JP2017186597A5 - - Google Patents
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- JP2017186597A5 JP2017186597A5 JP2016075126A JP2016075126A JP2017186597A5 JP 2017186597 A5 JP2017186597 A5 JP 2017186597A5 JP 2016075126 A JP2016075126 A JP 2016075126A JP 2016075126 A JP2016075126 A JP 2016075126A JP 2017186597 A5 JP2017186597 A5 JP 2017186597A5
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- JP
- Japan
- Prior art keywords
- hot
- substrate according
- intermetallic compound
- area ratio
- rolling
- Prior art date
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- 239000000758 substrate Substances 0.000 description 8
- 238000005336 cracking Methods 0.000 description 6
- 229910000765 intermetallic Inorganic materials 0.000 description 5
- 238000005098 hot rolling Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910019064 Mg-Si Inorganic materials 0.000 description 1
- 229910019406 Mg—Si Inorganic materials 0.000 description 1
- 229910018104 Ni-P Inorganic materials 0.000 description 1
- 229910018536 Ni—P Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Description
次に、本発明の効果を奏する実施例とそうでない比較例を対比して本発明に係るブランクおよびサブストレートについてより詳細に説明する。
表1のNo.1〜15、20、30〜33に示す化学組成(質量%)のAl合金を用い、No.1〜15、30〜33に係るサブストレートを以下のようにして製造した。なお、No.20は、熱間割れが生じたため、サブストレートを製造できなかった(表2参照)。ここで、表1中の「―」は該当する成分を添加しておらず、検出限界値未満であることを示し、下線は本発明の要件を満たしていないことを示している。また、表1の「Fe,Mn,Niの合計量」および「Cr,Ti,Zrの合計量」の算出にあたり、「―」で示されている含有量は0質量%として計算を行った。
Next, the blank and the substrate according to the present invention will be described in more detail by comparing an example having the effects of the present invention with a comparative example that does not.
No. 1 in Table 1. Using an Al alloy having a chemical composition (% by mass) shown in Nos. 1 to 15, 20, and 30 to 33, Substrates 1 to 15 and 30 to 33 were produced as follows. In addition, No. In No. 20 , a substrate could not be produced due to hot cracking (see Table 2). Here, "-" in Table 1 indicates that the corresponding component was not added and was below the detection limit value, and the underline indicates that the requirements of the present invention were not satisfied. In calculating "the total amount of Fe, Mn, and Ni" and "the total amount of Cr, Ti, and Zr" in Table 1, the content indicated by "-" was calculated as 0 mass%.
鋳造工程は、750℃で材料を溶解し、鋳造した。得られた鋳塊は、2mm/片面の面削を行った。
均質化熱処理工程は、No.1〜15、20については540℃で8時間行い、No.30〜33については450℃で8時間行い、炉から取り出した後に5分以内に熱間圧延を開始した。
熱間圧延工程は、No.1〜15、20については開始温度を520〜540℃とし、終了温度を300〜330℃とし、圧延後の板厚は3mmとなるように行った。No.30〜33については開始温度を430〜450℃とし、終了温度を300〜330℃とし、圧延後の板厚は3mmとなるように行った。なお、この熱間圧延工程で熱間割れが生じたもの(No.20)については、表面に占める金属間化合物の面積率と、表面に占める単体SiおよびMg−Si系金属間化合物の面積率の合計と、を調べるため、割れていない部分を用いて研磨し、後記するようにして金属間化合物の面積率などを測定した。なお、金属間化合物の面積率の値は、熱間圧延後の熱間圧延板を測定しても矯正焼鈍後のブランクを測定しても変わらない。
In the casting step, the material was melted and cast at 750 ° C. The obtained ingot was chamfered at 2 mm / one side.
The homogenizing heat treatment step 1-15, 2 0 carried out for 8 hours at 540 ° C. for, No. For 30 to 33, the rolling was performed at 450 ° C. for 8 hours, and the hot rolling was started within 5 minutes after being taken out of the furnace.
The hot rolling step is performed in the 1-15, the 2 0 is set to five hundred twenty to five hundred and forty ° C. The starting temperature, an end temperature of 300 to 330 ° C., the plate thickness after rolling was performed so that the 3 mm. No. For 30 to 33, the starting temperature was set to 430 to 450 ° C, the ending temperature was set to 300 to 330 ° C, and the sheet thickness after rolling was set to 3 mm. In the case of hot cracking in the hot rolling step (No. 20 ), the area ratio of the intermetallic compound occupying the surface and the area ratio of the elemental Si and the Mg-Si based intermetallic compound occupying the surface were determined. In order to examine the sum of the above, the unbroken portion was polished, and the area ratio of the intermetallic compound was measured as described later. The value of the area ratio of the intermetallic compound does not change when the hot-rolled plate after hot rolling is measured or when the blank after straightening annealing is measured.
表2に、No.1〜15、30〜33に係るサブストレートに対して行った測定結果および評価結果を示す(なお、前記したようにNo.20に係るサブストレートは熱間割れが生じたため、ヤング率、耐力、表面に形成した無電解Ni−Pめっき膜の平滑性については評価および測定を行わなかった。)。ここで、表2中の下線は本発明の要件を満たしていないことを示している。 In Table 2, No. The measurement results and evaluation results performed on the substrate according to 1~15,30~33 (Since the substrate according to No. 20 as described above hot cracking occurs, Young's modulus, yield strength, Evaluation and measurement were not performed on the smoothness of the electroless Ni-P plating film formed on the surface.) Here, the underline in Table 2 indicates that the requirements of the present invention are not satisfied.
なお、前記したように、No.20に係るサブストレートは、熱間割れが生じたため製造することができなかった(比較例)。
具体的には、No.20に係るサブストレートは、Cr、Ti、Zrの合計量が上限を超えていたため、熱間割れが生じた。
なお、熱間割れが生じたNo.20に係るサブストレートは、表面に占める前記した金属間化合物の面積率が上限を超えていた。
In addition, as described above, No. Substrate according to 20, could not be produced for hot cracking occurred (ratio Comparative Examples).
Specifically, N o. Substrate according to 2 0, since the Cr, Ti, the total amount of Zr exceeds the upper limit, hot cracking occurred.
Name your, hot cracking occurs No. Substrate according to 20, wherein the area ratio of the intermetallic compound occupying the front surface exceeds the upper limit.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016075126A JP6684139B2 (en) | 2016-04-04 | 2016-04-04 | Aluminum alloy blanks for magnetic disks and aluminum alloy substrates for magnetic disks |
MYPI2018703446A MY185680A (en) | 2016-03-25 | 2017-03-10 | Aluminum alloy blank for magnetic disc and aluminum alloy substrate for magnetic disc |
CN201780019748.8A CN108884520B (en) | 2016-03-25 | 2017-03-10 | Aluminum alloy blank for magnetic disk and aluminum alloy substrate for magnetic disk |
PCT/JP2017/009809 WO2017163943A1 (en) | 2016-03-25 | 2017-03-10 | Aluminum alloy blank for magnetic disc and aluminum alloy substrate for magnetic disc |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016075126A JP6684139B2 (en) | 2016-04-04 | 2016-04-04 | Aluminum alloy blanks for magnetic disks and aluminum alloy substrates for magnetic disks |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2020058838A Division JP2020114944A (en) | 2020-03-27 | 2020-03-27 | Aluminum alloy sheet for magnetic disk, aluminum alloy blank for magnetic disk, and aluminum alloy substrate for magnetic disk |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2017186597A JP2017186597A (en) | 2017-10-12 |
JP2017186597A5 true JP2017186597A5 (en) | 2019-12-19 |
JP6684139B2 JP6684139B2 (en) | 2020-04-22 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2016075126A Active JP6684139B2 (en) | 2016-03-25 | 2016-04-04 | Aluminum alloy blanks for magnetic disks and aluminum alloy substrates for magnetic disks |
Country Status (1)
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JP (1) | JP6684139B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7027210B2 (en) | 2018-03-26 | 2022-03-01 | 株式会社Uacj | Aluminum alloy plate for magnetic disk and its manufacturing method, and magnetic disk using the aluminum alloy plate for magnetic disk |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6437583B2 (en) * | 2017-02-27 | 2018-12-12 | 株式会社Uacj | Aluminum alloy plate for magnetic disk substrate, manufacturing method thereof, and magnetic disk using the aluminum alloy plate for magnetic disk substrate |
JP6427290B1 (en) * | 2017-11-22 | 2018-11-21 | 株式会社Uacj | Aluminum alloy substrate for magnetic disk, method of manufacturing the same, and magnetic disk using the aluminum alloy substrate for magnetic disk |
JP6908741B2 (en) * | 2019-03-14 | 2021-07-28 | 株式会社神戸製鋼所 | Aluminum alloy blanks for magnetic disks and aluminum alloy substrates for magnetic disks |
JP6826679B2 (en) * | 2019-03-14 | 2021-02-03 | 株式会社神戸製鋼所 | Aluminum alloy blanks for magnetic disks and aluminum alloy substrates for magnetic disks |
JP2020114944A (en) * | 2020-03-27 | 2020-07-30 | 株式会社神戸製鋼所 | Aluminum alloy sheet for magnetic disk, aluminum alloy blank for magnetic disk, and aluminum alloy substrate for magnetic disk |
JP7252395B2 (en) * | 2021-07-02 | 2023-04-04 | 株式会社神戸製鋼所 | Aluminum alloy plate for magnetic disk, aluminum alloy blank for magnetic disk and aluminum alloy substrate for magnetic disk |
WO2023276572A1 (en) * | 2021-07-02 | 2023-01-05 | 株式会社神戸製鋼所 | Aluminum alloy plate for magnetic discs, aluminum alloy blank for magnetic discs, and aluminum alloy substrate for magnetic discs |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7027210B2 (en) | 2018-03-26 | 2022-03-01 | 株式会社Uacj | Aluminum alloy plate for magnetic disk and its manufacturing method, and magnetic disk using the aluminum alloy plate for magnetic disk |
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