JP6558436B2 - 溶融亜鉛系めっき鋼板 - Google Patents
溶融亜鉛系めっき鋼板 Download PDFInfo
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- JP6558436B2 JP6558436B2 JP2017510222A JP2017510222A JP6558436B2 JP 6558436 B2 JP6558436 B2 JP 6558436B2 JP 2017510222 A JP2017510222 A JP 2017510222A JP 2017510222 A JP2017510222 A JP 2017510222A JP 6558436 B2 JP6558436 B2 JP 6558436B2
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- oxide
- hot
- less
- steel sheet
- dip galvanized
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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
- B32B15/013—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 a metal other than iron or aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/40—Distributing applied liquids or other fluent materials by members moving relatively to surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0272—After-treatment with ovens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- 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
- B21D22/02—Stamping using rigid devices or tools
- B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
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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
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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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
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/043—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
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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
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/41—Organic pigments; Organic dyes
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- C—CHEMISTRY; METALLURGY
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- 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
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- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
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- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C22C—ALLOYS
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- C—CHEMISTRY; METALLURGY
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- C22C—ALLOYS
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Description
本発明の要旨は、以下の通りである。
(2)基材である素地鋼板と、前記素地鋼板の上に設けられた溶融亜鉛系めっき層と、少なくとも片面の前記溶融亜鉛系めっき層の上に形成された表面処理層と、を備え、前記表面処理層は、900〜1300Kの温度域において、同一温度での酸化物の標準生成自由エネルギー(ΔG 0 )が、酸化亜鉛の標準生成自由エネルギー(ΔG 0 Zn )よりも小さく、かつ、酸化アルミニウムの標準生成自由エネルギー(ΔG 0 Al )よりも大きい粒状の金属酸化物を、金属換算で片面当たり、0.1g/m 2 以上1.2g/m 2 以下含有し、前記表面処理層は、更に、900〜1300Kの温度域において、同一温度での酸化物の標準生成自由エネルギー(ΔG 0 )が、酸化アルミニウムの標準生成自由エネルギー(ΔG 0 Al )よりも小さいアルカリ土類金属の酸化物を、金属換算で片面当たり、0.05g/m 2 以上0.35g/m 2 以下含有し、前記粒状の金属酸化物の粒径は、3nm以上100nm以下である、熱間プレス用溶融亜鉛系めっき鋼板。
(3)前記表面処理層は、リン含有化合物、バナジウム含有化合物、銅含有化合物、アルミニウム含有化合物、又は、クロム含有化合物の少なくとも何れかを、片面当たりの含有量として、以下に示す範囲で更に含有する、(1)又は(2)に記載の熱間プレス用溶融亜鉛系めっき鋼板。
リン含有化合物:P換算で、0.0g/m2以上0.01g/m2以下
バナジウム含有化合物:V換算で、0.0g/m2以上0.01g/m2以下
銅含有化合物:Cu換算で、0.0g/m2以上0.02g/m2以下
アルミニウム含有化合物:Al換算で、0.0g/m2以上0.005g/m2以下
クロム含有化合物:Cr換算で、0.0g/m2以上0.01g/m2以下
(4)前記素地鋼板は、質量%で、C:0.05〜0.4%、Si:0.5%以下、Mn:0.5〜2.5%、P:0.03%以下、S:0.01%以下、sol.Al:0.1%以下、N:0.01%以下、B:0〜0.005%、Ti:0〜0.1%、Cr:0〜0.5%、Nb:0〜0.1%、Ni:0〜1.0%、Mo:0〜0.5%を含有し、残部は、Fe及び不純物からなる化学組成を有する、(1)〜(3)の何れか1つに記載の熱間プレス用溶融亜鉛系めっき鋼板。
(5)前記素地鋼板は、質量%で、C:0.05〜0.4%、Si:0.5%以下、Mn:0.5〜2.5%、P:0.03%以下、S:0.01%以下、sol.Al:0.1%以下、N:0.01%以下、B:0〜0.005%、Ti:0〜0.1%、Cr:0%超過0.5%以下、Nb:0〜0.1%、Ni:0〜1.0%、Mo:0〜0.5%を含有し、残部は、Fe及び不純物からなる化学組成を有しており、かつ、Mn+Cr:0.5〜3.0%の関係を満足する、(1)〜(3)の何れか1つに記載の熱間プレス用溶融亜鉛系めっき鋼板。
(6)前記粒状の金属酸化物は、チタンの酸化物である、(1)〜(5)の何れか1つに記載の熱間プレス用溶融亜鉛系めっき鋼板。
(7)前記粒状の金属酸化物の粒径は、5nm以上30nm以下である、(1)〜(6)の何れか1つに記載の熱間プレス用溶融亜鉛系めっき鋼板。
(8)前記粒状の金属酸化物の含有量は、金属換算で片面当たり、0.2g/m2以上0.8g/m2以下である、(1)〜(7)の何れか1つに記載の熱間プレス用溶融亜鉛系めっき鋼板。
(9)前記アルカリ土類金属の酸化物は、カルシウムの酸化物又はマグネシウムの酸化物である、(1)〜(8)の何れか1つに記載の熱間プレス用溶融亜鉛系めっき鋼板。
(10)前記アルカリ土類金属の酸化物の含有量は、金属換算で片面当たり、0.05g/m2以上0.2g/m2以下である、(1)〜(9)の何れか1つに記載の熱間プレス用溶融亜鉛系めっき鋼板。
本発明の実施形態に係る溶融亜鉛系めっき鋼板は、素地鋼板の上に溶融亜鉛系めっき層を備え、更に、かかる溶融亜鉛系めっき層上の少なくとも片面に、以下で詳述する表面処理層を備える。この表面処理層は、900〜1300Kの温度域において、同一温度での酸化物の標準生成自由エネルギー(ΔG0)が、酸化亜鉛の標準生成自由エネルギー(ΔG0 Zn)よりも小さく、かつ、酸化アルミニウムの標準生成自由エネルギー(ΔG0 Al)よりも大きい粒状の酸化物を、金属換算で片面当たり、0.1g/m2以上1.2g/m2以下含有し、粒状の酸化物の粒径は、3nm以上100nm以下である。かかる構成を有する溶融亜鉛系めっき鋼板は、先だって説明した熱間プレス法に好適に用いることが可能である。以下では、かかる溶融亜鉛系めっき鋼板の構成について、詳細に説明する。
本実施形態に係る溶融亜鉛系めっき鋼板に用いられる素地鋼板については、特に限定されるものではなく、公知の特性や化学組成を有する各種の鋼板を使用することが可能である。鋼板の化学組成は、特に限定されるものではないが、焼き入れによって高強度を得られる化学組成であることが好ましい。例えば、引張強度が980MPa以上の熱処理鋼材を得ようとする場合には、素地鋼板が、質量%で、C:0.05〜0.4%、Si:0.5%以下、Mn:0.5〜2.5%、P:0.03%以下、S:0.01%以下、sol.Al:0.1%以下、N:0.01%以下、B:0〜0.005%、Ti:0〜0.1%、Cr:0〜0.5%、Nb:0〜0.1%、Ni:0〜1.0%、及び、Mo:0〜0.5%を含有し、残部は、Fe及び不純物からなる化学組成を有する焼入用鋼からなることが例示される。
本実施形態に係る溶融亜鉛系めっき層としては、特に限定されるものではなく、一般に知られている溶融亜鉛系めっきを使用することが可能である。具体的には、本実施形態に係る溶融亜鉛系めっき層として、溶融亜鉛めっき、合金化溶融亜鉛めっき、溶融Zn−55%Alめっき、溶融Zn−11%Alめっき、溶融Zn−11%Al−3%Mgめっき、溶融Zn−7%Al−3%Mgめっき、溶融Zn−11%Al−3%Mg−0.2%Siめっき等を挙げることができる。
上記のような溶融亜鉛系めっき層の上には、更に、900〜1300Kの温度域において、同一温度での酸化物の標準生成自由エネルギー(ΔG0)が、酸化亜鉛の標準生成自由エネルギー(ΔG0 Zn)よりも小さく、かつ、酸化アルミニウムの標準生成自由エネルギー(ΔG0 Al)よりも大きい粒状の酸化物を含有する、表面処理層が形成されている。かかる酸化物は、亜鉛系めっき層に含まれるAlによって還元され、Znに比べて優先的に酸化されることで、酸化亜鉛の生成を抑制すると考えられる。
先だって説明したような溶融亜鉛系めっき鋼板に熱間プレス法を適用する場合、溶融亜鉛系めっき鋼板は、所定の温度まで加熱された後、プレス成形が行われる。本実施形態に係る溶融亜鉛系めっき鋼板の場合、熱間プレス成形を行うことから、通常、700〜1000℃に加熱するが、急速冷却後にマルテンサイト単相としたり、マルテンサイトを体積率で90%以上としたりする場合には、加熱温度の下限温度は、Ac3点以上とすることが重要である。本発明の場合、急速冷却後マルテンサイト/フェライトの2相域の場合も包含されるため、加熱温度としては、上記のように700〜1000℃とすることが好ましい。
以下では、まず、以下の表1に示す化学組成を有する溶鋼を製造した。その後、製造したそれぞれの溶鋼を用いて、連続鋳造法によりスラブを製造した。得られたスラブを熱間圧延し、熱延鋼板を製造した。続いて、熱延鋼板を酸洗した後、冷間圧延を実施して、冷延鋼板を製造し、表1に記載の化学組成を有する鋼#1〜#8の鋼板を作製した。表1に示すとおり、各鋼種の鋼板の板厚は、いずれも1.6mmであった。
鋼#1〜#8の鋼板に溶融亜鉛めっき処理を行い、その後、合金化処理を実施した。合金化処理での最高温度は、いずれも530℃であり、約30秒加熱した後、室温まで冷却し、合金化溶融亜鉛めっき鋼板(GA)を製造した。また、鋼#1を用いて溶融亜鉛めっき処理を行い、合金化処理を行わずに、溶融亜鉛めっき鋼板(GI)を製造した。
A1:溶融Zn−55%Al
A2:溶融Zn−6%Al−3%Mg
A3:溶融Zn−11%Al−3%Mg−0.2%Si
次いで、表2に示される組成及び付着量となる皮膜を形成するため、酸化物及び薬剤を、水を用いてブレンドした。粉末状態の酸化物は、樹脂を添加した水に分散し、ボールミルで粉末を樹脂分酸溶液に分散する程度に粉砕後、使用した。得られた処理液をバーコータで塗布し、最高到達温度100℃で8秒間保持されるような条件でオーブンを用いて乾燥することにより、熱間プレス用めっき鋼板を製造した。処理液の付着量は、表面処理層中の酸化物の金属換算の片面当たりの付着量が表2に示される数値になるように、液の希釈及びバーコータの番手により調整した。
表2中の各成分(記号)は、以下の通りである。
TPA:チタニア粉末(イオリテック社製)、粒径10〜30nm(カタログ値)
TPB:チタニア粉末(テイカ(株) TITANIX JA−1)、粒径180nm(カタログ値)
TZ:チタニアゾル(テイカ(株)チタニアゾルTKS−203)、粒径6nm(カタログ値)
SZ:シリカゾル(日産化学工業(株)スノーテックスST−C)、粒径10〜20nm(カタログ値)
MP:酸化マンガン(Mn3O4)粉末(イオックス社製)、平均粒径25nm(カタログ値)
なお、上記5種類の酸化物は、同一温度での標準生成自由エネルギー(ΔG0)が、ZnOの標準生成自由エネルギー(ΔG0 Zn)より小さく、かつ、Al2O3の標準生成自由エネルギー(ΔG0 Al)より大きい物質である。
Mg:酸化Mg(高純度化学(株)酸化マグネシウム)
Ca:酸化Ca(高純度化学(株)酸化カルシウム)
Sr:酸化Sr(高純度化学(株)酸化ストロンチウム)
A:ウレタン系樹脂エマルション(第一工業製薬(株)スーパーフレックス(登録商標)E−2000)
B:ウレタン系樹脂エマルション(第一工業製薬(株)スーパーフレックス(登録商標)150)
C:ポリエステル樹脂エマルション(東洋紡(株)バイロナール(登録商標)MD1480)
M:メラミン樹脂(三井サイテック(株)サイメル(登録商標)325)
Z:炭酸ジルコニウムアンモニウム(キシダ化学(株)炭酸ジルコニウムアンモニウム溶液)
S:シランカップリング剤(日美商事(株)サイラエースS510)
PZ:亜リン酸亜鉛(東邦顔料(株)NP−530)(P含有化合物)
Al:アルミナゾル(日産化学(株)AS−200)(Al含有化合物)
V:バナジン酸カリウム(一般試薬)(V含有化合物)
Cr:酸化Cr(VI)(一般試薬)(Cr含有化合物)
Cu:酸化銅(II)(一般試薬)(Cu含有化合物)
表面処理層の形成工程後、各試験番号の鋼板に対して、炉加熱の加熱方式にて熱間プレス加熱を行い、熱間プレスを実施した。炉加熱では、炉内雰囲気を910℃、空燃比を1.1とし、鋼板温度が900℃に到達後速やかに炉内から取り出した。
[酸化亜鉛量の定量]
化学分析による酸化亜鉛層の定量方法としては、5%ヨウ素−メタノール溶液でめっき層を溶解し、発生した残査を塩酸に溶解し定量する方法や重クロム酸アンモニウム水溶液にて表面の酸化膜を溶解し定量する方法のいずれもが用いられる。ここで、溶解した溶液は、それぞれの溶液のブランクを使用してICP法などの発光分析などで定量することができる。
評価試験片の端面及び裏面をポリエステルテープでマスキングして、下記サイクル条件のサイクル腐食試験を90サイクル実施した。
塩水噴霧(SST、5%NaCl、35℃雰囲気)2hr→乾燥(60℃)2hr→湿潤(50℃、98%RH)4hrを1サイクルとして、実施した。
金型への凝着性を定量化する指標として、上述の平板金型を用い、熱間プレスにより得られた鋼板表面の皮膜密着性を測定することで、定量化を行った。
具体的には、得られた鋼板の表面について、ニチバン製のポリエステルテープを用いて、熱間プレス成形後の表層皮膜の剥離テストを行った。この際、剥離テープの剥離量を下地の透過度合いとして、ミノルタ製の色彩色差計CR−300を用いて明度指数として評価した。評価方法は、明度指数L*のN=3平均値(L*ave)が55以下となる場合を「C」とし、表層皮膜の剥離が大きく、金型への耐凝着性に劣るとした。また、L*aveが55超60以下となる場合を「B」とし、L*aveが60超となる場合を「A」とした。「A」、「B」については、表層皮膜の剥離が抑制されており、金型への耐凝着性に優れると判断した。
Claims (10)
- 基材である素地鋼板と、
前記素地鋼板の上に設けられた溶融亜鉛系めっき層と、
少なくとも片面の前記溶融亜鉛系めっき層の上に形成された表面処理層と、
を備え、
前記表面処理層は、900〜1300Kの温度域において、同一温度での酸化物の標準生成自由エネルギー(ΔG0)が、酸化亜鉛の標準生成自由エネルギー(ΔG0 Zn)よりも小さく、かつ、酸化アルミニウムの標準生成自由エネルギー(ΔG0 Al)よりも大きい粒状の金属酸化物(但し、粒状の酸化物がケイ素の酸化物である場合を除く)を、金属換算で片面当たり、0.1g/m2以上1.2g/m2以下含有し、
前記表面処理層は、更に、900〜1300Kの温度域において、同一温度での酸化物の標準生成自由エネルギー(ΔG 0 )が、酸化アルミニウムの標準生成自由エネルギー(ΔG 0 Al )よりも小さいアルカリ土類金属の酸化物を、金属換算で片面当たり、0.05g/m 2 以上0.35g/m 2 以下含有し、
前記粒状の金属酸化物の粒径は、3nm以上100nm以下である、熱間プレス用溶融亜鉛系めっき鋼板。 - 基材である素地鋼板と、
前記素地鋼板の上に設けられた溶融亜鉛系めっき層と、
少なくとも片面の前記溶融亜鉛系めっき層の上に形成された表面処理層と、
を備え、
前記表面処理層は、900〜1300Kの温度域において、同一温度での酸化物の標準生成自由エネルギー(ΔG 0 )が、酸化亜鉛の標準生成自由エネルギー(ΔG 0 Zn )よりも小さく、かつ、酸化アルミニウムの標準生成自由エネルギー(ΔG 0 Al )よりも大きい粒状の金属酸化物を、金属換算で片面当たり、0.1g/m 2 以上1.2g/m 2 以下含有し、
前記表面処理層は、更に、900〜1300Kの温度域において、同一温度での酸化物の標準生成自由エネルギー(ΔG 0 )が、酸化アルミニウムの標準生成自由エネルギー(ΔG 0 Al )よりも小さいアルカリ土類金属の酸化物を、金属換算で片面当たり、0.05g/m 2 以上0.35g/m 2 以下含有し、
前記粒状の金属酸化物の粒径は、3nm以上100nm以下である、熱間プレス用溶融亜鉛系めっき鋼板。 - 前記表面処理層は、リン含有化合物、バナジウム含有化合物、銅含有化合物、アルミニウム含有化合物、又は、クロム含有化合物の少なくとも何れかを、片面当たりの含有量として、以下に示す範囲で更に含有する、請求項1又は2に記載の熱間プレス用溶融亜鉛系めっき鋼板。
リン含有化合物:P換算で、0.0g/m2以上0.01g/m2以下
バナジウム含有化合物:V換算で、0.0g/m2以上0.01g/m2以下
銅含有化合物:Cu換算で、0.0g/m2以上0.02g/m2以下
アルミニウム含有化合物:Al換算で、0.0g/m2以上0.005g/m2以下
クロム含有化合物:Cr換算で、0.0g/m2以上0.01g/m2以下 - 前記素地鋼板は、質量%で、
C:0.05〜0.4%
Si:0.5%以下
Mn:0.5〜2.5%
P:0.03%以下
S:0.01%以下
sol.Al:0.1%以下
N:0.01%以下
B:0〜0.005%
Ti:0〜0.1%
Cr:0〜0.5%
Nb:0〜0.1%
Ni:0〜1.0%
Mo:0〜0.5%
を含有し、残部は、Fe及び不純物からなる化学組成を有する、請求項1〜3の何れか1項に記載の熱間プレス用溶融亜鉛系めっき鋼板。 - 前記素地鋼板は、質量%で、
C:0.05〜0.4%
Si:0.5%以下
Mn:0.5〜2.5%
P:0.03%以下
S:0.01%以下
sol.Al:0.1%以下
N:0.01%以下
B:0〜0.005%
Ti:0〜0.1%
Cr:0%超過0.5%以下
Nb:0〜0.1%
Ni:0〜1.0%
Mo:0〜0.5%
を含有し、残部は、Fe及び不純物からなる化学組成を有しており、かつ、
Mn+Cr:0.5〜3.0%
の関係を満足する、請求項1〜3の何れか1項に記載の熱間プレス用溶融亜鉛系めっき鋼板。 - 前記粒状の金属酸化物は、チタンの酸化物である、請求項1〜5の何れか1項に記載の熱間プレス用溶融亜鉛系めっき鋼板。
- 前記粒状の金属酸化物の粒径は、5nm以上30nm以下である、請求項1〜6の何れか1項に記載の熱間プレス用溶融亜鉛系めっき鋼板。
- 前記粒状の金属酸化物の含有量は、金属換算で片面当たり、0.2g/m2以上0.8g/m2以下である、請求項1〜7の何れか1項に記載の熱間プレス用溶融亜鉛系めっき鋼板。
- 前記アルカリ土類金属の酸化物は、カルシウムの酸化物又はマグネシウムの酸化物である、請求項1〜8の何れか1項に記載の熱間プレス用溶融亜鉛系めっき鋼板。
- 前記アルカリ土類金属の酸化物の含有量は、金属換算で片面当たり、0.05g/m2以上0.2g/m2以下である、請求項1〜9の何れか1項に記載の熱間プレス用溶融亜鉛系めっき鋼板。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR102357684B1 (ko) | 2020-09-25 | 2022-02-07 | 현대제철 주식회사 | 내식성이 우수한 핫스탬핑 부품의 제조방법 및 이에 의해 제조된 핫스탬핑 부품 |
KR102365408B1 (ko) | 2020-09-25 | 2022-02-21 | 현대제철 주식회사 | 내식성이 우수한 핫스탬핑 부품의 제조방법 및 이에 의해 제조된 핫스탬핑 부품 |
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TWI591207B (zh) | 2017-07-11 |
EP3263742B1 (en) | 2023-12-13 |
KR102029029B1 (ko) | 2019-10-08 |
CN115261852A (zh) | 2022-11-01 |
WO2016159298A1 (ja) | 2016-10-06 |
US10987695B2 (en) | 2021-04-27 |
MX2017011743A (es) | 2017-11-13 |
BR112017020270A2 (ja) | 2018-05-22 |
US20180050367A1 (en) | 2018-02-22 |
JPWO2016159298A1 (ja) | 2018-02-15 |
KR20170120636A (ko) | 2017-10-31 |
EP3263742A4 (en) | 2018-09-26 |
EP3263742A1 (en) | 2018-01-03 |
TW201641720A (zh) | 2016-12-01 |
CN107406987A (zh) | 2017-11-28 |
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