EP0632137B1 - Verfahren zur thermischen Vorbehandlung von metallischem Gut - Google Patents
Verfahren zur thermischen Vorbehandlung von metallischem Gut Download PDFInfo
- Publication number
- EP0632137B1 EP0632137B1 EP94107705A EP94107705A EP0632137B1 EP 0632137 B1 EP0632137 B1 EP 0632137B1 EP 94107705 A EP94107705 A EP 94107705A EP 94107705 A EP94107705 A EP 94107705A EP 0632137 B1 EP0632137 B1 EP 0632137B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- hardening
- press
- presses
- press parts
- 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
- 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
- C21D1/62—Quenching devices
- C21D1/673—Quenching devices for die 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
Definitions
- the invention relates to methods for heat treatment of metallic goods (e.g. easily warped Steel parts such as sheet metal, round blanks and the like Like.) by means of a Roller oven and presses interacting with it (so-called Quetten), at which the good to a predetermined temperature brought and between press parts with predetermined Cooling rate curve is cooled.
- metallic goods e.g. easily warped Steel parts such as sheet metal, round blanks and the like Like.
- the blank is brought to the desired temperature quenched, which requires a quenching medium, namely air, water, salt baths and oil.
- a quenching medium namely air, water, salt baths and oil.
- Quetten It is also known to be subjected to quenching of presses, so-called Quetten. It deals are metal parts, e.g. B. cylinder blocks when it comes to the hardening of saw blade blanks goes. These metal parts press the blank from both sides during the Cooling process. It is in this context too known to cool the press parts or the cylinders, be it with water or oil in order to obtain a cheap, to achieve rapid cooling rate progress.
- the amount of temperature depends on the materials chosen, it is also depending on whether the object to be hardened is now large Dimensions in an extension has a smaller thickness or whether it is more or less compact blanks. The same applies to the temperature.
- the aforementioned Process parameters can be determined by simple tests so that optimal values are achieved.
- the blanks arranged between press parts be, the pressure of the two press parts on each other or is controlled in a time-dependent manner on the blank.
- a High pressure phase is followed by a decrease in pressure so that only the dead weight of the upper press on the blank acts, and it is precisely this pressure drop that leads to this has resulted in the blanks even with unfavorable Dimensioning relationships are treated without delay can.
- the method according to the invention can also be based on blanks such steels can be used, which have also been used to date Air can be hardened. In this context it shows a significantly lower energy expenditure for the couples according to the Invention.
- the process can be used on blanks with a thickness of up to 20 mm be applied and shows in this context its Superiority to known methods, especially in required energy expenditure.
- roller furnaces which can be used according to the invention can be applied to the desired conditions, they are roller ovens known that the temperature range from 850 to 1350 ° C. deal with.
- the structure too corresponds to a tough and good structure.
- the main idea is that Hardening and simultaneous straightening or distortion-free hardening the blanks, as well as recycling from hardening Round materials by inserting them into a mold to the known one Hardening flat products.
- Drills were previously hardened in salt baths. By Environmental protection requirements have to be met by the salt baths in Pass over vacuum ovens. These vacuum furnaces do not guarantee anything distortion-free hardening, and on the other hand, by the lower cooling rate not the very high Hardness value achieved.
- the invention relates in particular to the hardening of Steel workpieces and preferably on distortion-free hardening of flat products, whatever steel they are made of.
- the temperature in the Roller furnace guided so that the The temperature of the goods only slightly decreases and the goods still into the hardening presses above the austenitizing temperature reached.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Description
Claims (3)
- Verfahren zur Wärmebehandlung von sich leicht verziehenden Stahlteilen wie Blech, Ronden und dergleichen mittels eines Rollenofens und mit diesem zusammenwirkenden Pressen (sogenannten Quetten), bei welchem das Gutauf eine vorbestimmte Temperatur T gebracht wird undzwischen Pressteilen mit vorbestimmtem Abkühlungsgeschwindigkeitsverlauf abgekühlt wird,wobei jeder Stahlteil nach Erreichen der vorbestimmten Temperatur T einen Schnellabzugsbereich des Rollenofens auf einer Temperatur T1 > T, wobei T1 ca. 100°C höher als die bisher bei Stahl üblicherweise angestrebten Härtetemperaturen (Austenitisierungstemperatur) liegt, mit einer Geschwindigkeit von 20 bis 40 mm/s oder von 150-300 mm/s durchläuft,wobei die Pressenteile während des Abkühlvorgangs zeitabhängig wechselnde Drücke auf das Stahlteil ausüben dergestalt, daß auf eine Phase hohen Druckes eine Herabsetzung des Druckes erfolgt, in der lediglich das Eigengewicht des oberen Pressenteils auf das Stahlteil wirkt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Pressenteile pulsierend arbeiten.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Pressenteile je nach Material ca. 3 sec. unter Druck stehen, woraufhin eine Periode von 3 sec. folgt, in der die Pressen nur das Eigengewicht auf das metallische Gut ausüben.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4316795 | 1993-05-19 | ||
DE4316795A DE4316795A1 (de) | 1993-05-19 | 1993-05-19 | Verfahren zur thermischen Vorbehandlung von metallischem Gut |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0632137A1 EP0632137A1 (de) | 1995-01-04 |
EP0632137B1 true EP0632137B1 (de) | 1998-10-07 |
Family
ID=6488496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94107705A Expired - Lifetime EP0632137B1 (de) | 1993-05-19 | 1994-05-18 | Verfahren zur thermischen Vorbehandlung von metallischem Gut |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0632137B1 (de) |
AT (1) | ATE171984T1 (de) |
DE (2) | DE4316795A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19525342C1 (de) * | 1995-07-12 | 1997-03-20 | Heimsoth Verwaltungen | Vorrichtung zum Anlassen von metallischem Gut |
US5626693A (en) * | 1995-07-19 | 1997-05-06 | Neturen Co., Ltd. | Method and apparatus for quenching a tubular workpiece |
BE1010419A3 (fr) * | 1996-07-11 | 1998-07-07 | Ti Consult | Procede et dispositif de trempe de produits metalliques plats. |
DE19653610C1 (de) * | 1996-12-20 | 1998-01-15 | Waermetechnik Heimsoth Gmbh & | Vorrichtung zum Härten von metallischem Gut |
JP3007338B1 (ja) | 1998-10-12 | 2000-02-07 | 高周波熱錬株式会社 | 異形棒状部材の拘束焼入れ方法および装置 |
DE102009023195B4 (de) * | 2009-05-29 | 2018-12-20 | Bayerische Motoren Werke Aktiengesellschaft | Herstellung eines partiell pressgehärteten Blechbauteils |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1201860B (de) * | 1958-01-24 | 1965-09-30 | Gleason Works | Verfahren und Vorrichtung zum Haerten eines Tellerzahnrades od. dgl. durch Abschrecken |
SE435527B (sv) * | 1973-11-06 | 1984-10-01 | Plannja Ab | Forfarande for framstellning av en detalj av herdat stal |
US4166521A (en) * | 1976-02-17 | 1979-09-04 | Honda Giken Kogyo Kabushiki Kaisha | Stainless steel brake disc structure |
US4404047A (en) * | 1980-12-10 | 1983-09-13 | Lasalle Steel Company | Process for the improved heat treatment of steels using direct electrical resistance heating |
EP0215032B1 (de) * | 1985-03-27 | 1990-03-07 | Jenny Pressen Ag | Verfahren und anlage zur serienmässigen, verzugsarmen thermomechanischen behandlung von werkstücken sowie anwendung des verfahrens |
EP0632842B1 (de) * | 1992-03-27 | 1995-11-02 | HEIMSOTH VERWALTUNGEN GmbH & CO. KG Beteiligungsgesellschaft | Verfahren zur wärmebehandlung von metallischem gut |
-
1993
- 1993-05-19 DE DE4316795A patent/DE4316795A1/de not_active Withdrawn
-
1994
- 1994-05-18 EP EP94107705A patent/EP0632137B1/de not_active Expired - Lifetime
- 1994-05-18 DE DE59407034T patent/DE59407034D1/de not_active Expired - Lifetime
- 1994-05-18 AT AT94107705T patent/ATE171984T1/de active
Also Published As
Publication number | Publication date |
---|---|
EP0632137A1 (de) | 1995-01-04 |
DE59407034D1 (de) | 1998-11-12 |
DE4316795A1 (de) | 1994-11-24 |
ATE171984T1 (de) | 1998-10-15 |
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