EP1111075A1 - Procédé pour le traitement thermique de fil - Google Patents
Procédé pour le traitement thermique de fil Download PDFInfo
- Publication number
- EP1111075A1 EP1111075A1 EP00126743A EP00126743A EP1111075A1 EP 1111075 A1 EP1111075 A1 EP 1111075A1 EP 00126743 A EP00126743 A EP 00126743A EP 00126743 A EP00126743 A EP 00126743A EP 1111075 A1 EP1111075 A1 EP 1111075A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rolling
- cooling
- winding
- rolling stock
- temperature
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 41
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 27
- 238000005496 tempering Methods 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims description 37
- 238000004804 winding Methods 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 229910001566 austenite Inorganic materials 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 5
- 238000005554 pickling Methods 0.000 claims description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000001953 recrystallisation Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 229910001149 41xx steel Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 238000010791 quenching Methods 0.000 description 6
- 230000000171 quenching effect Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
-
- 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
- C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
Definitions
- the invention relates to a method for the heat treatment of wire, wherein the Rolled material rolled into coils or coiled or by means of a winding device in Winding shape is brought.
- the invention relates to a system for Execution of the procedure.
- EP 0 849 369 A2 discloses a method for the heat treatment of wire or bar steel, in which the rolling stock coming from the rolling heat is coiled in a basket or deposited in turns on a conveyor belt by means of a winding layer and at the end of this conveying means via a mandrel to one Bund is collected, whereby in order to avoid fluctuations in cooling in the reel or as a winding and associated inhomogeneous mechanical properties, it is proposed to lead the cooling from the rolling heat to the conversion area, which is caused by the Ar 3 or Ar 1 line is marked. This cooling is controlled in such a way that the surface of the rolling stock is not supercooled and thus reaches the area of martensite formation in order to avoid undesirable hard spots on the rolling stock surface. According to the process known from EP 0 849 369 A2, the rolling stock from the austenite phase is to be converted almost isothermally into the ferrite / pearlite phase.
- the invention has for its object a method for heat treatment of wire and a system for performing the method of the generic type Provide ways to further develop known processes and systems, the wire is tempered before further processing to the end product and overall an uneven structure over the length of the roll and thus uneven mechanical properties can be avoided.
- the invention is based on the idea that to temper the wire already the still long format, i.e. not yet wound, rolling stock directly from the Rolling heat coming cooled to a temperature below the martensite start temperature becomes.
- the martensite start temperature is the temperature at which the martensite transformation starts. It is due to increasing carbon contents and alloy additives noticeably influenced and is therefore from the special alloy composition dependent. Only after the quenching step is discouraged the rolling stock is then coiled, wound or laid in turns. Subsequently the tempering process takes place.
- a remuneration process is known to consist of three sub-steps, austenitizing a material, i.e. the warming up and warming up of the Workpiece and homogenization of the structure, quenching for adjustment a hardness structure as well as tempering to improve the toughness properties.
- austenitizing a material i.e. the warming up and warming up of the Workpiece and homogenization of the structure
- quenching for adjustment a hardness structure as well as tempering to improve the toughness properties.
- austenitizing because the wire is cooled directly from the rolling heat. It has been recognized that it is it is also possible to lay the wire in turns, even when hardened and then start.
- the effect is preferably exploited that that in the cooling in the surface layer of the long-format rolled material formed by the residual heat is already started in the core.
- the remaining austenite changes later in the federal government to martensite.
- the beneficial properties, in particular the reduced risk of cracking, the less stressed hardness structure has already been pointed out.
- the cooling to a temperature below the martensite start temperature - i.e. quenching - after the finish stitch in the roll stand and before static recrystallization of the roll structure begins.
- the resultant during the rolling process and during cooling also quenched secondary scale by cracking at Winding or winding already mechanically before a subsequent one Pickling process is removed.
- the problem of scale formation in the federal government is eliminated as the material is cooled to temperatures ⁇ 400 ° C during the quenching process becomes. No scale forms at these temperatures. This eliminates the Disadvantage described above that when pickling for safe descaling inner turns for pickling the outer turns.
- edge decarburization of the wire material is avoided, which at a reheating to austenitizing temperature and thus the necessary high Oven temperatures occur and have a negative impact on the end product.
- the method proposed according to the invention also has an environmentally friendly method Aspects on. Steels for cold massive forming - alloyed with boron usually isothermally converted to a cold formable in a salt bath To create structures. In addition to occurring fluctuations in strength the wire length is very harmful to the environment in the salt bath.
- proposed method can be dispensed with the salt bath treatment because the steel grades coming from the rolling heat are below the martensite start temperature be cooled and then converted into a bunch.
- a system for implementing the method is proposed with a Roll stand and downstream device for reeling the rolling stock or device for laying turns next to conveyor device for the turns and collecting station to form a bundle by means of a mandrel and a cooling section, which is immediately downstream of the roll stand online for defined cooling of the long-sized rolling stock below the martensite start temperature, and one Tempering furnace, which is arranged downstream of the reel device or winding laying device is.
- This tempering furnace can because of the fine-grained structure and the residual heat in the bundle is considerably shorter than that of the conventional ones Compensation process required.
- the method according to the invention is preferably used for heat treatment the 50 Cr V4 and temperable steels with pre-eutectoid carbide precipitation, like 90 MnCr V8 or X 36 CrMo 17, or boron-containing steels with subsequent Cold forming for springs, screws, molded parts etc.
- pre-eutectoid carbide precipitation like 90 MnCr V8 or X 36 CrMo 17, or boron-containing steels with subsequent Cold forming for springs, screws, molded parts etc.
- Boron-containing steels for cold massive forming can now be obtained from the rolling heat be compensated. They show after cold forming without additional tempering the desired strength.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatment Of Steel (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19962801A DE19962801A1 (de) | 1999-12-23 | 1999-12-23 | Verfahren zum Wärmebehandeln von Draht |
| DE19962801 | 1999-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1111075A1 true EP1111075A1 (fr) | 2001-06-27 |
Family
ID=7934343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00126743A Withdrawn EP1111075A1 (fr) | 1999-12-23 | 2000-12-06 | Procédé pour le traitement thermique de fil |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6682612B2 (fr) |
| EP (1) | EP1111075A1 (fr) |
| JP (1) | JP2001220624A (fr) |
| KR (1) | KR20010062528A (fr) |
| CN (1) | CN1300648A (fr) |
| CZ (1) | CZ20004844A3 (fr) |
| DE (1) | DE19962801A1 (fr) |
| MX (1) | MXPA00012712A (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7055244B2 (en) * | 2002-03-14 | 2006-06-06 | Anand Waman Bhagwat | Method of manufacturing flat wire coil springs to improve fatigue life and avoid blue brittleness |
| DE102004048443B3 (de) * | 2004-10-02 | 2005-12-01 | C.D. Wälzholz-Brockhaus GmbH | Verfahren zur walztechnischen Verformung von draht- und stabförmigem Vormaterial, Vorrichtung zur Durchführung des Verfahrens sowie nach dem Verfahren hergestelltes Flachprofil |
| CN104511477A (zh) * | 2013-09-27 | 2015-04-15 | 贝卡尔特公司 | 热机械工艺 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1508443A1 (de) * | 1966-05-07 | 1969-10-23 | Schloemann Ag | Vorrichtung zur Herstellung von patentiertem Stahldraht aus der Walzhitze |
| DE2345738B1 (de) * | 1973-09-11 | 1974-07-11 | Salzgitter Peine Stahlwerke | Stahldraht und Verfahren zu seiner Herstellung |
| BE840896A (fr) * | 1976-04-16 | 1976-10-18 | Centre Rech Metallurgique | Procede de fabrication des produits en acier lamines |
| DE2612918A1 (de) * | 1975-04-02 | 1976-10-21 | Florin Stahl Walzwerk | Verfahren zur herstellung von walzstahlerzeugnissen mit entfestigter randzone und hochfestem kern |
| FR2445858A1 (fr) * | 1979-01-05 | 1980-08-01 | Salzgitter Peine Stahlwerke | Acier a beton soudable et procede d'obtention de cet acier |
| JPS56119728A (en) * | 1980-02-25 | 1981-09-19 | Sumitomo Metal Ind Ltd | Manufacture of high tensile wire rod |
| DE3427557A1 (de) * | 1983-09-09 | 1985-03-28 | VEB Stahl- und Walzwerk "Wilhelm Florin", DDR 1422 Hennigsdorf | Verfahren zur herstellung hochfester normteile aus kaltstauchstahl |
| EP0496726A2 (fr) * | 1991-01-25 | 1992-07-29 | EVG Entwicklungs- u. Verwertungs- Gesellschaft m.b.H. | Procédé et installation pour la fabrication en continue de fil enroulé en bobines |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4180418A (en) * | 1973-09-11 | 1979-12-25 | Stahlwerke Peine-Salzgitter A.G. | Method of making a steel wire adapted for cold drawing |
| DE2830153C2 (de) | 1978-07-08 | 1984-02-09 | ARBED Saarstahl GmbH, 6620 Völklingen | Verfahren und Vorrichtung zum Wärmebehandeln von zu Ringen gehaspeltem Draht oder Band |
| JPS57126913A (en) * | 1981-01-27 | 1982-08-06 | Kobe Steel Ltd | Production of high-toughness high-strength wire or rod steel |
| JPH04311529A (ja) * | 1991-04-10 | 1992-11-04 | Sugita Seisen Kojo:Kk | 高強度高靱性ばね用オイルテンパー鋼線の連続熱処理方法 |
| DE19653062A1 (de) | 1996-12-19 | 1998-06-25 | Schloemann Siemag Ag | Ferritisches Wickeln von Draht bzw. Stabstahl |
-
1999
- 1999-12-23 DE DE19962801A patent/DE19962801A1/de not_active Withdrawn
-
2000
- 2000-12-06 EP EP00126743A patent/EP1111075A1/fr not_active Withdrawn
- 2000-12-18 MX MXPA00012712A patent/MXPA00012712A/es unknown
- 2000-12-20 US US09/752,137 patent/US6682612B2/en not_active Expired - Fee Related
- 2000-12-20 KR KR1020000078939A patent/KR20010062528A/ko not_active Application Discontinuation
- 2000-12-21 JP JP2000389317A patent/JP2001220624A/ja not_active Withdrawn
- 2000-12-21 CZ CZ20004844A patent/CZ20004844A3/cs unknown
- 2000-12-22 CN CN00136437A patent/CN1300648A/zh active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1508443A1 (de) * | 1966-05-07 | 1969-10-23 | Schloemann Ag | Vorrichtung zur Herstellung von patentiertem Stahldraht aus der Walzhitze |
| DE2345738B1 (de) * | 1973-09-11 | 1974-07-11 | Salzgitter Peine Stahlwerke | Stahldraht und Verfahren zu seiner Herstellung |
| DE2612918A1 (de) * | 1975-04-02 | 1976-10-21 | Florin Stahl Walzwerk | Verfahren zur herstellung von walzstahlerzeugnissen mit entfestigter randzone und hochfestem kern |
| BE840896A (fr) * | 1976-04-16 | 1976-10-18 | Centre Rech Metallurgique | Procede de fabrication des produits en acier lamines |
| FR2445858A1 (fr) * | 1979-01-05 | 1980-08-01 | Salzgitter Peine Stahlwerke | Acier a beton soudable et procede d'obtention de cet acier |
| JPS56119728A (en) * | 1980-02-25 | 1981-09-19 | Sumitomo Metal Ind Ltd | Manufacture of high tensile wire rod |
| DE3427557A1 (de) * | 1983-09-09 | 1985-03-28 | VEB Stahl- und Walzwerk "Wilhelm Florin", DDR 1422 Hennigsdorf | Verfahren zur herstellung hochfester normteile aus kaltstauchstahl |
| EP0496726A2 (fr) * | 1991-01-25 | 1992-07-29 | EVG Entwicklungs- u. Verwertungs- Gesellschaft m.b.H. | Procédé et installation pour la fabrication en continue de fil enroulé en bobines |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 005, no. 195 (C - 083) 11 December 1981 (1981-12-11) * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20010011566A1 (en) | 2001-08-09 |
| US6682612B2 (en) | 2004-01-27 |
| KR20010062528A (ko) | 2001-07-07 |
| MXPA00012712A (es) | 2003-06-24 |
| CN1300648A (zh) | 2001-06-27 |
| CZ20004844A3 (cs) | 2001-08-15 |
| JP2001220624A (ja) | 2001-08-14 |
| DE19962801A1 (de) | 2001-06-28 |
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Legal Events
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| AKX | Designation fees paid |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
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