JP7704872B2 - アルミニウムめっき鋼板、熱成形部品、および製造方法 - Google Patents
アルミニウムめっき鋼板、熱成形部品、および製造方法 Download PDFInfo
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- JP7704872B2 JP7704872B2 JP2023544455A JP2023544455A JP7704872B2 JP 7704872 B2 JP7704872 B2 JP 7704872B2 JP 2023544455 A JP2023544455 A JP 2023544455A JP 2023544455 A JP2023544455 A JP 2023544455A JP 7704872 B2 JP7704872 B2 JP 7704872B2
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- C—CHEMISTRY; METALLURGY
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- C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/012—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy
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- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C21D1/26—Methods of annealing
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- C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
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- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
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Description
製錬する工程;
圧延する工程;および
連続焼鈍および溶融めっき(hot plating)を行う工程であって、焼鈍温度が710~780℃であり、めっき液の温度が600~660℃であり、めっき液の温度からめっきポットに入る鋼板の温度を差し引いた温度が5℃以下であり、鋼板がめっきポットを出た後に冷却され、めっきポットを出た鋼板の温度からめっき層の凝固温度までの平均冷却速度が15℃/秒より大きく、めっきポットを出た鋼板の温度から200℃までの平均冷却速度が10~30℃/秒である、工程
を含む、上記アルミニウムめっき鋼板の製造方法を提供する。
アルミニウムめっき鋼板をビレットに加工する工程;
ビレットに熱処理を行う工程であって、熱処理の加熱方式が一段式加熱または段階式加熱であり;熱処理の加熱方式が一段式加熱である場合、加熱停止温度が900~1000℃のうちのある温度であり、総加熱時間が10~600秒であり;熱処理の加熱方式が段階式加熱である場合、加熱停止温度が700~1000℃のうちの複数の温度を含み、総加熱時間が1~15分であり、複数の温度のうち最も高い温度が900~1000℃のうちのある温度であり、900~1000℃でのビレットの保持時間が10~600秒である、工程;および
ビレットを熱成形用の金型に移す工程であって、金型に移す際のビレットの温度が650℃以上であり、金型の冷却速度が30℃/秒以上である、工程
を含む、上記熱成形部品の製造方法を提供する。
製錬する工程;
圧延する工程;および
連続焼鈍および溶融めっきを行う工程であって、焼鈍温度が710~780℃であり、めっき液の温度が600~660℃であり、めっき液の温度からめっきポットに入る鋼板の温度を差し引いた温度が5℃以下であり、鋼板がめっきポットを出た後に冷却され、めっきポットを出た鋼板の温度からめっき層の凝固温度までの平均冷却速度が15℃/秒より大きく、めっきポットを出た鋼板の温度から200℃までの平均冷却速度が10~30℃/秒である、工程
を含む、上記アルミニウムめっき鋼板の製造方法を提供する。
アルミニウムめっき鋼板をビレットに加工する工程;
ビレットに熱処理を行う工程であって、熱処理の加熱方式が一段式加熱または段階式加熱であり;熱処理の加熱方式が一段式加熱である場合、加熱停止温度が900~1000℃のうちのある温度であり、総加熱時間が10~600秒であり;熱処理の加熱方式が段階式加熱である場合、段階式加熱の停止温度が700~1000℃のうちの複数の温度を含み、総加熱時間が1~15分であり、複数の温度のうち最も高い温度が900~1000℃のうちのある温度であり、900~1000℃でのビレットの保持時間が10~600秒である、工程;および
ビレットを熱成形用の金型に移す工程であって、金型に移す際のビレットの温度が650℃以上であり、金型の冷却速度が30℃/秒以上である、工程
を含む、上記熱成形部品の製造方法を提供する。本願の実施形態において、熱成形する金型に水冷が施され、金型の冷却速度は、冷却水の流量、流速、および圧力などの条件を調整することによって制御される。
下記の製造方法を用いて、実施例1~6および比較例1~2のアルミニウムめっき鋼板および熱成形部品を製造した。
工程1:製錬して、表1に示す組成を有する基板を得た。
工程2:圧延して、圧延鋼板を得た。圧延した後、酸洗を行って鋼板の表面の酸化物層を除去した。
工程3:連続焼鈍および溶融めっきを行った。この工程では、圧延鋼板に連続的に焼鈍を施し、その後、めっきポットに入れた(めっき液に浸漬した)。浸漬した後、鋼板を冷却して、アルミニウムめっき鋼板を得た。
圧延ならびに連続焼鈍および溶融めっきの具体的なプロセスパラメータを表2に示す。
工程4:アルミニウムめっき鋼板をビレットに加工した。
工程5:ビレットを熱処理した。
工程6:熱処理したビレットを熱成形用の金型に移して、熱成形部品を得た。
熱処理および熱成形の具体的なプロセスパラメータを表3に示す。
切片法を用いて、結晶粒度を算出した。平均結晶粒径=切片断面の長さ/結晶粒の数。
熱成形部品の水素含有量は、G4-PHONEX微量水素濃度分析計を用いて評価した。最大加熱温度は400℃を超えなかった。放出された水素量を記録した。放出された量が多いほど、耐水素脆化性がより劣ることを示す。評価尺度は、1(最も悪い)から5(最も良い)までの範囲である。
GDS850Aグロー放電分光計を用いて試験した。部品の内部層とは、熱成形部品の基板からめっき層中の濃色Feリッチ層までを指し、部品の表面層とは、めっき層中の濃色Feリッチ層からめっき層の表面までを指す。
中性塩噴霧試験を用いて評価した。評価対象の熱成形部品は、電気泳動コーティングを有さなかった。24時間後、赤錆の被覆度を評価するが、5%未満の被覆度は、最も良い性能であることを示す。この実験では、1(最も悪い)から5(最も良い)の評価尺度を用いる。
熱成形部品のビッカース硬度についてGB/T4340.1-2009規格に従って測定した。
2 AlMgSiFe相
Claims (17)
- 基板と上記基板の表面のめっき層とを含むアルミニウムめっき鋼板であって、上記めっき層のミクロ組織が、Mg2Si相およびAlMgSiFe相を含み、上記Mg2Si相が、0.001~5μmの平均結晶粒径を有する、アルミニウムめっき鋼板。
- 上記めっき層が、上記Mg2Si相および上記AlMgSiFe相を含む表面層を含む、請求項1に記載のアルミニウムめっき鋼板。
- 上記めっき層が、Fe-Al合金およびFe-Al-Si合金を含むバリア層をさらに含み、上記バリア層が、5μm以下の厚さを有する、請求項2に記載のアルミニウムめっき鋼板。
- 上記めっき層が、5~50μmの厚さを有する、請求項1に記載のアルミニウムめっき鋼板。
- 上記アルミニウムめっき鋼板の上記基板の組成が、質量パーセントで、0.05~0.5%のC、0.01~2.0%のSi、0.3~3.0%のMn、0.005~0.3%のAl、0.01%≦Ti<0.1%、0.0005%≦B<0.1%、0.05%≦Cr<0.5%、0.0005%≦Nb<0.1%、およびFeを含む、請求項1に記載のアルミニウムめっき鋼板。
- 上記アルミニウムめっき鋼板の上記基板の上記組成が、質量パーセントで、0.05~0.5%のC、0.01~2.0%のSi、0.3~3.0%のMn、0.005~0.3%のAl、0.01%≦Ti<0.1%、0.0005%≦B<0.1%、0.05%≦Cr<0.5%、0.0005%≦Nb<0.1%を含み、残部がFeおよび不可避的不純物であり、
不可避的不純物のうち、質量パーセントで、P<0.3%、S<0.1%、およびV<0.1%である、
請求項5に記載のアルミニウムめっき鋼板。 - 請求項1に記載のアルミニウムめっき鋼板の製造方法であって、
製錬する工程;
圧延する工程;および
連続焼鈍および溶融めっきを行う工程であって、焼鈍温度が710~780℃であり、めっき液の温度が600~660℃であり、上記めっき液の温度からめっきポットに入る鋼板の温度を差し引いた温度が5℃以下であり、上記鋼板が上記めっきポットを出た後に冷却され、上記めっきポットを出た上記鋼板の温度からめっき層の凝固温度までの平均冷却速度が15℃/秒より大きく、上記めっきポットを出た上記鋼板の温度から200℃までの平均冷却速度が10~30℃/秒である、工程
を含む、アルミニウムめっき鋼板の製造方法。 - 上記めっき液の化学組成が、質量パーセントで、5~11%のSiおよび0.5~20%のMgを含む、請求項7に記載のアルミニウムめっき鋼板の製造方法。
- 上記めっき液が、1~10質量%のZnをさらに含む、請求項8に記載のアルミニウムめっき鋼板の製造方法。
- 上記めっき液の残部が、Alおよび不可避的不純物である、請求項8に記載のアルミニウムめっき鋼板の製造方法。
- 上記圧延する工程が、熱間圧延することを含み、上記熱間圧延の巻取温度が、630℃以下である、請求項7に記載のアルミニウムめっき鋼板の製造方法。
- 上記圧延する工程が、冷間圧延することを含み、上記冷間圧延中の変形が、10~70%である、請求項11に記載のアルミニウムめっき鋼板の製造方法。
- 請求項1に記載のアルミニウムめっき鋼板を用いて製造された熱成形部品。
- 上記熱成形部品が表面層および内部層を含み、上記内部層のMgの質量パーセントに対する上記表面層のMgの質量パーセントの比が5以上であり、上記熱成形部品が300以上の芯部硬度HV1を有する、請求項13に記載の熱成形部品。
- 請求項13に記載の熱成形部品の製造方法であって、
上記アルミニウムめっき鋼板をブランクに加工する工程;
上記ブランクに熱処理を行う工程であって、上記熱処理の加熱方式が一段式加熱または段階式加熱であり;上記熱処理の上記加熱方式が一段式加熱である場合、加熱停止温度が900~1000℃のうちのある温度であり、総加熱時間が10~600秒であり;上記熱処理の上記加熱方式が段階式加熱である場合、加熱停止温度が700~1000℃のうちの複数の温度を含み、総加熱時間が1~15分であり、上記複数の温度のうち最も高い温度が900~1000℃のうちのある温度であり、900~1000℃での上記ブランクの保持時間が10~600秒である、工程;および
上記ブランクを熱成形用の金型に移す工程であって、上記金型に移す際の上記ブランクの温度が650℃以上であり、上記金型の冷却速度が30℃/秒以上である、工程
を含む、熱成形部品の製造方法。 - 上記熱成形のプロセスが、ホットスタンプまたは熱間圧延である、請求項15に記載の熱成形部品の製造方法。
- 上記アルミニウムめっき鋼板をブランクに加工する工程の前に、増肉圧延する工程がさらに行われる、請求項15に記載の熱成形部品の製造方法。
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| PCT/CN2021/140835 WO2022161049A1 (zh) | 2021-01-28 | 2021-12-23 | 一种镀铝钢板、热成形部件及制造方法 |
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2021
- 2021-01-28 CN CN202110119239.0A patent/CN114807739A/zh active Pending
- 2021-12-23 WO PCT/CN2021/140835 patent/WO2022161049A1/zh not_active Ceased
- 2021-12-23 US US18/262,156 patent/US20240093342A1/en active Pending
- 2021-12-23 EP EP21922639.6A patent/EP4269646A4/en active Pending
- 2021-12-23 JP JP2023544455A patent/JP7704872B2/ja active Active
- 2021-12-23 KR KR1020237024588A patent/KR102877012B1/ko active Active
- 2021-12-28 TW TW110149205A patent/TWI797924B/zh active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011514935A (ja) | 2008-03-13 | 2011-05-12 | ブルースコープ・スティール・リミテッド | 金属被覆スチールストリップ |
| JP2012528244A (ja) | 2009-05-28 | 2012-11-12 | ブルースコープ・スティール・リミテッド | 金属被覆スチールストリップ |
Also Published As
| Publication number | Publication date |
|---|---|
| US20240093342A1 (en) | 2024-03-21 |
| CN114807739A (zh) | 2022-07-29 |
| TWI797924B (zh) | 2023-04-01 |
| WO2022161049A1 (zh) | 2022-08-04 |
| EP4269646A4 (en) | 2024-11-27 |
| KR20230123502A (ko) | 2023-08-23 |
| CA3209226A1 (en) | 2022-08-04 |
| KR102877012B1 (ko) | 2025-10-28 |
| TW202229565A (zh) | 2022-08-01 |
| JP2024504718A (ja) | 2024-02-01 |
| EP4269646A1 (en) | 2023-11-01 |
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