EP2655674A2 - Verfahren zum umformen und härten von beschichteten stahlblechen - Google Patents
Verfahren zum umformen und härten von beschichteten stahlblechenInfo
- Publication number
- EP2655674A2 EP2655674A2 EP11808645.3A EP11808645A EP2655674A2 EP 2655674 A2 EP2655674 A2 EP 2655674A2 EP 11808645 A EP11808645 A EP 11808645A EP 2655674 A2 EP2655674 A2 EP 2655674A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- zinc
- forming
- degree
- forming tool
- 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
- 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
- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, 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
- 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
- C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/26—After-treatment
- C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
- C23C2/29—Cooling or quenching
Definitions
- the invention relates to a method for forming and hardening coated steel sheets with the features of claim 1.
- press-hardened components made of sheet steel are used.
- These press-hardened components made of sheet steel are high-strength components that are used in particular as safety components of the bodywork sector.
- the use of these high-strength steel components makes it possible to reduce the material thickness compared to a normal-strength steel and thus to achieve low body weights.
- a sheet steel plate is heated above the so-called austenitizing temperature and, if appropriate, kept at this temperature until a desired degree of austenitization is achieved. Subsequently, this heated board is transferred to a mold and in this mold in a one-step forming step for formed component and this cooled by the cooled mold simultaneously with a speed that is above the critical hardness speed. Thus, the hardened component is produced.
- the component is first, if necessary, in a multi-stage forming process, the component formed almost completely finished. This formed component is then also heated to a temperature above the Austenitmaschinestempe- temperature and optionally held for a desired time required at this temperature.
- this heated component is transferred to a mold and inserted, which already has the dimensions of the component or the final dimensions of the component, where appropriate, taking into account the thermal expansion of the preformed component.
- the direct method is somewhat simpler to implement, but allows only shapes that are actually to be realized with a single forming step, i. relatively simple profile shapes.
- the indirect process is a bit more complex, but it is also able to realize more complex shapes.
- Zinc-coated steels are currently - with the exception of one component in the Asian region - in the direct process, i. the hot forming not used. Instead, steels with an aluminum-silicon coating are used here.
- a method for hot forming a steel in which a component made of a given boron-manganese steel is heated to a temperature at the Ac 3 point or higher, kept at this temperature and then the heated one Steel sheet is formed into the finished component, wherein the molded component is quenched by cooling from the molding temperature during molding or after molding in such a manner that the cooling rate to MS point at least the critical cooling rate and that the average cooling rate of the molded component from the MS Point at 200 ° C is in the range of 25 ° C / s to 150 ° C / s.
- the object of the invention is to provide a method for forming and hardening of metal-coated steel sheets, in which the contamination of the tools is reduced to the inevitable due to abrasion measure sufficient corrosion protection is achieved and a reliable hardening of the steel sheet is brought about.
- the inventors have recognized that metallic buildup such as Zn buildup on hot forming tools that go beyond the level of unavoidable wear greatly affects productivity in the direct process.
- the reason presumed by the inventors probably lies mainly in evaporating liquid metallic phases, such as Zn phases during hot forming of steels with zinc coating.
- the composition of the steel alloy is adjusted within the usual composition of drilling magnesium steel (22 MnB5) such that a quench hardening by a delayed transformation of austenite into martensite and thus the presence of austenite even at the lower temperature below 800 ° C or lower, so that the moment the steel is formed, no liquid Zinc phases are present, from which zinc could evaporate and precipitate on the tools.
- the desired forming temperature is between 450 ° C and 800 ° C, preferably between 450 ° C and 700 ° C and more preferably between 450 ° C and 600 ° C.
- FIG. 1 shows a highly schematized experimental setup
- Figure 2 schematically the adhesion potential of a metallic coating on the tool using the example of zinc
- FIG. 3 shows images of the tool during three successive forming experiments carried out without intermediate cooling
- FIG. 4 shows images of the tool during three successive forming experiments which were carried out with intermediate cooling according to the invention before forming
- Figure 5 An image showing the tool after the experiments without and with inventive intercooling and the tool in a cleaned initial state.
- a conventional boron manganese steel for use as a press-hardening steel material is adjusted with respect to the transformation of the austenite into other phases so that the transformation shifts into deeper regions.
- steels of general composition are suitable for the invention (all figures in% by mass)
- the alloying elements boron, manganese, carbon and optionally chromium and molybdenum are used as conversion inhibitors in such steels.
- Titanium (Ti) 0, 01-0, 05
- Titanium (Ti) 0, 03-0, 04
- FIG. 1 shows the experimental setup.
- the steel sheet used is a 1.5 mm thick steel sheet of a previously described alloy which is coated with a Z140 layer.
- the oven temperature for heating and austenitizing the sheet is about 910 ° C.
- the oven residence time of the sheets is set so that the sheets reach a temperature of 870 ° C and then held for 45 seconds.
- the sheets were then either placed in the forming tool and formed there, or removed from the oven after heating, fed to an intermediate cooling station and transferred after cooling as quickly as possible in the tool where it formed and quench hardened.
- the intercooling is carried out so that a forming temperature between 450 ° C and 800 ° C, preferably between 450 ° C and 700 ° C and more preferably between 450 ° C and 600 ° C is realized.
- FIG. 2 schematically shows the adhesion potential of a metallic coating on the tool, using the example of zinc. However, it also applies to other metallic coatings. It can be seen at the turning points, the temperature ranges in which convert liquid into solid phases and below which succeeds a transformation with less buildup.
- Figure 3 shows the clearly visible contamination of the tool during a forming without intermediate cooling. Even after three forming steps, the degree of contamination is so high that an impairment of the surface quality of the hardened steel components is foreseeable in the case of continued forming steps.
- the zinc components adhering to the tool by first evaporation and then adhesion and welding can tear out parts of the zinc layer of subsequent components by welding, which adversely affects the corrosion protection.
- zinc constituents adhering to the tool can be transferred in the same way to the steel component, where they disturb the surface quality and the lability of the component.
- FIGS. 4 and 5 show that the tool remains essentially unaffected except for absolutely insignificant and harmless low zinc abrasions in the tool.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Heat Treatment Of Articles (AREA)
- Coating With Molten Metal (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010056264.5A DE102010056264C5 (de) | 2010-12-24 | 2010-12-24 | Verfahren zum Erzeugen gehärteter Bauteile |
| DE102010056265.3A DE102010056265C5 (de) | 2010-12-24 | 2010-12-24 | Verfahren zum Erzeugen gehärteter Bauteile |
| DE102011053941.7A DE102011053941B4 (de) | 2011-09-26 | 2011-09-26 | Verfahren zum Erzeugen gehärteter Bauteile mit Bereichen unterschiedlicher Härte und/oder Duktilität |
| DE102011053939.5A DE102011053939B4 (de) | 2011-09-26 | 2011-09-26 | Verfahren zum Erzeugen gehärteter Bauteile |
| PCT/EP2011/073882 WO2012085248A2 (de) | 2010-12-24 | 2011-12-22 | Verfahren zum umformen und härten von beschichteten stahlblechen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2655674A2 true EP2655674A2 (de) | 2013-10-30 |
| EP2655674B1 EP2655674B1 (de) | 2021-02-03 |
Family
ID=45470542
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11811026.1A Active EP2656187B1 (de) | 2010-12-24 | 2011-12-22 | Verfahren zum erzeugen gehärteter bauteile |
| EP11808211.4A Active EP2655673B1 (de) | 2010-12-24 | 2011-12-22 | Verfahren zum erzeugen gehärteter bauteile |
| EP11808645.3A Active EP2655674B1 (de) | 2010-12-24 | 2011-12-22 | Verfahren zum umformen und härten von beschichteten stahlblechen |
| EP11811025.3A Active EP2655675B1 (de) | 2010-12-24 | 2011-12-22 | Verfahren zum erzeugen gehärteter bauteile |
| EP11807691.8A Active EP2655672B1 (de) | 2010-12-24 | 2011-12-22 | Verfahren zum erzeugen gehärteter bauteile mit bereichen unterschiedlicher härte und/oder duktilität |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11811026.1A Active EP2656187B1 (de) | 2010-12-24 | 2011-12-22 | Verfahren zum erzeugen gehärteter bauteile |
| EP11808211.4A Active EP2655673B1 (de) | 2010-12-24 | 2011-12-22 | Verfahren zum erzeugen gehärteter bauteile |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11811025.3A Active EP2655675B1 (de) | 2010-12-24 | 2011-12-22 | Verfahren zum erzeugen gehärteter bauteile |
| EP11807691.8A Active EP2655672B1 (de) | 2010-12-24 | 2011-12-22 | Verfahren zum erzeugen gehärteter bauteile mit bereichen unterschiedlicher härte und/oder duktilität |
Country Status (8)
| Country | Link |
|---|---|
| US (2) | US10640838B2 (de) |
| EP (5) | EP2656187B1 (de) |
| JP (2) | JP2014507556A (de) |
| KR (3) | KR20130126962A (de) |
| CN (5) | CN103547686B (de) |
| ES (5) | ES2858225T3 (de) |
| HU (5) | HUE052381T2 (de) |
| WO (5) | WO2012085251A2 (de) |
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| JP5808724B2 (ja) * | 2012-10-31 | 2015-11-10 | アイシン高丘株式会社 | アルミニウム合金材のダイクエンチ装置およびダイクエンチ方法 |
| 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 |
| EP3040133B1 (de) * | 2013-08-29 | 2017-03-01 | JFE Steel Corporation | Verfahren zur herstellung eines heisspressgeformten teils und heisspressgeformtes teil |
| DE102013015032A1 (de) * | 2013-09-02 | 2015-03-05 | Salzgitter Flachstahl Gmbh | Zinkbasierte Korrosionsschutzbeschichtung für Stahlbleche zur Herstellung eines Bauteils bei erhöhter Temperatur durch Presshärten |
| CA2924812A1 (en) * | 2013-09-19 | 2015-03-26 | Tata Steel Ijmuiden B.V. | Steel for hot forming |
| JP6167814B2 (ja) * | 2013-09-30 | 2017-07-26 | マツダ株式会社 | 自動変速機 |
| DE102014000969A1 (de) * | 2014-01-27 | 2015-07-30 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Kraftfahrzeugbauteil |
| DE102014101159B4 (de) | 2014-01-30 | 2016-12-01 | Thyssenkrupp Steel Europe Ag | Verfahren zur Oberflächenbehandlung von Werkstücken |
| EP3122486A1 (de) * | 2014-03-28 | 2017-02-01 | Tata Steel IJmuiden BV | Verfahren zur warmverformung eines beschichteten stahlrohlings |
| JP6260411B2 (ja) * | 2014-03-31 | 2018-01-17 | 新日鐵住金株式会社 | 緩冷却鋼材 |
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| WO2016046593A1 (en) | 2014-09-22 | 2016-03-31 | Arcelormittal | Reinforcement element for a vehicle, method for producing the same and door assembly |
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| DE102014114394B3 (de) * | 2014-10-02 | 2015-11-05 | Voestalpine Stahl Gmbh | Verfahren zum Erzeugen eines gehärteten Stahlblechs |
| US20160145731A1 (en) * | 2014-11-26 | 2016-05-26 | GM Global Technology Operations LLC | Controlling Liquid Metal Embrittlement In Galvanized Press-Hardened Components |
| JP6178301B2 (ja) * | 2014-12-12 | 2017-08-09 | Jfeスチール株式会社 | 熱間プレス成形品の製造方法 |
| CN105772584B (zh) * | 2014-12-22 | 2019-01-01 | 上海赛科利汽车模具技术应用有限公司 | 改善零件成型性能的热成型工艺及成型装置 |
| CN104668326B (zh) * | 2015-03-05 | 2016-08-24 | 山东大王金泰集团有限公司 | 一种高强度钢材零部件性能梯度化分布的热冲压方法 |
| EP3067129A1 (de) | 2015-03-09 | 2016-09-14 | Autotech Engineering, A.I.E. | Presssysteme und -verfahren |
| HUE044534T2 (hu) | 2015-03-09 | 2019-10-28 | Autotech Eng Sl | Sajtoló rendszerek és eljárások |
| ES2781198T3 (es) * | 2015-05-29 | 2020-08-31 | Voestalpine Stahl Gmbh | Método para el enfriamiento sin contacto de chapas de acero y dispositivo para ello |
| WO2016193268A1 (de) * | 2015-06-03 | 2016-12-08 | Salzgitter Flachstahl Gmbh | Umformgehärtetes bauteil aus verzinktem stahl, herstellverfahren hierzu und verfahren zur herstellung eines stahlbandes geeignet zur umformhärtung von bauteilen |
| WO2017017485A1 (en) | 2015-07-30 | 2017-02-02 | Arcelormittal | A method for the manufacture of a phosphatable part starting from a steel sheet coated with a metallic coating based on aluminium |
| WO2017017483A1 (en) | 2015-07-30 | 2017-02-02 | Arcelormittal | Steel sheet coated with a metallic coating based on aluminum |
| WO2017017484A1 (en) | 2015-07-30 | 2017-02-02 | Arcelormittal | Method for the manufacture of a hardened part which does not have lme issues |
| DE102016102322B4 (de) * | 2016-02-10 | 2017-10-12 | Voestalpine Metal Forming Gmbh | Verfahren und Vorrichtung zum Erzeugen gehärteter Stahlbauteile |
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| US10619223B2 (en) | 2016-04-28 | 2020-04-14 | GM Global Technology Operations LLC | Zinc-coated hot formed steel component with tailored property |
| US10385415B2 (en) | 2016-04-28 | 2019-08-20 | GM Global Technology Operations LLC | Zinc-coated hot formed high strength steel part with through-thickness gradient microstructure |
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| EP3437750A1 (de) * | 2017-08-02 | 2019-02-06 | Autotech Engineering A.I.E. | Pressverfahren für beschichtete stähle |
| DE102017131253A1 (de) | 2017-12-22 | 2019-06-27 | Voestalpine Stahl Gmbh | Verfahren zum Erzeugen metallischer Bauteile mit angepassten Bauteileigenschaften |
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| CN112534078A (zh) | 2018-06-19 | 2021-03-19 | 通用汽车环球科技运作有限责任公司 | 具有增强的机械性质的低密度压制硬化钢 |
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| KR20250105861A (ko) | 2023-12-29 | 2025-07-09 | 현대제철 주식회사 | 핫 스탬핑용 강판의 제조방법 |
| KR20250105865A (ko) | 2023-12-29 | 2025-07-09 | 현대제철 주식회사 | 핫 스탬핑 부품의 제조방법 |
| KR20250104815A (ko) | 2023-12-29 | 2025-07-08 | 현대제철 주식회사 | 핫 스탬핑용 강판의 제조방법 |
| KR20250105889A (ko) | 2023-12-29 | 2025-07-09 | 현대제철 주식회사 | 핫 스탬핑 부품 및 그 제조방법 |
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| WO2007048883A1 (fr) * | 2005-10-27 | 2007-05-03 | Usinor | Procede de fabrication d'une piece a tres hautes caracteristiques mecaniques a partir d'une tole laminee et revetue |
| JP4733522B2 (ja) * | 2006-01-06 | 2011-07-27 | 新日本製鐵株式会社 | 耐食性、耐疲労性に優れた高強度焼き入れ成形体の製造方法 |
| JP4681492B2 (ja) | 2006-04-07 | 2011-05-11 | 新日本製鐵株式会社 | 鋼板熱間プレス方法及びプレス成形品 |
| DE102007013739B3 (de) * | 2007-03-22 | 2008-09-04 | Voestalpine Stahl Gmbh | Verfahren zum flexiblen Walzen von beschichteten Stahlbändern |
| JP5194986B2 (ja) * | 2007-04-20 | 2013-05-08 | 新日鐵住金株式会社 | 高強度部品の製造方法および高強度部品 |
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| PL2159292T3 (pl) * | 2007-06-15 | 2018-11-30 | Nippon Steel & Sumitomo Metal Corporation | Sposób wytwarzania kształtowanego wyrobu |
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| 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 |
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| DE102009017326A1 (de) * | 2009-04-16 | 2010-10-21 | Benteler Automobiltechnik Gmbh | Verfahren zur Herstellung von pressgehärteten Bauteilen |
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| KR101171450B1 (ko) * | 2009-12-29 | 2012-08-06 | 주식회사 포스코 | 도금 강재의 열간 프레스 성형방법 및 이를 이용한 열간 프레스 성형품 |
| JP5740099B2 (ja) * | 2010-04-23 | 2015-06-24 | 東プレ株式会社 | 熱間プレス製品の製造方法 |
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2011
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