EP2864505A1 - Verfahren zum presshärten von stahl - Google Patents
Verfahren zum presshärten von stahlInfo
- Publication number
- EP2864505A1 EP2864505A1 EP13732131.1A EP13732131A EP2864505A1 EP 2864505 A1 EP2864505 A1 EP 2864505A1 EP 13732131 A EP13732131 A EP 13732131A EP 2864505 A1 EP2864505 A1 EP 2864505A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- hardening
- steel
- cooling rate
- phk
- 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.)
- Granted
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
- C21D11/00—Process control or regulation for heat treatments
- C21D11/005—Process control or regulation for heat treatments for 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D11/00—Process control or regulation for heat treatments
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
-
- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
-
- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Definitions
- the invention relates to a method for press hardening steel according to the preamble of claim 1.
- Press hardening of steel is a technique known since the 1970's.
- Ver go ⁇ is increased on with a suitable press hardening alloy composition to a temperature a steel board that specifically preferably enables Austenitization a complete austenitization.
- a full austenitization is usually carried out above the sogenann ⁇ th AC 3 point location which can be read to stand diagrams from corresponding Mehrstoffzu- and which in particular also depends on the composition.
- Such a steel is cooled after heating and complete austenitizing at a speed which is above the so-called critical hardening speed. This results in a fully martensitic structure which the steel has a high hardness, in particular up to 1500 MPa and above ver lends ⁇ .
- the strength of such a press-hardened steel is essentially determined by the carbon content, since this determines the martensite hardness.
- alloying elements in the composition determine the curability substantially with the carbon to which GeWiS ⁇ se elements, including in particular boron affect the Umwandlungsverhal ⁇ th, and in particular as so-called conversion act retarders. These transient retarders reduce the temperature below which they also cool down above the critical temperature. see curing speed not fully martensitic microstructure more could be achieved, significantly and can therefore teilwei ⁇ se be used to influence certain process parameters favorable.
- the usual procedure for press hardening is in this case to provide the entspre ⁇ sponding press hardening steel as a metal sheet, cut from this sheet, a board, and either deep-draw this board in a cold state and then heat to insert into a tool and correspondingly cool there by all sides concerns the cooling tool or the To heat board and ⁇ warm in a tool and simultaneously cool at the appropriate speed.
- the cooling rates are determined by the tool or the contact of the press-hardening steel with the tool.
- the object of the invention is to provide a method for press hardening of steels, which facilitates the process control during press hardening, improves and makes more comprehensible.
- certain plant parameters can be predetermined for an existing desired steel and, in particular, the cooling rate in the tool.
- system parameters can also be taken into account, depending on the degree of deformation, with the given parameters and their ranges. Basically, high degrees of deformation result in reduced martensite being formed. So in order to achieve a desired martensite content, it can be estimated whether the given hardness is reached at a given degree of deformation.
- the Committee can be lowered.
- a press hardness number is created for this purpose.
- the compression hardness number (PHZ) is a tool which can be estimated from the chemical composition and the cooling rate in the tool simply whether the desired fully martensitic Ge ⁇ paste can be achieved.
- Vollmartensiticians structure in the sense of this disclosure corresponds to a structural proportion of
- the invention is exemplified with reference to a drawing erläu ⁇ tert. It shows:
- Figure 1 a table with several steel compositions from which the respective Presshärteiere results;
- P, S, N are just as usual unavoidable Verunreini ⁇ conditions contained .V and Ti are not explicitly listed in the table and are in the range of ⁇ 0.5%, especially alloyed to ⁇ 0.2%.
- the theoretical press-hardening cooling rates may deviate from the measured press-hardening cooling rates, since certain safety factors, for example to compensate for the measurement uncertainties, have been incorporated and meaningful generalization has been undertaken .
- PHZ press hardness number
- PHZ> 1 a board can be deformed warm or rising
- the number of press hardness values can be seen against the critical logarithmic degree of deformation.
- the hatched area below the straight line from the press hardness number 1 indicates the area in which safe hot forming should be possible.
- the dashed curves around the straight line indicate possible curves, since this increase does not necessarily have to be linear.
- the theoretical press cooling rate (PHC) must be determined according to the formula and the cooling rate (PHW) achievable in continuous operation must be determined for the respective forming tool.
- the Presshärteiere be set and then be determined in a ⁇ way by the conversion of the above formula, the effective cooling rate.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012105580A DE102012105580B3 (de) | 2012-06-26 | 2012-06-26 | Verfahren zum Presshärten von Stahl |
| PCT/EP2013/063282 WO2014001336A1 (de) | 2012-06-26 | 2013-06-25 | Verfahren zum presshärten von stahl |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2864505A1 true EP2864505A1 (de) | 2015-04-29 |
| EP2864505B1 EP2864505B1 (de) | 2020-05-06 |
Family
ID=48051538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13732131.1A Active EP2864505B1 (de) | 2012-06-26 | 2013-06-25 | Verfahren zum presshärten von stahl |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9982319B2 (de) |
| EP (1) | EP2864505B1 (de) |
| CN (1) | CN104487599B (de) |
| DE (1) | DE102012105580B3 (de) |
| ES (1) | ES2791713T3 (de) |
| WO (1) | WO2014001336A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013110761B4 (de) | 2013-09-27 | 2016-08-11 | Voit Tph Gmbh | Verfahren zum Herstellen eines metallischen Verbundbauteils und metallisches Verbundbauteil |
| KR20190065351A (ko) * | 2016-10-03 | 2019-06-11 | 에이케이 스틸 프로퍼티즈 인코포레이티드 | 고 연신의 프레스 경화 강 및 그 제조 |
| DE102021110702A1 (de) | 2021-04-27 | 2022-10-27 | Voestalpine Metal Forming Gmbh | Verfahren und Vorrichtung zum Herstellen gehärteter Stahlbauteile mit unterschiedlich duktilen Bereichen |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2367962B2 (de) * | 2008-12-19 | 2018-07-18 | voestalpine Metal Forming GmbH | Verfahren zum herstellen partiell gehärteter bauteile aus stahlblech |
| JP4825882B2 (ja) * | 2009-02-03 | 2011-11-30 | トヨタ自動車株式会社 | 高強度焼き入れ成形体及びその製造方法 |
| DE102009030489A1 (de) | 2009-06-24 | 2010-12-30 | Thyssenkrupp Nirosta Gmbh | Verfahren zum Herstellen eines warmpressgehärteten Bauteils, Verwendung eines Stahlprodukts für die Herstellung eines warmpressgehärteten Bauteils und warmpressgehärtetes Bauteil |
| DE102010048209C5 (de) * | 2010-10-15 | 2016-05-25 | Benteler Automobiltechnik Gmbh | Verfahren zur Herstellung eines warmumgeformten pressgehärteten Metallbauteils |
-
2012
- 2012-06-26 DE DE102012105580A patent/DE102012105580B3/de not_active Expired - Fee Related
-
2013
- 2013-06-25 US US14/408,712 patent/US9982319B2/en active Active
- 2013-06-25 CN CN201380033524.4A patent/CN104487599B/zh active Active
- 2013-06-25 EP EP13732131.1A patent/EP2864505B1/de active Active
- 2013-06-25 ES ES13732131T patent/ES2791713T3/es active Active
- 2013-06-25 WO PCT/EP2013/063282 patent/WO2014001336A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014001336A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104487599B (zh) | 2016-08-31 |
| ES2791713T3 (es) | 2020-11-05 |
| EP2864505B1 (de) | 2020-05-06 |
| DE102012105580B3 (de) | 2013-04-25 |
| CN104487599A (zh) | 2015-04-01 |
| WO2014001336A1 (de) | 2014-01-03 |
| US9982319B2 (en) | 2018-05-29 |
| US20150152517A1 (en) | 2015-06-04 |
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