EP1008667B1 - Verfahren zur Herstellung feuerresistenter Stahlbleche - Google Patents
Verfahren zur Herstellung feuerresistenter Stahlbleche Download PDFInfo
- Publication number
- EP1008667B1 EP1008667B1 EP99123536A EP99123536A EP1008667B1 EP 1008667 B1 EP1008667 B1 EP 1008667B1 EP 99123536 A EP99123536 A EP 99123536A EP 99123536 A EP99123536 A EP 99123536A EP 1008667 B1 EP1008667 B1 EP 1008667B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yield strength
- temperature
- strip
- sheets
- 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 - 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
-
- 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 of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Definitions
- the invention relates to a method for producing fire-resistant steel sheets with a yield strength Re> 235 N / mm 2 and a yield strength ratio Re / Rm (yield strength R e; tensile strength R m ) between 0.4 and 0.65, in particular between 0.4 and 0.6, for use in steel construction.
- Fire resistant steels must have high heat resistance have, so in steel construction a reduction of expensive Fire protection measures is made possible. At the same time a fire resistant steel to achieve a good one Deformation behavior a very low yield ratio Show Re / Rm. This increases the security of the Construction against mechanical failure Burden.
- the steels to be created according to the invention also have the construction steel for steel structures requirements regarding To meet toughness and processing behavior and increased resistance to atmospheric corrosion To have (weather resistance).
- the critical temperature is reached when the at this temperature measured yield point below 2/3 of the yield point measured at room temperature has sunk.
- Conventional structural steels have about 350 ° C their critical temperature. Because of the need expensive fire protection measures for conventional structural steels Having to undertake to a considerable extent is one Inexpensive construction work is not guaranteed and a optimal use of space is often difficult.
- the object of the present invention is now based on an inexpensive method of manufacture to propose steels with which fire protection measures by a critical over the state of the art Temperature can be further reduced and the improved ductility due to a low yield ratio have from 0.4 to 0.65. hereby is supposed to be an inexpensive and modern building design high security against mechanical and thermal Construction failure enabled and in parallel increased resistance to atmospheric corrosion be created.
- the C content in a range of 0.01 to 0.12% and the Mn content in a range from 0.20 to 1.00% be limited.
- This steel becomes slabs in free-standing or continuous casting or shed thin slabs.
- the slabs are made with a Starting temperature in the range from 1000 to 1350 ° C Hot rolled strips. In the case of slab production these are at the hot rolling start temperature heated. On the other hand, if thin slabs are poured, these can be removed from the pouring heat after cooling to the Hot rolling start temperature immediately afterwards the casting process can be further processed by Strips are rolled out.
- the hot rolling final temperature is above 850 ° C, preferred however not higher than 900 ° C.
- the hot rolled strips with thicknesses up to max. 15 mm cool down after the outlet the hot rolling season only in air at a temperature in the range of 720 to 780 ° C coiled, which is particularly good in practice Set results.
- According to an embodiment of the Invention can limit the reel temperature at 760 ° C. After the reel are removed from the tapes Plate removed.
- the sheets thus produced are advantageously in the Temperature range from 880 to 950 ° C, preferably at 920 ° C, normalized for a maximum of 30 minutes.
- the sheets can then also in the temperature range of 400 ° C. tempered up to 700 ° C.
- the inventive method is in the Sheet steel creates a multi-phase structure that predominantly made of ferrite with embedded bainitic / martensitic islands and above also has finely divided carbide deposits. On this structure is based on the high heat resistance and that low yield ratio as a prerequisite for good ductility of the sheets.
- Table 1 lists the chemical compositions of fire-resistant nickel-free steels 1 - 4 in the form of 5 and 10 mm thick sheet metal as well as the final rolling and coiling temperatures observed during the processing of the steels.
- the steels were cast into slabs, which were then heated to 1200 ° C and hot rolled into strip, the in Table 1 given respective final rolling temperatures have been achieved. Starting from the respective The final rolling temperature was the respective strip in air the respective reel temperature given in Table 1 cooled. Then sheets were removed from the strips with a normal annealing at 920 ° C have been subjected to a holding time of less than 30 minutes.
- Table 2 contains the mechanical properties measured on samples of the sheets from the fire-resistant nickel-free steels 1 - 4 of the composition according to Table 1. Characteristic is in particular the significantly higher heat resistance, which is characterized here by the yield strength Re at 600 ° C, which is between 180 and 217 N / mm 2 . This corresponds to a yield point reduction compared to room temperature of more than 3/5. This can raise the critical temperature to over 600 ° C and thus significantly reduce the effort required for additional insulation against heating up the steel in the event of a fire.
- sheets produced according to the invention have an approx. 0.48 to 0.65. 15% lower yield point ratio than conventional steels that have the same high yield point values.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Manufacturing Of Steel Electrode Plates (AREA)
- Chemical Treatment Of Metals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19856265A DE19856265A1 (de) | 1998-12-07 | 1998-12-07 | Verfahren zur Herstellung feuerresistenter Stahlbleche |
| DE19856265 | 1998-12-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1008667A1 EP1008667A1 (de) | 2000-06-14 |
| EP1008667B1 true EP1008667B1 (de) | 2002-07-03 |
Family
ID=7890160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99123536A Expired - Lifetime EP1008667B1 (de) | 1998-12-07 | 1999-11-26 | Verfahren zur Herstellung feuerresistenter Stahlbleche |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1008667B1 (da) |
| AT (1) | ATE220123T1 (da) |
| DE (2) | DE19856265A1 (da) |
| DK (1) | DK1008667T3 (da) |
| ES (1) | ES2178865T3 (da) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2006336816B2 (en) * | 2006-01-26 | 2011-09-15 | Giovanni Arvedi | Strip of hot rolled micro-alloyed steel for obtaining finished pieces by cold pressing and shearing |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4673822B2 (ja) * | 2006-11-14 | 2011-04-20 | 新日本製鐵株式会社 | 溶接継手部の靱性に優れた耐火鋼材及びその製造方法 |
| CN102400055B (zh) * | 2010-09-07 | 2014-03-12 | 鞍钢股份有限公司 | 一种低成本屈强比可控高强度高韧性钢板及其制造方法 |
| CN112522595B (zh) * | 2019-09-19 | 2022-10-21 | 宝山钢铁股份有限公司 | 高强薄规格耐火耐候钢板/钢带及其生产方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4990196A (en) * | 1988-06-13 | 1991-02-05 | Nippon Steel Corporation | Process for manufacturing building construction steel having excellent fire resistance and low yield ratio |
| IT1242132B (it) * | 1990-08-01 | 1994-02-16 | Ilva Spa | Procedimento per la produzione di un acciaio strutturale resistente al fuoco |
| JP2828755B2 (ja) * | 1990-08-29 | 1998-11-25 | 株式会社神戸製鋼所 | 溶接性の優れた低降伏比８０▲ｋｇ▼ｆ／▲ｍｍ▼▲上２▼級鋼板の製造方法 |
| JPH08143954A (ja) * | 1994-11-17 | 1996-06-04 | Kobe Steel Ltd | 耐溶接割れ性の優れた引張強さ７８０Ｎ／ｍｍ２級鋼板の製造方法 |
| DE19724051C1 (de) * | 1997-06-07 | 1999-03-11 | Thyssen Stahl Ag | Grobbleche einer Dicke bis 50 mm aus feuerresistenten nickelfreien Stählen für den Stahlbau und Verfahren zur Herstellung von Grobblech daraus |
| JP3760587B2 (ja) * | 1997-09-16 | 2006-03-29 | Ｊｆｅスチール株式会社 | 耐溶融亜鉛めっき割れ性に優れた耐火電縫溶接角鋼管の 製造方法 |
-
1998
- 1998-12-07 DE DE19856265A patent/DE19856265A1/de not_active Withdrawn
-
1999
- 1999-11-26 AT AT99123536T patent/ATE220123T1/de not_active IP Right Cessation
- 1999-11-26 DE DE59901917T patent/DE59901917D1/de not_active Expired - Lifetime
- 1999-11-26 DK DK99123536T patent/DK1008667T3/da active
- 1999-11-26 EP EP99123536A patent/EP1008667B1/de not_active Expired - Lifetime
- 1999-11-26 ES ES99123536T patent/ES2178865T3/es not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2006336816B2 (en) * | 2006-01-26 | 2011-09-15 | Giovanni Arvedi | Strip of hot rolled micro-alloyed steel for obtaining finished pieces by cold pressing and shearing |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2178865T3 (es) | 2003-01-01 |
| DE59901917D1 (de) | 2002-08-08 |
| DE19856265A1 (de) | 2000-06-15 |
| ATE220123T1 (de) | 2002-07-15 |
| EP1008667A1 (de) | 2000-06-14 |
| DK1008667T3 (da) | 2002-10-14 |
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