JP6211908B2 - ホットスタンプ成形品の製造方法 - Google Patents
ホットスタンプ成形品の製造方法 Download PDFInfo
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- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/68—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous solutions with pH between 6 and 8
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- C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
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- 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
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
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- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
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- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
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- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
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- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
- C25D5/50—After-treatment of electroplated surfaces by heat-treatment
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- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
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- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
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- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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Description
図1は、本発明の実施形態に係るホットスタンプ成形品の製造方法を説明するための図であり、(a)は亜鉛メッキ鋼板である素材を準備する工程、(b)はシート材に亜鉛メッキ鋼板をカットする工程、(c)は亜鉛メッキ鋼板を加熱する工程、(d)は成形工程、(e)は酸化皮膜除去工程、(f)は塗装処理工程を示した図である。
<ホットスタンプ成形>
亜鉛メッキ鋼板として、22MnB5鋼に合金化溶融亜鉛メッキを表層に形成した鋼板(めっき目付量50g/m2)を準備した。なお、ここでは、JIS H 401に記載の付着量試験法で得た溶液をICPにて分析し、Zn重量を測定し、Znが30g/m2であることを確認した。この亜鉛メッキ鋼板を加熱温度900℃で10秒保持し、成形・焼入れ温度700℃以下(具体的には金型温度20℃)で焼入れを行った。
図3は、実施例1に係るホットスタンプ後(加熱後)の亜鉛メッキ鋼板の断面写真であり、図3に示すように、亜鉛メッキ層(亜鉛鉄合金層)の表面には酸化皮膜(20μm以下)が形成されていた。この酸化皮膜と亜鉛メッキ層との間には空隙が形成されていた。なお、亜鉛メッキ層の下層には鉄−亜鉛固溶層が形成されている。次に、酸化皮膜が形成された亜鉛メッキ鋼板の表面に表2に示すように350MW/cm2の条件でレーザーを照射し、酸化皮膜を除去した。
酸化皮膜が除去された亜鉛メッキ鋼板の亜鉛メッキ層の表面に、リン酸化成処理を実施し、リン酸塩化成処理皮膜の付着重量を測定した。なお、皮膜の付着量の測定を、JSI K 0119に準拠した蛍光X線分光分析法により実施した。この結果を表2に示す。
得られたリン酸塩化成処理皮膜が付着した亜鉛メッキ鋼板にカチオン電着塗装(厚さ10μm狙い)した試験片を作製し、温塩水浸漬試験機を用いて、40℃以上の温水に塩濃度0.1%以上にして、200時間以上浸漬した後、粘着テープにより、塗膜の密着性を評価した。この結果を表2に示す。ここで、表2に示す剥離面積率は、塗膜の剥離が発生した面積を試験片の面積で除算したものである。
実施例1と同じように、ホットスタンプ成形品に相当する亜鉛メッキ鋼板を作製した後、その表面にリン酸化成処理を施し、その上に塗膜を被覆して試験片とし、この試験片の塗膜の剥離試験を行った。実施例1と相違する点は、表2に示すように、レーザーの照射強度である。実施例1と同様に、塗装前のリン酸塩化成処理皮膜の付着量を測定し、さらに塗装後の剥離面積を測定した。この結果を表2に示す。
実施例1と同じように、ホットスタンプ成形品に相当する亜鉛メッキ鋼板を作製した後、その表面にリン酸化成処理を施し、その上に塗膜を被覆して試験片とし、この試験片の塗膜の剥離試験を行った。実施例1と相違する点は、レーザーにより酸化皮膜を除去していない点である。実施例1と同様に、塗装前のリン酸塩化成処理皮膜の付着量を測定し、さらに塗装後の剥離面積を測定した。この結果を表2に示す。
実施例1と同じように、ホットスタンプ成形品に相当する亜鉛メッキ鋼板を作製した後、その表面にリン酸化成処理を施し、その上に塗膜を被覆して試験片とし、この試験片の塗膜の剥離試験を行った。実施例1と相違する点は、酸化皮膜の除去にレーザーを用いず、ドライアイスショットブラストを用いた点である。具体的には、エアー圧0.6MPa、処理速度10mm/sec、ドライアイスペレット消費量約1kg/分、ペレットサイズ3mmのものを用いて酸化皮膜を除去した。実施例1と同様に、塗装前のリン酸塩化成処理皮膜の付着量を測定し、さらに塗装後の剥離面積を測定した。この結果を表2に示す。
実施例1と同じように、ホットスタンプ成形品に相当する亜鉛メッキ鋼板を作製した後、その表面にリン酸化成処理を施し、その上に塗膜を被覆して試験片とし、この試験片の塗膜の剥離試験を行った。実施例1と相違する点は、酸化皮膜の除去にレーザーを用いず、強化アルカリを用いた点である。具体的には、濃度2%、温度50℃のNaOH水溶液に亜鉛メッキ鋼板を30分間浸漬し、酸化皮膜を除去した。実施例1と同様に、塗装前のリン酸塩化成処理皮膜の付着量を測定し、さらに塗装後の剥離面積を測定した。この結果を表2に示す。
実施例1と同じように、ホットスタンプ成形品に相当する亜鉛メッキ鋼板を作製した後、その表面にリン酸化成処理を施し、その上に塗膜を被覆して試験片とし、この試験片の塗膜の剥離試験を行った。実施例1と相違する点は、酸化皮膜の除去にレーザーを用いず、研磨材を用いた点である。具体的には、研磨材にスコッチブライト#300(住友スリーエム製)で研磨時間5秒の条件で、酸化皮膜を除去した。実施例1と同様に、塗装前のリン酸塩化成処理皮膜の付着量を測定し、さらに塗装後の剥離面積を測定した。この結果を表2に示す。
熱処理をしていない亜鉛メッキ鋼板の表面にリン酸化成処理を施し、その上に塗膜を被覆して試験片とし、この試験片の塗膜の剥離試験を行った。すなわち、参考例では、亜鉛メッキ鋼板を加熱していないので、亜鉛メッキ層の表面には、酸化皮膜が形成されていない。実施例1と同様に、塗装前のリン酸塩化成処理皮膜の付着量を測定し、さらに塗装後の剥離面積を測定した。この結果を表2に示す。
表2に示すように、実施例1〜3の如く、レーザーにより酸化皮膜を除去した場合、リン酸塩化成処理皮膜の付着量は、参考例の加熱処理を行っていないものと同様であった。また、実施例1〜3に係る亜鉛メッキ鋼板の剥離面積率は、比較例1〜4のものよりも低く、実施例1〜3に係る亜鉛メッキ鋼板の塗膜の密着性は、比較例1〜4のものよりも高いと言える。
Claims (2)
- 亜鉛メッキ層が形成された亜鉛メッキ鋼板を加熱し、該加熱された亜鉛メッキ鋼板をホットスタンプにより成形する成形工程と、
該ホットスタンプにより成形された亜鉛メッキ鋼板に塗装処理を行う塗装処理工程と、を少なくとも備えたホットスタンプ成形品の製造方法であって、
前記亜鉛メッキ鋼板に塗装処理を行う前に、前記成形工程の際に前記亜鉛メッキ層の表面に、前記ホットスタンプにより形成された酸化皮膜にレーザーを照射することにより、前記酸化皮膜を除去することを特徴とするホットスタンプ成形品の製造方法。 - 前記塗装処理工程は、前記酸化皮膜が除去された亜鉛メッキ層の表面にリン酸塩化成処理をした後に、該リン酸塩化成処理した表面に塗膜を被覆する工程であることを特徴とする請求項1に記載のホットスタンプ成形品の製造方法。
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| JP2013249033A JP6211908B2 (ja) | 2013-12-02 | 2013-12-02 | ホットスタンプ成形品の製造方法 |
| US15/100,808 US10604849B2 (en) | 2013-12-02 | 2014-11-27 | Method of producing hot-stamped article |
| BR112016012445-6A BR112016012445B1 (pt) | 2013-12-02 | 2014-11-27 | Método de produzir um artigo estampado a quente |
| EP14824530.1A EP3077571B1 (en) | 2013-12-02 | 2014-11-27 | Method of producing hot-stamped article |
| CN201480065830.0A CN105792980B (zh) | 2013-12-02 | 2014-11-27 | 热冲压制品的制造方法 |
| PCT/IB2014/002777 WO2015082993A1 (en) | 2013-12-02 | 2014-11-27 | Method of producing hot-stamped article |
| KR1020167014650A KR101786886B1 (ko) | 2013-12-02 | 2014-11-27 | 핫-스탬프 성형품의 제조방법 |
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Cited By (3)
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| JP2530679Y2 (ja) | 1995-03-06 | 1997-03-26 | 謙二 川端 | 化粧ネジ |
| JP2869614B2 (ja) | 1994-05-02 | 1999-03-10 | 株式会社フクダコーポレーション | アルマイト製品表面への加飾方法 |
| WO2024166854A1 (ja) | 2023-02-07 | 2024-08-15 | 日本製鉄株式会社 | ホットスタンプ成形品およびその製造方法 |
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| KR101717912B1 (ko) | 2015-09-01 | 2017-03-20 | 주식회사 성우하이텍 | 핫 스탬핑용 소재 가열 장치 및 방법 |
| EP3389899A1 (en) * | 2015-12-18 | 2018-10-24 | Autotech Engineering, A.I.E. | Reinforcing structural components |
| KR20180099637A (ko) * | 2015-12-18 | 2018-09-05 | 오토테크 엔지니어링 에이.아이.이. | 강화 구조 컴포넌트들 |
| WO2017208101A1 (de) * | 2016-06-03 | 2017-12-07 | Leistchamm Beteiligungen Ag | Verfahren zur herstellung eines bauteils und ein nach dem verfahren hergestelltes bauteil |
| DE102016225681A1 (de) * | 2016-12-20 | 2018-06-21 | Thyssenkrupp Ag | Vergraute Oberfläche zum Zwecke einer verkürzten Aufheizung |
| JP6964323B2 (ja) * | 2017-04-12 | 2021-11-10 | 株式会社キーレックス | ホットプレス成形品の溶接方法 |
| CA3066259C (en) * | 2017-06-28 | 2023-05-23 | Arconic Inc. | Preparation methods for adhesive bonding of 7xxx aluminum alloys, and products relating to the same |
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| DE102021119426A1 (de) | 2021-07-27 | 2023-02-02 | Bayerische Motoren Werke Aktiengesellschaft | Verfahren zur Herstellung eines pressgehärteten Blechformteils, damit hergestelltes pressgehärtetes Blechformteil und Anlage zur Herstellung pressgehärteter Blechformteile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2869614B2 (ja) | 1994-05-02 | 1999-03-10 | 株式会社フクダコーポレーション | アルマイト製品表面への加飾方法 |
| JP2530679Y2 (ja) | 1995-03-06 | 1997-03-26 | 謙二 川端 | 化粧ネジ |
| WO2024166854A1 (ja) | 2023-02-07 | 2024-08-15 | 日本製鉄株式会社 | ホットスタンプ成形品およびその製造方法 |
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| BR112016012445B1 (pt) | 2021-11-30 |
| US10604849B2 (en) | 2020-03-31 |
| BR112016012445A2 (pt) | 2017-08-08 |
| EP3077571A1 (en) | 2016-10-12 |
| KR101786886B1 (ko) | 2017-10-18 |
| WO2015082993A1 (en) | 2015-06-11 |
| EP3077571B1 (en) | 2017-10-04 |
| KR20160083045A (ko) | 2016-07-11 |
| JP2015105422A (ja) | 2015-06-08 |
| US20160298239A1 (en) | 2016-10-13 |
| CN105792980B (zh) | 2018-03-30 |
| CN105792980A (zh) | 2016-07-20 |
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