WO2023036882A1 - Verfahren zum erzeugen von gehärteten stahlblechbauteilen - Google Patents
Verfahren zum erzeugen von gehärteten stahlblechbauteilen Download PDFInfo
- Publication number
- WO2023036882A1 WO2023036882A1 PCT/EP2022/075019 EP2022075019W WO2023036882A1 WO 2023036882 A1 WO2023036882 A1 WO 2023036882A1 EP 2022075019 W EP2022075019 W EP 2022075019W WO 2023036882 A1 WO2023036882 A1 WO 2023036882A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steel
- component
- contact element
- punctiform
- hardening
- 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.)
- Ceased
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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
-
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- 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
- C22C38/50—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
- C21D2211/001—Austenite
Definitions
- the invention relates to a method for producing hardened sheet steel components.
- press hardening also known as the direct process.
- a sheet steel component is produced by heating a flat blank made of hardenable steel to a temperature above the austenitization temperature, so that the structure of the steel is at least partially in the high-temperature modification, namely austenite.
- This flat blank is then formed into a desired shape in a forming tool, preferably with a single forming stroke, and the heat is withdrawn from the steel material so quickly through contact with the forming tool halves that martensitic hardening occurs, in which the austenite essentially turns into martensite is converted.
- the rate of heat dissipation must be above the so-called critical hardening rate, which is usually above 20 Kelvin per second.
- This press hardening process has been known and introduced for a long time and is used in particular to produce components whose shape would not be so complex that it cannot be produced with a single press stroke.
- a second known method was developed by the applicant, it is the so-called form hardening method, also called indirect method and known from EP1651789B1.
- the hot stamping process makes it possible to create significantly more complex shapes.
- a sheet steel blank is cold-formed in a manner known per se.
- this cold forming takes place in a forming line with, for example, five forming compression presses that transform a flat sheet steel blank step by step into a complex component.
- the component that has been cold-formed in this way is then heated in a continuous furnace to a temperature above the austenitization temperature in order to also achieve a largely or completely austenitic state of the steel structure.
- This already formed and heated steel component is then transferred to a so-called form hardening tool and cooled in the form hardening tool by applying the form hardening tools at a speed above the critical hardening speed and thereby hardened.
- the cold forming is carried out in such a way that a dimensional change due to thermal expansion during austenitization is taken into account by correspondingly smaller forming in all three spatial directions.
- the advantage of the form hardening process is that the usual cold, complete preforming allows for a significantly more complex component shape than with the direct method.
- the hardened sheet steel components can offer protection against corrosion if the plate or strip from which they were produced is formed with a metallic anti-corrosion layer, in particular with a metallic anti-corrosion layer based on zinc or aluminum or their alloys.
- form hardening a component that is completely formed in all three spatial directions, which may have been reduced by the expansion in all three spatial directions, is heated to the austenitizing temperature required for hardening and then placed in the form hardening tool, in which it is possibly with the slightest corrections, in particular corrections of heating-related distortion is pressed on all sides and quench-hardened by the all-round contact of the forming tools.
- goods carriers In order to carry such components through an oven, so-called goods carriers are known, with the goods carriers receiving the component at predetermined points and guiding it through the oven.
- goods carriers are usually made of metal and are carried out with it from the furnace, returned to the furnace entrance, reloaded and fed back through the furnace.
- the goods carriers are complex to manufacture. Since they have to be manufactured specifically for the component, when changing to other components, on the one hand other goods carriers have to be procured and the furnace also has to be converted accordingly. The goods carriers are therefore hardly worthwhile for smaller series.
- contact elements can be any type of funding.
- Contact elements in continuous furnaces can be chains, but plates, walking beams, rollers or the like are also conceivable.
- Storage strips are available for chamber furnaces or multi-layer chamber furnaces.
- the term contact element also includes the named conveying means as well as these storage strips in chamber furnaces.
- the object of the invention is to create a method for producing hardened steel components, in which the components have a better quality and which can also be adapted to different components in a flexible process and can be used cost-effectively and energy-efficiently for all furnace designs used for form hardening and press hardening.
- a bend or deformation is omitted or only partially carried out in the cold forming process, or a further bend or preforming of the component is carried out in such a way that the contact surface on the contact element is reduced and in particular is kept as small as possible.
- this can be a deformation that is only partial.
- the further bending or preforming is carried out in such a way that less than 5%, preferably less than 3% and more preferably less than 1% of the component surface rests on the contact element.
- a switch is made from a planar to a punctiform and/or linear support.
- the components lie on the contact element with their flanges, which are necessary for subsequent further processing and in particular for producing welded joints with other components.
- a punctiform and/or linear support by bending the flanges from their usual position by about 2 - 10°, preferably 3 to 8°, in particular 7° in the direction of the contact element, so that, for example, the Flange edge is bent in relation to its target position by a few millimeters, for example 2.5 mm, in the direction of the contact element.
- This deformation can also occur over the length of the flange edge or other contact areas only over partial areas or partial lengths. This achieves a linear support on the respective points of the contact element, which largely or completely avoids any impairment of the galvanized surface.
- the respective width of the support area can advantageously be adapted to the width of the contact element, in particular the chain conveyor.
- the width of the contact area can be selected to be greater than 30 cm in order to ensure a linear contact on a chain or lifting beam and to avoid a flat contact.
- a transition area can be provided between the sub-areas, which advantageously has a continuous course of bending up to the area without has deformation.
- these main surfaces can also be bent in or out or shaped, which are later shaped back accordingly during the form hardening.
- the advantage of the invention is that chain conveyors or other contact elements can be used flexibly for the component without adversely affecting the components.
- the invention thus relates to a method for producing a hardened steel component, wherein sheet steel blanks are cut from a coil of a hardenable steel alloy or a steel strip and the sheet steel blanks are then formed into a sheet steel component preform in a cold forming process and then the preforms are placed in a continuous furnace on a are heated to the temperature required for hardening above the austenitizing temperature and then pressed in a form-hardening tool and thereby quench-hardened, with the preform being formed with punctiform or linear beads or embossing or flanges resting on the contact element with their free end or partial lengths thereof bent to form the contact element are that they rest with the edge or a partial length of the edge and then during form hardening the beads or bulges or bends that serve as a contact surface ments on or of the flange are pressed or formed into the target geometry of the finished component.
- One embodiment provides for the flanges of the component or the edge areas of the flange to be bent by 2-10°, in particular 3-8° in the direction of the contact element, in particular the chain conveyor, in relation to the target position of the flange in order to produce the linear contact surfaces.
- Bent within the meaning of the invention can also be tilted, folded down or include similar deformations, which means that the bent surface can be flat or even curved.
- One embodiment provides that the flange edges are deflected by 2-7, in particular 2-6 mm in the direction of the contact element, in particular the chain conveyor.
- One embodiment provides for punctiform or linear beads on a surface of the component adjacent to a conveyor to rest on a contact element, in particular chain conveyors, for punctiform or linear beads.
- One embodiment provides that the punctiform or linear beads protrude by 2-7 mm towards the chain conveyor or other contact elements.
- the sheet steel blank used is a blank which is formed with a metallic anti-corrosion layer, in particular with a metallic anti-corrosion layer based on zinc or aluminum or made of zinc or aluminum or their alloys.
- a zinc-based coating can advantageously be used in order to ensure cathodic protection of the steel component against corrosion.
- An advantageous embodiment of the invention provides for the use of transformation-retarded steel grades, in which a hot- or cold-rolled steel strip with a concentration range of the following alloying elements within the limits in percent by weight: carbon up to 0.4, preferably 0.15 to 0.3 Silicon to 1.9, preferably 0.11 to 1.5 manganese to 3.0, preferably 0.8 to 2.5 chromium to 1.5, preferably 0.1 to 0.9 molybdenum to 0.9, preferably 0 .1 to 0.5 nickel up to 0.9,
- Titanium up to 0.2, preferably 0.02 to 0.1
- Aluminum up to 0.2, preferably 0.02 to 0.07
- an alloy-galvanized steel strip made of a hardenable steel alloy in particular a boron-manganese steel such as a 22MnB5 or 20MnB8, is used as the steel strip.
- FIG. 1 The course of the process during form hardening is highly schematic
- FIG. 2 Schematic representation of the contact areas of a preformed component on a chain conveyor without areas bent out according to the invention
- FIG. 3 highly schematized the standing behavior of a preformed component on a chain conveyor with flanges bent out according to the invention
- FIG. 4 an exemplary component according to the invention on a chain conveyor
- FIG. 5 Schematic representation of a component according to the invention with bent-up flange areas for producing a linear support during passage in a lifting step conveyor furnace, in plan view;
- FIG. 6 Schematic representation of a component according to the invention with bent-up flange areas for producing a linear support during passage in a roller hearth furnace, in plan view
- FIG. 7 Schematic representation of a component according to the invention with bent-up flange areas for producing a linear support in a multi-layer chamber furnace, in plan view.
- FIG. 1 shows the form hardening process in a highly schematic manner, in which blanks are first cut off from a steel strip or steel coil, the blanks are then cold-formed and the cold-formed preforms are then austenitized in a furnace. The austenitized preforms are then placed in the form-hardening mold and hardened there, then removed from there and, as a finished molded part, subjected to any necessary surface conditioning.
- FIG. 2 shows the contact surfaces for such components on a chain conveyor, with the preformed component resting here over its entire surface with its flanges.
- FIG. 3 shows a highly schematized embodiment of the invention, in which the flanges are shaped in such a way that the component only rests on the edge areas of the flanges on the chain conveyor, so that full-surface contact and thus efflorescence on the entire surface are avoided. Any efflorescence that may nevertheless occur is not critical at this point, since the edge areas are not relevant, at least with regard to a welded connection.
- FIG. 4 a component is shown in which the flanges are deformed over a partial length in order to achieve a linear contact area along the edge, with partial lengths having the desired shape, e.g. flat and transition areas between the curved and flat areas.
- FIG. 5 shows a plan view of a component according to the invention with a linear support as it passes through a lifting step conveyor.
- the component shown in FIG. 4 essentially corresponds to the sketch in FIG. 5.
- the individual conveyor chains and the lifting beams lying between them can be seen.
- the bent-up flange areas in this example have a length of at least KH, ie the distance between a chain and a lifting beam in this example is approximately 10 cm. In this way, the bearing surface can be reliably reduced and, instead of a flat bearing, only linear bearing of the component can be ensured and this only on the bent-up flange areas.
- Area B describes the length of the bent-up flange area (only marked on the left in FIG. 5).
- a line-like support is made on the outer edges of the flanges on both sides, ie in this component example in four areas. self- Of course, depending on the component geometry, it would also be possible to have fewer line areas (e.g. three lines) or more line areas.
- FIG. 6 shows a top view of a component according to the invention with a linear support as it passes through a roller hearth furnace. Similar to before, areas with upturned flanges are shown again and these are marked with B (left side only). This range can advantageously exceed at least the length from one furnace roll to the next furnace roll (length OR).
- FIG. 7 shows a plan view of a component according to the invention with a linear support in a multi-bearing chamber furnace.
- a continuous furnace is not shown here, but rather a multi-bearing chamber furnace (or single-chamber furnace).
- the area of the bent-up flanges can be selected to be smaller because of the stationary mounting.
- the area for the linear support can be selected up to the minimum width of the storage bar (AL).
- 6 support lines are shown because, depending on the component geometry, it may be advantageous to provide further support lines in the central areas, since this can lead to deflection, for example. However, this is independent of the type of furnace, i.e. this can also be advantageous for continuous furnaces.
- punctiform supports can also be achieved by only bending the edge area of the flange in the direction of the chain conveyor or by applying beads, whether they are punctiform beads or linear beads. According to the invention, all of these minor deformations can be bent into the desired state in the hot state without the risk of microcracks forming in the form-hardening tool.
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- 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)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22783434.8A EP4399337A1 (de) | 2021-09-08 | 2022-09-08 | Verfahren zum erzeugen von gehärteten stahlblechbauteilen |
| US18/008,926 US20240229179A1 (en) | 2021-09-08 | 2022-09-08 | Method For Producing Hardened Steel Sheet Components |
| CN202280005380.0A CN117751201A (zh) | 2021-09-08 | 2022-09-08 | 制造硬质钢板构件的方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021123279.1 | 2021-09-08 | ||
| DE102021123279.1A DE102021123279A1 (de) | 2021-09-08 | 2021-09-08 | Verfahren zum Erzeugen von gehärteten Stahlblechbauteilen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023036882A1 true WO2023036882A1 (de) | 2023-03-16 |
Family
ID=83558307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2022/075019 Ceased WO2023036882A1 (de) | 2021-09-08 | 2022-09-08 | Verfahren zum erzeugen von gehärteten stahlblechbauteilen |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240229179A1 (de) |
| EP (1) | EP4399337A1 (de) |
| CN (1) | CN117751201A (de) |
| DE (1) | DE102021123279A1 (de) |
| WO (1) | WO2023036882A1 (de) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005074468A (ja) * | 2003-08-29 | 2005-03-24 | Toyoda Iron Works Co Ltd | 熱間プレス用めっき鋼板の加熱処理方法 |
| WO2006015849A2 (de) * | 2004-08-09 | 2006-02-16 | Voestalpine Automotive Holding Gmbh | Verfahren zum presshärten von bauteilen aus stahlblech |
| EP1651789B1 (de) | 2003-07-29 | 2010-08-25 | Voestalpine Stahl GmbH | Verfahren zum herstellen von geharteten bauteilen aus stahlblech |
| DE102013100682B3 (de) * | 2013-01-23 | 2014-06-05 | Voestalpine Metal Forming Gmbh | Verfahren zum Erzeugen gehärteter Bauteile und ein Strukturbauteil, welches nach dem Verfahren hergestellt ist |
| WO2021090258A1 (en) * | 2019-11-08 | 2021-05-14 | Voestalpine Automotive Components Cartersville, Inc. | Detection of contamination on steel parts using ultraviolet light |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103547687A (zh) * | 2010-12-24 | 2014-01-29 | 沃斯特阿尔派因钢铁有限责任公司 | 生产硬化的结构部件的方法 |
| DE102019003370A1 (de) * | 2019-05-13 | 2020-11-19 | Rolf Wagner | Zink-Titan beschichtete Blechplatine zur Herstellung eines warmumgeformten und pressgehärteten Stahlblechbauteils sowie Warmumformverfahren |
| CN111672954A (zh) * | 2020-03-18 | 2020-09-18 | 苏州思赛力热能发展有限公司 | 一种板料零部件的间接热成形方法 |
-
2021
- 2021-09-08 DE DE102021123279.1A patent/DE102021123279A1/de active Pending
-
2022
- 2022-09-08 CN CN202280005380.0A patent/CN117751201A/zh active Pending
- 2022-09-08 WO PCT/EP2022/075019 patent/WO2023036882A1/de not_active Ceased
- 2022-09-08 EP EP22783434.8A patent/EP4399337A1/de active Pending
- 2022-09-08 US US18/008,926 patent/US20240229179A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1651789B1 (de) | 2003-07-29 | 2010-08-25 | Voestalpine Stahl GmbH | Verfahren zum herstellen von geharteten bauteilen aus stahlblech |
| JP2005074468A (ja) * | 2003-08-29 | 2005-03-24 | Toyoda Iron Works Co Ltd | 熱間プレス用めっき鋼板の加熱処理方法 |
| WO2006015849A2 (de) * | 2004-08-09 | 2006-02-16 | Voestalpine Automotive Holding Gmbh | Verfahren zum presshärten von bauteilen aus stahlblech |
| DE102013100682B3 (de) * | 2013-01-23 | 2014-06-05 | Voestalpine Metal Forming Gmbh | Verfahren zum Erzeugen gehärteter Bauteile und ein Strukturbauteil, welches nach dem Verfahren hergestellt ist |
| WO2021090258A1 (en) * | 2019-11-08 | 2021-05-14 | Voestalpine Automotive Components Cartersville, Inc. | Detection of contamination on steel parts using ultraviolet light |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117751201A (zh) | 2024-03-22 |
| EP4399337A1 (de) | 2024-07-17 |
| US20240229179A1 (en) | 2024-07-11 |
| DE102021123279A1 (de) | 2023-03-09 |
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