1988 Fiscal Year Final Research Report Summary
Evaluation of Strontium Modification of Al-Si casting alloys
| Project/Area Number |
60550493
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
金属加工(含鋳造)
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| Research Institution | Chiba Institute of Technology |
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Principal Investigator |
KONO Norio Professor of Chiba Institute of Technology, 工学部, 助教授 (80083822)
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| Co-Investigator(Kenkyū-buntansha) |
WATANABE Hisafuji Professor of Chiba Institute of Technology, 工学部, 教授 (90083815)
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| Project Period (FY) |
1985 – 1987
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| Keywords | Al-Si-Sr casting alloy / modification of Al-Si alloy / Strontium modification modification effect / 熱分析 / 組織の微細化 |
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| Research Abstract |
An atempt to evaluate strontium modification effect was made by means of highly accurate thermal analysis for al-12.6 to 13.3%Si alloys containing Sr up to 0.19% and optical microscopy. The arrest temperature on thermal analysis corves caused by eutectic reaction and the supercooling degree have close correlations with eutectic structures and are applicable as measures for routine evaluation of the modification effect. The difference in shape of thermal analysis curves corresponds to the difference in composition of the alloy in Al-Si-Sr ternaly phase diagram. When 5kg of molten al-12.6%Si alloy containing Sr is held at 730゜C, the modification effect remains for about 12h.
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