EP1050591A3 - Thermal treatment process for manufacturing surface hardened unalloyed or low alloyed, elongated or flat steel products - Google Patents
Thermal treatment process for manufacturing surface hardened unalloyed or low alloyed, elongated or flat steel products Download PDFInfo
- Publication number
- EP1050591A3 EP1050591A3 EP00108714A EP00108714A EP1050591A3 EP 1050591 A3 EP1050591 A3 EP 1050591A3 EP 00108714 A EP00108714 A EP 00108714A EP 00108714 A EP00108714 A EP 00108714A EP 1050591 A3 EP1050591 A3 EP 1050591A3
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- unalloyed
- elongated
- workpiece
- treatment process
- 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- Withdrawn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
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
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
-
- 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
-
- 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
- C21D2221/00—Treating localised areas of an article
- C21D2221/10—Differential treatment of inner with respect to outer regions, e.g. core and periphery, respectively
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S148/00—Metal treatment
- Y10S148/902—Metal treatment having portions of differing metallurgical properties or characteristics
Abstract
Um Wärmebehandlungsverfahren zur Herstellung randschichtgehärteter Lang- oder Flachprodukte, umfassend die Schritte Abkühlen des Werkstücks auf eine Temperatur unterhalb der Martensitstarttemperatur und nachfolgendem langsamen Abkühlen des Kerns dahingehend zu verbessern, daß die Zähigkeitseigenschaften des Werkstücks verbessert werden, wird erfindungsgemäß vorgeschlagen, daß der erste Abkühlprozeß in mehreren, sich wiederholenden Schritten durchgeführt wird, wobei sich jeder Prozeßschritt aus einem Abkühlen auf eine Temperatur unterhalb der Martensitstarttemperatur zur martensitischen Umwandlung nur jeweils eines Teils des Werkstückrandbereichs und einer sich anschließenden zeitlichen Phase zur Entspannung der bereits gebildeten martensitischen Gefügteteile und/oder Randbereiche Martensit/Austenit zusammensetzt. In order to improve heat treatment processes for the production of surface-hardened long or flat products, comprising the steps of cooling the workpiece to a temperature below the martensite start temperature and then slowly cooling the core in such a way that the toughness properties of the workpiece are improved, it is proposed according to the invention that the first cooling process in several , repetitive steps is carried out, each process step consisting of cooling to a temperature below the martensite start temperature for martensitic transformation of only a part of the workpiece edge area and a subsequent time phase for relaxation of the martensitic structural parts and / or edge areas already formed martensite / austenite ,
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19921286 | 1999-05-07 | ||
DE19921286A DE19921286A1 (en) | 1999-05-07 | 1999-05-07 | Heat treatment process for the production of surface-hardened long and flat products from unalloyed or low-alloy steels |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1050591A2 EP1050591A2 (en) | 2000-11-08 |
EP1050591A3 true EP1050591A3 (en) | 2004-06-23 |
Family
ID=7907440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00108714A Withdrawn EP1050591A3 (en) | 1999-05-07 | 2000-04-22 | Thermal treatment process for manufacturing surface hardened unalloyed or low alloyed, elongated or flat steel products |
Country Status (4)
Country | Link |
---|---|
US (1) | US6355119B1 (en) |
EP (1) | EP1050591A3 (en) |
JP (1) | JP2000328141A (en) |
DE (1) | DE19921286A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9132567B2 (en) * | 2007-03-23 | 2015-09-15 | Dayton Progress Corporation | Tools with a thermo-mechanically modified working region and methods of forming such tools |
US8968495B2 (en) * | 2007-03-23 | 2015-03-03 | Dayton Progress Corporation | Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels |
WO2009102848A1 (en) * | 2008-02-15 | 2009-08-20 | Dayton Progress Corporation | Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels |
US8518195B2 (en) * | 2012-01-20 | 2013-08-27 | GM Global Technology Operations LLC | Heat treatment for producing steel sheet with high strength and ductility |
CN106756504B (en) * | 2016-12-28 | 2018-05-15 | 鞍钢集团(鞍山)铁路运输设备制造有限公司 | A kind of ball grinding machine lining board and preparation method thereof |
CN107480328B (en) * | 2017-07-04 | 2022-09-20 | 山东建筑大学 | Carbon distribution theory calculation method based on Q & P process |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1351423A (en) * | 1971-04-14 | 1974-05-01 | Koninklijke Hoogovens En Staal | Manufacture of profiled rod |
US4016009A (en) * | 1975-01-29 | 1977-04-05 | Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie | Producing rolled steel products |
DE2916218A1 (en) * | 1979-04-21 | 1980-10-23 | Florin Stahl Walzwerk | Rolled steel prods. with multilayer microstructure - where prod. leaving hot rolling mill is quenched intermittently to obtain several layers of tempered martensite |
GB2087927A (en) * | 1980-10-16 | 1982-06-03 | Arbed | Manufacture of rolled steel products having good weldability, a high elastic limit, and toughness at very low temperatures |
US4877463A (en) * | 1984-08-23 | 1989-10-31 | Dyckerhoff & Widmann Aktiengesellschaft | Method for producing rolled steel products, particularly threaded steel tension members |
Family Cites Families (1)
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 |
-
1999
- 1999-05-07 DE DE19921286A patent/DE19921286A1/en not_active Withdrawn
-
2000
- 2000-04-22 EP EP00108714A patent/EP1050591A3/en not_active Withdrawn
- 2000-05-02 JP JP2000133603A patent/JP2000328141A/en not_active Withdrawn
- 2000-05-05 US US09/566,206 patent/US6355119B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1351423A (en) * | 1971-04-14 | 1974-05-01 | Koninklijke Hoogovens En Staal | Manufacture of profiled rod |
US4016009A (en) * | 1975-01-29 | 1977-04-05 | Centre De Recherches Metallurgiques-Centrum Voor Research In De Metallurgie | Producing rolled steel products |
DE2916218A1 (en) * | 1979-04-21 | 1980-10-23 | Florin Stahl Walzwerk | Rolled steel prods. with multilayer microstructure - where prod. leaving hot rolling mill is quenched intermittently to obtain several layers of tempered martensite |
GB2087927A (en) * | 1980-10-16 | 1982-06-03 | Arbed | Manufacture of rolled steel products having good weldability, a high elastic limit, and toughness at very low temperatures |
US4877463A (en) * | 1984-08-23 | 1989-10-31 | Dyckerhoff & Widmann Aktiengesellschaft | Method for producing rolled steel products, particularly threaded steel tension members |
Also Published As
Publication number | Publication date |
---|---|
US6355119B1 (en) | 2002-03-12 |
DE19921286A1 (en) | 2000-11-09 |
JP2000328141A (en) | 2000-11-28 |
EP1050591A2 (en) | 2000-11-08 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: 7C 21D 1/02 - Ipc: 7C 21D 1/78 B Ipc: 7C 21D 8/08 B Ipc: 7C 21D 1/06 B Ipc: 7C 21D 1/19 A |
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STAA | Information on the status of an ep patent application or granted ep patent |
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18D | Application deemed to be withdrawn |
Effective date: 20041224 |