As the eutectic time increases , the graphite morphology departs from sphericity to the abnormal morphology , and the roundness of the graphite particles decreases as well 随着共晶时间的延长，铸件的石墨形态逐渐偏离球形，向异常化趋势发展，石墨颗粒的圆整度随之降低。
The containerless rapid solidification of al - 32 . 7wt % cu eutectic alloy in drop tube is investigated . the " lamellar eutectic - anomalous eutectic " microstructural morphology transition occurs with the decrease of droplet size 采用落管无容器处理技术研究了al - 32 . 7wt cu二元共晶合金在深过冷条件下的快速凝固规律。
2 . the room temperature tensile strength of alloy made by mlsd relate to the extrusion temperature and the extrusion reduction ratio , with high temperature and reduction ratio , the tensile strength becomes low 二、多层喷射沉积过共晶a1 - si合金的室温强度与挤压温度和挤压比有关，挤压温度越高，合金的强度会降低。
Containerless processing is a promising way to study rapid solidification . it can efficiently eliminates heterogeneous nucleation induced by container wall so that large undercoolings can be achieved prior to solidification 同时，采用落管无容器处理技术，研究了al - 32 . 7wt cu二元共晶合金的深过冷及快速凝固行为。
The tensile strength and ductility of ni , cr , al - tac eutectic in - situ composite at room temperature is obviously improved with increasing the volume fraction of tac and decreasing the inter - rod spacing and the diameter Ni ， cr ， al - tac共晶自生复合材料室温拉伸性能，随着纤维体积分数的增加和纤维间距与尺寸的减小而提高。
But it is mainly dependant on the physical parameters such as volume shrinkage . and when phbv crystallized , the hv content will be segregated , it will be accelerated when crystallization temperature is increased 在结晶过程中， phbv二元共晶中hv (羟基戊酸)组分会受到排斥，结晶温度的升高会导致hv组分分凝现象的加剧。
The graphite morphologies and the relevant mechanical properties of ductile iron sample with different eutectic times was studied by using the self - developed cooling apparatus for simulating the casting with heavy section 摘要使用自行研制的大断面铸件冷却模拟装置，研究了不同共晶时间球墨铸铁样品的石墨形态及相关的力学性能。
Influenced by the alternating current field , except that a little of eutectic iron - phase still is the acicular structure , the most of eutectic iron - phase of the al - 20si - 5fe - mn alloy is refined into tiny particles which is segregated Al - 20si - 5fe - xti合金通过交流电场作用，共晶组织全部呈细小的颗粒状均匀分布于- al基体上。
Under the conditions of low stress abrasion , eutectic composition is the optimal composition of high - cr white cast iron . the narrow intercarbide spacing is quite benefical to protect the austenitic matrix 摘要低应力磨料磨损条件下，高铬白口铸铁以共晶成分为宜，在细小的共晶组织中，碳化物间的短小空间对共晶奥氏体起到良好的保护作用。
4 . under the directional solidification , either sub - or hyper - eutectic alloys , with the increase of growth rate , the lst dendritic arm spacing decreases and 2st dendritic arm spacing is restrained to some extent 4定向凝固条件下，随着凝固速率的增加，无论亚共晶合金或过共晶合金，一次枝晶间距减小，二次枝晶生长得到不同程度的抑制。
