WO2004076703A1 - Feuille d'acier pour boitier de support d'enregistrement, procede de production et boitier de support d'enregistrement - Google Patents

Feuille d'acier pour boitier de support d'enregistrement, procede de production et boitier de support d'enregistrement Download PDF

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Publication number
WO2004076703A1
WO2004076703A1 PCT/JP2004/001703 JP2004001703W WO2004076703A1 WO 2004076703 A1 WO2004076703 A1 WO 2004076703A1 JP 2004001703 W JP2004001703 W JP 2004001703W WO 2004076703 A1 WO2004076703 A1 WO 2004076703A1
Authority
WO
WIPO (PCT)
Prior art keywords
recording medium
steel sheet
weight
rolling
housing
Prior art date
Application number
PCT/JP2004/001703
Other languages
English (en)
Japanese (ja)
Inventor
Toshiyuki Ueda
Hiroyasu Itoh
Satoshi Ohi
Shinichi Aoki
Original Assignee
Toyo Kohan Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Kohan Co., Ltd. filed Critical Toyo Kohan Co., Ltd.
Publication of WO2004076703A1 publication Critical patent/WO2004076703A1/fr

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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0242—Flattening; Dressing; Flexing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0273—Final recrystallisation annealing
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/03—Containers for flat record carriers
    • G11B23/0301—Details
    • G11B23/0313—Container cases
    • G11B23/0315—Materials
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G11B33/04—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon modified to store record carriers
    • G11B33/0405—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon modified to store record carriers for storing discs
    • G11B33/0411—Single disc boxes
    • G11B33/0422—Single disc boxes for discs without cartridge

Definitions

  • the present invention relates to a steel plate for a housing of a recording medium used for protecting a recording medium such as a CD-ROM, a CD-R, a CD-RW, and a MO, a method of manufacturing a steel plate for a housing of a recording medium, and recording.
  • the present invention relates to a medium housing.
  • a stainless steel plate having excellent mechanical strength and corrosion resistance is used as a material of a housing used to protect recording media such as CD-ROM, CD-R, CD-RW, and MO. Have been.
  • the present invention has been made in view of these points, and an object of the present invention is to provide a steel plate for a casing of a recording medium which is inexpensive and has excellent mechanical properties, a method for manufacturing the same, and a casing for the recording medium. I do.
  • the tensile strength (tensile strength: hereinafter, TS) of JIS No. 5 piece must be 50 OMPa or more, and the elongation of 15% or more (total elongation: hereafter, T.
  • the present inventors have conducted intensive studies. As a result, by weight%, C: 0.08 to 0.60%, Si: 1.0 to 3.0% Mn: 0.5 to 3 0%, P: ⁇ 0.06%, S ⁇ 0.06%, A1: ⁇ 0.1%, N: 0.0010-0.0150%, balance Fe and inevitable impurities
  • the present inventors have found that a steel sheet made of such a material is excellent as a material for a casing of a recording medium, and have completed the present invention.
  • the steel sheet for a casing of a recording medium according to claim 1 is, in terms of% by weight, C: 0.08 to 0.60%, Si: 1.0 to 3.0%, and Mn: 0.5 to 3.0. %, P: ⁇ 0.06%, S: ⁇ 0.06%, A1: ⁇ 0.1%, N: 0.0010 ⁇ 0.0150%, balance Fe and inevitable impurities Features.
  • the method for producing a steel sheet for a housing of a recording medium according to claim 2 is as follows: C: 0.08 to 0.60%, Si: 1.0 to 3.0%, Mn: 0.5% by weight. ⁇ 3.0%, P: ⁇ 0.06%, S: ⁇ 0.06%, A1: ⁇ 0.1%, N: 0.0010 ⁇ 0.0150
  • the casing of the recording medium may be a steel sheet for a casing of a recording medium according to claim 1 or a steel sheet for a casing of a recording medium manufactured by the method for producing a steel sheet for a casing of a recording medium according to claim 2. It is characterized in that it was created using
  • FIG. 1 is a perspective view showing an embodiment of the housing of the recording medium of the present invention.
  • the housing of the recording medium of the present invention is formed, for example, as shown in FIG.
  • the housing 1 of the recording medium in FIG. 1 is formed for a CD-ROM, and is formed in a thin box shape so as to accommodate the CD-ROM 3 therein by using a steel plate 2 for the housing of the recording medium. Being manufactured.
  • the overall shape of the housing 1 of the recording medium is a general one, and one of the two side parts 4, 4 has access to a driving means for rotating the CD-ROM 3 and a reading means (both not shown).
  • a notch portion 5 is formed to allow a necessary shirt (not shown) and the like to be provided.
  • composition of the steel sheet for the housing of the recording medium of the present invention is, by weight%, C: 0.08 to 0.60.
  • S i 1.0 to 3.0%
  • Mn 0.5 to 3.0%
  • P ⁇ 0.06%
  • S ⁇ 0.06%
  • A1 ⁇ 0.1%
  • N 0.0010 to 0.0150%
  • the C is desirably present in an amount of 0.08% by weight or more in order to add a high degree of tempering to the steel sheet for the housing of the recording medium.
  • the content exceeds 0.60% by weight, the amount of carbide precipitation increases, resulting in a reduction in the workability of the steel sheet for the recording medium housing, and at the same time, an increase in the load of the cold rolling, deterioration of the shape, and an increase in the continuous annealing process. It may cause a decrease in productivity such as inhibition of plate properties. Therefore, in the present invention, the upper limit of the component C is set to 0 to 60% by weight.
  • Mn is a component necessary to prevent red-hot brittleness during hot rolling due to S, which is an impurity, and at the same time, imparts a high degree of tempering to the steel sheet for the housing of the recording medium as in C above. Therefore, the Mn component should be 0.5% by weight or more. Again, as in C, too much causes an increase in cold rolling load, cracks during slab rolling, shape deterioration, and impaired productivity in the continuous annealing process, etc. Therefore, the upper limit is set to 3.0% by weight
  • P is a component for refining crystal grains, and is added at a certain ratio to increase the strength of a steel sheet for a housing of a recording medium, but impairs corrosion resistance.
  • the corrosion resistance, particularly the pitting resistance is significantly reduced, so the upper limit is set to 0.06% by weight.
  • S is an impurity component that causes red-hot embrittlement during hot rolling, and it is desirable that it be as small as possible.However, it cannot be completely prevented from being mixed in with iron ore, etc., and desulfurization during the process is difficult. Unavoidable. Since red hot embrittlement due to a small amount of residual S can be reduced by Mn, the upper limit of the S component is 0.06 weight. / 0 .
  • A1 is added to the steel bath as a deoxidizing agent in steelmaking, but when it becomes 0.10% by weight or more, it is used as an antioxidant during continuous production and as an anti-seizure agent for molds in continuous production.
  • the excess A1 reacts with the oxygen in the ⁇ type powder to inhibit the original powder effect. Therefore, the amount of A1 should be 0.10% by weight or less.
  • N like C and Mn, gives a high degree of tempering to the steel sheet for the housing of the recording medium. Although it is a necessary component for strengthening the steel, if it is less than 0.001% by weight, it will be difficult to make steel. The yield is remarkably reduced and the stability is lacking. At the same time, the anisotropy during press molding is significantly deteriorated. Further, since cracks occur on the surface of the continuous structure and cause structure defects, in the present invention, the range of the N component is set to 0.001 to 0.0150% by weight. More preferably, the content is 0.0021 to 0.0150% by weight.
  • Si is a key feature of the present invention. Si has a large solid solution strengthening ability in steel and is an effective element for obtaining spring properties. Therefore, 1.0% by weight or more is necessary. In addition, the more the material is strengthened, the better. The upper limit is set to 3.0% by weight to increase the shape and deteriorate the shape.
  • the slab heating temperature in the hot rolling step is not specified in the present invention, but is preferably 1100 ° C or more from the viewpoint of active decomposition of N and stable securing of the hot finish rolling temperature. . If the hot rolling finishing temperature is lower than Ar 3 points, the crystal structure of the hot steel strip is mixed and coarsened, and the desired strength cannot be obtained.Therefore, the hot rolling finishing temperature is higher than Ar 3 points. It is desirable to do.
  • Winding temperature shall be 450 ° C ⁇ 650 ° C.
  • the lower limit is 450 ° C in consideration of the quality stability of the coil in the width and length directions during hot rolling. If the winding temperature exceeds 650 ° C, the crystal grain size increases during hot rolling and continuous annealing, which may cause defects when processing into a recording medium housing. It is desirable to do the following.
  • This cold rolling ratio is an important strength factor of the present invention together with the components, and is 50 to 90 to obtain the desired strength. Perform in%.
  • the material that has been cold-rolled by 50 to 90% as described above is degreased in the cleaning process, and then subjected to continuous annealing at 630 to 870 ° C, preferably 680 to 870 ° C. .
  • continuous annealing at 630 to 870 ° C, preferably 680 to 870 ° C. .
  • the annealing time may be within the range of recrystallization.
  • the thickness of the sheet is not particularly limited, but is preferably in the range of 0.2 :! to 0.5 mm, more preferably 0.2 to 0.35 mm.
  • the sheet steel for a housing of the recording medium of the present invention prepared in this way includes sheet-like and coil-like steel sheets, steel foils, and those obtained by subjecting these steel sheets to surface treatment. Is raised.
  • Those that have undergone chemical conversion are excellent in terms of corrosion resistance.
  • known treatments can be applied, and for example, a mouth mate treatment, a phosphate treatment, an electrolytic vanadium treatment, a silicate treatment or a lithium silicate treatment can be applied.
  • Table 1 shows the steel composition and the production conditions such as the rolling reduction
  • Table 2 shows the characteristics evaluation results of the examples and comparative examples of the present invention.
  • those without secondary rolling had a surface roughness (JISB 0102, Ra) of 0.8 ⁇ by temper rolling.
  • Sample numbers 1 to 4 and 7 to 12 contain 0.5 mm zinc with a thickness of 0.3 mm. / 0 Cobalt-0.01% by weight molybdenum composite plating (zinc plating amount: 15 g Zm 2 ), followed by chromate treatment so that the adhesion amount as Cr becomes 38 mg Zm 2 .
  • 5 to 6 and 13 to 16 contain a 0.2 mm thick zinc-0.5% by weight cobalt-0.01% by weight molybdenum composite plating (zinc plating amount: 10 g / m 2 ). After the application, electrolytic vanadium treatment was performed so that the amount of adhesion as V became 7 Omg / m 2 .
  • the samples Nos. 1 to 6 of the examples are excellent in tensile strength and elongation, and can be used for a casing of a recording medium.
  • Sample Nos. 7 to 8 and 12 have low tensile strength and thus lack strength.
  • Sample Nos. 9 to 11 and 13 to 16 have low elongation and poor workability.
  • Example 1 0.09 1.5 2.5 0.030 0.031 0.0050 70% 820 ° C 5%
  • the steel sheet for a housing of a recording medium, the method of manufacturing the same, and the housing of the recording medium of the present invention are inexpensive and have excellent mechanical properties.
  • the composition of the material used for the steel sheet for the housing of the recording medium of the present invention is 0 / o in weight, C: 0.08 to 0.60%, S i: 1 • 0 to 3.0%, Mn: 0.5 to 3.0%, P: ⁇ 0.06%, S: ⁇ 0.06% s A1: ⁇ 0.1%, N: 0.0010 to 0.0150%, balance Fe And unavoidable impurities, as shown in Tables 1 and 2, It exhibits excellent mechanical properties (tensile strength and elongation) and can be used as a housing for recording media used to protect recording media such as CD_ROM, CD-R, CD-RW and MO. Also, since it is cheaper than conventional stainless steel, it is suitable as an economical recording medium housing.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

L'invention concerne une feuille d'acier destinée à des boîtiers de support d'enregistrement utilisés pour protéger des supports d'enregistrement tels que des CD-ROM, CD-R, CD-RW et MO. L'invention concerne également un procédé permettant de produire une feuille d'acier et un boîtier de support d'enregistrement. La feuille d'acier destinée à des supports d'enregistrement est caractérisée en ce que sa composition chimique comprend en poids: 0,08 à 0,60% de C, 1,0 à 3,0% de Si, 0,5 à 3,0% de Mn, ≤ 0,06% de P, ≤ 0,06% de S, ≤ 0,1% de Al, 0,0010 à 0,0150% de N, le reste étant composé de Fe et d'impuretés inévitables.
PCT/JP2004/001703 2003-02-28 2004-02-17 Feuille d'acier pour boitier de support d'enregistrement, procede de production et boitier de support d'enregistrement WO2004076703A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-053270 2003-02-28
JP2003053270A JP2004263225A (ja) 2003-02-28 2003-02-28 記録媒体の筐体用鋼板、その製造法および記録媒体の筐体

Publications (1)

Publication Number Publication Date
WO2004076703A1 true WO2004076703A1 (fr) 2004-09-10

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PCT/JP2004/001703 WO2004076703A1 (fr) 2003-02-28 2004-02-17 Feuille d'acier pour boitier de support d'enregistrement, procede de production et boitier de support d'enregistrement

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JP (1) JP2004263225A (fr)
TW (1) TWI240006B (fr)
WO (1) WO2004076703A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4965802B2 (ja) * 2004-11-11 2012-07-04 東洋鋼鈑株式会社 リチウム電池のケース用鋼板、リチウム電池のケース用表面処理鋼板、電池ケースおよびリチウム電池
JP4698205B2 (ja) * 2004-11-11 2011-06-08 東洋鋼鈑株式会社 電池ケース用鋼板、電池ケース用表面処理鋼板、電池ケースおよび電池

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04180524A (ja) * 1990-11-14 1992-06-26 Nisshin Steel Co Ltd 加工性の優れた制振鋼板の製造方法
JP2002100145A (ja) * 2000-09-27 2002-04-05 Fuji Photo Film Co Ltd 磁気ディスクカートリッジ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04180524A (ja) * 1990-11-14 1992-06-26 Nisshin Steel Co Ltd 加工性の優れた制振鋼板の製造方法
JP2002100145A (ja) * 2000-09-27 2002-04-05 Fuji Photo Film Co Ltd 磁気ディスクカートリッジ

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TW200418995A (en) 2004-10-01
TWI240006B (en) 2005-09-21
JP2004263225A (ja) 2004-09-24

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