US3926692A - Drawability of deoxidized steels by the addition of phosphorus and silicon - Google Patents

Drawability of deoxidized steels by the addition of phosphorus and silicon Download PDF

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Publication number
US3926692A
US3926692A US510844A US51084474A US3926692A US 3926692 A US3926692 A US 3926692A US 510844 A US510844 A US 510844A US 51084474 A US51084474 A US 51084474A US 3926692 A US3926692 A US 3926692A
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Prior art keywords
steels
percent
drawability
phosphorus
steel
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Expired - Lifetime
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US510844A
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English (en)
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David C Ludwigson
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United States Steel Corp
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United States Steel Corp
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Publication date
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Priority to US510844A priority Critical patent/US3926692A/en
Priority to BE160336A priority patent/BE833772A/xx
Priority to BR7506215*A priority patent/BR7506215A/pt
Priority to CA236,582A priority patent/CA1043592A/en
Priority to NL7511464A priority patent/NL7511464A/xx
Priority to JP50116542A priority patent/JPS5160623A/ja
Priority to IT69410/75A priority patent/IT1047328B/it
Priority to DE19752543366 priority patent/DE2543366A1/de
Priority to FR7529944A priority patent/FR2286203A1/fr
Application granted granted Critical
Publication of US3926692A publication Critical patent/US3926692A/en
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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
    • 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

Definitions

  • Isotropic steels have been produced with 7 and Ar values near 1.0 and 0.0, respectively. Such steels have limited deep drawability but excellent resistance to eating. Cold-rolled rimmed sheet steels generally exhibit Yand Ar of about 1.2 and +0.4, respectively. Such steels can be subjected to mild deep drawing operations, but develop detrimental earing. Drawing-quality special-killed (DQSK) steels are often characterized by Tand Ar values near 1.5 and +0.5, respectively. Although these steels can Withstand severe draws, they too tend to suffer from earing; and they are more costly to produce than rimmed steels. Recently sheet steels containing columbium or titanium to combine with interstitial elements have appeared. These steels have? values of 2.0 or more and thus can withstand very severe deep drawing.
  • DQSK Drawing-quality special-killed
  • Earing tendency may be small in some instances, as indicated by Ar values near 0. l or high in other instances, as indicated by Ar values near +0.5.
  • Ar values near 0. l or high in other instances as indicated by Ar values near +0.5.
  • these steels are very costly to produce.
  • a significantly more economical method for improving deep drawability is through the addition of phosphorus to unkilled steels.
  • U.S. Pat. Nos. 3,215,567 and 3,244,565 show that the addition of greater than about 0.03 percent phosphorus to an unkilled steel, followed by a decarburization of the sheet product, can significantly improve deep drawability.
  • the r values of these steels only approach those of the above noted QSK steels.
  • FIG. 1 shows the interacting effects of Mn and P on r value
  • FIG. 2 shows the beneficial effect, on r value, of Si additions to a phosphorus containing steel.
  • the anisotropy that results in favorable 7 and Ar values is developed through metallurgical reactions in the steel that favor certain orientations of individual grains in the steel with respect to the steel surface and rolling direction.
  • high 7values are observed.
  • a series of heats were prepared with planned variations of the following elements; manganese, phosphorus, sulfur, silicon, copper, nickel, oxygen and nitrogen.
  • each heat was finish hot-rolled to a nominal thickness of 0.09 inch, at a temperature of about 1650F and the resultant band slow cooled from ll50F to simulate the thermal history of commercial coiled product. After descaling, each band was cold reduced to a nominal thickness of 0.030 inch, i.e., to an aim cold reduction of about 67 percent.
  • the resultant cold-reduced strips were recrystallization-annealed in conventional manner and subsequently evaluated for both ?and Ar values. From the data on the experimental steel compositions, and with the use of regression analysis; the relationship of Fand Ar as a function of the levels of the above noted alloy elements was derived.
  • the level of P has only a slight or negligible effect on ?value. More importantly, however, with Mn levels of about 0.22 percent or less, the T value materially increases with increasing phosphorus contents; this beneficial effect of phosphorus becoming even more pronounced with progressively decreasing manganese contents.
  • Example 1 provided for comparison, is a control sample wherein p is outside the scope of this invention.
  • Examples 2 and 3 are compositions within the scope of this up the S present in steel; thereby rendering the steel 5 invention.
  • said product having been produced from a steel melt which was killed in order to reduce the oxygen content thereof to said maximum percentage.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
US510844A 1974-09-30 1974-09-30 Drawability of deoxidized steels by the addition of phosphorus and silicon Expired - Lifetime US3926692A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US510844A US3926692A (en) 1974-09-30 1974-09-30 Drawability of deoxidized steels by the addition of phosphorus and silicon
BE160336A BE833772A (fr) 1974-09-30 1975-09-24 Amelioration par des additions de phosphore et de silicium de l'aptitude a l'emboutissage profond des aciers desoxydes
BR7506215*A BR7506215A (pt) 1974-09-30 1975-09-26 Produto de aco em chapa capaz de ser estirado em profundidade
NL7511464A NL7511464A (nl) 1974-09-30 1975-09-29 Werkwijze ter verbetering van de trekeigen- schappen van roestwerende staalsoorten, als- mede voortbrengsels, verkregen met behulp van deze werkwijze.
CA236,582A CA1043592A (en) 1974-09-30 1975-09-29 Drawability of deoxidized steels by the addition of phosphorus and silicon
JP50116542A JPS5160623A (en) 1974-09-30 1975-09-29 Fukashiboryoshiitoko
IT69410/75A IT1047328B (it) 1974-09-30 1975-09-29 Lamiera di acciaio con migliorate caratteristiche di imbutitura
DE19752543366 DE2543366A1 (de) 1974-09-30 1975-09-29 Stahlblecherzeugnis in tiefziehguete
FR7529944A FR2286203A1 (fr) 1974-09-30 1975-09-30 Amelioration par des additions de phosphore et de silicium de l'aptitude a l'emboutissage profond des aciers desoxydes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US510844A US3926692A (en) 1974-09-30 1974-09-30 Drawability of deoxidized steels by the addition of phosphorus and silicon

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US3926692A true US3926692A (en) 1975-12-16

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US (1) US3926692A (enExample)
JP (1) JPS5160623A (enExample)
BE (1) BE833772A (enExample)
BR (1) BR7506215A (enExample)
CA (1) CA1043592A (enExample)
DE (1) DE2543366A1 (enExample)
FR (1) FR2286203A1 (enExample)
IT (1) IT1047328B (enExample)
NL (1) NL7511464A (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066474A (en) * 1974-01-31 1978-01-03 Nippon Kokan Kabushiki Kaisha Method of making high strength cold reduced steel by continuous annealing process
US4441936A (en) * 1980-04-09 1984-04-10 Nippon Steel Corporation High-strength, low-yield-point, cold-rolled steel sheet or strip suitable for deep drawing
US20090308504A1 (en) * 2006-03-31 2009-12-17 Jft Steel Corporation, A Corporation Of Japan Steel sheet excellent in fine blanking performance and manufacturing method of the same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215567A (en) * 1961-09-16 1965-11-02 Kawasaki Steel Co Deep drawing non-aging cold rolled steel sheet and a method of producing the same
US3522110A (en) * 1966-02-17 1970-07-28 Nippon Steel Corp Process for the production of coldrolled steel sheets having excellent press workability
US3668016A (en) * 1968-03-02 1972-06-06 Nippon Steel Corp Process for producing cold-rolled steel plate high in the cold-formability
US3709744A (en) * 1970-02-27 1973-01-09 United States Steel Corp Method for producing low carbon steel with exceptionally high drawability
US3806373A (en) * 1968-03-02 1974-04-23 M Kawaharada Process for producing cold-rolled steel plates high in the cold-formability
US3843415A (en) * 1969-07-11 1974-10-22 United States Steel Corp Method of producing enameling iron,and enameling iron compositions and articles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215567A (en) * 1961-09-16 1965-11-02 Kawasaki Steel Co Deep drawing non-aging cold rolled steel sheet and a method of producing the same
US3522110A (en) * 1966-02-17 1970-07-28 Nippon Steel Corp Process for the production of coldrolled steel sheets having excellent press workability
US3668016A (en) * 1968-03-02 1972-06-06 Nippon Steel Corp Process for producing cold-rolled steel plate high in the cold-formability
US3806373A (en) * 1968-03-02 1974-04-23 M Kawaharada Process for producing cold-rolled steel plates high in the cold-formability
US3843415A (en) * 1969-07-11 1974-10-22 United States Steel Corp Method of producing enameling iron,and enameling iron compositions and articles
US3709744A (en) * 1970-02-27 1973-01-09 United States Steel Corp Method for producing low carbon steel with exceptionally high drawability

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066474A (en) * 1974-01-31 1978-01-03 Nippon Kokan Kabushiki Kaisha Method of making high strength cold reduced steel by continuous annealing process
US4441936A (en) * 1980-04-09 1984-04-10 Nippon Steel Corporation High-strength, low-yield-point, cold-rolled steel sheet or strip suitable for deep drawing
US20090308504A1 (en) * 2006-03-31 2009-12-17 Jft Steel Corporation, A Corporation Of Japan Steel sheet excellent in fine blanking performance and manufacturing method of the same

Also Published As

Publication number Publication date
CA1043592A (en) 1978-12-05
FR2286203A1 (fr) 1976-04-23
IT1047328B (it) 1980-09-10
NL7511464A (nl) 1976-04-01
BR7506215A (pt) 1976-08-03
BE833772A (fr) 1976-03-24
FR2286203B3 (enExample) 1978-05-12
JPS5160623A (en) 1976-05-26
DE2543366A1 (de) 1976-04-08

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Owner name: USX CORPORATION, A CORP. OF DE, STATELESS

Free format text: MERGER;ASSIGNOR:UNITED STATES STEEL CORPORATION (MERGED INTO);REEL/FRAME:005060/0960

Effective date: 19880112