JPS5450439A - Manufacture of alumite substrate - Google Patents
Manufacture of alumite substrateInfo
- Publication number
- JPS5450439A JPS5450439A JP11662077A JP11662077A JPS5450439A JP S5450439 A JPS5450439 A JP S5450439A JP 11662077 A JP11662077 A JP 11662077A JP 11662077 A JP11662077 A JP 11662077A JP S5450439 A JPS5450439 A JP S5450439A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- heat treatment
- grinding process
- oxide layer
- press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Manufacturing Of Magnetic Record Carriers (AREA)
- Thin Magnetic Films (AREA)
- Electrochemical Coating By Surface Reaction (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE: To obtain an Alumite substrate the aluminum oxide layer of which is not cracked at the time of heat treatment, by setting a press annealing process after an aluminum substrate grinding process.
CONSTITUTION: When an Al substrate formed by lathe working is press annealed, this process is carried out between an Al substrate surface grinding process and a polishing process or between the polishing process and an anodizing process. Thus, working strain generated again in the grinding process where strong external force is applied to the substrate can be relieved. Accordingly, an atomic reconfiguration phenomenon does not occur at the time of later heat treatment to magnetize iron oxide, whereby the occurence of cracking can be prevented in the resulting aluminum oxide layer
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11662077A JPS5450439A (en) | 1977-09-30 | 1977-09-30 | Manufacture of alumite substrate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11662077A JPS5450439A (en) | 1977-09-30 | 1977-09-30 | Manufacture of alumite substrate |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5450439A true JPS5450439A (en) | 1979-04-20 |
Family
ID=14691686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11662077A Pending JPS5450439A (en) | 1977-09-30 | 1977-09-30 | Manufacture of alumite substrate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5450439A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108878127A (en) * | 2018-07-02 | 2018-11-23 | 武汉科技大学 | A kind of high-compactness soft magnetism composite iron core and preparation method thereof |
-
1977
- 1977-09-30 JP JP11662077A patent/JPS5450439A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108878127A (en) * | 2018-07-02 | 2018-11-23 | 武汉科技大学 | A kind of high-compactness soft magnetism composite iron core and preparation method thereof |
CN108878127B (en) * | 2018-07-02 | 2021-04-02 | 武汉科技大学 | High-density soft magnetic composite iron core and preparation method thereof |
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