GB1451963A - Process for producing tough high tensile steelp - Google Patents
Process for producing tough high tensile steelpInfo
- Publication number
- GB1451963A GB1451963A GB4877773A GB4877773A GB1451963A GB 1451963 A GB1451963 A GB 1451963A GB 4877773 A GB4877773 A GB 4877773A GB 4877773 A GB4877773 A GB 4877773A GB 1451963 A GB1451963 A GB 1451963A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reduction
- rolling
- reductions
- temperature range
- steel
- 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
Links
Classifications
-
- 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
- C21D8/0226—Hot rolling
Abstract
1451963 Rolling plates &c at speeified temperatures NIPPON STEEL CORP 19 Oct 1973 [19 Oct 1972] 48777/73 Headings B3A and B3V High toughness, high tensile strength steel plate, sheet or strip is produced from low-carbon or low-carbon low-alloy steel slab by hot-rolling with one or more reductions within a temperatture range at which recrystallization of austenite by hot rolling can occur, at least the final reduction in the temperature range being effected at a rate not less than a minimum value at the sleeted strain rate and temperature such that refinement of the austenite grains occurs at least mainly during the reduction (i.e. dynamic recrystallization), the strain rate being indicated for purposes of determining the minimum reduction by the parameter N#Ro/H, where Ro and H are respectively the radius of the reduction rolls and slab thickness before reduction in mm., and N is the speed of the rolls in r.p.m. The slab composition may include #0À30 wt. per cent C and #0À15% Nb, the temperature range being 1150-980 C. The steel may also include 0À01-0À70% Si and 0À70%-2À0% Mn, (C+Mn+Nb) # 1À35%. Minimum reductions for various temperatures and strain rates are given in Figs. 1 and 2 (not shown), the curves of Fig. 2 being used to determine the first reduction if this is effected within the temperature range after cooling from a higher temperature. Further rolling reductions may follow between 950 and 880 C. to Ar 3 with a total reduction not less than 45% of the thickness at 950 C. An alternative composition includes #0À30% C, #0À70% Si, #2À0% Mn, the temperature range being 1150-850 C. and the reduction found from the curves of Fig. 3 (not shown). Further reductions in this case may take place between 820 and 800 C. to Ar 3 with a total reduction #20% of the thickness at 820 C. After rolling the steel is cooled at 8-40 C./sec. and coiled at 680-550 C. The composition may also include N#0À1%, Al#0À8%, V#0À20%, B#0À005%, Ni#1À5%, Cu#2À0%, Cr#1À0%, Ce#0À2%, Zr#0À1%, Ti (0À15%-Nb percent). Table 1 in the Specification gives a detailed composition of three of the alloys.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10399172A JPS5324892B2 (en) | 1972-10-19 | 1972-10-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1451963A true GB1451963A (en) | 1976-10-06 |
Family
ID=14368754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4877773A Expired GB1451963A (en) | 1972-10-19 | 1973-10-19 | Process for producing tough high tensile steelp |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3918999A (en) |
| JP (1) | JPS5324892B2 (en) |
| CA (1) | CA997256A (en) |
| DE (1) | DE2352308A1 (en) |
| FR (1) | FR2203880B1 (en) |
| GB (1) | GB1451963A (en) |
| IT (1) | IT1001598B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3201204A1 (en) * | 1982-01-16 | 1983-08-11 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg | "USE OF A CARBON MANGANE STEEL FOR COMPONENTS WITH HIGH STRENGTH AND TOUGHNESS WITH SIMPLE HEAT TREATMENT" |
| DE3320896C1 (en) * | 1983-06-09 | 1984-08-16 | Bayerische Motoren Werke AG, 8000 München | Control device of a pressure die-casting machine |
| DE3434743A1 (en) * | 1984-09-21 | 1986-04-03 | M.A.N.-B & W Diesel GmbH, 8900 Augsburg | Process for producing bar-shaped machine components |
| DE3434744A1 (en) * | 1984-09-21 | 1986-04-03 | M.A.N.-B & W Diesel GmbH, 8900 Augsburg | Process for producing hot-rolled bars |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4115155A (en) * | 1974-05-03 | 1978-09-19 | Bethlehem Steel Corporation | Low carbon high yield and tensile strength steel and method of manufacture |
| JPS5173951A (en) * | 1974-12-24 | 1976-06-26 | Nippon Steel Corp | Atsukohanno atsuenhoho |
| US4011106A (en) * | 1975-06-18 | 1977-03-08 | Nippon Steel Corporation | Hot-rolled steel sheet of high cold formability and method of producing such steel sheet |
| IT1074206B (en) * | 1975-12-01 | 1985-04-17 | Nippon Steel Corp | PROCEDURE FOR PREPARING A STEEL PRODUCT |
| US4397698A (en) * | 1979-11-06 | 1983-08-09 | Republic Steel Corporation | Method of making as-hot-rolled plate |
| EP0030309B1 (en) * | 1979-12-06 | 1985-02-13 | Preussag Stahl Aktiengesellschaft | Hot rolled strip or plate of denitrided steel and process for its production |
| JPH0342632Y2 (en) * | 1985-07-13 | 1991-09-06 | ||
| US5542995A (en) * | 1992-02-19 | 1996-08-06 | Reilly; Robert | Method of making steel strapping and strip and strapping and strip |
| JP5582274B2 (en) * | 2012-07-31 | 2014-09-03 | 新日鐵住金株式会社 | Cold-rolled steel sheet, electrogalvanized cold-rolled steel sheet, hot-dip galvanized cold-rolled steel sheet, alloyed hot-dip galvanized cold-rolled steel sheet, and production methods thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3328211A (en) * | 1963-12-05 | 1967-06-27 | Ishikawajima Harima Heavy Ind | Method of manufacturing weldable, tough and high strength steel for structure members usable in the ashot-state and steel so made |
| US3645801A (en) * | 1968-12-20 | 1972-02-29 | Bethlehem Steel Corp | Method of producing rolled steel having high-strength and low-impact transition temperature |
| US3726723A (en) * | 1970-05-11 | 1973-04-10 | American Metal Climax Inc | Hot-rolled low alloy steels |
-
1972
- 1972-10-19 JP JP10399172A patent/JPS5324892B2/ja not_active Expired
-
1973
- 1973-10-15 US US406283A patent/US3918999A/en not_active Expired - Lifetime
- 1973-10-18 DE DE19732352308 patent/DE2352308A1/en active Pending
- 1973-10-18 CA CA183,667A patent/CA997256A/en not_active Expired
- 1973-10-18 FR FR7337187A patent/FR2203880B1/fr not_active Expired
- 1973-10-19 GB GB4877773A patent/GB1451963A/en not_active Expired
- 1973-10-19 IT IT30303/73A patent/IT1001598B/en active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3201204A1 (en) * | 1982-01-16 | 1983-08-11 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg | "USE OF A CARBON MANGANE STEEL FOR COMPONENTS WITH HIGH STRENGTH AND TOUGHNESS WITH SIMPLE HEAT TREATMENT" |
| DE3320896C1 (en) * | 1983-06-09 | 1984-08-16 | Bayerische Motoren Werke AG, 8000 München | Control device of a pressure die-casting machine |
| DE3434743A1 (en) * | 1984-09-21 | 1986-04-03 | M.A.N.-B & W Diesel GmbH, 8900 Augsburg | Process for producing bar-shaped machine components |
| DE3434744A1 (en) * | 1984-09-21 | 1986-04-03 | M.A.N.-B & W Diesel GmbH, 8900 Augsburg | Process for producing hot-rolled bars |
Also Published As
| Publication number | Publication date |
|---|---|
| US3918999A (en) | 1975-11-11 |
| FR2203880B1 (en) | 1976-10-01 |
| FR2203880A1 (en) | 1974-05-17 |
| IT1001598B (en) | 1976-04-30 |
| CA997256A (en) | 1976-09-21 |
| JPS4962320A (en) | 1974-06-17 |
| DE2352308A1 (en) | 1974-05-02 |
| JPS5324892B2 (en) | 1978-07-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |