JP6956778B2 - 圧延接合金属シートの製造方法 - Google Patents
圧延接合金属シートの製造方法 Download PDFInfo
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- JP6956778B2 JP6956778B2 JP2019505203A JP2019505203A JP6956778B2 JP 6956778 B2 JP6956778 B2 JP 6956778B2 JP 2019505203 A JP2019505203 A JP 2019505203A JP 2019505203 A JP2019505203 A JP 2019505203A JP 6956778 B2 JP6956778 B2 JP 6956778B2
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- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
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Description
58%≦Ni≦73%、20%≦Cr≦25%、0%≦Fe≦5%、0%≦C≦0.03%又は0.1%、0%≦Mn≦0.5%、0%≦Si≦0.5%、0%≦Co≦1%、0%≦Al≦0.4%、0%≦Ti≦0.4%、0%≦P≦0.015%、0%≦S≦0.015%、8%≦Mo≦10%、1.5%≦Nb+Ta≦x(xは3.1%、2.8%、2.5%又は2.2%)、残部は不純物。
1.5%≦Nb+Ta≦3.1%
1.5%≦Nb+Ta≦2.8%
1.5%≦Nb+Ta≦2.5%
1.5%≦Nb+Ta≦2.2%
1.7%≦Nb+Ta≦2.3%
59%≦Ni≦69%
60%≦Ni≦69%
21%≦Cr≦23%
0%≦C≦0.03%
0%≦Mn≦0.3%
0%≦Si≦0.4%
0%≦Co≦0.7%
0%≦Al≦0.3%
0%≦Ti≦0.3%
0%≦Ta≦0.5%
0%≦Ta≦0.2%
Cu≦0.3%
W≦0.50%
W≦0.20%
Pb≦0.002%
Zn≦0.002%
Sn≦0.002%
これら含有量が高いと加工性が低下する。
0%≦C≦0.16%、0%≦Si≦0.50%、1.10%≦Mn≦1.65%、0%≦P≦0.022%、0%≦S≦0.010%、0%≦Nb≦0.05%、0%≦Ti≦0.06%、0%≦V≦0.10%、残部は鉄及び不純物。
0%≦C≦0.16%、0%≦Si≦0.50%、1.10%≦Mn≦1.60%、0%≦P≦0.022%、0%≦S≦0.005%、0%≦Cr≦0.50%、0%≦Mo≦0.20%、0%≦Ni≦0.20%、0.020%≦Al≦0.060%、0%≦Cu≦0.20%、0%≦N≦0.014%、0%≦Nb≦0.05%、0%≦Ti≦0.02%、0%≦V≦0.010%、0%≦As≦0.02%、0%≦Sb≦0.01%、0%≦Sn≦0.015%、0%≦Pb≦0.010%、0%≦Bi≦0.010%、0%≦Ca≦0.005%、0%≦B≦0.0005%、0%≦Cr+Mo+Ni+Cu≦0.5%、0%≦Nb+V≦0.10%及び0%≦Nb+V+Ti≦0.15%、残部は鉄及び不純物であり、更に、CEV≦0.43%及びPcm≦0.25%を満たす。(ここで、CEV=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15であり、Pcm=C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5Bである)。
PREN=Cr+3.3×(Mo+W)+16×N
ここで、Cr、Mo、W及びNはそれぞれの元素の含有量(質量%)である。Cr、Mo、W、Nの各含有量が高いと耐孔食性が高い。PRENは、更に影響するパラメータを含まない、経験的な式である。
Claims (20)
- 圧延接合クラッド金属シートの製造方法であって、
金属基材からなる層と金属クラッド材からなる層とを合一して積層体を製造する工程と、
前記積層体を加熱する工程と、
加熱した前記積層体を熱機械的に圧延する工程であって、前記金属基材からなる層と前記金属クラッド材からなる層との間に冶金的接合を形成するために、加熱した前記積層体の予備圧延を行う第一圧延フェーズと、前記積層体の最終成形のための第二圧延フェーズと、前記第一圧延フェーズ及び前記第二圧延フェーズの間の冷却期間とを含む工程と
を包含し、
前記金属クラッド材はニッケル基材料であって、その化学組成は、質量%で、50%を超えるNiと、0.5%≦Nb≦3.1%のNbとを含み、
前記第二圧延フェーズで実施する最終圧延の温度は、880℃以下に設定する、製造方法。 - 前記第二圧延フェーズで実施する最終圧延の温度は、850℃以下に設定する、請求項1に記載の方法。
- 前記金属クラッド材の化学組成は、質量%で、2.8%以下のNbを含む、請求項1に記載の方法。
- 前記金属クラッド材の化学組成は、質量%で、Nb+Ta≦2.8%である、請求項3に記載の方法。
- 前記金属クラッド材の化学組成は、質量%で、2.5%以下のNbを含む、請求項3に記載の方法。
- 前記金属クラッド材の化学組成は、質量%で、Nb+Ta≦2.5%である、請求項5に記載の方法。
- 前記金属クラッド材はニッケル−クロム−モリブデン−ニオブ合金である、請求項1〜6のいずれか一項に記載の方法。
- 前記金属クラッド材の化学組成は、質量%で、58%≦Ni≦73%、20%≦Cr≦25%、0%≦Fe≦5%、0%≦C≦0.1%、0%≦Mn≦0.5%、0%≦Si≦0.5%、0%≦Co≦1%、0%≦Al≦0.4%、0%≦Ti≦0.4%、0%≦P≦0.015%、0%≦S≦0.015%、8%≦Mo≦10%、1.5%≦Nb+Ta≦2.8%、残部は不純物である、請求項1〜7のいずれか一項に記載の方法。
- 前記金属クラッド材は、質量%で、下記元素の少なくとも1種を任意でさらに含む、請求項8に記載の方法。
0%≦Ta≦1%、0%≦B≦0.008%、Cu≦0.5%、W≦1%、V≦0.5%、N≦0.05%、Mg≦0.05%、Ca≦0.05%、Pb≦0.002%、Zn≦0.002%、Sn≦0.002%。 - 前記金属基材は炭素鋼である、請求項1〜9のいずれか一項に記載の方法。
- 前記炭素鋼の化学組成は、質量%で、下記範囲の少なくとも1種を満たす、請求項10に記載の方法。
0%≦C≦0.30%、0%≦Si≦0.50%、1.10%≦Mn≦1.65%、0%≦P≦0.022%、0%≦S≦0.010%、0%≦Nb≦0.05%、0%≦Ti≦0.06%、0%≦V≦0.10%(質量%)、残部は鉄及び不純物である。 - 前記第一圧延フェーズは、1000℃〜1200℃の初期圧延温度で実施する、請求項1〜11のいずれか一項に記載の方法。
- 前記最終圧延の温度は、前記金属基材からなる層の再結晶停止温度より低い、請求項1〜12のいずれか一項に記載の方法。
- 圧延フェーズ間の前記冷却期間は、大気中で3〜15分である、請求項1〜13のいずれか一項に記載の方法。
- 冶金的接合により互いに接合された金属基材層と金属クラッド材からなる層とを含む、圧延接合クラッド金属シートであって、
前記金属クラッド材はニッケル基材料であり、その化学組成は、質量%で、50%を超えるNiと、0.5≦Nb≦2.8%のNbとを含む、
圧延接合クラッド金属シート。 - 前記金属クラッド材の化学組成は、Taをさらに含み、質量%で、Nb+Ta≦2.8%である、請求項15に記載の圧延接合クラッド金属シート。
- 前記金属基材層の厚さは25mm以上である、請求項15〜16のいずれか一項に記載の圧延接合クラッド金属シート。
- 前記金属基材層の化学組成は、API 5L規格、DNV OS−F101、ISO 3183又は他の同様の規格の1以上に従う、請求項15〜17のいずれか一項に記載の圧延接合クラッド金属シート。
- 前記金属基材層は、ノッチ付き衝撃試験で測定した靭性が、−70℃において50J以上、及び/又はバテル落錘式衝撃試験後のマット破壊比が、−20℃において80%以上である、請求項15〜18のいずれか一項に記載の圧延接合クラッド金属シート。
- 前記金属クラッド材からなる層の厚さは2mm以上である、請求項15〜19のいずれか一項に記載の圧延接合クラッド金属シート。
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