US3368886A - Atmospheric corrosion-resistant coldrolled steel sheet of deep drawing quality - Google Patents
Atmospheric corrosion-resistant coldrolled steel sheet of deep drawing quality Download PDFInfo
- Publication number
- US3368886A US3368886A US562474A US56247466A US3368886A US 3368886 A US3368886 A US 3368886A US 562474 A US562474 A US 562474A US 56247466 A US56247466 A US 56247466A US 3368886 A US3368886 A US 3368886A
- Authority
- US
- United States
- Prior art keywords
- steel sheet
- steel
- less
- deep
- atmospheric corrosion
- Prior art date
- 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
Links
- 230000007797 corrosion Effects 0.000 title description 9
- 238000005260 corrosion Methods 0.000 title description 9
- 239000010960 cold rolled steel Substances 0.000 title description 5
- 229910000831 Steel Inorganic materials 0.000 description 39
- 239000010959 steel Substances 0.000 description 38
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 229910052698 phosphorus Inorganic materials 0.000 description 15
- 239000007789 gas Substances 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 10
- 239000010949 copper Substances 0.000 description 10
- 239000011574 phosphorus Substances 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 9
- 229910052802 copper Inorganic materials 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052785 arsenic Inorganic materials 0.000 description 8
- 229910052748 manganese Inorganic materials 0.000 description 7
- 239000011572 manganese Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000000137 annealing Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 4
- 238000005261 decarburization Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000003679 aging effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- -1 0.01 to 0.08% Al Chemical compound 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910001327 Rimmed steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- NKAAEMMYHLFEFN-UHFFFAOYSA-M monosodium tartrate Chemical compound [Na+].OC(=O)C(O)C(O)C([O-])=O NKAAEMMYHLFEFN-UHFFFAOYSA-M 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- C22C38/002—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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
Definitions
- An atmospheric corrosion-resistant cold-rolled steel sheet is provided which is of deep drawing quality.
- the steel is composed of less than 0.01% C, less than 0.08% Si, 0.20 to 0.50% Mn, 0.05 to 0.12% P, 0.2 to 0.6 Cu, less than 0.05% As, less than 0.001% free N and the rest Fe accompanied by unavoidable impurities.
- This invention relates to an atmospheric corrosionresistant cold-rolled steel sheet of deep drawing quality.
- low-carbon cold-rolled steel sheets of a rimmed steel or an aluminum-killed steel are generally used for steel sheets of deep drawing quality but such steel sheets are lacking in atmospheric corrosionresistance.
- Thegalvanized iron sheets show a high anticorrosiveness when used in an automobile; however, as Welding is mostly used in assembling bodies, the plating film around the welded part will be peeled ott by heat and will be also broken by splashed gravels and mechanical rubs. The sheet will begin to rust parts around the broken film and, further the deep-drawability of the sheet is not suificient. Thus the galvanized steel sheet can hardly be said to be perfectly satisfactory.
- An object of the present invention is to provide a steel sheet which is of the same tensile-strength as an ordinary steel sheet of deep-drawing quality but has both excellent resistance to atmospheric corrosion and deep-drawability.
- the atmospheric corrosion-resistantsteel sheet having deep-drawability of the present invention is characterized by being composed of less than 0.01% C, less than 0.08% Si, 0.20 to 0.5% Mn, 0.05 to 0.12% P, 0.2 to 0.6% Cu, less than 0.05% As, less than 0.001% free N and the remainder being Fe and unavoidable impurities.
- the steel sheet of the present invention can contain one or more of such elements having a high affinity for nitrogen, such as 0.01 to 0.08% Al, less than 0.1% V and less than 0.01% B depending on the circumstances.
- carbon is contained in an amount of less than 0.01%, because it is preferable to be low for the benefit of deep-drawability and non-ageing properties, silicon is added for deoxidation in a range of less than 0.08% according to the steel making process.
- Manganese is to improve weldability as well as for deoxidation. However, when manganese is more than 0.5%, the tensile-strength will become higher and the workability will become lower. When it is less than 0.20%, the weldability and hot-rolling property will become low. Phosphorus increases the atmospheric corrosion-resistance and the tensile-strength, when it coexists with copper. But, when phosphorus is more than 0.12%, the steel will become harder.
- phosphorus is contained in the steel of the present invention in an amount so as to be able to improve the deep-drawability of the steel.
- a distinct diiference can be perceived between them in the deep-drawability, as is demonstrated by conical cup value of 37.1 mm. for the former and 35.9 mm.- for the latter. This means that the steel sheet containing more phosphorus is superior in the deep-drawability.
- Copper deteriorates the workability, when the content thereof exceeds 0.6%. Even if arsenic is not added, with phosphorus and copper, a practical resistance to atmospheric corrosion will be obtained. However, if the content of arsenic is less than 0.05%, the corrosion-resistance may improve without reducing the workability. Nitrogen (N not combined with other metals) in the steel sheet should be less than 0.001% in order that said steel sheet may be practically non-ageing.
- the chemical composition of the steel sheet must be adjusted in the steel making process and in the final heat-treating step after cold-rolling.
- a molten steel composed of less than 0.10% C, less than 0.08% Si, 0.20 to 0.50% Mn, 0.05 to 0.12% P, 0.20 to 0.60% Cu, less than 0.05% As and the rest being Fe and unavoidable accompanying elements is poured into a mold and the thus obtained ingot is slabbed, hot-rolled, cold-rolled and annealed as in the normal way.
- the molten steel may be vacuum-degassed or may be cast in a vacuum or in an inert gas, or the vacuum-degassed molten steel may be further teemed in a vacuum or in an inert gas atmosphere.
- the thus treated steel has few non-metallic inclusions and therefore has a favorable surface property and is higher in deep-drawability.
- the steel is treated in the same manner as an ordinary low-carbon steel sheet to be deep drawn.
- a material coil of the right thickness for annealing will be obtained.
- This coil is annealed to obtain recrystallization while being positively decarburized and denitrided by using a proper atmospheric gas by means of a continuous annealing line or an open coil annealing furnace.
- a mixture gas consisting of 3 to 20% hydrogen with the remainder being nitrogen (HNX gas), and if both decarburization and denitrification are to be carried out, a mixture gas is used consisting of more than 70% hydrogen with the remainder being nitrogen (AX gas).
- HNX gas hydrogen with the remainder being nitrogen
- AX gas nitrogen
- one or more elements having a high atlinity for nitrogen such as, for example, aluminum, vanadium and boron may be added to the starting molten steel in advance.
- elements having a high atlinity for nitrogen such as, for example, aluminum, vanadium and boron may be added to the starting molten steel in advance.
- 0.01 to 0.08% Al, less than 0.1% V and less than 0.01% B are added.
- these elements will have substantially no influence on the atmospheric corrosion-resistance and deep-drawability of the decarburized steel sheet.
- the thus obtained steel sheet contains less than 0.01% C, and less than 0.001% N (N not combined with other metals) when the denitrification treatment is carried out, thereby obtaining a steel having superior deep-drawability. Especially, by reducing nitrogen a practically sufiicient non-aging property is obtained and no deterioration occurs in the deepdrawability by strain ageing after skin pass rolling.
- Example 1 A cold-rolled coil 0.8 mm. thick was prepared by subjecting a molten steel having a ladle analysis shown in Table I to an ingot production process and thereafter subjecting the ingot to the required steps of slabbing, hotrolling, pickling and cold-rolling.
- the cold-rolled coil was heated up to 740 C. in an HNX gas atmosphere in an open coil annealing furnace. Then the HNX gas atmosphere was changed to an AX gas atmosphere and a steam was introduced therein. The coil was further heated in the wet AX gas atmosphere of a dew point of 40 C. for 5 to hours to carry out a decarburization annealing.
- Samples B and C show improvements not only in the atmospheric corrosion-resistance, but also in the deepdrawability as compared with those of Sample A. For instance, Samples B and C show lower values in conical cup value and much higher values in elongation, Erichsen value and strain ratio than Sample A. These values demonstrate that the products of the present invention are excellent in the press-forming property, that is, in the deep drawing property.
- the content of free nitrogen in the products of the present invention was less than 0.001%.
- Example 2 A cold-rolled coil 0.8 mm. thick made from a molten steel having a ladle composition of 0.08% C, 0.01% Si, 0.38% Mn, 0.09% P, 0.013% S, 0.41% Cu, 0.036 As and 0.0019% N and subjecting the ingot to the necessary steps from slabbing down to cold-rolling was heated to 700 C. in a dry hydrogen atmosphere of a dew point of 40 C., was then heated for 10 hours in a wet hydrogen atmosphere of a dew point of 30 C. by introducing steam, was cooled by again switching to the dry hydrogen atmosphere and was thus annealed for recrystallization.
- the chemical composition of the thus obtained product was 0.004% C, 0.01% Si, 0.38% Mn, 0.09% P, 0.012% S, 0.39% Cu, 0.0005% N, 0.036% As and impurities of 0.022% Ni, 0.017% Cr and 0.013% Sn.
- the mechanical properties of the product after the skin pass of a reduction rate of 0.6% were as follows:
Landscapes
- 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)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Steel (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4515261 | 1961-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3368886A true US3368886A (en) | 1968-02-13 |
Family
ID=12711285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US562474A Expired - Lifetime US3368886A (en) | 1961-12-11 | 1966-07-05 | Atmospheric corrosion-resistant coldrolled steel sheet of deep drawing quality |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3368886A (de) |
| DE (1) | DE1219242B (de) |
| GB (1) | GB1022256A (de) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3853544A (en) * | 1970-01-14 | 1974-12-10 | Nippon Steel Corp | Corrosion resistant steels having improved weldability |
| US3953245A (en) * | 1969-01-24 | 1976-04-27 | Ford Motor Company | Process for the production of drawing steel |
| US4014683A (en) * | 1974-12-23 | 1977-03-29 | National Steel Corporation | Method of making Drawing Quality steel |
| US4019929A (en) * | 1974-06-24 | 1977-04-26 | Nippon Kokan Kabushiki Kaisha | Enameling cold rolled steel sheet with a high enamel adhesive property |
| 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 |
| US4445946A (en) * | 1980-08-27 | 1984-05-01 | Nippon Steel Corporation | High strength cold rolled steel strip having an excellent deep drawability |
| US4473414A (en) * | 1980-03-31 | 1984-09-25 | Kawasaki Steel Corporation | High tensile strength cold rolled steel sheets and high tensile strength hot-dip galvanized steel sheets |
| EP0319590A4 (de) * | 1987-06-26 | 1989-06-21 | Nippon Steel Corp | KALTGEWALZTER FEINBLECHSTAHL MIT HOHEM r-WERT UND VERFAHREN ZU SEINER HERSTELLUNG. |
| CN102605255A (zh) * | 2012-01-19 | 2012-07-25 | 武汉钢铁(集团)公司 | 一种400Mpa级耐腐蚀钢筋 |
| CN111151284A (zh) * | 2020-01-15 | 2020-05-15 | 厦门大学 | 一种氮掺杂碳包覆的催化剂、其制备方法及其应用 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2755150B1 (fr) * | 1996-10-30 | 1998-11-20 | Lorraine Laminage | Acier ferritique a tres basse teneur en carbone, dote de proprietes de deformation elevees et d'une excellente resistance a la corrosion |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2109271A (en) * | 1936-10-05 | 1938-02-22 | Monsanto Chemicals | Vitreous enameled products |
| US2121057A (en) * | 1937-12-06 | 1938-06-21 | Republic Steel Corp | Arsenic iron alloy |
| US2165553A (en) * | 1937-09-07 | 1939-07-11 | Battelle Memorial Institute | Alloy steel |
| US2986483A (en) * | 1958-06-20 | 1961-05-30 | United States Steel Corp | Method of making sheets with elongated grain structure from rimmed steel |
| US3177070A (en) * | 1961-04-25 | 1965-04-06 | Metallurg D Esperance Longdoz | Steel for drawing, and method of manufacturing this steel |
| US3193417A (en) * | 1962-12-05 | 1965-07-06 | Inland Steel Co | Enameling steel |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2867531A (en) * | 1957-01-31 | 1959-01-06 | Gen Motors Corp | Corrosion-resistant low alloy steel |
-
1962
- 1962-11-12 GB GB42655/62A patent/GB1022256A/en not_active Expired
- 1962-11-28 DE DEY657A patent/DE1219242B/de active Pending
-
1966
- 1966-07-05 US US562474A patent/US3368886A/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2109271A (en) * | 1936-10-05 | 1938-02-22 | Monsanto Chemicals | Vitreous enameled products |
| US2165553A (en) * | 1937-09-07 | 1939-07-11 | Battelle Memorial Institute | Alloy steel |
| US2121057A (en) * | 1937-12-06 | 1938-06-21 | Republic Steel Corp | Arsenic iron alloy |
| US2986483A (en) * | 1958-06-20 | 1961-05-30 | United States Steel Corp | Method of making sheets with elongated grain structure from rimmed steel |
| US3177070A (en) * | 1961-04-25 | 1965-04-06 | Metallurg D Esperance Longdoz | Steel for drawing, and method of manufacturing this steel |
| 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 |
| US3193417A (en) * | 1962-12-05 | 1965-07-06 | Inland Steel Co | Enameling steel |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3953245A (en) * | 1969-01-24 | 1976-04-27 | Ford Motor Company | Process for the production of drawing steel |
| US3853544A (en) * | 1970-01-14 | 1974-12-10 | Nippon Steel Corp | Corrosion resistant steels having improved weldability |
| US4019929A (en) * | 1974-06-24 | 1977-04-26 | Nippon Kokan Kabushiki Kaisha | Enameling cold rolled steel sheet with a high enamel adhesive property |
| US4014683A (en) * | 1974-12-23 | 1977-03-29 | National Steel Corporation | Method of making Drawing Quality steel |
| US4473414A (en) * | 1980-03-31 | 1984-09-25 | Kawasaki Steel Corporation | High tensile strength cold rolled steel sheets and high tensile strength hot-dip galvanized steel sheets |
| US4544419A (en) * | 1980-03-31 | 1985-10-01 | Kawasaki Steel Corporation | Method for producing high tensile strength cold rolled steel sheets having excellent formability and high tensile strength hot-dip galvanized steel sheets having excellent formability |
| 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 |
| US4445946A (en) * | 1980-08-27 | 1984-05-01 | Nippon Steel Corporation | High strength cold rolled steel strip having an excellent deep drawability |
| EP0319590A4 (de) * | 1987-06-26 | 1989-06-21 | Nippon Steel Corp | KALTGEWALZTER FEINBLECHSTAHL MIT HOHEM r-WERT UND VERFAHREN ZU SEINER HERSTELLUNG. |
| CN102605255A (zh) * | 2012-01-19 | 2012-07-25 | 武汉钢铁(集团)公司 | 一种400Mpa级耐腐蚀钢筋 |
| CN111151284A (zh) * | 2020-01-15 | 2020-05-15 | 厦门大学 | 一种氮掺杂碳包覆的催化剂、其制备方法及其应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1219242B (de) | 1966-06-16 |
| GB1022256A (en) | 1966-03-09 |
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