Y.Ma
,
Y.Hao
,
S.Z.Kou
,
X.N.Lu
金属学报(英文版)
Based on the experiment and the thermodynamics analysis for CuO/Al system, it is founded that the compounding reaction of CuO/Al under low temperature is available. The general equation of adiabatic temperature of the system is set up, and the influence of resultant concentration and temperature on adiabatic temperature is theoretically analyzed. The values of heat effect of CuO/Al system under different temperature are also caculated.
关键词:
composite in situ
,
null
,
null
Y.Ma
,
Y.Hao
,
F.Y.Yan
,
H.J.Liu
金属学报(英文版)
The new technology of continuous casting by heated mold was used to produce directional solidification ZA alloy lines to eliminate the inter defects of these lines and increase their mechanical properties.The results are as follows:(1) The microsturcture of the ZA alloy lines is the parallel directional dendritic columnar crystal.Every dendritic crystal of eutectic alloy ZA5 was composed of many layer eutectic β and η phases.The microstructure of hypereutectic ZA alloys is primary dendritic crystal and interdendritic structure.The primary phase of ZA8 and ZA12 is β,among them,but the primary phase of ZA22 and ZA27 ia α。（2)Through the test to the as-cast ZA alloy lines made in continuous casting by heated mold,it is found that the tensile strength and hardness increase greatly,but the elongation decreases.With the increase of aluminum amount from ZA5 to ZA12,ZA22 and ZA27,the tensile strength increases gradually.ZA27 has the best comprehensive mechanical properties in these four kinds of ZA alloys.(3)Heat treatment can decrease the dendritic segregation and improve the elongation of ZA alloy,but make their strength decrease slightly.
关键词:
zinc-aluminum alloy
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null
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null
