TWI564403B - Steel sheet for can and method for manufacturing the same - Google Patents
Steel sheet for can and method for manufacturing the same Download PDFInfo
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- TWI564403B TWI564403B TW101125056A TW101125056A TWI564403B TW I564403 B TWI564403 B TW I564403B TW 101125056 A TW101125056 A TW 101125056A TW 101125056 A TW101125056 A TW 101125056A TW I564403 B TWI564403 B TW I564403B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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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
- 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
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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
- 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
- C21D8/0442—Flattening; Dressing; Flexing
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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
- 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
- C21D8/0468—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 between cold rolling steps
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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
- 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
- C21D8/0473—Final recrystallisation annealing
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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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
- 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
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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
- C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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Description
本發明係關於當作飲料品與食品的容器材料使用之罐用鋼板及其製造方法，詳言之，係關於凸緣加工性優異、具高強度的罐用鋼板及其製造方法。 The present invention relates to a steel sheet for cans used as a container material for beverages and foods, and a method for producing the same, and more particularly to a steel sheet for cans which is excellent in flange workability and has high strength and a method for producing the same.
飲料罐與食品罐所使用的鋼板中，蓋、底、三片罐的罐身、抽拉罐等，有使用通稱DR(Double Reduced，雙相軋壓)材之鋼板的情況。所謂「DR材」係在退火後再度施行冷軋的鋼板，相較於僅執行軋縮率小之調質軋延的SR(Single Reduced，單相軋壓)材，較容易將板厚減薄。而藉由使用薄鋼板，可降低製罐成本。 Among the steel sheets used for beverage cans and food cans, there are cases where a steel sheet of a cover, a bottom, a three-piece can, a drawing can, or the like is used, which is generally referred to as a DR (Double Reduced) material. The "DR material" is a steel sheet that is cold-rolled after annealing, and it is easier to reduce the thickness of the sheet than the SR (Single Reduced) material that performs only the rolling reduction of the rolling reduction. . By using thin steel sheets, the cost of making can be reduced.
製造DR材的DR法係藉由退火後再度施行冷軋而產生加工硬化，因而可製造薄且硬的鋼板。但是，另一方面因為利用DR法所製造的DR材缺乏延性，因而相較於SR材之下，加工性差。 The DR method for producing a DR material is subjected to cold rolling by annealing and then subjected to work hardening, whereby a thin and hard steel sheet can be produced. On the other hand, however, since the DR material produced by the DR method lacks ductility, the workability is inferior to that of the SR material.
由三片構成之食品罐、飲料罐的罐身材料，在成形為筒狀之後，為能繞緊著蓋與底，係對二端施行凸緣加工。所以，對罐身端部要求良好的加工性(凸緣加工性)。 The can body material of the food can and the beverage can made up of three pieces is formed into a cylindrical shape, and the flanges are processed at both ends of the cover so that the cover and the bottom can be wound. Therefore, good workability (flange workability) is required for the end of the can body.
再者，當作製罐素材用的鋼板需要能因應板厚的強度(拉伸強度)，在DR材的情況，為能確保因變薄而造成的經濟效益，需要SR材以上的拉伸強度。 In addition, the steel sheet used as the material for the can is required to have a strength (tensile strength) depending on the thickness of the sheet, and in the case of the DR material, the tensile strength of the SR material or more is required in order to ensure economic benefits due to thinning.
但是，習知所使用的DR材頗難兼顧如上述的凸緣加工性與拉伸強度，所以食品罐、飲料罐的罐身材料向來主要使用SR材。但是，目前為了從降低成本的觀點而減薄板厚，對食品罐、飲料罐的罐身材料，亦要求DR材的擴大適用。 However, the DR material used in the prior art is difficult to achieve both the flange workability and the tensile strength as described above. Therefore, the material of the can body of the food can and the beverage can is mainly used as the SR material. However, at present, in order to reduce the thickness of the sheet from the viewpoint of cost reduction, it is also required to expand the DR material for the can body material of the food can and the beverage can.
因應上述要求，專利文獻1所揭示之凸緣加工性優異的鋼板係含有C：0.04~0.08%，將軋延方向的總伸長值設為X、且平均蘭弗得值(Lankford value)依Y表示時，滿足X≧10%且Y≧0.9、或X<10%且Y≧-0.05X+1.4的關係。 In response to the above-mentioned requirements, the steel sheet excellent in flange workability disclosed in Patent Document 1 contains C: 0.04 to 0.08%, the total elongation value in the rolling direction is X, and the average Lankford value is Y. When expressed, the relationship of X ≧ 10% and Y ≧ 0.9, or X < 10% and Y ≧ - 0.05X + 1.4 is satisfied.
專利文獻2所揭示之凸緣成形性優異的鋼板，係含有C：超過0.04%且0.08%以下，且鋼板中所固溶的C與N之間，滿足50ppm≦固溶C+固溶N≦200ppm，且固溶C為50ppm以下、固溶N為50ppm以上。 The steel sheet excellent in flange formability disclosed in Patent Document 2 contains C: more than 0.04% and 0.08% or less, and C and N which are solid-dissolved in the steel sheet satisfy 50 ppm of bismuth solution C + solid solution N ≦ 200 ppm. And the solid solution C is 50 ppm or less, and the solid solution N is 50 ppm or more.
專利文獻3所揭示之凸緣成形性優異的鋼板，係含有N：0.01%以下，且鋼板中所固溶的C與N的合計係40ppm≦固溶C+固溶N≦150ppm之範圍。 The steel sheet excellent in flange formability disclosed in Patent Document 3 contains N: 0.01% or less, and the total of C and N dissolved in the steel sheet is in the range of 40 ppm of solid solution C + solid solution N ≦ 150 ppm.
專利文獻4所揭示的頸縮成形性及凸緣成形性均優異的鋼板，係含有N：0.012%以下，且鋼板中所固溶的C與N間，具有50ppm≦固溶C+固溶N的關係。 The steel sheet excellent in both the neck formability and the flange formability disclosed in Patent Document 4 contains N: 0.012% or less, and C and N which are solid-dissolved in the steel sheet have 50 ppm of solid solution C + solid solution N. relationship.
專利文獻1：日本專利特開2007-177315號公報 Patent Document 1: Japanese Patent Laid-Open Publication No. 2007-177315
專利文獻2：日本專利特開2002-294399號公報 Patent Document 2: Japanese Patent Laid-Open Publication No. 2002-294399
專利文獻3：日本專利特開平10-110244號公報 Patent Document 3: Japanese Patent Laid-Open No. Hei 10-110244
專利文獻4：日本專利特開平10-110238號公報 Patent Document 4: Japanese Patent Laid-Open No. Hei 10-110238
然而，上述習知技術均潛在有問題。 However, the above prior art techniques are potentially problematic.
專利文獻1及專利文獻2所記載的鋼，因為C量過多，因而凸緣加工時會發生局部性窄縮情形，導致無法充分抑制凸緣龜裂。 In the steels described in Patent Document 1 and Patent Document 2, since the amount of C is too large, local shrinkage occurs during flange processing, and flange cracking cannot be sufficiently suppressed.
專利文獻3及專利文獻4所記載的鋼，因為N量過少，因而雖加工性良好，但即便施行二次冷軋，強度仍不足。 In the steels described in Patent Document 3 and Patent Document 4, since the amount of N is too small, the workability is good, but even if secondary cold rolling is performed, the strength is insufficient.
本發明係有鑑於此種實情而完成，目的在於提供頗適用為三片罐身等的材料之凸緣加工性優異且具高強度的罐用鋼板及其製造方法。 The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a steel sheet for a can which is excellent in flange workability and has high strength, which is suitable for a material such as a three-piece can body, and a method for producing the same.
本發明者等以兼顧凸緣加工性與拉伸強度為目的，經深入鑽研的結果，獲得以下發現。 The inventors of the present invention have obtained the following findings for the purpose of achieving both flange workability and tensile strength.
為能兼顧凸緣加工性與拉伸強度，藉由抑低C的含量俾防止熔接部過度硬化，並增加塑性應變比(以下稱「r值」)，對抑制凸緣加工時的板厚減少情形係屬有效。又，藉由添加大量的N，可確保強度，同時藉由細微析出的AlN，可防止熔接熱影響部(HAZ)的軟化。 In order to achieve both flange workability and tensile strength, it is possible to prevent the weld portion from being excessively hardened by lowering the content of C, and to increase the plastic strain ratio (hereinafter referred to as "r value"), thereby reducing the thickness of the flange during the flange processing. The situation is valid. Further, by adding a large amount of N, the strength can be ensured, and at the same time, the softening of the heat-affected zone (HAZ) can be prevented by the finely deposited AlN.
本發明為達成上述目的，提供下述內容。 In order to achieve the above object, the present invention provides the following.
(1)一種罐用鋼板，係鋼板的成分組成依質量%計含有：C：0.001%以上且未滿0.040%、Si：0.003%以上且0.100%以下、Mn：0.10%以上且0.60%以下、P：0.001%以上且0.100%以下、S：0.001%以上且0.020%以下、Al：0.005%以上且0.100%以下、N：超過0.0130%且0.0170%以下，其餘部分係Fe及不可避免的雜質；N total-(N as AlN)係0.0100%以上且0.0160%以下，此處，「N total」係N的總量，「N as AlN」係以AlN形式存在的N量，平均r值係超過1.0。 (1) A steel sheet for a can, wherein the component composition of the steel sheet contains, by mass%: C: 0.001% or more and less than 0.040%, Si: 0.003% or more and 0.100% or less, and Mn: 0.10% or more and 0.60% or less. P: 0.001% or more and 0.100% or less, S: 0.001% or more and 0.020% or less, Al: 0.005% or more and 0.100% or less, N: more than 0.0130% and 0.0170% or less, and the balance being Fe and unavoidable impurities; N total-(N as AlN) is 0.0100% or more and 0.0160% or less. Here, "N total" is the total amount of N, and "N as AlN" is the amount of N in the form of AlN, and the average r value is more than 1.0. .
(2)如(1)所記載的罐用鋼板，其中，上述C含量係0.020%以上且0.039%以下。 (2) The steel sheet for cans according to the above aspect, wherein the C content is 0.020% or more and 0.039% or less.
(3)如(1)所記載的罐用鋼板，其中，上述C含量係0.025%以上且0.035%以下。 (3) The steel sheet for cans according to the above aspect, wherein the C content is 0.025% or more and 0.035% or less.
(4)如(1)所記載的罐用鋼板，其中，上述N含量係0.0140%以上且0.0160%以下。 (4) The steel sheet for cans according to (1), wherein the N content is 0.0140% or more and 0.0160% or less.
(5)如(1)所記載的罐用鋼板，其中，上述N total-(N as AlN)含量係0.0110%以上且0.0130%以下。 (5) The steel sheet for cans according to the above aspect, wherein the N total-(N as AlN) content is 0.0110% or more and 0.0130% or less.
(6)如(1)所記載的罐用鋼板，其中，上述鋼板的成分組成 進一步依質量%計含有從：Cr：0.10%以下、Cu：0.20%以下、Ni：0.15%以下、Mo：0.05%以下、Ti：0.3%以下、Nb：0.3%以下、Zr：0.3%以下、V：0.3%以下、Ca：0.01%以下所構成群組中選擇的至少1種元素。 (6) The steel sheet for cans according to (1), wherein the composition of the steel sheet is Further, the content includes: Cr: 0.10% or less, Cu: 0.20% or less, Ni: 0.15% or less, Mo: 0.05% or less, Ti: 0.3% or less, Nb: 0.3% or less, and Zr: 0.3% or less. V: at least one element selected from the group consisting of 0.3% or less and Ca: 0.01% or less.
(7)如(1)所記載的罐用鋼板，其中，上述罐用鋼板係軋延直角方向的拉伸強度為520MPa以上之罐用鋼板。 (7) The steel sheet for cans according to the above aspect, wherein the steel sheet for a can is a steel sheet for cans having a tensile strength of 520 MPa or more in a right angle direction.
(8)如(1)所記載的罐用鋼板，其中，上述罐用鋼板係軋延直角方向的拉伸強度為530MPa以上之罐用鋼板。 (8) The steel sheet for cans according to the above aspect, wherein the steel sheet for a can has a steel sheet for cans having a tensile strength of 530 MPa or more in a right angle direction.
(9)如(1)所記載的罐用鋼板，其中，上述罐用鋼板係斷裂伸長率為7%以上的罐用鋼板。 (9) The steel sheet for cans according to the above aspect, wherein the steel sheet for a can is a steel sheet for a can having a breaking elongation of 7% or more.
(10)一種罐用鋼板之製造方法，係包括有：準備依質量%計含有：C：0.001%以上且未滿0.040%、Si：0.003%以上且0.100%以下、Mn：0.10%以上且0.60%以下、P：0.001%以上且0.100%以下、 S：0.001%以上且0.020%以下、Al：0.005%以上且0.100%以下、N：超過0.0130%且0.0170%以下，其餘部分係Fe及不可避免雜質的鋼；將該鋼利用連續鑄造而形成鋼胚；對該鋼胚施行熱軋；依500℃以上且未滿630℃的溫度捲取該熱軋板；依91.5%以上的軋縮率對該熱軋板施行一次冷軋；對該一次冷軋板施行退火；及依20%以下的軋縮率對該經該退火過的一次冷軋板施行二次冷軋。 (10) A method for producing a steel sheet for a can, comprising: C: 0.001% or more and less than 0.040%, Si: 0.003% or more and 0.100% or less, and Mn: 0.10% or more and 0.60 in terms of % by mass % or less, P: 0.001% or more and 0.100% or less, S: 0.001% or more and 0.020% or less, Al: 0.005% or more and 0.100% or less, N: more than 0.0130% and 0.0170% or less, and the balance being Fe and inevitable impurities; the steel is continuously cast to form steel Embedding; hot rolling the steel preform; winding the hot rolled sheet at a temperature of 500 ° C or more and less than 630 ° C; performing cold rolling on the hot rolled sheet at a rolling reduction ratio of 91.5% or more; The rolled sheet is subjected to annealing; and the annealed primary cold rolled sheet is subjected to secondary cold rolling at a rolling reduction ratio of 20% or less.
(11)如(10)所記載的罐用鋼板之製造方法，其中，在上述熱軋前，將上述鋼胚再加熱至1200℃以上且1300℃以下。 (11) The method for producing a steel sheet for a can according to the above aspect, wherein the steel preform is further heated to 1200 ° C or more and 1300 ° C or less before the hot rolling.
(12)如(10)所記載的罐用鋼板之製造方法，其中，上述熱軋係在1100℃以上的溫度開始。 (12) The method for producing a steel sheet for a can according to the above aspect, wherein the hot rolling is started at a temperature of 1100 ° C or higher.
(13)如(10)所記載的罐用鋼板之製造方法，其中，上述熱軋係在Ar3變態點以上的溫度結束。 (13) The method for producing a steel sheet for a can according to the above aspect, wherein the hot rolling is completed at a temperature equal to or higher than the Ar3 transformation point.
(14)如(10)所記載的罐用鋼板之製造方法，其中，在上述一次冷軋之前施行酸洗。 (14) The method for producing a steel sheet for a can according to (10), wherein the pickling is performed before the primary cold rolling.
(15)如(10)所記載的罐用鋼板之製造方法，其中，上述一次冷軋的軋縮率係91.5%以上且95%以下。 (15) The method for producing a steel sheet for a can according to the above aspect, wherein the primary cold rolling has a rolling reduction ratio of 91.5% or more and 95% or less.
(16)如(10)所記載的罐用鋼板之製造方法，其中，上述一 次冷軋後的退火係再結晶溫度以上且800℃以下的退火。 (16) The method for producing a steel sheet for a can according to (10), wherein the one The annealing after the secondary cold rolling is annealing at a recrystallization temperature of not less than 800 ° C.
(17)如(10)所記載的罐用鋼板之製造方法，其中，上述二次冷軋的軋縮率係10%以上且15%以下。 (17) The method for producing a steel sheet for a can according to the above aspect, wherein the secondary cold rolling has a rolling reduction ratio of 10% or more and 15% or less.
(18)如(10)所記載的罐用鋼板之製造方法，其中，經上述二次冷軋後，對二次冷軋板施行電鍍處理。 (18) The method for producing a steel sheet for a can according to (10), wherein the secondary cold-rolled sheet is subjected to a plating treatment after the secondary cold rolling.
另外，本說明書中，表示鋼成分的「%」全部均係指「質量%」。又，所謂「高強度罐用鋼板」係指軋延直角方向的拉伸強度在520MPa以上之罐用鋼板。 In addition, in this specification, it means that "%" of a steel component means "mass %." In addition, the "steel plate for high-strength cans" refers to a steel plate for cans having a tensile strength of 520 MPa or more in the direction perpendicular to the rolling.
根據本發明，可獲得軋延直角方向的拉伸強度在520MPa以上、且斷裂伸長率在7%以上之凸緣加工性優異的高強度罐用鋼板。 According to the present invention, it is possible to obtain a steel sheet for a high-strength can having excellent tensile workability in which the tensile strength in the direction perpendicular to the transverse direction is 520 MPa or more and the elongation at break is 7% or more.
藉由提升鋼板的凸緣加工性，當施行三片罐的凸緣加工時不會發生龜裂，可利用板厚較薄的DR材進行製罐，能達成罐用鋼板的大幅薄壁化。 By improving the flange workability of the steel sheet, cracking does not occur when the flange of the three-piece can is processed, and the DR material having a small thickness can be used for canning, and the steel sheet for the can can be greatly reduced in thickness.
針對表示本發明重要要件的實驗結果，說明如下。 The experimental results indicating the important requirements of the present invention are explained below.
平均r值越大，則對鋼板施加拉伸變形時的板厚減少越少。因為凸緣加工時的罐身端部係成為被施加罐周方向拉伸變形的狀態，因而平均r值越大，越抑制板厚減少，可防止龜裂發生。 The larger the average r value, the less the thickness reduction when the steel sheet is subjected to tensile deformation. Since the end portion of the can body during the flange processing is in a state of being stretch-deformed by the circumferential direction of the can, the average r value is larger, and the reduction in the thickness of the can is suppressed, and cracking can be prevented.
所以，本發明者等便使用含有各種C量的鋼，且藉由調 整製造條件而製作具有各種平均r值的鋼板(DR材)，調查C量與平均r值對凸緣加工性造成的影響。另外，因為本發明係屬於DR材，因而頗難依照JIS Z 2254所規定的拉伸試驗進行r值測定。所以，使用JIS Z 2254的附錄JA所記載之固有振動法來測定平均r值。又，凸緣加工性係施行190g飲料罐尺寸的罐身成形，並依有無發生凸緣龜裂進行評價。 Therefore, the inventors used steels containing various amounts of C, and by adjusting Steel sheets (DR materials) having various average r values were produced under the entire manufacturing conditions, and the influence of the C amount and the average r value on the flange workability was examined. Further, since the present invention belongs to the DR material, it is difficult to measure the r value in accordance with the tensile test prescribed in JIS Z 2254. Therefore, the average r value is measured using the natural vibration method described in Appendix JA of JIS Z 2254. Further, the flange workability was performed by molding a can body having a size of 190 g of the beverage can, and evaluated whether or not the flange crack occurred.
圖1所示係C量、平均r值、凸緣加工性及軋延直角方向強度的關係。當凸緣加工部沒有龜裂、拉伸強度達530MPa以上的情況評為「○」，當凸緣加工部沒有龜裂、拉伸強度為520MPa以上且未滿530MPa的情況評為「●」，當凸緣加工部有發生較小龜裂(長度未滿1mm)的情況評為「△」，當有發生較大龜裂(長度達1mm以上)的情況評為「×」。 Fig. 1 shows the relationship between the amount of C, the average r value, the flange workability, and the strength in the direction perpendicular to the rolling. When the flanged portion has no crack and the tensile strength is 530 MPa or more, it is evaluated as "○", and when the flanged portion is not cracked, and the tensile strength is 520 MPa or more and less than 530 MPa, it is rated as "●". When the flanged portion has a small crack (length less than 1 mm), it is evaluated as "△", and when a large crack occurs (length is 1 mm or more), it is evaluated as "X".
上述實驗結果中，即便C量未滿0.040%，平均r值在1.0以下的鋼板仍會出現凸緣龜裂。所以，得知在防止凸緣龜裂時，必須C量未滿0.040%且平均r值為超過1.0。 In the above experimental results, even if the amount of C is less than 0.040%, the steel sheet having an average r value of 1.0 or less may still have a flange crack. Therefore, it is known that when the flange crack is prevented, the amount of C must be less than 0.040% and the average r value exceeds 1.0.
以下，針對本發明進行詳細說明。 Hereinafter, the present invention will be described in detail.
本發明的罐用鋼板係軋延直角方向的拉伸強度為520MPa以上、斷裂伸長率為7%以上、且平均r值超過1.0的凸緣加工性優異之高強度罐用鋼板。而此種鋼板係對抑低C含量、含有大量N的鋼，藉由將二次冷軋率設為適當範圍而製造。具體而言係施行熱軋，依未滿630℃的溫度捲取，接著，依91.5%以上的軋縮率施行一次冷軋，接著施行退火， 接著依20%以下的軋縮率施行二次冷軋便可製造。該等係本發明最重要的要件。 The steel sheet for cans of the present invention is a steel sheet for high-strength cans which has a tensile strength of 520 MPa or more, a breaking elongation of 7% or more, and an average r value of more than 1.0, which is excellent in flange workability. On the other hand, such a steel sheet is produced by suppressing the C content and the steel containing a large amount of N by setting the secondary cold rolling ratio to an appropriate range. Specifically, hot rolling is performed, and coiling is performed at a temperature of less than 630 ° C. Then, cold rolling is performed at a rolling reduction ratio of 91.5% or more, followed by annealing. Then, it can be manufactured by performing secondary cold rolling at a rolling reduction ratio of 20% or less. These are the most important requirements of the present invention.
針對本發明罐用鋼板的成分組成進行說明。 The component composition of the steel sheet for cans of the present invention will be described.
若C量為0.040%以上，因為罐身熔接部的硬化會變為過大，因而在凸緣加工時會導致熔接部附近的應力集中，而造成凸緣龜裂。另一方面，若C量未滿0.001%，則無法獲得確保強度所必要的固溶C量，導致強度不足。當C量為0.001%以上且未滿0.040%時，可確保520MPa以上的強度，且罐身熔接部不會過度硬化，凸緣加工性呈良好，所以C量最好係0.001%以上且未滿0.040%。又，從獲得530MPa以上之更高強度的觀點而言，C量更佳係0.020%以上且0.039%以下。為能獲得更高強度，C量更佳係0.025%以上且0.035%以下。 When the amount of C is 0.040% or more, since the hardening of the can weld portion becomes excessively large, stress concentration in the vicinity of the welded portion is caused during the flange processing, and the flange is cracked. On the other hand, when the amount of C is less than 0.001%, the amount of solid solution C necessary for securing the strength cannot be obtained, resulting in insufficient strength. When the amount of C is 0.001% or more and less than 0.040%, the strength of 520 MPa or more can be secured, and the can weld portion is not excessively hardened, and the flange workability is good. Therefore, the amount of C is preferably 0.001% or more and less than 0.040%. Further, from the viewpoint of obtaining a higher strength of 530 MPa or more, the amount of C is more preferably 0.020% or more and 0.039% or less. In order to obtain higher strength, the amount of C is more preferably 0.025% or more and 0.035% or less.
若Si量超過0.100%，因為會引發表面處理性降低、耐蝕性劣化等問題，所以Si量最好在0.100%以下。又，若為0.003%以上，則不需要過多的精煉成本便可獲得必要的表面處理性、耐蝕性，所以Si量最好為0.003%以上。 When the amount of Si exceeds 0.100%, since the surface treatment property is lowered and the corrosion resistance is deteriorated, the amount of Si is preferably 0.100% or less. In addition, when it is 0.003% or more, the necessary surface treatment property and corrosion resistance are obtained without requiring too much refining cost, so the amount of Si is preferably 0.003% or more.
Mn係具有將結晶粒予以細微化的作用，屬於用以確保較佳材質的必要元素。若Mn量為0.10%以上，可獲得上述結 晶粒細微化效果。另一方面，當Mn量在0.60%以下時，耐蝕性及r值均可獲得良好特性。所以，Mn量較佳係0.10%以上且0.60%以下。 Mn has a function of refining crystal grains and is an essential element for securing a preferable material. If the amount of Mn is 0.10% or more, the above junction can be obtained. Grain grain refinement effect. On the other hand, when the amount of Mn is 0.60% or less, good corrosion resistance and r value can be obtained. Therefore, the amount of Mn is preferably 0.10% or more and 0.60% or less.
P係屬於會使鋼硬質化，致使加工性惡化，同時亦會使耐蝕性惡化的有害元素。因為設為0.100%以下時，加工性、耐蝕性均可呈良好，所以P量最好在0.100%以下。另一方面，使P未滿0.001%較耗費脫P成本，但若在0.001%以上便可在不致耗費過多脫P成本的情況下獲得上述加工性、耐蝕性，所以P量最好設為0.001%以上。 P is a harmful element that hardens the steel, deteriorates the workability, and deteriorates the corrosion resistance. When the content is 0.100% or less, both workability and corrosion resistance are good, so the amount of P is preferably 0.100% or less. On the other hand, if P is less than 0.001%, it is more expensive than P, but if it is 0.001% or more, the above processability and corrosion resistance can be obtained without excessive cost of P removal, so the amount of P is preferably set to 0.001. %the above.
S係在鋼中依夾雜物形式存在，屬於會導致延性降低、耐蝕性劣化的有害元素。若S量在0.020%以下，則鋼中夾雜物量可充分降低，可防止延性降低、耐蝕性劣化，所以S量最好在0.020%以下。另一方面，使S未滿0.001%較耗費脫S成本，但若在0.001%以上便可在不致耗費過多脫S成本的情況下確保上述的延性、耐蝕性。所以，S量最好設為0.001%以上且0.020%以下。 The S system exists in the form of inclusions in steel and is a harmful element that causes a decrease in ductility and deterioration in corrosion resistance. When the amount of S is 0.020% or less, the amount of inclusions in the steel can be sufficiently lowered, and the ductility can be prevented from being lowered and the corrosion resistance is deteriorated. Therefore, the amount of S is preferably 0.020% or less. On the other hand, if S is less than 0.001%, it is more expensive than the cost of S, but if it is 0.001% or more, the above-mentioned ductility and corrosion resistance can be ensured without excessive cost. Therefore, the amount of S is preferably set to 0.001% or more and 0.020% or less.
Al係製鋼時當作脫氧材用的必要元素。Al含量為0.005%以上時，可充分脫氧，使夾雜物減少，能獲得良好加工性。另一方面，若Al含量在0.100%以下，可抑制因氧化鋁叢集 (alumina cluster)等所造成的表面缺陷生成。所以，Al量較佳係0.005%以上且0.100%以下。 Al-based steel is an essential element for deoxidizing materials. When the Al content is 0.005% or more, the oxygen can be sufficiently deoxidized to reduce the inclusions, and good workability can be obtained. On the other hand, if the Al content is 0.100% or less, the alumina cluster can be suppressed. Surface defects caused by (alumina cluster) and the like. Therefore, the amount of Al is preferably 0.005% or more and 0.100% or less.
本發明的鋼板係藉由含有大量的N而確保強度。N超過0.0130%時可獲得後述的N total-(N as AlN)之充分量，俾確保必要強度。另一方面，若N超過0.0170%，延性雖會降低，但若在0.0170%以下便可獲得充分的延性，可發揮良好的凸緣加工性。所以，N量最好係為超過0.0130%且0.0170%以下。為能獲得更良好的強度與凸緣加工性，更佳係0.0140%以上且0.0160%以下。 The steel sheet of the present invention ensures strength by containing a large amount of N. When N exceeds 0.0130%, a sufficient amount of N total-(N as AlN) described later can be obtained, and the necessary strength is ensured. On the other hand, when N exceeds 0.0170%, the ductility is lowered, but if it is 0.0170% or less, sufficient ductility can be obtained, and good flange workability can be exhibited. Therefore, the amount of N is preferably more than 0.0130% and less than 0.0170%. In order to obtain more excellent strength and flange workability, it is more preferably 0.0140% or more and 0.0160% or less.
對強度具貢獻的N主要係固溶狀態的N，本發明的鋼板中，為確保強度，需要某程度的固溶N量。本發明的鋼板組成中，在鋼中由N所形成的化合物可認為主要係AlN，可將從N總量(N total)扣減掉以AlN形式所存在之N量(N as AlN)的值N total-(N as AlN)，視為「固溶N量」。最好充分確保該量，若在0.0100%以上，便可獲得所要求的強度。另一方面，在上述N量範圍(超過0.0130%且0.0170%以下)下，若增加N total-(N as AlN)量，則AlN量會變少。鋼中所析出的AlN具有抑制熔接熱影響部(HAZ)的結晶粒成長並防止軟化的作用。若N total-(N as AlN)量超過0.0160%，無法獲得防止HAZ軟化之足夠量的AlN量，若在0.0160%以下， 便可確保必要AlN量，可防止HAZ軟化。所以，N total-(N as AlN)量最好係0.0100%以上且0.0160%以下。又，從強度及防止HAZ軟化的觀點而言，N total-(N as AlN)量更佳係0.0110%以上且0.0130%以下。 N which contributes to the strength is mainly N in a solid solution state, and in the steel sheet of the present invention, a certain amount of solid solution N is required in order to secure strength. In the steel sheet composition of the present invention, a compound formed of N in steel can be considered to be mainly AlN, and the value of N (N as AlN) in the form of AlN can be deducted from the total amount of N (N total). N total-(N as AlN) is regarded as "solid solution N amount". It is preferable to sufficiently ensure the amount, and if it is 0.0100% or more, the required strength can be obtained. On the other hand, in the above N amount range (more than 0.0130% and 0.0170% or less), when the amount of N total - (N as AlN) is increased, the amount of AlN is decreased. The AlN precipitated in the steel has an effect of suppressing the growth of crystal grains of the heat affected zone (HAZ) and preventing softening. If the amount of N total-(N as AlN) exceeds 0.0160%, a sufficient amount of AlN to prevent HAZ softening cannot be obtained, and if it is 0.0160% or less, It ensures the necessary amount of AlN and prevents HAZ from softening. Therefore, the amount of N total-(N as AlN) is preferably 0.0100% or more and 0.0160% or less. Further, from the viewpoint of strength and prevention of HAZ softening, the amount of N total-(N as AlN) is more preferably 0.0110% or more and 0.0130% or less.
其餘部分係含有Fe及不可避免的雜質。 The rest contains Fe and unavoidable impurities.
再者，在熔接罐用鋼板中亦可含有一般所含有的成分元素。例如配合目的亦可含有Cr：0.10%以下、Cu：0.20%以下、Ni：0.15%以下、Mo：0.05%以下、Ti：0.3%以下、Nb：0.3%以下、Zr：0.3%以下、V：0.3%以下、Ca：0.01%以下等成分元素。 Further, the steel sheet for a welded can may contain a component element which is generally contained. For example, it may contain Cr: 0.10% or less, Cu: 0.20% or less, Ni: 0.15% or less, Mo: 0.05% or less, Ti: 0.3% or less, Nb: 0.3% or less, and Zr: 0.3% or less, V: Component elements such as 0.3% or less and Ca: 0.01% or less.
其次，針對本發明罐用鋼板的平均塑性應變比(平均r值)進行說明。 Next, the average plastic strain ratio (average r value) of the steel sheet for cans of the present invention will be described.
如前述，因為平均r值越大，則越能抑制凸緣加工時的板厚減少，因而可防止凸緣龜裂產生，為此，將平均r值設為超過1.0便可。所以，平均r值最好係超過1.0。 As described above, the larger the average r value, the more the thickness reduction during the flange processing can be suppressed, and the occurrence of cracking of the flange can be prevented. Therefore, the average r value can be made more than 1.0. Therefore, the average r value is preferably more than 1.0.
另外，上述平均r值係藉由將C及Mn的含量限定於前述範圍內便可進行控制。又，平均r值係可依照JIS Z 2254的附錄JA所示方法進行測定，並進行評價。軋延直角方向的拉伸強度為520MPa以上、斷裂伸長率為7%以上 Further, the above average r value can be controlled by limiting the contents of C and Mn to the above range. Further, the average r value can be measured and evaluated in accordance with the method shown in Appendix JA of JIS Z 2254. The tensile strength in the right angle direction is 520 MPa or more, and the elongation at break is 7% or more.
拉伸強度係用以確保蓋的耐壓強度、罐的突刺強度、及罐體強度所必需的。近年來，飲料罐的成形方法有逐漸增加採 取沿軋延方向施行熔接的方法，此情況，以罐體強度而言，所需要者係軋延直角方向的強度。所以，拉伸強度較佳係軋延直角方向的拉伸強度為520MPa以上。又，為能更安定地確保蓋的耐壓強度、罐的突刺強度及罐體強度，軋延直角方向的拉伸強度更佳係530MPa以上。 Tensile strength is necessary to ensure the pressure resistance of the cap, the spur strength of the can, and the strength of the can. In recent years, the forming method of beverage cans has gradually increased. The method of welding in the rolling direction is taken. In this case, in terms of the strength of the can body, the strength required in the direction of the right angle is rolled. Therefore, the tensile strength is preferably such that the tensile strength in the direction perpendicular to the rolling direction is 520 MPa or more. Further, in order to more securely ensure the pressure resistance of the cap, the burr strength of the can, and the strength of the can body, the tensile strength in the direction perpendicular to the rolling direction is preferably 530 MPa or more.
再者，若斷裂伸長率為7%以上，便不易發生凸緣龜裂，可輕易地獲得良好凸緣加工性，因而最好斷裂伸長率在7%以上。 Further, when the elongation at break is 7% or more, flange cracking is less likely to occur, and good flange workability can be easily obtained, so that the elongation at break is preferably 7% or more.
另外，拉伸強度及斷裂伸長率係可依照「JIS Z 2241」所示的金屬材料拉伸試驗方法進行測定。 Further, the tensile strength and the elongation at break can be measured in accordance with the tensile test method for metallic materials shown in "JIS Z 2241".
其次，針對本發明的罐用鋼板之製造方法進行說明。 Next, a method of producing the steel sheet for a can according to the present invention will be described.
本發明的罐用鋼板係將由上述組成構成的鋼利用連續鑄造形成鋼胚，經施行熱軋後，再依未滿630℃的溫度施行捲取，依91.5%以上的軋縮率施行一次冷軋，接著施行退火，依20%以下的軋縮率施行二次冷軋便可製造。 In the steel sheet for a can according to the present invention, the steel having the above composition is formed by continuous casting to form a steel preform, and after hot rolling, coiling is performed at a temperature of less than 630 ° C, and cold rolling is performed at a rolling reduction ratio of 91.5% or more. Then, annealing is performed, and secondary cold rolling is performed at a rolling reduction ratio of 20% or less.
可依照使用轉爐等的通常公知熔製方法進行熔製。又，依照連續鑄造法等通常所使用的鑄造方法，形成軋延素材。此時，熱軋前的鋼胚再加熱溫度並無特別的限定，較佳係1200~1300℃。若將鋼胚再加熱溫度設為1200℃以上，便可使最終精軋溫度的確保趨於容易。另一方面，藉由將鋼胚再加熱溫度設為1300℃以下，便可抑制製品表面的缺陷發生、與能源成本過度提高。 The melting can be carried out in accordance with a generally known melting method using a converter or the like. Further, the rolling material is formed in accordance with a casting method generally used such as a continuous casting method. At this time, the reheating temperature of the steel preform before hot rolling is not particularly limited, but is preferably 1200 to 1300 °C. When the steel reheating temperature is 1200 ° C or higher, the final finish rolling temperature can be easily ensured. On the other hand, by setting the reheating temperature of the steel preform to 1300 ° C or lower, it is possible to suppress the occurrence of defects on the surface of the product and to excessively increase the energy cost.
利用熱軋形成熱軋板。在軋延開始時，為能充分減輕軋延荷重，軋延素材較佳係設為1100℃以上。又，熱精軋結束溫度係從防止熱軋鋼板的結晶粒粗大化及析出物分佈均勻性的觀點而言，較佳係Ar3變態點以上。 Hot rolled sheets are formed by hot rolling. At the start of rolling, in order to sufficiently reduce the rolling load, the rolling material is preferably set to 1100 ° C or higher. In addition, from the viewpoint of preventing coarsening of crystal grains and uniformity of distribution of precipitates in the hot-rolled steel sheet, the hot finish rolling finishing temperature is preferably at least the Ar3 transformation point.
捲取溫度未滿630℃時，因為能抑制捲取後所析出的AlN量，可輕易獲得確保強度用之充分量的N total-(N as AlN)量。又，捲取溫度在500℃以上時，軋延速度不會降低，可輕易確保精軋結束溫度，因而較佳。所以，熱軋後的捲取溫度較佳係500℃以上且未滿630℃。 When the coiling temperature is less than 630 ° C, since the amount of AlN precipitated after the coiling can be suppressed, a sufficient amount of N total-(N as AlN) for ensuring the strength can be easily obtained. Further, when the coiling temperature is 500 ° C or more, the rolling speed does not decrease, and the finish rolling temperature can be easily ensured, which is preferable. Therefore, the coiling temperature after hot rolling is preferably 500 ° C or more and less than 630 ° C.
其次，視需要可施行酸洗。酸洗係只要能去除表層銹皮便可，對條件並無特別的規定。 Second, pickling can be performed as needed. As long as the pickling system can remove the surface scale, there is no special regulation on the conditions.
如前述，相較於SR法，DR法較容易將板厚變薄，可製造強度優異的鋼板，因而本發明中係採用DR法。一次冷軋率較小時，為能製造極薄鋼板，必須減薄熱軋的精整厚度、或增加二次冷軋率。若熱軋的精整厚度變薄，便難以確保既定的精整軋延溫度。又，增加二次冷軋率之事，從後述理由而言較不佳。若一次冷軋率為91.5%以上，便不需要減薄熱軋的精整厚度、或增加二次冷軋率，即可製造極薄的鋼板。所以，一次冷軋率較佳係91.5%以上。又，若一次冷軋率在95%以下，便可在不致對冷軋機造成過大負荷情況下施行軋 延，因而一次冷軋率更佳係91.5%以上且95%以下。 As described above, the DR method is easier to thin the sheet thickness than the SR method, and a steel sheet having excellent strength can be produced. Therefore, the DR method is employed in the present invention. When the cold rolling rate is small, in order to manufacture an extremely thin steel sheet, it is necessary to reduce the thickness of the hot rolling or to increase the secondary cold rolling rate. If the finishing thickness of the hot rolling is thin, it is difficult to ensure a predetermined finishing rolling temperature. Further, the increase in the secondary cold rolling rate is less preferable from the reason described later. If the primary cold rolling ratio is 91.5% or more, an extremely thin steel sheet can be produced without thinning the thickness of the hot rolling or increasing the secondary cold rolling ratio. Therefore, the primary cold rolling rate is preferably 91.5% or more. Moreover, if the primary cold rolling rate is below 95%, it can be rolled without causing excessive load on the cold rolling mill. Therefore, the primary cold rolling rate is more preferably 91.5% or more and 95% or less.
一次冷軋後的退火係可利用批次退火或連續退火之任一種方式實施。均熱溫度較佳係再結晶溫度以上且800℃以下。 The annealing after one cold rolling can be carried out by either batch annealing or continuous annealing. The soaking temperature is preferably at least the recrystallization temperature and not higher than 800 °C.
當二次冷軋的軋縮率設為20%以下時，可抑制因二次冷軋造成的加工硬化，可輕易獲得7%以上的斷裂伸長率。所以，二次冷軋率最好設為20%以下。更佳係10%以上且15%以下。 When the rolling reduction ratio of the secondary cold rolling is 20% or less, work hardening due to secondary cold rolling can be suppressed, and elongation at break of 7% or more can be easily obtained. Therefore, the secondary cold rolling ratio is preferably set to 20% or less. More preferably, it is 10% or more and 15% or less.
二次冷軋以後只要依照常法施行電鍍處理等步驟，便可精整為罐用鋼板。 After the secondary cold rolling, it is possible to finish the steel sheet for the can as long as it is subjected to a plating treatment or the like according to a usual method.
利用實機轉爐熔製含有表1所示成分組成、其餘部分由Fe及不可避免雜質所構成的鋼，並利用連續鑄造法獲得鋼胚。將所得鋼胚利用1250℃施行再加熱後，依軋延開始溫度1150℃施行熱軋，軋延至成為表2所示厚度為止，依表2所示捲取溫度進行捲取。熱軋的精整軋延溫度係定為880℃，熱軋後係施行酸洗。接著，依表2所示軋縮率施行一次冷軋，依均熱溫度700℃施行連續退火，接著再依表2所示軋縮率施行二次冷軋。 The steel containing the composition shown in Table 1 and the remainder consisting of Fe and inevitable impurities was melted by a real machine converter, and a steel blank was obtained by a continuous casting method. The obtained steel blank was reheated at 1,250 ° C, and hot rolled at a rolling start temperature of 1,150 ° C, rolled to a thickness shown in Table 2, and wound up at a coiling temperature shown in Table 2. The finishing rolling temperature of hot rolling is set to 880 ° C, and pickling is performed after hot rolling. Next, cold rolling was performed once according to the rolling reduction ratio shown in Table 2, continuous annealing was performed at a soaking temperature of 700 ° C, and then secondary cold rolling was performed according to the rolling reduction ratio shown in Table 2.
對依上述所得鋼板的雙面連續施行鍍錫，形成單面Sn附著量為2.8g/m2的馬口鐵，再精整為罐用鋼板。 Tin plating was continuously applied to both sides of the steel sheet obtained as described above to form a tinplate having a single-side Sn adhesion amount of 2.8 g/m 2 , which was then finished into a steel sheet for a can.
針對以上所得之電鍍鋼板(馬口鐵)，施行相當於210℃、15分鐘烤漆的熱處理後，施行拉伸試驗。拉伸試驗係使用JIS5號尺寸的拉伸試驗片，依照JIS Z 2241，測定軋延直角方向的拉伸強度(斷裂強度)及斷裂伸長率。 The steel plate (tinplate) obtained above was subjected to a heat treatment corresponding to a coating at 210 ° C for 15 minutes, and then subjected to a tensile test. In the tensile test, tensile strength (breaking strength) and elongation at break in the direction perpendicular to the rolling were measured in accordance with JIS Z 2241 using a JIS No. 5 tensile test piece.
平均r值係使用JIS Z 2254的附錄JA所記載之固有振動 法進行測定。 The average r value is the natural vibration described in Appendix JA of JIS Z 2254. The method is measured.
再者，使用經施行相當於烤漆之熱處理過的鋼板，利用縫焊施行外徑52.8mm的罐身成形，將端部頸縮加工至成為外徑50.4mm後，再施行凸緣加工使外徑成為55.4mm，評價有無凸緣龜裂發生。罐身成形係設為190g飲料罐尺寸，沿鋼板軋延方向施行熔接。頸縮加工係利用壓模縮頸(dienecking)方式實施，凸緣加工係利用旋轉凸緣方式實施。在凸緣加工部有發生小龜裂(長度未滿1mm)時評為「△」，發生大龜裂(長度1mm以上)時評為「×」，沒有發生龜裂時評為「○」。 Further, a steel plate having a heat treatment equivalent to a baking varnish was used, and a can body having an outer diameter of 52.8 mm was formed by seam welding, and the end portion was neck-shrinked to have an outer diameter of 50.4 mm, and then subjected to flange processing to have an outer diameter. It was 55.4 mm, and it was evaluated whether or not flange cracking occurred. The can body forming system was set to a 190 g beverage can size and welded in the rolling direction of the steel plate. The necking process is performed by a die necking method, and the flange processing is performed by a rotary flange method. When the crack occurred in the flanged portion (the length was less than 1 mm), it was evaluated as "△", and when the crack occurred (1 mm or more in length), it was evaluated as "X", and when it was not cracked, it was evaluated as "○".
以上所獲得結果如表3所示。 The results obtained above are shown in Table 3.
由表3得知，本發明例(No.1~6)係強度優異，達成作為極薄罐用鋼板所必要的拉伸強度520MPa以上。又，加工性亦優異，具有蓋與三片罐身加工時所必要的7%以上之斷裂伸 長率。 As is clear from Table 3, the examples (No. 1 to 6) of the present invention are excellent in strength, and the tensile strength required for the steel sheet for extremely thin cans is 520 MPa or more. Moreover, it is also excellent in workability, and has a breakage of 7% or more which is necessary for processing the lid and the three-piece can body. Long rate.
另一方面，比較例的No.7與No.8係因為C含量過多，因而罐身熔接部的硬化變為過大，在熔接部附近發生凸緣龜裂。 On the other hand, in No. 7 and No. 8 of the comparative example, since the C content was too large, the hardening of the can body welded portion was excessively large, and flange cracking occurred in the vicinity of the welded portion.
比較例的No.9係因為N含量過少，因而拉伸強度不足。比較例的No.10係因為N含量過多，因二次冷軋而損及延性，且斷裂伸長率不足。 In No. 9 of the comparative example, since the N content was too small, the tensile strength was insufficient. In No. 10 of the comparative example, since the N content was too large, ductility was impaired by secondary cold rolling, and the elongation at break was insufficient.
比較例的No.11係因為捲取溫度過高，因而N total-(N as AlN)量變少，拉伸強度不足。比較例的No.12係因為N total-(N as AlN)量過多，因而AlN量變為過少，HAZ軟化過大，導致發生凸緣龜裂。 In No. 11 of the comparative example, since the coiling temperature was too high, the amount of N total-(N as AlN) was small, and the tensile strength was insufficient. In No. 12 of the comparative example, since the amount of N total-(N as AlN) was too large, the amount of AlN was too small, and the HAZ softening was excessively large, resulting in occurrence of flange cracking.
比較例的No.13與No.14係因為Mn含量過大，因而平均r值過小、發生凸緣龜裂。 In No. 13 and No. 14 of the comparative example, since the Mn content was too large, the average r value was too small, and flange cracking occurred.
由以上結果得知，當C含量未滿0.040%、N含有率為超過0.0130%且0.0170%以下、N total-(N as AlN)量為0.0100%以上且0.0160%以下、Mn含量為0.60%以下，捲取溫度未滿630℃，滿足本發明要件時，可同時具有目標之520MPa以上的軋延直角方向強度及良好的凸緣加工性。 From the above results, the C content is less than 0.040%, the N content is more than 0.0130% and 0.0170% or less, the N total-(N as AlN) amount is 0.0100% or more and 0.0160% or less, and the Mn content is 0.60% or less. When the coiling temperature is less than 630 ° C and the requirements of the present invention are satisfied, the target has a rolling direction of 520 MPa or more and a good flange workability.
本發明可適用為依低成本製造三片罐身等所用的罐用鋼板材料，亦適用作為罐蓋、罐底等的材料。 The present invention can be applied to a steel sheet material for cans used for manufacturing a three-piece can body or the like at a low cost, and is also suitable as a material for a can lid, a can bottom or the like.
圖1係C量與平均r值及凸緣加工性間之關係圖。 Figure 1 is a graph showing the relationship between the amount of C and the average r value and flange workability.
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| JP5803510B2 (en) * | 2011-09-29 | 2015-11-04 | Ｊｆｅスチール株式会社 | High-strength, high-formability steel plate for cans and method for producing the same |
| JP6019719B2 (en) * | 2012-05-02 | 2016-11-02 | Ｊｆｅスチール株式会社 | Manufacturing method of high strength and high ductility steel sheet |
| KR20160027163A (en) * | 2013-07-17 | 2016-03-09 | 제이에프이 스틸 가부시키가이샤 | Steel sheet for can, and method for manufacturing same |
| CN106029926B (en) * | 2014-02-25 | 2018-10-02 | 杰富意钢铁株式会社 | Bottle cap steel plate and its manufacturing method and bottle cap |
| CA2944403C (en) | 2014-04-30 | 2019-02-26 | Jfe Steel Corporation | High-strength steel sheet for containers and method for producing the same |
| MY191191A (en) * | 2014-04-30 | 2022-06-07 | Jfe Steel Corp | High-strength steel sheet and method for manufacturing the same |
| CN105251768B (en) * | 2014-07-16 | 2017-05-24 | 鞍钢股份有限公司 | Method for rolling ultra-thin cold-rolled tinning black plate |
| CN104195453A (en) * | 2014-08-18 | 2014-12-10 | 常熟市新洲机械制造厂 | Smelting process for food processing mechanical material |
| JP5958630B2 (en) * | 2014-10-10 | 2016-08-02 | Ｊｆｅスチール株式会社 | Crown steel plate and manufacturing method thereof |
| WO2016056239A1 (en) * | 2014-10-10 | 2016-04-14 | Ｊｆｅスチール株式会社 | Steel plate for cap and method for producing same |
| JP6164273B2 (en) * | 2015-01-09 | 2017-07-19 | Ｊｆｅスチール株式会社 | Steel plate for cans and method for producing steel plate for cans |
| JP6052474B1 (en) * | 2015-02-26 | 2016-12-27 | Ｊｆｅスチール株式会社 | Crown steel sheet, crown steel sheet manufacturing method and crown |
| JP6210177B2 (en) * | 2015-03-27 | 2017-10-11 | Ｊｆｅスチール株式会社 | Steel plate for can and manufacturing method thereof |
| WO2016157877A1 (en) * | 2015-03-31 | 2016-10-06 | Ｊｆｅスチール株式会社 | Steel sheet for can lids and method for producing same |
| NZ744555A (en) * | 2016-02-29 | 2019-07-26 | Jfe Steel Corp | Steel sheet for can and method for manufacturing the same |
| JP6515294B2 (en) * | 2016-05-31 | 2019-05-22 | Ｊｆｅスチール株式会社 | Container steel sheet |
| JP6468405B1 (en) * | 2017-03-31 | 2019-02-13 | Ｊｆｅスチール株式会社 | Steel plate and manufacturing method thereof, crown and DRD can |
| US10837078B2 (en) * | 2017-03-31 | 2020-11-17 | Jfe Steel Corporation | Steel sheet, method of manufacturing same, crown cap, and drawing and redrawing (DRD) can |
| JP6468404B1 (en) * | 2017-03-31 | 2019-02-13 | Ｊｆｅスチール株式会社 | Steel plate and manufacturing method thereof, crown and DRD can |
| EP3663428B1 (en) * | 2017-07-31 | 2023-06-28 | JFE Steel Corporation | Steel sheet for crown cap, crown cap and method for producing steel sheet for crown cap |
| JP6822617B1 (en) * | 2019-03-29 | 2021-01-27 | Ｊｆｅスチール株式会社 | Steel sheet for cans and its manufacturing method |
| JP7131596B2 (en) * | 2019-12-04 | 2022-09-06 | Ｊｆｅスチール株式会社 | Steel plate for high-strength cans and method for manufacturing the same |
| CN110983179A (en) * | 2019-12-16 | 2020-04-10 | 首钢集团有限公司 | Steel for one-time cold rolling and continuous annealing packaging and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1112686A (en) * | 1997-04-30 | 1999-01-19 | Kawasaki Steel Corp | Steel sheet for can having excellent homogeneity and its manufacture |
| TW200948985A (en) * | 2008-04-03 | 2009-12-01 | Jfe Steel Corp | High tensile strength steel sheet for can and its production method |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60128212A (en) * | 1983-12-14 | 1985-07-09 | Nippon Steel Corp | Production of steel sheet for easy-to-open can having excellent warm strength characteristic |
| JP3285098B2 (en) * | 1992-10-08 | 2002-05-27 | 川崎製鉄株式会社 | Manufacturing method of steel sheet for cans |
| JPH06264138A (en) * | 1993-03-12 | 1994-09-20 | Nippon Steel Corp | Production of steel sheet for welded can excellent in blank layout property |
| DE69937481T2 (en) * | 1998-04-08 | 2008-08-21 | Jfe Steel Corp. | STEEL PLATE FOR A CAN AND MANUFACTURING METHOD THEREFOR |
| JP2001303183A (en) * | 2000-04-24 | 2001-10-31 | Nippon Steel Corp | Steel sheet for can small in defect and excellent in workability and its producing method |
| JP4133520B2 (en) * | 2002-11-21 | 2008-08-13 | 新日本製鐵株式会社 | Steel plate for containers with extremely good deformation resistance and method for producing the same |
| JP4328124B2 (en) * | 2003-04-24 | 2009-09-09 | 新日本製鐵株式会社 | Steel sheet for ultra-thin containers with extremely good can characteristics and manufacturing method thereof |
| WO2005103316A1 (en) * | 2004-04-27 | 2005-11-03 | Jfe Steel Corporation | Steel sheet for can and method for production thereof |
| TW200827460A (en) * | 2006-08-11 | 2008-07-01 | Nippon Steel Corp | DR steel sheet and manufacturing method thereof |
| JP4235247B1 (en) * | 2007-09-10 | 2009-03-11 | 新日本製鐵株式会社 | High-strength steel sheet for can manufacturing and its manufacturing method |
| ES2666432T3 (en) * | 2009-05-18 | 2018-05-04 | Nippon Steel & Sumitomo Metal Corporation | Ultra thin steel sheet and manufacturing process |
-
2011
- 2011-07-12 JP JP2011153718A patent/JP5794004B2/en active Active
-
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1112686A (en) * | 1997-04-30 | 1999-01-19 | Kawasaki Steel Corp | Steel sheet for can having excellent homogeneity and its manufacture |
| TW200948985A (en) * | 2008-04-03 | 2009-12-01 | Jfe Steel Corp | High tensile strength steel sheet for can and its production method |
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