1988 Fiscal Year Final Research Report Summary
Development of high strength refractory aluminum alloys by extrusion of rapidly solidified alloy powders
| Project/Area Number |
62850128
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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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 | Toyama National College of Technology |
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Principal Investigator |
TAI Hideo Toyama Nat.College of Tech.,Dept.Met.Eng.,Professor, 金属工学科, 教授 (80029074)
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| Co-Investigator(Kenkyū-buntansha) |
MAE Takehiko Toyama Nat.College of Tech.,Dept.Met.Eng.,Assistant Professor, 金属工学科, 助教授 (10042821)
浦井 茂雄 富山工業高等専門学校, 金属工学科, 助教授 (30042831)
ASADA Minoru Toyama Nat.College of Tech.,Dept.Met.Eng.,Professor, 金属工学科, 教授 (50042825)
TERANISHI Tsunenobu Toyama Nat.College of Tech.,Dept.Mech.Eng.,Assistant, 機械工学科, 助手 (20141880)
URAI Shigeo Toyama Nat.College of Tech.,Dept.Met.Eng.,Assistant Professor
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| Project Period (FY) |
1987 – 1988
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| Keywords | aluminum alloy / rapid solidification / powder metallurgy / hot-extrusion / centrifugal atomizing / Al-Cr-Zr alloy / Al-Si合金 |
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| Research Abstract |
Production technology of high strength refractory aluminum alloys by extrusion of rapidly solidified alloy powders were investigated.
Rapidly solidified powders of Al-1.8%Cr-1.7%Zr alloy and Al-Si alloys containing si up to 18% were prepared by rotating disk centrifugal atomizer driven by high fre-quency motor . The rapidly solidified alloy powders were hot-extruded after cold-compaction. The hot-extrusion presure for al-1.8%Cr-U.7%Zr alloy and Al-Si alloys were 27.5 kgf/mm^2at 450゜C and 55 kgf/mm^2at 512゜C, respectively. Grain size of these P/M alloys were very fine and particles of intermetallic compound or Si crystallized in the alloys were very small compared with that of I/M alloys. Vickers micro-hard-ness number of the Al-1.8%Cr-1.7%Zr alloy after extrusion was 64 and could be held to be60,54 and 43 after 36 hr annealing at 300,400 and 500゜C, respectively. The micro-hardness and tensile strength of Al-Si P/M alloys were increased with Si content and fracture elongation for these P/M alloys were about 10-15% higher than that for I/M alloys
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