US2772154A - Deep drawing steel - Google Patents
Deep drawing steel Download PDFInfo
- Publication number
- US2772154A US2772154A US599677A US59967756A US2772154A US 2772154 A US2772154 A US 2772154A US 599677 A US599677 A US 599677A US 59967756 A US59967756 A US 59967756A US 2772154 A US2772154 A US 2772154A
- Authority
- US
- United States
- Prior art keywords
- steel
- boron
- deep drawing
- yield
- percent
- 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
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
Definitions
- boron may be added as elemental boron, boron carbide, calcium-boride or ferroboron.
- a 200 ton commercial open hearth heat was then prepared having the following ladle analysis.
- the physical data tabulated above was obtained from material which was hot rolled down to 0.100 inch strip and then cold rolled to a thickness of 0.040 inch.
- the cold rolled sheet was annealed at 1320 degrees Fahrenheit using a conventional boxannealing heating schedule.
- Tension test specimens of the finished sheet steel were prestrained 10% in tension and then aged one hour at degrees centigrade and retested to failure.
- a rimmed steel which is non-aging under usual conditions of commercial storage, said steel containing approximately 0.008 percent boron.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Description
UnitedStates Patent DEEP DRAWING STEEL Eric R. Morgan, Dearborn, and John C. Shyne, Belleville, Mich., assignors to Ford Motor Company, Dearborn, Mich., a corporation of Delaware No Drawing. Application July 24, 1956, Serial No. 599,677
2 Claims. (Cl. 75-123) This invention is directed to deep drawing steels and more especially to rimmed or semi-rimmed steels possessing superior ductility and resistance to aging. This application is a continuation in part of application Serial No. 497,462 filed March 28, 1955.
Steels which are intended for subsequent deep drawing are conventionally produced by a rimming or semirimming process to secure the desired high quality of surface finish usually required of deep drawn products. These rimmed or semi-rimmed steels are subject to undesirable aging phenomena which are manifested by the appearance of a pronounced yield point and the progressive deterioration of ductility. This aging process occurs even at winter temperatures and often results in a particular batch of steel which was acceptable commercially as produced deteriorating before use to a point where deep drawing operations are impossible.
We have discovered that the addition of boron to steel to give a boron content of between 0.003% to 0.02% will yield a product which will not lose its ductility or exhibit a yield point due to storage under usual commercial conditions. The addition of this minute amount of boron does not interfere with the rimming action necessary to get a good surface finish. The boron may be added as elemental boron, boron carbide, calcium-boride or ferroboron.
To more clearly demonstrate the operation of this invention, three heats were prepared with as nearly identical chemistry as possible. The melts were produced from the pure elements under identical melting condition. The first melt was a steel containing 0.08% carbon and 0.005% nitrogen. The second melt was identical except for the addition of 0.04% vanadium. This heat is typical of good commercial practice using the teachings of Epstein contained in United States Letters Patent 2,356,- 450. In the third melt the vanadium was replaced with 0.02% boron. The physical properties of the steels resulting are tabulated below. Note the high ductility and absence of yield point in the boron treated steel.
2,772,154 Patented Nov. {27, 1956 of carbon rod, grams of ferromanganese and suflicient borax to represent an addition of 0.02% boron. When the melt down was complete and the temperaturehad reached 2900 degrees Fahrenheit themetalwas 'poi red into a ladle containing the 'bora'ir addition. This heat was made to check information contained in the following publications which deal with the reduction of borax to boron by steel or iron from supernatant slags.
Twenty-fifth Open Hearth Proceedings, 1942, pages 109 and 110. Published by the A. I. M. E., New York.
Transactions, American Institute of Mining and Metallurgical Engineers, 1946, vol. 167, pages 92 to 107. Published by the Institute, New York.
Iron and Steel Institute, vol. 171 of the 1952 Journal, pages 147 to 153.
University of Illinois Engineering Experimental Station Bulletin 77, March 1917, vol. 7, pages 1-19.
This procedure resulted in a steel having a boron content of 0.0016% which was inadequate to inhibit aging.
A 200 ton commercial open hearth heat was then prepared having the following ladle analysis.
This heat was tapped into a 200 ton ladle and teemed into 13 ton ingot molds. The characteristics of four of these 13 ton ingots is tabluated below:
Increase in Elonga- Yleld Ultimate tion, Percent Ingot Boron Strength Strength Percent Yield,
Content During (p. s. i.) in 2 Slab/Ingot Aging Inches (p. s. 1.)
A Nil 7, 750 51, 400 27. 7 89. 81 B 1 0. 008 550 42, 650 43. 5 88. 63 0.0067 250 43, 750 40. 5 88. 12 0.008 500 43, 850 42. 0 88.38
The physical data tabulated above was obtained from material which was hot rolled down to 0.100 inch strip and then cold rolled to a thickness of 0.040 inch. The cold rolled sheet was annealed at 1320 degrees Fahrenheit using a conventional boxannealing heating schedule. Tension test specimens of the finished sheet steel were prestrained 10% in tension and then aged one hour at degrees centigrade and retested to failure.
Room Temperature Tensile Tests 0.08% O, 0.005% N; 0.08% O, 0.005% Ni, 0.04% V 0.08% C, 0.005% Ni, 0.02% B Condition of Test Sample Percent Yield Elonga- Percent Yield Elonga- Percent Yield Elonga- Elonga- Strength, tion at Elouga- Strength, tion at Elonga- Strength, tion at tion 1,000 Yield tion 1,000 Yield tion 1,000 Yield 1). s. i. Point p. s. 1. Point p. s. i. Point Annealed 47 38 3. 75 56 41.9 6.0 58 33.2 5 0 Prestrained 7.5% and not aged 39. 5 39. 15 0 48. 5 37. 5 0 50. 5 31. 1 0 Prestrained 7.5% and aged for 1 hr.
at 100 C 25. 2 47. 5 2. 0 42. 0 36. 2 0 51 33. 0 0 Prestrained 7.5% and aged for 2 hrs. at 50 C 46.3 1.1 35.9 0 31. 1 0 Prestraiued 7.5% and aged for 100 hrs. at 25 C 30 50. 8 2. 2 40.7 36. 5 0 50 31. 0 0
An attempt was made to obtain the requisite boron by adding borax directly to a steel melt. The melting charge comprised 50 pounds of electrolytic iron, 20 grams We claim as our invention: 1. A rimmed steel which is non-aging under usual conbetween 0.003 percent and 0.02 percent carbon.
2. A rimmed steel which is non-aging under usual conditions of commercial storage, said steel containing approximately 0.008 percent boron.
References Cited in the file of this patent Twenty-fifth Open Hearth Proceedings, 1942, pages 109 and 110. Published by the A. T. M. 13., New York.
o 4 r a Transactions, American Institute of Miningand- Metallurgical Engineers, 1946, volume 167, pages 92 to 107. Published by the Institute, New York;
Effect of Boron on the Hardenability of I-Iigh Purity Alloys and Commercial Steel. Bureau of Standards Research paper R. P. 1938, vol. 41, 'Dec. 1948, pages 546 and 547. L
Claims (1)
1. A RIMMED STEEL WHICH IS NON-AGING UNDER USUAL CONDITIONS OF COMMERCIAL STORAGE, SAID STEEL CONTAINING FROM BETWEEN 0.003 PERCENT AND 0.02 PERCENT CARBON.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US599677A US2772154A (en) | 1956-07-24 | 1956-07-24 | Deep drawing steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US599677A US2772154A (en) | 1956-07-24 | 1956-07-24 | Deep drawing steel |
Publications (1)
Publication Number | Publication Date |
---|---|
US2772154A true US2772154A (en) | 1956-11-27 |
Family
ID=24400612
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US599677A Expired - Lifetime US2772154A (en) | 1956-07-24 | 1956-07-24 | Deep drawing steel |
Country Status (1)
Country | Link |
---|---|
US (1) | US2772154A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3239390A (en) * | 1961-04-12 | 1966-03-08 | Yawata Iron & Steel Co | Method of producing non-ageing special low carbon iron sheets |
US3282685A (en) * | 1963-08-08 | 1966-11-01 | Bethlehem Steel Corp | Low carbon steel alloy for vitreous enameling |
US3772091A (en) * | 1969-08-27 | 1973-11-13 | Bethlehem Steel Corp | Very thin steel sheet and method of producing same |
US3953245A (en) * | 1969-01-24 | 1976-04-27 | Ford Motor Company | Process for the production of drawing steel |
US3988173A (en) * | 1972-04-03 | 1976-10-26 | Nippon Steel Corporation | Cold rolled steel sheet having excellent workability and method thereof |
US3988174A (en) * | 1972-04-03 | 1976-10-26 | Nippon Steel Corporation | Hot rolled steel sheet having excellent workability and method thereof |
US4001052A (en) * | 1971-09-30 | 1977-01-04 | Kawasaki Steel Corporation | Hot-rolled low-carbon steel strip with an excellent press-workability capable of forming smooth pressed surface and a method of making the same |
US4115155A (en) * | 1974-05-03 | 1978-09-19 | Bethlehem Steel Corporation | Low carbon high yield and tensile strength steel and method of manufacture |
-
1956
- 1956-07-24 US US599677A patent/US2772154A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3239390A (en) * | 1961-04-12 | 1966-03-08 | Yawata Iron & Steel Co | Method of producing non-ageing special low carbon iron sheets |
US3282685A (en) * | 1963-08-08 | 1966-11-01 | Bethlehem Steel Corp | Low carbon steel alloy for vitreous enameling |
US3953245A (en) * | 1969-01-24 | 1976-04-27 | Ford Motor Company | Process for the production of drawing steel |
US3772091A (en) * | 1969-08-27 | 1973-11-13 | Bethlehem Steel Corp | Very thin steel sheet and method of producing same |
US4001052A (en) * | 1971-09-30 | 1977-01-04 | Kawasaki Steel Corporation | Hot-rolled low-carbon steel strip with an excellent press-workability capable of forming smooth pressed surface and a method of making the same |
US3988173A (en) * | 1972-04-03 | 1976-10-26 | Nippon Steel Corporation | Cold rolled steel sheet having excellent workability and method thereof |
US3988174A (en) * | 1972-04-03 | 1976-10-26 | Nippon Steel Corporation | Hot rolled steel sheet having excellent workability and method thereof |
US4115155A (en) * | 1974-05-03 | 1978-09-19 | Bethlehem Steel Corporation | Low carbon high yield and tensile strength steel and method of manufacture |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3102831A (en) | Production of columbium containing steels | |
US2772154A (en) | Deep drawing steel | |
US4316753A (en) | Method for producing low alloy hot rolled steel strip or sheet having high tensile strength, low yield ratio and excellent total elongation | |
US3673007A (en) | Method for manufacturing a high toughness steel without subjecting it to heat treatment | |
US3010822A (en) | Columbium containing steels, process for their manufacture and articles prepared therefrom | |
US4141761A (en) | High strength low alloy steel containing columbium and titanium | |
US4331488A (en) | Cold-rolled ultra low carbon steel sheet with improved press-forming properties | |
US3128175A (en) | Low alloy, high hardness, temper resistant steel | |
US3375105A (en) | Method for the production of fine grained steel | |
US3173782A (en) | Vanadium nitrogen steel | |
US2768892A (en) | Non-aging steel | |
US2578794A (en) | Magnesium-treated malleable iron | |
US3926686A (en) | High-strength low-alloy steel | |
US2809888A (en) | Cast iron with high creep resistance and method for making same | |
US3795506A (en) | Nonthermal refining type high tension steel exhibiting excellent cold-work-ability | |
US2771651A (en) | Method of preparing non-aging steels | |
US3494765A (en) | Weldable high strength structural steel not embrittled by stress-relieving annealings | |
US4709742A (en) | Method for producing a thin casting of Cr-series stainless steel | |
US2624669A (en) | Ferritic chromium steels | |
JPS589814B2 (en) | Manufacturing method for high-toughness, high-tensile tempered steel sheet with reduced rolling anisotropy | |
US1972248A (en) | Method of treating ferrous alloys | |
JPS6411088B2 (en) | ||
JPS63143225A (en) | Manufacture of hot rolled steel sheet having superior workability | |
US1835667A (en) | Process of hardening copper containing steels for structural and similar purposes | |
US4119445A (en) | High strength alloy of ferritic structure |