论文部分内容阅读
以温度诱导的液-液结构转变为切入点,研究了Sn-10%Bi合金经不同过热处理后凝固行为和凝固组织的变化。首先利用自制的定向凝固装置进行了液-液结构转变对Sn-10%Bi合金的定向凝固影响的研究。然后测定经不同过热处理的合金熔体相应的凝固曲线,并观察凝固组织。结果表明,相对于在结构转变前保温处理的熔体,经历了结构转变的合金熔体,凝固时所需过冷度增大,并且凝固组织显著细化;揭示了温度诱导液-液结构转变对合金凝固行为及组织有着明显影响。
Based on the temperature-induced liquid-liquid structure transition, the solidification behavior and solidification structure of Sn-10% Bi alloy after different superheating treatments were investigated. Firstly, the effect of liquid-liquid structure transformation on the directional solidification of Sn-10% Bi alloy was investigated by using self-made directional solidification equipment. Then, the corresponding solidification curve of the alloy melt subjected to different overheating was measured, and the solidified structure was observed. The results show that, compared with the melt heat-treated before the structural transformation, the alloy melt undergoing structural transformation increases the undercooling required for solidification and remarkably reduces the solidified microstructure. The temperature-induced liquid-liquid structure transformation is revealed The alloy solidification behavior and the organization has a significant impact.