2021 Fiscal Year Final Research Report
Possibility of cold recycling of discarded metal housing into ductile plates
| Project/Area Number |
20K21862
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 64:Environmental conservation measure and related fields
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| Research Institution | Shinshu University |
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Principal Investigator |
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| Project Period (FY) |
2020-07-30 – 2022-03-31
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| Keywords | コールドリサイクル / 廃棄金属筐体 / 延性蘇生 / インクリメンタル平坦化 / 変形集合組織 / 曲げ性 / アップグレード / インクリメンタルフォーミング |
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| Outline of Final Research Achievements |
We examined the possibility of cold recycling of discarded metal housing into ductile plates with a uniform thickness by plastic deformation at room temperature without melting the metal. We focused on the randomization of the deformed texture observed during incremental flattening for cold recycling and examined the recovery of ductility by changing the pitch of hammering during incremental flattening. The pitch of hammering is considered to control the level of randomization. The results indicate that the bendability of hard aluminum plates that were cold-recycled with a small pitch was superior to that of original plates.
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| Free Research Field |
塑性加工学
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| Academic Significance and Societal Importance of the Research Achievements |
廃棄金属筐体を熔解せずに室温状態で塑性変形させて平板に戻すコールドリサイクルが可能になれば，熔解過程を経ないため温室効果ガス排出量が激減する．しかしコールドリサイクル板は，加工硬化部の低延性によりその再成形は難しい．このためコールドリサイクルの成否は延性の蘇生にある．コールドリサイクル過程のインクリメンタル平坦化による変形集合組織のランダム化という新発想の視点から延性蘇生の可能性を明らかにした．
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