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EFFECTS OF MISCHMETAL ADDITION ON THE CAST MICROSTRUCTURE OF 6063 ALLOYS 被引量:4
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作者 刘晶元 丁培道 +1 位作者 潘复生 周守则 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1997年第1期63-69,共7页
Effect of mischmetal addition on the cast microstructure of 6063 alloys has been investigated by means of optical microscopy, TEM and anode filming etc. The results show that there is a critical content of fining dend... Effect of mischmetal addition on the cast microstructure of 6063 alloys has been investigated by means of optical microscopy, TEM and anode filming etc. The results show that there is a critical content of fining dendrite structure by adding mischmetal to 6063 alloys. This critical mischmetal content is about 0.15%. Only when the mischmetal content is above 0.15%, the secondary dendrite arm spacing decreased and eutectic structure fined. The cast grain is obviously refined when the content of mischmetal is lower. Consideration from the cast structure, the suitable mischmetal content in 6063 alloys is 0.20%. 展开更多
关键词 cast structure mischmetal deforming aluminum alloy secondary dendrite arm spacing GRAIN
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Effect of RE on Cast Structure and Properties of High Manganese Aluminium Bronze 被引量:4
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作者 季玮 《Journal of Rare Earths》 SCIE EI CAS CSCD 1996年第1期36-40,共5页
The effects of various amount of Y and La on the cast structure.the fluidity,the wearability and corrosion resistance of the high manganese aluminium bronze have been investigated.The results have shown that a proper ... The effects of various amount of Y and La on the cast structure.the fluidity,the wearability and corrosion resistance of the high manganese aluminium bronze have been investigated.The results have shown that a proper content of rare earth elements is able to refine the cast structure of the alloy,and furthermore to enhance its wearability and corrosion resistance.The reasons for these phenomena have also been discussed. 展开更多
关键词 RE elements Aluminium bronze cast structure wearability Corrosion resistibility
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Casting structure of pure aluminum by electric pulse modification at different superheated temperatures 被引量:6
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作者 Jingang Qi Jianzhong Wang +2 位作者 Xingjiang Liu Bing Wang Daqiang Cang 《Journal of University of Science and Technology Beijing》 CSCD 2005年第6期527-530,共4页
Electric pulse modification (EPM) is a novel technique that reduces grain size by altering the structure of a melt. It was investigated that the response of the casting structure of high pure aluminum to EPM in diff... Electric pulse modification (EPM) is a novel technique that reduces grain size by altering the structure of a melt. It was investigated that the response of the casting structure of high pure aluminum to EPM in different superheated melts. The results indicate that the grain refining effect of a given pulse electric field holds an optimal temperature range, moreover, a lower or higher superheated temperature will both disadvantage the improvements of casting structure. It essentially lies in the cooperative action between the distorted absorption of clusters and the activated capability of atoms in the aluminum melt. 展开更多
关键词 electric pulse modification SUPERHEAT casting structure CLUSTER activated ability
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Metallurgical quality of CSP thin slabs
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作者 DeguangZhou JieFu +3 位作者 YonglinKang ZhongbingWang: JingLi ZhongboXu 《Journal of University of Science and Technology Beijing》 CSCD 2004年第2期106-109,共4页
The casting structure, chemical composition segregation, dendrite arm space,inclusiona and during the CSP (compact strip production) rolling process were investigated. Theresults show that the CSP thin slab has a feat... The casting structure, chemical composition segregation, dendrite arm space,inclusiona and during the CSP (compact strip production) rolling process were investigated. Theresults show that the CSP thin slab has a feature of uniform fine grains, more columnar crystals,less central porosity and segregation etc. There is no great difference in macrostructure betweenthe CSP thin slab and conventional slab; however, the fine dendrite structure of the CSP slab ismore uniform. Moreover, the central porosity and segregation are obviously improved after the firstpass; and the dendrite is bent along the rolling direction rather than broken into pieces. Smallinclusions with the diameter less than 10 mum in the CSP slab are dominantly consisted of aluminatesformed by Al deoxidation and Ca treatment and not floating out of the melt. The large sizeinclusions found in the continuous casting slab are very few. 展开更多
关键词 CSP casting structure SEGREGATION dendrite arm space INCLUSION
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