【摘要】 本文用测定铝合金中溶氢量,试样针孔率及合金流动性等方法对比了富铈混合稀土(RE)、钇族混合稀土(Y)及C2Cl6、无毒精炼剂在铝合金中的除氢效果,获得了稀土加入量,静置时间与铝液中溶氢量及试样针孔率间的关系曲线,提出了混合稀土金属加入铝液的最佳工艺参数。实验表明,铸铝中加入一定量的混合稀土有明显的有利作用。此外,稀土金属还对铝-硅合金兼有变质强化作用。本文还对稀土作用机理作了初步的探讨。更多还原

【Abstract】 AbstractBy means of determining the dissolved hydrogen in liquid aluminium, the pinhole rate in the alloy’s fluidity, the author studied the dehydrogenation with adding mixed rare earth and yttrium garths family with hexachloroethane and poisonless refining reagent. The relationahip the rare earths addition, the placing time versus the dissolved hydrogen in liquid aluminium and the pinho’.e rate were obtained respectively. Furthermore, the optima! technological of adding mixed rare earths to the liquid aluminium are recoinmanded. The experiments have shown that the mixed rare added properly results in tangible advantages. The author believes that rare earth iaetals also inoculate the aluminiumsilliccn alloy and thus strenthen it. The elemantal investigation on the raechaninn of rare role was made in this paper.更多还原