate and double cold reduction method therefor |
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KR101645840B1 (ko) * | 2012-06-06 | 2016-08-04 | 제이에프이 스틸 가부시키가이샤 | 3 피스 캔체 및 그 제조 방법 |
CN109423577B (zh) * | 2017-08-30 | 2021-01-12 | 宝山钢铁股份有限公司 | 一种高强多相钢镀锡原板及其制造方法 |
WO2021009966A1 (ja) * | 2019-07-18 | 2021-01-21 | Jfeスチール株式会社 | 箱型焼鈍dr鋼板およびその製造方法 |
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2007
- 2007-08-07 TW TW096128989A patent/TW200827460A/zh unknown
- 2007-08-09 WO PCT/JP2007/065590 patent/WO2008018531A1/ja active Application Filing
- 2007-08-09 JP JP2008528868A patent/JP5047970B2/ja active Active
- 2007-08-09 KR KR1020087030194A patent/KR20090007796A/ko not_active Application Discontinuation
- 2007-08-09 CN CNA2007800198222A patent/CN101454470A/zh active Pending
- 2007-08-09 US US12/227,505 patent/US20090250147A1/en not_active Abandoned
- 2007-08-09 EP EP07792242A patent/EP2050834A4/en not_active Withdrawn
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JP2017155267A (ja) * | 2016-02-29 | 2017-09-07 | Jfeスチール株式会社 | 缶用鋼板およびその製造方法 |
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JP2021507991A (ja) * | 2017-12-22 | 2021-02-25 | ポスコPosco | 鋼板表面処理用溶液組成物及びそれを用いて表面処理された鋼板 |
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Also Published As
Publication number | Publication date |
---|---|
TW200827460A (en) | 2008-07-01 |
US20090250147A1 (en) | 2009-10-08 |
EP2050834A1 (en) | 2009-04-22 |
EP2050834A4 (en) | 2010-09-29 |
CN101454470A (zh) | 2009-06-10 |
JPWO2008018531A1 (ja) | 2010-01-07 |
JP5047970B2 (ja) | 2012-10-10 |
KR20090007796A (ko) | 2009-01-20 |
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