【摘要】 本文的目的是通过采用钠锶合加变质的方法,探讨合加变质的规律,以合加变质后硅的形貌以及钠、锶元素分布的规律中,考察合加变质同单元素变质间的差异及其特点。研究的结果表明:合加变质后,充分发挥了钠锶元素的各自长处,克服了其存在的不足,从而获得了较理想的变质效果。更多还原

【Abstract】 In this paper, we make a thorough study of the effects and features of the aluminium-silicon alloy under the combined modification of strontium and sodium. The result of our study shows that in the process of the combined modification,because of their mutual influences, the strontium and sodium elements give fully play to their strong points and at the same time overcome their weak points.更多还原