US3215567A - Deep drawing non-aging cold rolled steel sheet and a method of producing the same - Google Patents

Deep drawing non-aging cold rolled steel sheet and a method of producing the same Download PDF

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Publication number
US3215567A
US3215567A US191369A US19136962A US3215567A US 3215567 A US3215567 A US 3215567A US 191369 A US191369 A US 191369A US 19136962 A US19136962 A US 19136962A US 3215567 A US3215567 A US 3215567A
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United States
Prior art keywords
steel sheet
steel
cold rolled
phosphorus
deep drawing
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Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
US191369A
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English (en)
Inventor
Yoshida Hiroshi
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JFE Steel Corp
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Kawasaki Steel Corp
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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
    • C21D8/0457—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 with diffusion of elements, e.g. decarburising, nitriding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/201—Work-pieces; preparation of the work-pieces, e.g. lubricating, coating
    • 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
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
    • C21D8/0426—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • 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
    • C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
    • 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
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S148/00—Metal treatment
    • Y10S148/901—Surface depleted in an alloy component, e.g. decarburized

Definitions

  • the cold rolled steel sheet is suitable to efliect such a cold work as deep drawing, the material has a broad usage. Accordingly, importance is attached to the forming property thereof, and it has been earnestly demanded by fabricators thereof to make available a more deeply drawable steel sheet at a lower cost.
  • deep drawing non-aging steel sheet has been produced from aluminum killed steel.
  • it has been intended to improve the drawability of the product by virtue of an elongated grain structure endowed by the AlN precipitating phenomenon and of the plastic-anisotropy, and also intended to prevent the aging effect by fixing nitrogen as'nitride by aluminum, which nitrogen has been contained in the material.
  • One object of this invention is to answer the demand as above.
  • a raw material for steel is so refined that a quantity of phosphorus remains in molten steel during the steel making process or a quan tity of phosphorus is added to molten steel so as to produce an ingot containing more phosphorus than the ingot in accordance with the usual cold rolled steel sheet standard.
  • the cold rolled steel sheet is subjected to, for
  • the most essential feature of this invention is the method for the production characterized in that a cold rolled steel sheet containing more than 0.030 percent and less than 0.120 percent of phosphorus is decarburized and denitrided so as tomake carbon less than 0.02 percent or less than 0.015% and nitrogen less than 0.0025 percent or less than 0.0010%.
  • a cold rolled steel sheet containing more than 0.030 percent and less than 0.120 percent of phosphorus is decarburized and denitrided so as tomake carbon less than 0.02 percent or less than 0.015% and nitrogen less than 0.0025 percent or less than 0.0010%.
  • impurities as carbon, phosphorus, sulphur and the others in steel for a deep drawing steel sheet.
  • upper limits of carbon, phosphorus, sulphur and other impurities are indicated in various standards of the cold rolled steel sheet.
  • the standard of a deep drawing cold rolled steel sheet SPC-3 indicates less than 0.08 percent of carbon, less than 0.030 percent of phosphorus, and less than 0.040 percent of sulphur
  • the standard of a commercial grade cold rolled steel sheet SPC-l indicates less than 0.12 percent of carbon, less than 0.045 percent of phosphorus, and less than 0.050 percent of sulphur.
  • an extra'deep drawing cold rolled steel strip ST-4 indicates less than 0.10 percent of carbon, less than 0.030 percent of phosphorus, and less than 0.035 percent of sulphur
  • a deep drawing cold rolled steel strip ST-2 indicates less than 0.10 percent of carbon, less than 0.060 percent of phosphorus, and less than 0.050 percent of sulphur.
  • the steel maker would especially mind reduction of impurities in steel by being particular about raw materials and paying attention to the refining in case such a high grade steel sheet as an extra-deep drawing cold rolled steel sheet is produced.
  • Another object of this invention is to provide inexpensive rimmed steel, capped steel, and semi-killed steel which are adapted to produce deep drawing non-aging cold rolled steel sheet, the drawability being more excellent than that of the usual aluminum killed extradeep drawing steel sheet.
  • Another object of this invention is to provide a method of producing a deep drawing steel sheet'more economically.
  • FIG. 1 is a cross-sectional diagram for explaining the conical cu-p testing apparatus.
  • FIG. 2 shows samples of the cold rolled steel sheets in accordance with this invention as well as commercial grade rimmed steel and deep drawing aluminum killed steel sheet, in which the draw through and the fractures appeared after conical cup tests have been subjected thereto, respectively.
  • the conical cup test was adopted.
  • a disc blank is pressed into a conical die having a vertical angle of 60 as shown in FIG. 1, until a fracture of the blank appears.
  • the conical cup value which may be abbreviated C.C.V. is determined by a mean value of the maximum and minimum of the flange diameters of the blank pressed into the die as above when the fracture has appeared.
  • Table I shows drawability and other mechanical properties of various cold rolled steel sheets, some of such conditions as phosphorus content, carbon content, nitrogen content, deoxidizing method, ingot casting method, silicon content, aluminum content, or the like being different with each other.
  • the conical cup values shown in Table I are results of the following test conditions:
  • No. 1 represents a sample of well known commercial grade rimmed steel sheets
  • Nos. 2 through 5 represent samples of the steel sheet shown as No. 1, decarburized and denitrided down to various contents, respectively
  • Nos. 6 through 16 represent samples of rimmed steel sheets, phosphorus contents thereof being various, and being decarburized and denitrided down to various contents, respectively, in which samples of Nos. 9 through 15 fall under the scope of this invention
  • No. 17 represents a sample of well known aluminum killed deep drawing steel sheet
  • No. 18 represents a sample of aluminumkilled deep drawing steel sheet containing high phosphorus
  • No. 19 represents a sample of mechanical capped steel sheet containing high phosphorus
  • No. 20 represents a sample of the steel sheet of No.
  • No. 21 represents-a sample of chemical capped steel sheet containing high phosphorus
  • No. 22 represents a sample of the steel sheet of No. 21 decarburized and denitrided, which falls under the scope of this invention
  • No. 23 represents a sample of semi-killed steel sheet containing high phosphorus
  • No. 24 represents a sample of the steel sheet of No. 23 decarburized and denitrided, which falls under the scope of this invention.
  • FIG. 2 shows seven disc blanks subjected to such a conical cup test as explained hereinbefore.
  • the seven disc blanks arranged from left to right in the view correspond to the samples Nos. 6, 1, 5, 17, 10, 13, and 11 in Table I, respectively.
  • steel sheet made merely to contain phosphorus without decarburization and denitridation shows somewhat lower drawability.
  • the tensile strength would be lowered remarkably, and it would be lowered, in some cases, down to less than 28 kg./mm. of the deep drawing steel sheet SPC-3 indicated in the Japanese Industrial Standard. It is considered that such a shortage of tensile strength as above is not only a problem on the specification but also a problem to be considered in the practical use.
  • a high phosphorus containing steel has a remarkably less yield elongation after aging treatment comparing with the usual rimmed steel.
  • the high phosphorus containing steel is more advantageous for obtaining a non-aging steel sheet.
  • Usual scrap iron and pig iron were molten in a usual basic open heart-h furnace having a capacity of tons and refined as in the case of usual low carbon rimmed steel.
  • the steel bath was chemically analyzed just before tapping as follows:
  • the hot rolling was started at a temperature of about 1200 C. and finished at a temperature of about 880 C. After a usual pickling, the hot rolled coil was cold-rolled down to a coil of 0.8 mm. in thickness and 1240 mm. in width, weighing 8760 kg. by a usual cold strip mill. The cold rolled coil was then decarburized and denitrided. The decarburization and denitridation was done employing an open coil annealing furnace by using of AX-gas, the soaking temperature being about 720 C., and the soaking time being 40 hours. At last a skin pass rolling, reduction rate being 0.5 percent, was subjected to the steel sheet as usual, yielding a steel sheet illustrated as No. ,14 in Table I.
  • a deep drawable non-aging cold rolled steel sheet I characterized by having a good drawability represented 'by a conical cup value determined by the conical cup test, said value being less than about 36.70 for a sheet of the thickness of 0.8 mm., said steel consisting essentially of less than .020% carbon, 0.0300.120% phosphorus, less than 0.0025 nitrogen and the remainder iron and incidental impurities, said steel sheet being produced by subjecting a cold rolled steel sheet containing 0.030 0.120% phosphorus to'a decarburizing and denitriding anneal.

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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)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
US191369A 1961-09-16 1962-04-30 Deep drawing non-aging cold rolled steel sheet and a method of producing the same Expired - Lifetime US3215567A (en)

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Application Number Priority Date Filing Date Title
JP3362761 1961-09-16

Publications (1)

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US3215567A true US3215567A (en) 1965-11-02

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US (1) US3215567A (fr)
BE (1) BE620805A (fr)
DE (1) DE1458422B2 (fr)
GB (1) GB1001281A (fr)
LU (1) LU41689A1 (fr)
NL (1) NL278350A (fr)
SE (1) SE302313B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262821A (en) * 1962-10-19 1966-07-26 Kawasaki Steel Co Method for producing cold rolled rimmed steel sheet or strip having non-aging property and superior deep drawability
US3303060A (en) * 1962-06-05 1967-02-07 Yawata Iron & Steel Co Atmospheric corrosion-resistant steel sheet for deep drawing
US3368886A (en) * 1961-12-11 1968-02-13 Yawata Iron & Steel Co Atmospheric corrosion-resistant coldrolled steel sheet of deep drawing quality
US3412781A (en) * 1965-09-21 1968-11-26 United States Steel Corp Process of using a low carbon steel composition in a continuous casting process
US3417463A (en) * 1965-07-09 1968-12-24 Maximilianshuette Eisenwerk Method of producing steel for sheets to be enamelled by the single-coat method
US3847682A (en) * 1972-11-14 1974-11-12 Armco Steel Corp Method of strengthening low carbon steel and product thereof
US3865637A (en) * 1970-02-02 1975-02-11 Nippon Kokan Kk Process of making cold reduced steel
US3926692A (en) * 1974-09-30 1975-12-16 United States Steel Corp Drawability of deoxidized steels by the addition of phosphorus and silicon
EP0048351A1 (fr) * 1980-08-27 1982-03-31 Nippon Steel Corporation Feuillard d'acier à résistance élevée, laminé à froid et possédant une très bonne aptitude à l'emboutissage profond
DE3138302A1 (de) * 1980-09-25 1982-06-16 Nippon Steel Corp., Tokyo "verfahren zur herstellung von kaltgewalztem bandstahl"

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1533303C2 (de) * 1966-01-15 1979-11-15 Fried. Krupp Huettenwerke Ag, 4630 Bochum Verwendung eines Stahles für die Einschichtemaillierung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2095580A (en) * 1934-06-01 1937-10-12 American Sheet & Tin Plate Steel strip and its production
US2271242A (en) * 1940-05-23 1942-01-27 Great Lakes Steel Corp Method of making nonaging steel
US2360868A (en) * 1943-01-02 1944-10-24 Carnegie Illinois Steel Corp Manufacture of nonaging steel
US3105780A (en) * 1960-09-19 1963-10-01 Gen Electric Method of decarburizing ferrous materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2095580A (en) * 1934-06-01 1937-10-12 American Sheet & Tin Plate Steel strip and its production
US2271242A (en) * 1940-05-23 1942-01-27 Great Lakes Steel Corp Method of making nonaging steel
US2360868A (en) * 1943-01-02 1944-10-24 Carnegie Illinois Steel Corp Manufacture of nonaging steel
US3105780A (en) * 1960-09-19 1963-10-01 Gen Electric Method of decarburizing ferrous materials

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3368886A (en) * 1961-12-11 1968-02-13 Yawata Iron & Steel Co Atmospheric corrosion-resistant coldrolled steel sheet of deep drawing quality
US3303060A (en) * 1962-06-05 1967-02-07 Yawata Iron & Steel Co Atmospheric corrosion-resistant steel sheet for deep drawing
US3262821A (en) * 1962-10-19 1966-07-26 Kawasaki Steel Co Method for producing cold rolled rimmed steel sheet or strip having non-aging property and superior deep drawability
US3417463A (en) * 1965-07-09 1968-12-24 Maximilianshuette Eisenwerk Method of producing steel for sheets to be enamelled by the single-coat method
US3412781A (en) * 1965-09-21 1968-11-26 United States Steel Corp Process of using a low carbon steel composition in a continuous casting process
DE1533476A1 (de) * 1965-09-21 1970-01-08 United States Steel Corp Stranggussverfahren fuer Stahl
US3865637A (en) * 1970-02-02 1975-02-11 Nippon Kokan Kk Process of making cold reduced steel
US3847682A (en) * 1972-11-14 1974-11-12 Armco Steel Corp Method of strengthening low carbon steel and product thereof
US3926692A (en) * 1974-09-30 1975-12-16 United States Steel Corp Drawability of deoxidized steels by the addition of phosphorus and silicon
EP0048351A1 (fr) * 1980-08-27 1982-03-31 Nippon Steel Corporation Feuillard d'acier à résistance élevée, laminé à froid et possédant une très bonne aptitude à l'emboutissage profond
DE3138302A1 (de) * 1980-09-25 1982-06-16 Nippon Steel Corp., Tokyo "verfahren zur herstellung von kaltgewalztem bandstahl"

Also Published As

Publication number Publication date
GB1001281A (en) 1965-08-11
DE1458422B2 (de) 1970-10-15
LU41689A1 (fr) 1962-07-11
NL278350A (fr)
DE1458422A1 (de) 1969-01-23
BE620805A (fr) 1962-11-16
SE302313B (fr) 1968-07-15

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