摘要:The as-cast structure of the high-aluminium zinc foundry alloy ZA27 can be refined by addition of rare earth metal-cerium with the tensile strength and elongation of the alloy improved. Cerium exists mainly in solid solution in the alloy for small cerium additions (0.1%). While the compound Ce2Zn17 can be observed in the alloy for about 1 % cerium addition. For the grain refinement of the zinc alloy by cerium, remelting and breaking-off of the dendrite branches caused by constitutional undercooling seem to play impotant role.
摘要:The interreaction between the melt of Al-Li alloys and the surface of several sand moulds was studied in this paper with a sands-covered graphite mould,and the influence of some ceramic coatings on the surface quality of the alloy was investigated. The result and analysis showed that dried sand mould and inert coatings were suitable moulding materials for Al-Li casting applications.
摘要:In this paper , the basic law of curing process and principle for production control are discussed by means of measure curing dynamic curve , curing degree and wetstrengh of ceramic shell.
摘要:The paper proposed the process of high efficiency of refining and low cost of treating-the Spinning Hood (SH), and the water simulation experiment was carried out in lab. The results of experiment show the condition of gas removing dynamics of SH is better than that of rest hood (RH).
摘要:This paper researches on the foaming procedure of aluminum alloy in molten state and believes that the procedure is feasible for making foam metals.